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<s> Chọn đáp án đúng với câu hỏi: The words "exposed to" in paragraph 2 most likely mean _______ A. hardened by B. chilled with C. subjected to D. deprived of Đáp án là: C. subjected to </s>
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<s> Chọn đáp án đúng với câu hỏi: Tử nửa sau thế kỉ XIX, các nước Đông Nam Á đứng trước thách thức lịch sử lớn nhất là gì? A. Nguy cơ bị thực dân phương Tây xâm lược, biến thành thuộc địa B. Chế độ phong kiến lâm vào khủng hoảng, suy yếu C. Mâu thuẫn trong nước gay gắt làm bùng nổ phong trào đấu tranh chống triều đình phong kiến D. Tiềm lực quân sự, quốc phòng yếu kém đòi hỏi nguồn vốn lớn để hiện đại hóa Đáp án là: A. Nguy cơ bị thực dân phương Tây xâm lược, biến thành thuộc địa </s>
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<s> Chọn đáp án đúng với câu hỏi: Women are increasingly involved _____the public life. A. at B. with C. in D. to Đáp án là: C. in </s>
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<s> Chọn đáp án đúng với câu hỏi: Năm 1949, Trung Quốc đã A. lâm vào suy thoái, khủng hoảng nghiêm trọng về kinh tế - xã hội. B. lựa chọn con đường phát triển đất nước theo hướng tư bản chủ nghĩa. C. tiến hành cải cách mở cửa để đưa đất nước thoát khỏi khủng hoảng. D. hoàn thành thắng lợi cuộc cách mạng dân tộc dân chủ nhân dân. Đáp án là: D. hoàn thành thắng lợi cuộc cách mạng dân tộc dân chủ nhân dân </s>
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<s> Chọn đáp án đúng với câu hỏi: Quần thể ruồi nhà ở nhiều vùng nông thôn xuất hiện nhiều vào 1 khoảng thời gian nhất định trong năm (thường là mùa hè), còn vào thời gian khác nhau thì hầu như giảm hẳn. Như vậy quần thể này A. biến động số lượng theo chu kì năm B. biến động số lượng theo chu kì mùa C. biến động số lượng không theo chu kì D. không biến động số lượng Đáp án là: B. biến động số lượng theo chu kì mùa </s>
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<s> Chọn đáp án đúng với câu hỏi: Vương triều Gúpta có vai trò to lớn trong lịch sử Ấn Độ, ngoại trừ A. tổ chức các cuộc chiến đấu chống xâm lược, bảo vệ đất nước B. thống nhất lãnh thổ miền Bắc Ấn Độ C. thống nhất gần như toàn bộ miền Trung Ấn Độ D. thống nhất giữa các vùng, miền ở Ấn Độ về mặt tôn giáo Đáp án là: D. thống nhất giữa các vùng, miền ở Ấn Độ về mặt tôn giáo </s>
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<s> Chọn đáp án đúng với câu hỏi: Có các hóa chất sau đựng riêng biệt trong các lọ mất nhãn: KCl, MgCl 2, FeCl 2, FeCl 3, AlCl 3, NH 4 Cl, (NH 4 ) 2 SO 4. Thuốc thử có thể dùng để nhận biết các hóa chất trên là A. NaOH B. B a ( O H ) 2 C. B a ( N O 3 ) 2 D. AgNO 3 Đáp án là: B. B a ( O H ) 2 </s>
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<s> Chọn đáp án đúng với câu hỏi: Đun nóng 121,5 gam xenlulozơ với dung dịch H N O 3 đặc trong H N O 3 đặc (dùng dư), thu được x gam xenlulozơ trinitrat. Giá trị của x là A. 222,75 gam B. 186,75 gam C. 176,25 gam D. 129,75 gam Đáp án là: A. 222,75 gam </s>
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<s> Chọn đáp án đúng với câu hỏi: Helen and Sarah are talking about their school's field trip. Helen:"This is the best field trip we've ever had." Sarah:"_____”.Everyone enjoyed it to the fullest." A. I don't think that's a good idea B. I totally disagree C. You're right D. Never mind Đáp án là: C. You're right </s>
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<s> Chọn đáp án đúng với câu hỏi: I find it quite _______ that some people are very good at adapting to hot weather. A. amazing B. amaze C. amazement D. amazingly Đáp án là: A. amazing </s>
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<s> Chọn đáp án đúng với câu hỏi: Red Ribbon Week, a national campaign to keep young people from using drugs, ________. A. Annually in October B. annually in October each year C. takes place annually in October D. taking place annually in October Đáp án là: D. taking place annually in October </s>
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<s> Chọn đáp án đúng với câu hỏi: Phản ứng điện phân dung dịch CuCl 2 (với điện cực trơ) và phản ứng ăn mòn điện hoá xảy ra khi nhúng hợp kim Zn – Cu vào dung dịch HCl có đặc điểm giống nhau là A. Phản ứng xảy ra luôn kèm theo sự phát sinh dòng điện B. Phản ứng ở cực dương đều là sự oxi hoá Cl -. C. Ở cực dương đều tạo ra khí D. Catot đều là cực dương Đáp án là: C. Ở cực dương đều tạo ra khí </s>
