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<s> Chọn đáp án đúng với câu hỏi: It is mentioned in paragraph 3 that ________.
A. the show has been staged in many places
B. many companies are involved in the production
C. the show need financial support
D. it is difficult to find suitable equipment Đáp án là: B. many companies are involved in the production </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Đáp án không thể hiện đúng thái độ của sĩ phu Bắc Hà:
A. Kẻ sĩ mai danh ẩn tích uổng phí tài năng
B. Người ra làm quan thì giữ mình không dám nói thẳng
C. Nhiều người có tài năng còn chưa chịu ra giúp nước
D. Nhiều người ngưỡng mộ tài năng của vua Quang Trung đã ra tiến cử Đáp án là: D. Nhiều người ngưỡng mộ tài năng của vua Quang Trung đã ra tiến cử </s>
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<s> Chọn đáp án đúng với câu hỏi: Trong các cách làm dưới dây, cách nào làm tăng ma sát?
A. Tăng thêm vòng bi ở ổ trục
B. Rắc cát trên đường ray xe lửa
C. Khi di chuyển vật nặng, bên dưới đặt các con lăn
D. Tra dầu vào xích xe đạp Đáp án là: B. Rắc cát trên đường ray xe lửa </s>
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<s> Chọn đáp án đúng với câu hỏi: the Internet that they (5)________. Experts from all over the world worry that teenagers’ addiction to technology
A. carry on
B. get off
C. turn to
D. find out Đáp án là: C. turn to </s>
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<s> Chọn đáp án đúng với câu hỏi: Hỗn hợp A gồm ba peptit mạch hở có tỉ lệ mol tương ứng là 1 : 1 : 2. Thủy phân hoàn toàn m gam A thu được hỗn hợp sản phẩm gồm 52,5 gam Glyxin và 71,2 gam Alanin. Biết số liên kết peptit trong phân tử X nhiều hơn trong Z và tổng số liên kết peptit trong ba phân tử X, Y, Z nhỏ hơn 10. Giá trị của m là
A. 103,9.
B. 101,74.
C. 100,3.
D. 96,7. Đáp án là: A. 103,9. </s>
|
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] |
<s> Chọn đáp án đúng với câu hỏi: Chọn phát biểu sai:
A. Tam giác đều có ba cạnh
B. Ba cạnh của tam giác đều bằng nhau
C. Bốn góc của tam giác đều bằng nhau
D. Tam giác đều có ba đỉnh Đáp án là: C. Bốn góc của tam giác đều bằng nhau </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Một bánh xe của người đi xe đạp quay được 20 vòng trong 4 giây. Bánh xe quay được góc có số đo (rad) trong 1 giây là
A. 10π;
B. 9π;
C. 8π;
D. 7π. Đáp án là: A. 10π; </s>
|
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1
] |
<s> Chọn đáp án đúng với câu hỏi: Nhúng một đinh sắt vào 150ml dung dịch CuSO 4. Sau khi phản ứng xảy ra hoàn toàn, lấy đinh sắt sấy khô, thấy khối lượng tăng lên 1,2g. Vậy nồng độ ban đầu của CuSO 4 là:
A. 1M
B. 2,5M
C. 2M
D. 0,5M Đáp án là: A. 1M </s>
|
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
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1,
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] |
<s> Chọn đáp án đúng với câu hỏi: What does Bob do in his bedroom?
A. He does his homework
B. He sleeps
C. He plays computer games
D. All are correct Đáp án là: D. All are correct </s>
|
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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<s> Chọn đáp án đúng với câu hỏi: Trong 30 năm cuối thế kỉ XIX, vị trí kinh tế của Mĩ trong nền kinh tế thế giới có sự thay đổi như thế nào?
A. Vươn lên đứng thứ 2 thế giới
B. Vươn lên đứng thứ 1 thế giới
C. Đứng hàng thứ 3 thế giới
D. Đứng hàng thứ 4 thế giới Đáp án là: B. Vươn lên đứng thứ 1 thế giới </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Lá của cây nào dưới đây được sử dụng làm thức ăn cho con người?
A. Lá mồng tơi
B. Lá bàng
C. Lá mía
D. Lá xà cừ Đáp án là: A. Lá mồng tơi </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Choose the best phrases or clauses A,B,C,or D to complete each of the sentences below. _____________ did Jane accept the job.
A. Only because it was interesting work
B. The work was interesting
C. Only because it was interested work
D. Because it was interesting work Đáp án là: A. Only because it was interesting work </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Một hình vuông có diện tích là 36 cm^2. Vậy chu vi hình vuông đó là:
A. 36 cm;
B. 24 cm;
C. 6 cm;
D. 12 cm. Đáp án là: B. 24 cm; </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Mark the letter A, B, C, or D to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.