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<s> Chọn đáp án đúng với câu hỏi: Phèn nhôm (phèn chua) có công thức hóa học là A. KAl(SO 4 ) 2.12H 2 O. B. B, C đều đúng. C. NaAlFe 6 D. NH 4 A1(SO 4 ) 2.12H 2 O. Đáp án là: A. KAl(SO 4 ) 2.12H 2 O. </s>
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<s> Chọn đáp án đúng với câu hỏi: Cho các polime: Tơ tằm nilon-6,6, nilon-6, nilon-7, PPF, PVA, PE. Số chất tác dụng được với dung dịch NaOH khi đun nóng là A. 3 B. 4 C. 5 D. 6 Đáp án là: D. 6 </s>
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<s> Chọn đáp án đúng với câu hỏi: Đô thị hóa tự phát ở đới nóng không có tác động nào sau đây? A. Ô nhiễm môi trường. B. Thất nghiệp, thiếu việc làm. C. Phân bố dân cư hợp lí hơn. D. Sinh ra nhiều tệ nạn xã hội. Đáp án là: C. Phân bố dân cư hợp lí hơn. </s>
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<s> Chọn đáp án đúng với câu hỏi: Cho lăng trụ tam giác ABC.A'B'C' có độ dài cạnh bên bẳng 4 và khoảng cách từ điểm A đến các đường thẳng BB', CC' lần lượt bẳng 1 và 2. Biết góc giữa hai mặt phẳng (ABB^'A^') và (ACC^'A^') bằng 60°. Thể tích khối lăng trụ ABC.A'B'C' là A. 4√(3). B. √(3). C. 3√(3). D. 2√(3). Đáp án là: D. 2√(3) </s>
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<s> Chọn đáp án đúng với câu hỏi: My sister studies very hard,...................... she always gets good marks. A. because B. so C. although D. but Đáp án là: B. so </s>
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<s> Chọn đáp án đúng với câu hỏi: Trong quá trình giảm phân ở 1 cơ thể có kiểu gen AaBbX c D X E d đã xảy ra hoán vị gen giữa các alen D và d với tần số 20%. Cho biết không xảy ra đột biến, tính theo lí thuyết, tỉ lệ loại giao tử abX c d được tạo ra từ cơ thể này là A. 2,5% B. 5,0% C. 10,0% D. 7,5% Đáp án là: A. 2,5% </s>
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<s> Chọn đáp án đúng với câu hỏi: Hợp chất hữu cơ X có công thức phân tử là C 8 H 6 O 4, trong phần tử có chứa vòng benzen. Lấy 1 mol X tác dụng với dung dịch AgNO 3 /NH 3 đun nóng (dư) thu được 4 mol Ag. Đun nóng 1 mol X với dung dịch chứa 4 mol NaOH loãng, cô cạn dung dịch sau phản ứng, thu được m gam rắn. Giá trị của m là: A. 272. B. 308. C. 290. D. 254. Đáp án là: C. 290. </s>
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<s> Chọn đáp án đúng với câu hỏi: Nhằm thủ tiêu những tàn tích của chế độ phong kiến, đem lại các quyền tự do, dân chủ cho nhân dân, ngày 26/10/1917 (theo lịch Nga), Chính quyền Nga Xô viết đã A. thông qua Chính sách kinh tế mới do Lê-nin soạn thảo. B. phát động cuộc đấu tranh chống thù trong, giặc ngoài. C. ban hành Sắc lệnh Hòa bình và Sắc lệnh Ruộng đất. D. ban hành Chính sách Cộng sản thời chiến. Đáp án là: C. ban hành Sắc lệnh Hòa bình và Sắc lệnh Ruộng đất. </s>
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<s> Chọn đáp án đúng với câu hỏi: Đọc đoạn trích sau và trả lời các câu hỏi: Ấy là Huy Cận đó - nhưng một thi sĩ "thiên nhiên" như chàng thì ở nơi nào chẳng được, ở thời nay cũng như ở thời xưa; chàng như không ở trong thời gian mà chỉ ở trong không gian; người ta muốn tưởng linh hồn Huy Cận là đám mây kia, là nỗi hắt hiu trong cõi trời, là hương gió nhớ thương... Trong thơ Việt Nam, nghe bay dậy một tiếng địch buồn. Không phải sáo Thiên Thai, không phải điệu ái tình, không phải lời li tao kể chuyện một cái "tôi"; mà ấy là một bản ngậm ngùi dài : có tiếng đìu hiu của khóm trúc, bông lau ; có phải niềm than vãn của bờ sông, bãi cát ; có phải mặt trăng một mình đang cảm thương cùng các vì sao? (Xuân Diệu, Lời tựa cho tập Lửa thiêng, NXB Hội Nhà văn, Hà Nội, 1995) Những từ ngữ in đậm trong đoạn trích trên có tác dụng biểu hiện cảm xúc của người viết như thế nào? A. Cách dùng từ in đậm vừa giàu hình tượng biểu cảm. Những hình ảnh được nhắc đến rất cụ thể sinh động, giàu chất thơ nhưng lại mang tính ẩn dụ, khái quát cao. B. Cách dùng từ in đậm vừa giàu hình tượng biểu cảm, mang nghĩa tường minh và hàm ý sâu sắc. C. Cách dùng từ in đậm miêu tả cụ thể được từng hình ảnh mà tác giả đã đề cập tới. D. Tất cả các ý trên đều đúng. Đáp án là: A. Cách dùng từ in đậm vừa giàu hình tượng biểu cảm. Những hình ảnh được nhắc đến rất cụ thể sinh động, giàu chất thơ nhưng lại mang tính ẩn dụ, khái quát cao. </s>