A. a ccurate
B. a ccount
C. a ccept
D. a ccuse Đáp án là: A. a ccurate </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Choose the letter A, B, C or D to indicate the word that differs from the other three in the position of stress in each of the following questions. (Chọn đáp án A, B, C hoặc D để tìm từ có trọng âm khác với ba từ còn lại)
A. h eating
B. h eir
C. h ockey
D. h unting Đáp án là: B. h eir </s>
|
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381,
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2,
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1,
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1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Tỉ số phần trăm giữa:18 và 25 là:
A. 73%
B. 27%
C. 72%
D. 27% Đáp án là: C. 72% </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Chính quyền trung ương dưới thời nhà Nguyễn được tổ chức theo mô hình thời nhà nào trước đó?
A. Thời nhà Lý
B. Thời nhà Trần
C. Thời nhà Lê
D. Thời nhà Đinh - Tiền Lê Đáp án là: C. Thời nhà Lê </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Cho các phát biểu sau: I. Gen là một đoạn ADN mang thông tin mã hóa cho một sản phẩm xác định, sản phẩm đó có thể là phân tử ARN hoặc chuỗi pôlipeptit. II. Một đột biến điểm xảy ra trong vùng mã hóa của gen có thể không ảnh hưởng gì đến chuỗi pôlypeptit mà gen đó tổng hợp. III. Có ba bộ ba làm tín hiệu kết thúc quá trình dịch mã là 5’UAA3’; 5’UAG3’ và 3’UGA5’. IV. Gen bị đột biến sẽ tạo alen mới, cung cấp nguyên liệu cho quá trình tiến hóa. Trong các phát biểu trên, có mấy phát biểu sai?
A. 1.
B. 2.
C. 3.
D. 4. Đáp án là: A. 1. </s>
|
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1,
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1,
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1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Since childcare is expensive, this saves money for the young couple trying to establish (33)______ and provide a secure environment for the family.
A. himself
B. themselves
C. herself
D. itself Đáp án là: B. themselves </s>
|
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2,
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] |
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1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: I’ll take the new job whose salary is fantastic.
A. reasonable
B. acceptable
C. pretty high
D. wonderful Đáp án là: D. wonderful </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Thực hiện các thí nghiệm sau: (1) Cho Cu vào dung dịch HNO 3 đặc, nóng. (2) Cho NaCl vào dung dịch H 2 SO 4 loãng. (3) Đun nóng dung dịch NaHCO 3. (4) Cho thanh nhôm vào dung dịch NaOH. (5) Cho mẫu Na vào dung dịch KHCO 3. Số thí nghiệm tạo ra chất khí là:
A. 2.
B. 4.
C. 5.
D. 3. Đáp án là: B. 4. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Đâu không phải là những biện pháp thực hiện của kế hoạch Nava trước khi bị đảo lộn?
A. Tăng cường viện binh cho Đông Đương
B. Tập trung 44 tiểu đoàn quân cơ động ở đồng bằng Bắc Bộ
C. Mở các cuộc tiến công vào Ninh Bình, Thanh Hóa để phá kế hoạch tiến công của ta
D. Tập trung lực lượng xây dựng tập đoàn cứ điểm Điện Biên Phủ Đáp án là: D. Tập trung lực lượng xây dựng tập đoàn cứ điểm Điện Biên Phủ </s>
|
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1,
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1,
1,
1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Đường bờ biển khúc khuỷu, nhiều vũng vịnh thuận lợi cho Nhật Bản phát triển ngành
A. du lịch sinh thái biển.
B. giao thông vận tải biển.
C. khai thác khoáng sản biển.
D. nuôi trồng hải sản. Đáp án là: A. du lịch sinh thái biển. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following sentences. They drove fifteen miles off the main road. Also, they had nothing to eat for the day.
A. They drove fifteen miles off the main road until they had something to eat for the day.
B. They neither drove fifteen miles off the main road nor had anything to eat for the day.
C. Not only did they drive fifteen miles off the main road, they also had nothing to eat for the day.
D. Driving fifteen miles off the main road, they eventually had something to eat for the day. Đáp án là: B. They neither drove fifteen miles off the main road nor had anything to eat for the day. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Kinh đô của nước Văn Lang đặt ở
A. Phong khê (Hà Nội).
B. Phong Châu (Phú Thọ).
C. Mê Linh (Hà Nội).
D. vùng cửa sông Tô Lịch (Hà Nội). Đáp án là: B. Phong Châu (Phú Thọ). </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Nguồn âm điểm O phát sóng âm đẳng hướng ra không gian, môi trường không hấp thụ. Điểm M cách nguồn âm một quãng r có mức cường độ âm 20 dB. Tăng công suất nguồn âm lên n lần thì mức cường độ âm tại N cách nguồn r/2 là 30 dB. Giá trị của n là
A. 4
B. 4,5
C. 2
D. 2,5 Đáp án là: D. 2,5 </s>
|
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Giá trị lớn nhất của hàm số y=x^4-3x^2+2 trên đoạn (0;3) bằng
A. 57
B. 55
C. 56
D. 58 Đáp án là: A. 57 </s>
|
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[
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: 3 cạnh của hình tam giác có độ dài bằng nhau. Hình tam giác đó có chu vi bằng 24 cm. Vậy độ dài mỗi cạnh của hình tam giác đó là:
A. 21 cm
B. 27 cm
C. 8 cm
D. 9 cm Đáp án là: C. 8 cm </s>
|
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] |
<s> Chọn đáp án đúng với câu hỏi: (THPT Chuyên ĐH Sư phạm Hà Nội – lần 3 2019) : Một loài sinh vật có bộ nhiễm sắc thể lưỡng bội 2n = 14. Nếu xảy ra đột biến lệch bội thì số loại thể một tối đa có thể được tạo ra trong loài này là
A. 7
B. 15
C. 8
D. 14 Đáp án là: A. 7 </s>
|
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1,
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1,
1,
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1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Ngành công nghiệp nào sau đây ở Cộng hòa Nam Phi phát triển mạnh với hàng nghìn doanh nghiệp hoạt động?
A. Hóa chất.
B. Chế tạo máy.
C. Điện tử.
D. Luyện kim. Đáp án là: C. Điện tử. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: The archaeologists were astonished to find such _______ at that particular site.
A. an incredibly rare beautiful artifact
B. a rare incredibly beautiful artifact
C. a beautiful artifact incredibly rare
D. an incredibly beautiful rare artifact Đáp án là: D. an incredibly beautiful rare artifact </s>
|
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1
] |
<s> Chọn đáp án đúng với câu hỏi: Một con lắc lò xo gồm vật nhỏ và lò xo nhẹ, đang dao động điều hòa trên mặt phẳng nằm ngang. Động năng của con lắc đạt giá trị cực tiểu khi
A. lò xo không biến dạng.
B. vật có vận tốc cực đại.
C. vật đi qua vị trí cân bằng.
D. lò xo có chiều dài cực đại. Đáp án là: D. lò xo có chiều dài cực đại </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Chiếm vị trí thứ hai trong cơ cấu GDP phân theo khu vực kinh tế của nhóm nước đang phát triển (năm 2004) là
A. khu vực I
B. khu vực II
C. khu vực III
D. khu vực I và II Đáp án là: B. khu vực II </s>
|
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] |
<s> Chọn đáp án đúng với câu hỏi: Thời vua A-cơ-ba ở Ẩn Độ đã xây dựng một chính quyền mạnh mẽ, dựa trên sự liên kết tầng lớp quý tộc nào?
A. Số quan lại người Mông cổ và Ấn Độ
B. Số quan lại Ấn Độ Hồi giáo và gốc Ấn Độ Ấn Độ giáo
C. Số quan lại gốc Mông cổ, gốc Ấn Độ Hồi giáo và gốc Ấn Độ Ấn Độ giáo
D. Số tu sĩ và quý tộc trí thức Đáp án là: C. Số quan lại gốc Mông cổ, gốc Ấn Độ Hồi giáo và gốc Ấn Độ Ấn Độ giáo </s>
|
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
1,
1,
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1,
1,
1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Trong câu “Hồng cốm tốt đôi” từ “hồng” chỉ sự vật gì?
A. Qủa hồng
B. Tơ hồng
C. Giấy hồng
D. Hoa hồng Đáp án là: A. Qủa hồng </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Nguyên nhân chính hạn chế sự phát triển các nhà máy nhiệt điện chạy bằng than ở các tỉnh phía Nam nước ta là:
A. Việc xây dựng đòi hỏi vốn đầu tư lớn.
B. Gây ô nhiễm môi trường nghiêm trọng.
C. Xa các nguồn nguyên liệu.
D. Nhu cầu về điện không cao như các tỉnh phía bắc Đáp án là: C. Xa các nguồn nguyên liệu. </s>
|
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1,
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1,
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] |
<s> Chọn đáp án đúng với câu hỏi: Ngoại lực và nội lực tạo ra các dạng địa hình trên bề mặt có đặc điểm nào sau đây?
A. Hai lực giống nhau và tác động đồng thời nhau.
B. Hai lực đối nghịch nhau, tác động đồng thời nhau.
C. Hai lực đối nghịch nhau, tác động luân phiên nhau.
D. Hai lực giống nhau, không tác động đồng thời nhau. Đáp án là: B. Hai lực đối nghịch nhau, tác động đồng thời nhau. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: All _____________ barristers are expected to study at the Inns of Court.
A. hopeful
B. wishful
C. willing
D. prospective Đáp án là: D. prospective </s>
|
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29901,
360,
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10791,
12645,
29871,
2,
2
] |
[
1,
1,
1,
1,
1,
1,
1,
1,
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1,
1,
1,
1,
1,
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1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Thế năng của một vật phụ thuộc vào những yếu tố nào của vật?
A. Độ cao, khối lượng.
B. Độ cao, thể tích.
C. Độ cao, khối lượng riêng.
D. Độ cao, vận tốc. Đáp án là: A. Độ cao, khối lượng. </s>
|
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2,
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] |
<s> Chọn đáp án đúng với câu hỏi: Cho m (gam) hỗn hợp K và Ba vào một lượng nước dư thu được dung dịch X và V lit khí (đktc). Sục từ từ đến dư khí CO 2 vào dung dịch X, kết quả thí nghiệm được biểu diễn trên đồ thị sau: Khối lượng của K có trong m gam hỗn hợp là
A. 13,8 gam.
B. 11,7 gam.
C. 7,8 gam.
D. 31,2 gam. Đáp án là: C. 7,8 gam. </s>
|
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1,
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1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Động vật nào đào hang, lót ổ để bảo vệ con?