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<s> Chọn đáp án đúng với câu hỏi: Duong and Daisy are talking about Duong's IELTS test. - Duong: “I'm taking my IELTS test tomorrow.” - Daisy: “____________” A. Good job B. Good luck C. Good fortune D. Good outcome Đáp án là: B. Good luck </s>
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<s> Chọn đáp án đúng với câu hỏi: Khi cho giấy quỳ tím ẩm vào bình chứa khí amoniac thì giấy quỳ A. chuyển sang màu đỏ. B. mất màu. C. chuyển sang màu xanh. D. không chuyển màu. Đáp án là: C. chuyển sang màu xanh. </s>
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<s> Chọn đáp án đúng với câu hỏi: “She is an excellent actress!” “You _____ again!” A. can say that B. may say it C. say it D. say that Đáp án là: A. can say that </s>
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<s> Chọn đáp án đúng với câu hỏi: All _____ must complete a visa form upon arrival at Singapore airport. A. tourists B. departures C.customers D. passengers Đáp án là: D. passengers </s>
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<s> Chọn đáp án đúng với câu hỏi: Cho các chất: H 2 N − ( C H 2 ) 4 − C H ( N H 2 ) − C O O H, ( C H 3 ) 2 C H − C H ( N H 2 ) − C O O H, H 2 N − C H 2 − C O O H, H 2 N − ( C H 2 ) 2 − C H ( N H 2 ) − C O O H. Số chất làm quỳ tím đổi thành màu xanh? A. 1 B. 2 C. 3 D. 4 Đáp án là: C. 3 </s>
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<s> Chọn đáp án đúng với câu hỏi: one in five youngsters (30) ________ anything between A. Puts B. Gets C. brings D. makes Đáp án là: B. Gets </s>
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<s> Chọn đáp án đúng với câu hỏi: Thủy phân hoàn toàn 143,45 gam hỗn hợp A gồm hai tetrapeptit thu được 159,74 gam hỗn hợp X gồm các amino axit (các amino axit đều chỉ chứa 1 nhóm -COOH và 1 nhóm - N H 2 ). Cho toàn bộ X tác dụng với dung dịch HCl dư, sau đó cô cạn dung dịch thì nhận được m gam muối khan. Khối lượng nước phản ứng và giá trị của m lần lượt là: A. 8,145 và 203,78. B. 32,58 và 10,15. C. 16,2 và 203,78. D. 16,29 và 203,78. Đáp án là: D. 16,29 và 203,78 </s>
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<s> Chọn đáp án đúng với câu hỏi: I always learn _______ lot of things at school. A. a B. much C. many D. so Đáp án là: A. a </s>
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<s> Chọn đáp án đúng với câu hỏi: Chọn thêm một thuốc thử để nhận biết các dung dịch chứa trong lọ riêng đã mất nhãn: Ba(OH) 2, NaOH, H 2 SO 4, HNO 3 A. HCl. B. HNO 3 C. H 3 PO 4 D. H 2 SO 4. Đáp án là: C. H 3 PO 4 </s>
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<s> Chọn đáp án đúng với câu hỏi: Biến đổi nào của khu vực Đông Bắc Á sau chiến tranh thế giới thứ hai đã góp phần làm thay đổi bản đồ địa chính trị thế giới A. Hàn Quốc, Hồng Công, Đài Loan trở thành con rồng kinh tế Châu Á B. Nhật Bản trở thành nền kinh tế lớn thứ hai thế giới C. Nước Cộng hoà nhân dân Trung Hoa ra đời, đi theo con đường xã hội chủ nghĩa D. Hàn Quốc trở thành con rồng kinh tế của Châu Á Đáp án là: C. Nước Cộng hoà nhân dân Trung Hoa ra đời, đi theo con đường xã hội chủ nghĩa </s>
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<s> Chọn đáp án đúng với câu hỏi: Bạn An lấy ngẫu nhiên một viên bi trong hộp bi có chứa 5 viên bi đỏ và 1 viên bi xanh có cùng kích thước. Cho các biến cố sau: A: “An lấy được viên bi màu đỏ”; B: “ An lấy được viên bi màu trắng”; C: “An lấy được viên bi màu xanh hoặc màu đỏ”. Phát biểu đúng là: A. Biến cố A là biến cố ngẫu nhiên; B. Biến cố B là biến cố không thể; C. Biến cố C là biến cố chắc chắn; D. Cả A, B, C đều đúng. Đáp án là: D. Cả A, B, C đều đúng </s>
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<s> Chọn đáp án đúng với câu hỏi: My new sofa is....... than the old one. A. more comfortable B. comfortably C. more comfortabler D. comfortable Đáp án là: A. more comfortable </s>
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<s> Chọn đáp án đúng với câu hỏi: Kết quả của phép nhân 45 × 11 là: A. 90; B. 195; C. 495; D. 594. Đáp án là: C. 495; </s>