A. Cá chép
B. Thằn lằn bóng đuôi dài
C. Thủy tức
D. Thỏ Đáp án là: D. Thỏ </s>
|
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1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Chiến thắng quân sự nào của quân dân miền Nam Việt Nam đã làm phá sản về cơ bản chiến lược "Chiến tranh đặc biệt" của Mĩ?
A. Ấp Bắc (Mĩ Tho).
B. Bình Giã (Bà Rịa).
C. Vạn Tường (Quảng Ngãi).
D. Núi Thành (Quảng Nam). Đáp án là: B. Bình Giã (Bà Rịa). </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Chọn câu đúng, đứng ở trái đất ta sẽ thấy:
A. Trái đất đứng yên, mặt trời và mặt trăng quay quanh trái đất
B. Mặt trời đứng yên, trái đất quay quanh mặt trời, măth trăng quay quanh trái đất
C. Mặt trời đứng yên, trái đất và mặt trăng quay quanh mặt trời
D. Mặt trời và mặt đất đứng yên, mặt trăng quay quamh trái đất Đáp án là: A. Trái đất đứng yên, mặt trời và mặt trăng quay quanh trái đất </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Nước ban hành Đạo luật trung lập (tháng 8 - 1935) là
A. Liên Xô
B. Mĩ
C. Anh
D. Pháp Đáp án là: B. Mĩ </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Set in a quiet environment, Hoi An is _____ by peaceful villages that have crafts such as carpentry, bronze making, and ceramic.
A. surrounded
B. surrounding
C. to surrounded
D. to surrounding Đáp án là: A. surrounded </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Theo em, từ tượng thanh trong các ngôn ngữ khác nhau là:
A. Giống nhau
B. Khác nhau
C. không có
D. Có thể khác hoặc giống Đáp án là: D. Có thể khác hoặc giống </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Hãy chọn khẳng định sai.
Hình hộp chữ nhật ABCD.A'B'C'D' có:
A. 8 đỉnh;
B. 4 mặt bên;
C. 6 cạnh;
D. 6 mặt. Đáp án là: C. 6 cạnh; </s>
|
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29953,
274,
30540,
29876,
29882,
29936,
29871,
2,
2
] |
[
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1,
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1,
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1,
1,
1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Cho bảng số liệu: GDP CỦA LIÊN MINH CHÂU ÂU (EU) SO VỚI THẾ GIỚI Chỉ số EU Thế giới GDP (tỉ USD) 15276 84705,4 tỉ USD Vẽ biểu đồ thể hiện cơ cấu GDP của Liên minh châu Âu (EU) so với thế giới.
A. Biểu đồ tròn.
B. Biểu đồ cột.
C. Biểu đồ đường.
D. Biểu đồ cột ghép. Đáp án là: A. Biểu đồ tròn. </s>
|
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1,
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1,
1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
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1,
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1,
1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Rút gọn biểu thức (- xy)^11: (xy)^10 ta được
A. 1
B. 0
C. - xy
D. xy Đáp án là: C. - xy </s>
|
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2,
2
] |
[
1,
1,
1,
1,
1,
1,
1,
1,
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1,
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1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Đường hàng không của Hoa Kì đảm nhận vận chuyển bao nhiêu tổng số hành khách trên thế giới?
A. 2/3
B. 1/3
C. 3/4
D. 4/5 Đáp án là: B. 1/3 </s>
|
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Sự thay đổi có quy luật của tất cả các thành phần địa lí và cảnh quan địa lí từ Xích đạo đến cực là biểu hiện của quy luật
A. thống nhất.
B. địa đới.
C. đai cao.
D. địa ô. Đáp án là: B. địa đới. </s>
|
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Một con lắc đơn dao động điều hòa với phương trình li độ dài: s = 2 cos 2 πt + π 3 cm, tại nơi có gia tốc trọng trường g = 9, 8 m / s 2. Tỷ số giữa lực căng dây và trọng lực tác dụng lên quả cầu ở vị trí cân bằng là:
A. 1,08
B. 0,95
C. 1,01
D. 1,006 Đáp án là: D. 1,006 </s>
|
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1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Cho các hợp kim sau: Cu-Fe (I); Zn-Fe (II); Fe-C (III); Sn-Fe (IV). Khi tiếp xúc với dung dịch chất điện li thì các hợp kim mà trong đó Fe đều bị ăn mòn là
A. I, II và III
B. I, II và IV
C. I, III và IV
D. II, III và IV Đáp án là: C. I, III và IV </s>
|
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1,
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1,
1,
1,
1,
1,
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1,
1,
1,
1,
1,
1,
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1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Xà phòng hoá hoàn toàn 15,6 gam chất béo cần vừa đủ 0,06 mol NaOH. Cô cạn dung dịch sau phản ứng thu được khối lượng xà phòng là
A. 16,16gam
B. 18,24 gam
C. 18,38 gam
D. 16,68 gam Đáp án là: A. 16,16gam </s>
|
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<s> Chọn đáp án đúng với câu hỏi: The National _____ is set by the government and must be followed in all state schools.
A. Lesson
B. Curriculum
C. Activity
D. Certificate Đáp án là: B. Curriculum </s>
|
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1,
1,
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1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Cho hình bình hành ABCD có chiều cao hạ xuống cạnh CD là 5 cm, chiều dài CD là 15 cm, diện tích hình bình hành ABCD là:
A. 20 cm^2
B. 75 cm
C. 20 cm
D. 75 cm^2 Đáp án là: D. 75 cm^2 </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Cho hàm số y=x^4−2(m^2−m+1)x^2+m−1 với m là tham số thực. Tìm giá trị của m để đồ thị hàm số có một điểm cực đại và hai điểm cực tiểu, đồng thời khoảng cách giữa hai điểm cực tiểu ngắn nhất.
A. m=−1/2
B. m=1/2
C. m=3/2
D. m=−3/2 Đáp án là: B. m=1/2 </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Tại ba đỉnh A, B, C của một tam giác đều cạnh a = 0,15m có ba điện tích q A = 2 μ C ; q B = 8 μ C ; q C = − 8 μ C. Véc tơ lực tác dụng lên q A có độ lớn
A. F = 6,4N và hướng song song với BC
B. F = 5,9N và hướng song song với BC
C. F = 8,4N và hướng vuông góc với BC
D. F = 6,4N và hướng song song với AB Đáp án là: A. F = 6,4N và hướng song song với BC </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Biết nghiệm của hệ phương trình (1/(x)−1/(y)=13/(x)+4/(y)=5)là (x; y). Tính 9x + 2y
A. 10
B. 14
C. 11
D. 13 Đáp án là: B. 14 </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Các kiểu khí hậu nào sau đây chiếm ưu thế ở miền Đông Trung Quốc?
A. Nhiệt đới gió mùa và ôn đới gió mùa.
B. Cận nhiệt đới gió mùa và ôn đới gió mùa.
C. Ôn đới lục địa và ôn đới gió mùa.
D. Cận nhiệt đới gió mùa và ôn đới lục địa. Đáp án là: A. Nhiệt đới gió mùa và ôn đới gió mùa. </s>
|
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2,
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1,
1
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<s> Chọn đáp án đúng với câu hỏi: Find the word which has a different sound in the part underlined.
A. a nimal
B. char a cter
C. im a gine
D. person a lity Đáp án là: B. char a cter </s>
|
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2,
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] |
[
1,
1,
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1,
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1,
1,
1,
1,
1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Cho m gam H 2 NCH 2 COOH phản ứng hết với dung dịch KOH dư, thu được dung dịch chứa 84,75 gam muối. Giá trị của m là:
A. 65,55.
B. 55,65.
C. 56,25.
D. 66,75. Đáp án là: C. 56,25. </s>
|
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[
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1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Sự kiện chấm dứt sự phục hồi của nền kinh tế Nhật Bản sau chiến tranh thế giới thứ nhất là gì?
A. Cuộc bạo động lúa gạo.
B. Khủng hoảng tài chính 1927.
C. Đảng cộng sản Nhật thành lập.
D. Trận động đất ở Tô-ky-ô năm 1923. Đáp án là: B. Khủng hoảng tài chính 1927. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Hai câu thơ “Sương chùng chình qua ngõ - Hình như thu đã về” sử dụng phép tu từ nào?
A. Nhân hóa
B. Ẩn dụ
C. Hoán dụ
D. Điệp từ Đáp án là: A. Nhân hóa </s>
|
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
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1,
1,
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1,
1,
1,
1,
1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Trong 8 tháng đầu năm, một cửa hàng bán được 1 264 chiếc ti vi. Trong 4 tháng cuối năm, trung bình mỗi tháng cửa hàng bán được 164 chiếc ti vi. Hỏi trong cả năm, trung bình mỗi tháng cửa hàng đó bán được bao nhiêu ti vi? Viết biểu thức tính kết quả.
A. 656 chiếc.
B. 164 chiếc.
C. 1 920 chiếc.
D. 160 chiếc. Đáp án là: D. 160 chiếc </s>
|
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1,
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] |
<s> Chọn đáp án đúng với câu hỏi: Các biện pháp tu từ được sử dụng trong hai câu thơ cuối đoạn trích Xe vẫn chạy vì miền Nam phía trước:/ Chỉ cần trong xe có một trái tim?
A.Nhân hóa, hoán dụ
B.Ẩn dụ, hoán dụ
C.Đối, liệt kê
D.So sánh, nhân hóa Đáp án là: B.Ẩn dụ, hoán dụ </s>
|
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<s> Chọn đáp án đúng với câu hỏi: (22) ______, it has some disadvantages as well such as: it doesn't work at night, and the cost is very high because it is expensive to build solar power stations.