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<s> Chọn đáp án đúng với câu hỏi: Ông được nhà nước phong tặng giải thưởng Hồ Chí Minh về văn học nghệ thuật đợt I năm bao nhiêu? A. 1995 B. 1996 C. 1997 D. 1998 Đáp án là: B. 1996 </s>
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<s> Chọn đáp án đúng với câu hỏi: Hãy sắp xếp các axit dưới đây theo tính axit giảm dần: CH 3 COOH, C 2 H 5 COOH, CH 3 CH 2 CH 2 COOH 3, ClCH 2 COOH 4, FCH 2 COOH 5 A. 5 > 1 > 4 > 3 > 2 B. 1 > 5 > 4 > 2 > 3 C. 5 > 1 > 3 > 4 > 2 D. 5 > 4 > 1 > 2 > 3 Đáp án là: D. 5 > 4 > 1 > 2 > 3 </s>
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<s> Chọn đáp án đúng với câu hỏi: Hội nghị BCH Trung ương Đảng Cộng sản Đông Dương lần thứ 6 đặt dưới sự chủ trì của Tổng Bí thư A. Phan Đăng Lưu. B. Lê Hồng Phong. C. Hà Huy Tập. D. Nguyễn Văn Cừ. Đáp án là: D. Nguyễn Văn Cừ </s>
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<s> Chọn đáp án đúng với câu hỏi: Phân số nào bằng 3/7 : A. 28/49 B. 30/56 C. 36/84 D. 15/42 Đáp án là: C. 36/84 </s>
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<s> Chọn đáp án đúng với câu hỏi: Chọn đáp án đúng điền vào ô trống:Tính bằng cách thuận tiện: (52×36)/(26×18)=(...)/(...) A. 2/1 B. 2/4 C. 1/4 D. 4/1 Đáp án là: D. 4/1 </s>
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<s> Chọn đáp án đúng với câu hỏi: Teenagers enjoy............... to music and............... out with friends. A. listen – hang B. to listen – to hang C. listening – hang D. listening – hanging Đáp án là: D. listening – hanging </s>
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<s> Chọn đáp án đúng với câu hỏi: Phần lớn lãnh thổ châu Phi có khí hậu A. ấm khô B. nóng ẩm C. khô nóng D. lạnh khô Đáp án là: C. khô nóng </s>
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<s> Chọn đáp án đúng với câu hỏi: 2m 5cm =..... cm. A. 250 B. 205 C. 25 D. 2500 Đáp án là: B. 205 </s>
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<s> Chọn đáp án đúng với câu hỏi: I.Choose the word that has the underlined part pronounced differently from the others. A. deli c ious B. spe c ial C. recy c le D. physi c ian Đáp án là: C. recy c le </s>
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<s> Chọn đáp án đúng với câu hỏi: Thuận lợi căn bản nhất được tạo ra từ hiệp định Pari năm 1973 giúp nhân dân Việt Nam tiến lên giải phóng hoàn toàn miền Nam là gì? A. Mĩ công nhận các quyền dân tộc cơ bản của Việt Nam B. Chính quyền Việt Nam Cộng hòa đồng ý thương lượng để thống nhất đất nước C. Mĩ rút quân khỏi miền Nam Việt Nam, cam kết không can thiệp trở lại D. Miền Bắc Việt Nam được hoàn toàn giải phóng Đáp án là: C. Mĩ rút quân khỏi miền Nam Việt Nam, cam kết không can thiệp trở lại </s>
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<s> Chọn đáp án đúng với câu hỏi: Hòa tan hết 23,76 gam hỗn hợp X gồm FeCl 2 ; Cu và Fe(NO 3 ) 2 vào 400 ml dung dịch HCl 1M thu được dung dịch Y. Cho từ từ dung dịch chứa AgNO 3 1M vào Y đến các phản ứng hoàn thấy đã dùng 580ml, kết thúc thu được m gam kết tủa và thoát ra 0,448 lít khí (ở đktc). Biết NO là sản phẩm khử duy nhất của N +5 trong cả quá trình, giá trị của m gần nhất với A. 82. B. 80 C. 84. D. 86. Đáp án là: A. 82. </s>
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<s> Chọn đáp án đúng với câu hỏi: Choose the sentence A, B, C or D which in closest in meaning to the printed sentence. A picture was stolen by art thieves. It was painted by Munch. A. Stolen by art thieves, a picture was painted by Munch. B. Painted by Munch, a picture was stolen by art thieves. C. A picture painted by Munch was stolen by art thieves. D. All are correct. Đáp án là: C. A picture painted by Munch was stolen by art thieves. </s>
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<s> Chọn đáp án đúng với câu hỏi: Mary: "Would you mind lending me your pencil?" - John : "........................................................................................................................................ " A. Not at all B. Yes, here it is C. Yes, let's D. Great Đáp án là: A. Not at all </s>
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<s> Chọn đáp án đúng với câu hỏi: I'd be over the moon if I ___________ a chance to go to Disneyland in California. A. have B. had C. will have D. would have Đáp án là: B. had </s>
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<s> Chọn đáp án đúng với câu hỏi: Trong quá trình dao động của một con lắc đơn thì tại vị trí cân bằng A. động năng đạt giá trị cực đại B. thế năng đạt giá trị cực đại C. cơ năng bằng không D. thế năng bằng động năng Đáp án là: A. động năng đạt giá trị cực đại </s>
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<s> Chọn đáp án đúng với câu hỏi: Câu nào sau đây đúng? A. Nếu không có lực tác dụng vào vật thì vật không thể chuyển động được. B. Không cần có lực tác dụng vào vật thì vật vẫn chuyển động tròn đều được. C. Lực là nguyên nhân duy trì chuyển đọng của một vật. D. Lực là nguyên nhân biến đổi chuyển động của một vật. Đáp án là: D. Lực là nguyên nhân biến đổi chuyển động của một vật </s>
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<s> Chọn đáp án đúng với câu hỏi: Việc ghép song song các nguồn điện giống nhau thì có được bộ nguồn có A. suất điện động lớn hơn các nguồn có sẵn. B. suất điện động nhỏ hơn các nguồn có sẵn. C. điện trở trong nhỏ hơn các nguồn có sẵn. D. suất điện động bằng điện trở mạch ngoài. Đáp án là: C. điện trở trong nhỏ hơn các nguồn có sẵn. </s>
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<s> Chọn đáp án đúng với câu hỏi: Nếu chiều cao và cạnh đáy của một hình chóp tứ giác đều cùng tăng lên 3 lần thì thể tích của nó cũng tăng lên A. 18 lần. B. 27 lần. C. 54 lần. D. 9 lần Đáp án là: B. 27 lần. </s>
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<s> Chọn đáp án đúng với câu hỏi: Một đoạn dây dẫn thẳng MN dài có dòng điện I=5A đặt trong từ trường đều có cảm ứng từ B=0,5T. Lực từ tác dụng lên đoạn dây có độ lớn F = 7, 5.10 - 2 N Tính góc a hợp bởi dây MN và đường cảm ứng từ? A. 30 độ B. 60 độ C. 45 độ D. 90 độ Đáp án là: A. 30 độ </s>
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<s> Chọn đáp án đúng với câu hỏi: Một ứng dụng khá quen thuộc của hiện tượng sóng dừng trên một sợi dây đàn hồi là: A. đo chu kì sóng. B. đo tốc độ truyền sóng. C. đo năng lượng sóng D. đo pha dao động. Đáp án là: B. đo tốc độ truyền sóng. </s>
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<s> Chọn đáp án đúng với câu hỏi: Bộ tụ điện gồm hai tụ điện: C 1 = 20 (μF), C 2 = 30 (μF) mắc nối tiếp với nhau, rồi mắc vào hai cực của nguồn điện có hiệu điện thế U = 60 (V). Điện tích của mỗi tụ điện là: A. Q 1 = 3.10 - 3 (C) và Q 2 = 3.10 - 3 (C). B. Q 1 = 1,2.10 - 3 (C) và Q 2 = 1,8.10 - 3 (C). C. Q 1 = 1,8.10 - 3 (C) và Q 2 = 1,2.10 - 3 (C) D. Q 1 = 7,2.10 - 4 (C) và Q 2 = 7,2.10 - 4 (C). Đáp án là: D. Q 1 = 7,2 </s>
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<s> Chọn đáp án đúng với câu hỏi: Trong phóng xạ P 84 210 o → X + H 2 4 e, hạt nhân X có A. 84 proton và 126 notron. B. 126 proton và 84 notron. C. 124 proton và 82 notron. D. 82 proton và 124 notron. Đáp án là: D. 82 proton và 124 notron </s>
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<s> Chọn đáp án đúng với câu hỏi: Dựa vào đặc điểm có hay không có màng phospholipid kép, virus được chia làm 2 loại là A. virus trần và virus có màng bọc. B. virus DNA và virus RNA. C. virus ở thực vật và virus ở động vật. D. virus trần và virus DNA. Đáp án là: A. virus trần và virus có màng bọc. </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. I hardly know the truth about Jean’s success in the institute. A. Jean’s success in the institute was not to be known. B. It is difficult for Jean to be successful in the institute. C. I do not know much about Jean’s success in the institute. D. Jean hardly become known and successful in the institute. Đáp án là: C. I do not know much about Jean’s success in the institute. </s>
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<s> Chọn đáp án đúng với câu hỏi: Đa thức b^5 + b^3 + b + b^4 + b^2 + 1 được viết thành A. (b^2 + b – 1)(b + 1)(b^2 – b + 1); B. (b^2 + b – 1)(b – 1)(b^2 – b + 1); C. (b^2 + b + 1)(b + 1)(b^2 – b + 1); D. (b^2 + b + 1)(b – 1)(b^2 + b – 1). Đáp án là: C. (b^2 + b + 1)(b + 1)(b^2 – b + 1); </s>