A. Since
B. Although
C. However
D. Untill Đáp án là: C. However </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Cho E = (-2) + (-4) + (-6) + (-8) + (-10) + 8 + 10 + 12. Phát biểu nào sau đây là đúng?
A. E = 0;
B. -2 < E < 0;
C. 2 < E < 5;
D. E = 4. Đáp án là: A. E = 0; </s>
|
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1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Read the passage and fill in the blank Ha Long Bay is a beautiful natural wonder in northern Vietnam near the Chinese border. The Bay is dotted (1) ____________ 1,600 limestone islands and islets and covers (2) ____________ area of over 1,500 sq km. This extraordinary area was declared a UNESCO World Heritage Site in 1994. For many tourists, this place is like something right out of a movie. The fact (3) ____________ that Ha Long Bay features a wide range of biodiversity, while the surrealistic scenery has indeed featured in endless movies. The best way (4) ____________ to Ha Long City is by car, minibus or bus from Hanoi which is only 170 km away. If budget is not a problem, an hour-long helicopter transfer is also available. Question 1:
A. in
B. with
C. for
D. by Đáp án là: B. with </s>
|
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<s> Chọn đáp án đúng với câu hỏi: The bleaching of coral reefs as mentioned in paragraph 4 indicates ________.
A. the slow death of coral reefs
B. the blooming phase of sea weeds
C. the quick growth of marine mammals
D. the water absorption of coral reefs Đáp án là: A. the slow death of coral reefs </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Chọn đáp án đúng điền vào chỗ trốngTrong hai phân số cùng mẫu số, phân số nào có tử số bé hơn thì.......
A. bé hơn
B. lớn hơn
C. bằng
D. không bằng Đáp án là: A. bé hơn </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Hội nghị ban chấp hành Trung ương Đảng Cộng sản Đông Dương lần thứ VIII đã xác định mâu thuẫn cơ bản trong lòng xã hội Việt Nam là
A. Mâu thuẫn giữa nhân dân ta với thực dân Pháp.
B. Mâu thuẫn giữa nhân dân ta với đế quốc (phát xít) Pháp – Nhật.
C. Mâu thuẫn giữa nhân dân ta với thực dân Pháp và phong kiến tay sai.
D. Mâu thuẫn giữa nhân dân ta với phát xít Nhật và phong kiến tay sai. Đáp án là: B. Mâu thuẫn giữa nhân dân ta với đế quốc (phát xít) Pháp – Nhật. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: I wish /can/go camping/you/ tomorrow
A. I wish I can go camping with you tomorrow.
B. I wish I can go to the camp with you tomorrow.
C. I wish I could go camping with you tomorrow.
D. I wish I could going to camp with you tomorrow. Đáp án là: C. I wish I could go camping with you tomorrow. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Cho các khẳng định sau:
(1) Hình lăng trụ đứng tứ giác có 5 mặt;
(2) Hình lăng trụ đứng tứ giác có 8 đỉnh;
(3) Hình lăng trụ đứng tứ giác có 12 cạnh;
(4) Hình lăng trụ đứng tứ giác có 5 mặt bên;
(5) Hình lăng trụ đứng tứ giác có 2 mặt đáy.
Số khẳng định sai là:
A. 5;
B. 4;
C. 3;
D. 2. Đáp án là: D. 2 </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Khi nói về điện từ trường, phát biểu nào sau đây là sai?
A. Một từ trường biến thiên theo thời gian sinh ra một điện trường xoáy.
B. Đường sức điện trường của điện trường xoáy giống như đường sức điện trường do một điện tích không đổi, đứng yên gây ra.
C. Đường sức từ của từ trường xoáy là các đường cong kín bao quanh các đường sức điện trường.
D. Một điện trường biến thiên theo thời gian sinh ra một từ trường xoáy. Đáp án là: B. Đường sức điện trường của điện trường xoáy giống như đường sức điện trường do một điện tích không đổi, đứng yên gây ra. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Overeating is a cause of several deadly diseases. Physical inactivity is another cause of several deadly diseases.
A. Not only overeating but also physical inactivity may lead to several deadly diseases.
B. Apart from physical activities, eating too much also contributes to several deadly diseases
C. Overeating and physical inactivity are caused by several deadly diseases.
D. Both overeating and physical inactivity result from several deadly diseases Đáp án là: A. Not only overeating but also physical inactivity may lead to several deadly diseases. </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Vào thời kì dậy thì trẻ em có những thay đổi mạnh về thể chất và sinh lí do cơ thể tiết ra nhiều hoocmôn
A. sinh trưởng.
B. ơstrôgen (nữ) và testostêrôn (nam).
C. tirôxin.
D. ơstrôgen (nam) và testostêrôn (nữ). Đáp án là: B. ơstrôgen (nữ) và testostêrôn (nam). </s>
|
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<s> Chọn đáp án đúng với câu hỏi: We both ______ an attempt to be friendly despite recent arguments.