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<s> Chọn đáp án đúng với câu hỏi: Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions. The Forbidden City is the former imperial palace in the center of Beijing, China. Construction began in 1406, and the emperor's court officially moved in by 1420. The Forbidden City got its name because most people were barred from entering the 72-hectare site, surrounded by walls. Even government officials and the imperial family were permitted only limited access. Only the emperor could enter any section at will. The architecture of the Forbidden City conforms rigidly to traditional Chinese principles. All buildings within the walls follow a north-south line and the most important ones face south to honor the sun. The designers arranged the other buildings, and the ceremonial spaces between them, to impress all visitors with the great power of the Emperor, while reinforcing the insignificance of the individual. This architectural concept was carried out to the smallest detail. For example, the importance of a building was determined not only by its height or width but also by the style of its roof and the quantity of statuettes placed on the roof‟s ridges. In recognition of the importance of its unparalleled architecture, UNESCO added the palace to its World Heritage List in 1987. Today, visitors from all over the world do not wait for an imperial invitation to walk about this palace, now a museum of imperial art. One of the most impressive landmarks of the Forbidden City is the Meridian Gate, the formal entrance to the southern side of the Forbidden City. The gate, with its auxiliary wings on either side of the entryway, is 38 meters high at its roof ridge. When you stand in front of this majestic structure, you understand how awed people felt when they stood there listening to imperial proclamations. As you walk through the gate, you come into a large courtyard, 140 meters long and 210 meters wide. Running through the courtyard is the Golden River, which is crossed by five parallel white marble bridges. These bridges lead to the Gate of Supreme Harmony, which, in turn, leads to the heart of the Forbidden City. At the northernmost end of the Forbidden City is the Imperial Garden, which is totally different from the rest of the compound. Instead of rigid formality, you see a seemingly spontaneous According to the passage, what do the bridges over the Golden River lead to? A. The Meridian gate B. The Gate of Supreme Harmony C. The Imperial Gardens D. The center of Beijing arrangement of trees, fishponds, flowerbeds, and sculpture. Here is the place of relaxation for the emperor. Đáp án là: A. The Meridian gate </s>
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<s> Chọn đáp án đúng với câu hỏi: Ancol etylic được điều chế từ tinh bột bằng phương pháp lên men với hiệu suất toàn bộ quá trình là 90%. Hấp thụ toàn bộ lượng CO 2 sinh ra khi lên men m gam tinh bột vào nước vôi trong thu được 330 gam kết tủa và dung dịch X. Biết khối lượng X giảm đi so với khối lượng nước vôi trong ban đầu là 132 gam. Giá trị của m là: A. 324 B. 405 C. 364,5 D. 328,1 Đáp án là: B. 405 </s>
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<s> Chọn đáp án đúng với câu hỏi: Cho Cu vào dung dịch H 2 SO 4 loãng tác dụng với chất X ( một loại phân bón hóa học ), thấy thoát ra khí không màu hóa rắn trong không khí. Mặt khác, khi X tác dụng với dung dịch NaOH thì cố mùi khai thoát ra. Chất X là A. amophot B. urê C. natri nitrat D. amoni nitrat. Đáp án là: B. urê </s>
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<s> Chọn đáp án đúng với câu hỏi: Nhân vật trữ tình của bài thơ Mây và sóng là: A. Mây B. Sóng C. Em bé D. Mẹ Đáp án là: C. Em bé </s>
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<s> Chọn đáp án đúng với câu hỏi: Một nhà máy phát điện gồm n tổ máy, mỗi tổ máy có cùng công suất P. Điện sản xuất ra được truyền đến nơi tiêu thụ với hiệu suất H. Hỏi nếu khi chỉ còn một tổ máy thì hiệu suất H’ bằng bao nhiêu (tính theo n và H) A. H ' = H n B. H' = H C. H ' = n + H - 1 n D. H' = nH Đáp án là: C. H ' = n + H - 1 n </s>
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<s> Chọn đáp án đúng với câu hỏi: Khi nói về mối quan hệ giữa sinh vật chủ - sinh vật kí sinh và mối quan hệ con mồi - sinh vật ăn thịt, phát biểu nào sau đây đúng? A. Sinh vật kí sinh có kích thước cơ thể nhỏ hơn sinh vật chủ. B. Sinh vật kí sinh bao giờ cũng có số lượng cá thể ít hơn sinh vật chủ. C. Sinh vật ăn thịt bao giờ cũng có số lượng cá thể nhiều hơn con mồi. D. Mối quan hệ sinh vật chủ - sinh vật kí sinh là nhân tố duy nhất gây ra hiện tượng khống chế sinh học Đáp án là: A. Sinh vật kí sinh có kích thước cơ thể nhỏ hơn sinh vật chủ. </s>
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<s> Chọn đáp án đúng với câu hỏi: Trong các bazơ sau: NaOH, Ca(O H ) 2, Mg(O H ) 2, Fe(O H ) 2, Fe(O H ) 3 các bazơ bị phân hủy bởi nhiệt là? A. Ca(OH ) 2, Mg(O H ) 2, Fe(OH ) 2 B. NaOH,Ca(O H ) 2, Mg(O H ) 2 C. Mg(O H ) 2, Fe(O H ) 2, Fe(O H ) 3 D. Ca(O H ) 2, Mg(O H ) 2, Fe(O H ) 3 Đáp án là: C. Mg(O H ) 2, Fe(O H ) 2, Fe(O H ) 3 </s>
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<s> Chọn đáp án đúng với câu hỏi: I’m too tired to walk home. I think I ___________ a taxi. A. will get B. am getting C. am going to get D. get Đáp án là: A. will get </s>
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<s> Chọn đáp án đúng với câu hỏi: Trong phương trình phản ứng hạt nhân A + B → C + D; gọi m 0 = m A + m B, m = m C + m D là tổng khối lượng nghỉ của các hạt nhân tương tác và tổng khối lượng nghỉ của các hạt nhân sản phẩm. Phản ứng hạt nhân là tỏa năng lượng khi: A. m > m 0 B. m < m 0 C. m = m 0 D. m = 2m 0 Đáp án là: D. m = 2m 0 </s>
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<s> Chọn đáp án đúng với câu hỏi: Đặt điện áp u = U 2 cos ω t + φ (U và u) không đổi) vào hai đầu đoạn mạch A B. Hình bên là sơ đồ mạch điện và một phần đồ thị biểu diễn sự phụ thuộc của điện áp u M B giữa hai điểm M, B theo thời gian t khi K mở và khi K đóng. Biết điện trở R = 2r. Giá trị của U là A. 193,2 V. B. 187,1 V. C. 136,6 V D. 122,5V Đáp án là: D. 122,5V </s>
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<s> Chọn đáp án đúng với câu hỏi: Nhận định nào sau đây không đúng về mùa nóng và mùa lạnh ở Bán cầu Bắc? A. Thời gian mùa nóng là 186 ngày B. Thời gian mùa lạnh là 179 hoặc 180 ngày (năm nhuận) C. Mùa nóng ngày dài hơn đêm và mùa lạnh thì ngược lại D. Chênh lệch thời gian giữa mùa nóng và mùa lạnh là 9 – 10 ngày Đáp án là: D. Chênh lệch thời gian giữa mùa nóng và mùa lạnh là 9 – 10 ngày </s>
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<s> Chọn đáp án đúng với câu hỏi: Please don't _________ a word of this to anyone else, it's highly confidential. A. breathe B. speak C. pass D. mutter Đáp án là: A. breathe </s>
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<s> Chọn đáp án đúng với câu hỏi: Oxi hóa 0,16 mol một ancol đơn chức, thu được hỗn hợp X gồm 1 axit cacboxylic, 1 anđehit, ancol dư và H 2 O. Ngưng tụ toàn bộ X rồi chia làm 2 phần bằng nhau. Ph ầ n 1 cho tác dụng hết với Na dư, thu được 1,008 lit khí H 2 (đktc). Phần 2 cho phản ứng tráng bạc hoàn toàn thu được 19,44 gam Ag. Phần trăm khối lượng ancol bị oxi hóa là A. 31,25%. B. 62,5%. C. 40%. D. 15%. Đáp án là: B. 62,5%. </s>
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<s> Chọn đáp án đúng với câu hỏi: (Câu 10 Đề thi Thử nghiệm 2017): Hai dao động điều hòa cùng phương, cùng tần số được gọi là hai dao động ngược pha nếu độ lệch pha của chúng bằng A. π 2 + k π 4 v ớ i k ∈ Z B. π 2 + 2 k π v ớ i k ∈ Z C. π + 2 k π v ớ i k ∈ Z D. π + k π 4 v ớ i k ∈ Z Đáp án là: C. π + 2 k π v ớ i k ∈ Z </s>
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<s> Chọn đáp án đúng với câu hỏi: Cho các trường hợp có lực điện từ tác dụng sau đây: Các trường hợp có lực điện từ nằm ngang hướng sang trái trên hình vẽ gồm: A. c, d. B. a, b. C. a. D. Không có. Đáp án là: B. a, b. </s>
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<s> Chọn đáp án đúng với câu hỏi: Khi nói về ưu thế lai, có bao nhiêu phát biểu sau đây không đúng? (1) Ưu thế lai biểu hiện cao nhất ở đời F 1, sau đó giảm dần qua các thế hệ. (2) Ở con lai, ưu thế lai cao hay thấp không phụ thuộc vào trạng thái dị hợp tử về nhiều cặp gen khác nhau. (3) Khi lai giữa 2 cá thể thuộc cùng 1 dòng thuần chủng luôn cho con lai có ưu thế lai. (4) Khi lai giữa 2 dòng thuần chủng có kiểu gen khác nhau, phép lai thuận có thể không co ưu thế lai nhưng phép lai nghịch lại có thể cho ưu thế lai và ngược lại. (5) Các con lai F 1 có ưu thế lai luôn được giữ lại làm giống. A. 1 B. 2 C. 3 D. 4 Đáp án là: C. 3 </s>