A. took
B. made
C. did
D. led Đáp án là: B. made </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Choose the letter A, B, C or D to complete the passage below There is a lot of controversy surrounding the invention __________ (6) the telephone. There have been court cases, books, and articles generated about the subject. Of course, Alexander Graham Bell is the father of the telephone. After all it was his design that was first __________ (7), however, he was not the first inventor to come up __________ (8) the idea of a telephone. Antonio Meucci, an Italian immigrant, began developing the design of a talking telegraph or telephone __________ (9) 1849. In 1871, he filed a caveat (an announcement of an invention) for his design of a talking telegraph. Due to hardships, Meucci could not renew his caveat. His role in the invention of the telephone was overlooked until the United States House of Representatives __________ (10) a Resolution on June 11, 2002, honoring Meucci's contributions and work. You can read the resolution (107th Congress, H Res 269) on Congress.gov. To make matters even more interesting some researchers suggest that Elisha Gray, a professor at Oberlin College, applied for a caveat of the telephone on __________ (11) same day Bell applied for his patent of the telephone- these gentlemen didn’t actually visit the Patent Office, their lawyers did __________ (12) their behalf. In Historical First Patents: The First United States Patent for Many Everyday Things (Scarecrow Press, 1994), Travis Brown, reports that Bell’s lawyer got to the patent office first. The date was February 14, 1876. He was the fifth entry of that day, __________ (13) Gray’s lawyer was 39th. Therefore, the U.S. Patent Office ___________ (14) Bell with the first patent for a telephone, US Patent Number 174,465 rather than honor Gray's caveat. _________, (15) some authors dispute this story and suggest that there was malfeasance by certain individuals at Patent Office, and possibly Bell himself. Question 15:
A. Therefore
B. However
C. Because
D. As Đáp án là: B. However </s>
|
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2,
2
] |
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1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Hòa tan hoàn toàn 21 gam hỗn hợp 2 muối cacbonat của kim loại hóa trị I và kim loại hóa trị II bằng dung dịch HCl dư, thu được dung dịch A và 1,008 lít khí (đktc). Cô cạn dung dịch A thì thu được m gam muối khan. Giá trị của m là:
A. 24,495
B. 13,898
C. 21,495
D. 18,975 Đáp án là: A. 24,495 </s>
|
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30250,
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18916,
29901,
319,
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29871,
29906,
29946,
29892,
29946,
29929,
29945,
29871,
2,
2
] |
[
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
1,
1,
1,
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1,
1,
1,
1,
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1,
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1,
1,
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1,
1,
1,
1,
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1,
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1,
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1,
1,
1,
1,
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1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Muối nào sau đây không tan trong nước?
A. Sodium fluoride;
B. Potassium chloride
C. Silver fluoride;
D. Silver iodide. Đáp án là: D. Silver iodide </s>
|
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Các câu sau thuộc hành động nói gì? “Cảm ơn cụ, nhà cháu đã tỉnh táo như thường. Nhưng xem ý hãy còn lề bề lệt bệt chừng như vẫn mỏi mệt lắm.”
A.Hỏi
B. Trình bày
C. Điều khiển
D. Hứa hẹn Đáp án là: B. Trình bày </s>
|
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2,
2
] |
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1,
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1,
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1,
1,
1,
1,
1,
1,
1,
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1,
1,
1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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1,
1,
1,
1,
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1,
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1,
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1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Chọn câu trả lời đúng: Một bình chia độ hình trụ có độ cao tới vạch lớn nhất là 20cm và có giới hạn đo là 250 c m 3. Tiết diện của bình là:
A. 12,5 m m 2
B. 12,5 c m 2
C. 12,5 d m 2
D. 12,5 m 2 Đáp án là: B. 12,5 c m 2 </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Mark the letter A, B, C, or to indicate the word that differs from the other three in the position of primary stress in each question
A. scientist
B. consequence
C. detergent
D. influence Đáp án là: C. detergent </s>
|
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1,
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<s> Chọn đáp án đúng với câu hỏi: Trẻ nhỏ bị còi xương khi thiếu loại vitamin nào?
A. Vitamin A
B. Vitamin B
C. Vitamin C
D. Vitamin D Đáp án là: D. Vitamin D </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Việc khai thác quá mức nguồn tài nguyên nước cùng với lượng chất thải lớn đã gây ra hậu qảu nào sau đây?
A. Thoái hóa đất
B. Ô nhiễm nguồn nước
C. Ô nhiễm không khí
D. Biến đổi khí hậu Đáp án là: B. Ô nhiễm nguồn nước </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Gọi \[F\left( x \right)\] là nguyên hàm của hàm số \[f\left( x \right) = {\cos ^4}2x\] thỏa mãn \[F\left( 0 \right) = 2019\]. Giá trị của \[F\left( {\frac{\pi }{8}} \right)\] là:
A. \[\frac{{3\pi + 16153}}{{64}}\]
B. \[\frac{{3\pi + 129224}}{8}\]
C. \[\frac{{3\pi + 129224}}{{64}}\]
D. \[\frac{{3\pi - 129224}}{{32}}\] Đáp án là: C. \[\frac{{3\pi + 129224}}{{64}}\] </s>
|
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2,
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<s> Chọn đáp án đúng với câu hỏi: Phones ______ at night because this can reduce battery life.
A. shouldn’t be charged
B. can charge
C. will charge
D. has charged Đáp án là: A. shouldn’t be charged </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Thủ pháp nghệ thuật được tác giả sử dụng hiệu quả trong bài thơ “Chiều xuân” là gì?
A. Sử dụng phép đối lập
B. Sử dụng nhiều từ láy
C. Sử dụng phép tăng tiến
D. Sử dụng nhiều điệp ngữ Đáp án là: B. Sử dụng nhiều từ láy </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Bác Hồ sinh năm 1890 thuộc thế kỷ nào?
A. Thế kỷ XVII
B. Thế kỷ XVIII
C. Thế kỷ XIX
D. Thế kỷ XX Đáp án là: C. Thế kỷ XIX </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Most producers are among the rural areas and (9) _____ majority of them are very small entrepreneurs.
A. a
B. an
C. the
D. Ø Đáp án là: C. the </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Nồng độ mol của dung dịch cho biết
A. số gam dung môi có trong 100 gam dung dịch.
B. số gam chất tan có trong 100 gam dung dịch.
C. số mol chất tan có trong một lít dung dịch.
D. số mol chất tan có trong dung dịch. Đáp án là: C. số mol chất tan có trong một lít dung dịch. </s>
|
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1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1
] |
<s> Chọn đáp án đúng với câu hỏi: Cho hàm số: y = 3x – 5. Hãy cho biết giá trị của y khi x = 3.
A. 6;
B. 7;
C. 4;
D. 5. Đáp án là: C. 4; </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Đọc đoạn thơ sau và trả lời câu hỏi: Tôi muốn tắt nắng đi Cho màu đừng nhạt mất; Tôi muốn buộc gió lại Cho hương đừng bay đi. Của ong bướm này đây tuần tháng mật; Này đây hoa của đồng nội xanh rì; Này đây lá của cành tơ phơ phất; Của yến anh này đây khúc tình si; Và này đây ánh sáng chớp hàng mi, Mỗi buổi sớm, thần Vui hằng gõ cửa; Tháng giêng ngon như một cặp môi gần; (Trích Vội vàng – Xuân Diệu) Bài thơ được viết theo thể thơ nào?
A. Thất ngôn bát cú
B. Thơ lục bát
C. Thơ bảy chữ
D. Thơ tự do Đáp án là: D. Thơ tự do </s>
|
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<s> Chọn đáp án đúng với câu hỏi: He was a very active and ___(43)___in the pupils
A. tiring
B. interested
C. interesting
D. tired Đáp án là: B. interested </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Âm nghe được là sóng cơ học có tần số nằm trong khoảng:
A. 16Hz đến 2.10 4 Hz
B. 16Hz đến 20MHz
C. 16Hz đến 200KHz
D. 16Hz đến 2KHz Đáp án là: A. 16Hz đến 2.10 4 Hz </s>
|
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1,
1,
1,
1,
1,
1,
1,
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1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
1,
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<s> Chọn đáp án đúng với câu hỏi: Cho 2,8 gam CaO tác dụng với lượng nước dư thu được dung dịch A. Sục 1,68 lít khí CO 2 (đktc) vào dung dịch A thu được m gam kết tủa và dung dịch B. Đun nóng dung dịch B lại thu được m’ gam kết tủa nữa. Giá trị của m và m’ lần lượt là:
A. 2,5 và 2,5
B. 2,5 và 5,0
C. 5,0 và 5,0
D. 2,5 và 7,5 Đáp án là: A. Sục 1,68 lít khí CO 2 (đktc) vào dung dịch A thu được m gam kết tủa và dung dịch </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Someone somewhere (57)................. said that the average amount of sleep the average person wants is five minutes longer than they get
A. once
B. ago
C. past
D. prior Đáp án là: A. once </s>
|
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<s> Chọn đáp án đúng với câu hỏi: Trong một quần xã sinh vật, xét các loài sau: cỏ, thỏ, mèo rừng, hươu, hổ, vi khuẩn gây bệnh ở thỏ và sâu ăn cỏ. Trong các nhận xét sau đây về mối quan hệ giữa các loài trên, có bao nhiêu nhận xét đúng? I. Thỏ và vi khuẩn là mối quan hệ cạnh tranh khác loài. II. Mèo rừng thường bắt những con thỏ yếu hơn nên có vai trò chọn lọc đối với quần thể thỏ. III. Nếu mèo rừng bị tiêu diệt hết thì quần thể thỏ có thể tăng số lượng nhưng sau đó được điều chỉnh về mức cân bằng. IV. Hổ là vật dữ đầu bảng có vai trò điều chỉnh số lượng cá thể của quần thể trong quần xã.
A. 2
B. 3
C. 4
D. 1 Đáp án là: B. 3 </s>
|
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] |
<s> Chọn đáp án đúng với câu hỏi: The thought of going to the party without my parents really daunts me.
A. carries
B. admits
C. comforts
D. frightens Đáp án là: C. comforts </s>
|
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