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<s> Chọn đáp án đúng với câu hỏi: Em bé trong bài Mây và sóng có nhu cầu gì khi nói rằng Nhưng làm thế nào mình lên đó được? A. Muốn đi chơi cùng mây. B. Muốn đi chơi cùng mây và cùng mẹ. C. Không muốn đi chơi mà ờ nhà với mẹ dù rất muốn đi. D. Ý A và B là ý đúng. Đáp án là: C. Không muốn đi chơi mà ờ nhà với mẹ dù rất muốn đi. </s>
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<s> Chọn đáp án đúng với câu hỏi: Tỉ số và tỉ số phần trăm của số 12kg và 0,3 tạ lần lượt là: A. 2/5;40% B. 2/5;45% C. 1/2;45% D. 9/2;40% Đáp án là: A. 2/5;40% </s>
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<s> Chọn đáp án đúng với câu hỏi: Tỉ lệ phần trăm của môn Cầu lông là: A. 11%; B. 28%; C. 12%; D. 49%. Đáp án là: B. 28%; </s>
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<s> Chọn đáp án đúng với câu hỏi: Mạch điện nào sau đây có hệ số công suất lớn nhất? A. Điện trở thuần R 1 nối tiếp với điện trở thuần R 2. B. Điện trở thuần R nối tiếp với cuộn cảm L. C. Điện trở thuần R nối tiếp với tụ điện C. D. Cuộn cảm L nối tiếp với tụ điện C. Đáp án là: A. Điện trở thuần R 1 nối tiếp với điện trở thuần R 2. </s>
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<s> Chọn đáp án đúng với câu hỏi: H 3 PO 4 là axit A. có tính oxi hoá mạnh. B. có tính oxi hoá yếu. C. không có tính oxi hoá mạnh. D. vừa có tính oxi hoá vừa có tính khử. Đáp án là: C. không có tính oxi hoá mạnh. </s>
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<s> Chọn đáp án đúng với câu hỏi: Trên cơ sở phân tích tình hình nước ta sau Cách mạng tháng Tám, ngày 25-11-1945, Trung ương Đảng đã đề ra A. Chỉ thị “Nhật- Pháp bắn nhau và hành động của chúng ta”. B. quyết định cải tổ Ủy ban Dân tộc giải phóng thành Chính phủ lâm thời C. Chỉ thị thành lập Chính phủ Liên hiệp kháng chiến. D. Chỉ thị “Kháng chiến, kiến quốc”. Đáp án là: D. Chỉ thị “Kháng chiến, kiến quốc” </s>
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<s> Chọn đáp án đúng với câu hỏi: Dung dịch nào sau đây phản ứng với dung dịch HCl dư tạo ra chất khí? A. Na 2 CO 3 B. Ca(NO 3 ) 2 C. K 2 SO 4 D. Ba(OH) 2 Đáp án là: A. Na 2 CO 3 </s>
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<s> Chọn đáp án đúng với câu hỏi: Chuyển dịch cơ cấu kinh tế trong nội bộ ngành công nghiệp nước ta là: A. tăng tỉ trọng công nghiệp chế biến. B. giảm tỉ trọng sản phẩm cao cấp. C. tăng tỉ trọng công nghiệp khai thác D. tăng tỉ trọng sản phẩm chất lượng trung bình. Đáp án là: A. tăng tỉ trọng công nghiệp chế biến. </s>
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<s> Chọn đáp án đúng với câu hỏi: "Thời cơ ngàn năm có một" trong Cách mạng tháng Tám tồn tại trong thời gian nào? A. Từ khi Mĩ ném bom nguyên tử xuống Hirôsima và Nagaxaki của Nhật. B. Từ khi Chiến tranh thế giới hai kết thúc ở châu Âu (5/1945). C. Sau khi Nhật đầu hàng Đồng minh đến lúc Pháp nổ súng xâm lược Việt Nam lần hai. D. Từ khi Nhật đầu hàng Đồng minh đến trước khi quân Đồng minh vào giải giáp quân Nhật. Đáp án là: D. Từ khi Nhật đầu hàng Đồng minh đến trước khi quân Đồng minh vào giải giáp quân Nhật </s>
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<s> Chọn đáp án đúng với câu hỏi: Một quần thể động vật, AA quy định lông đen; Aa quy định lông vàng; aa quy định lông trắng. Thế hệ xuất phát của quần thể có 0,25AA : 0,5Aa : 0,25aa. Theo lí thuyết, có bao nhiêu phát biểu sau đây đúng? I. Nếu các cá thể có cùng màu lông mới giao phối với nhau thì sẽ làm thay đổi tần số alen và tỉ lệ kiểu hình của quần thể. II. Nếu các con đực lông đen không có khả năng sinh sản, các cá thể khác sinh sản bình thường thì tần số alen a có thể sẽ giảm dần. III. Nếu quần thể có thêm alen mới thì có thể đã chịu tác động của các yếu tố ngẫu nhiên. IV. Nếu có một nhóm cá thể lông trắng di cư khỏi quần thể thì sẽ làm tăng tần số alen A của quần thể. A. 4 B. 1 C. 2 D. 3 Đáp án là: B. 1 </s>
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<s> Chọn đáp án đúng với câu hỏi: Một vật được ném ngang với vận tốc v 0 → từ độ cao h so với mặt đất ở nơi có gia tốc rơi tự do g. Phương trình quỹ đạo của vật là: A. x = v 0 t B. y = 1 2 g t 2 C. y = g 2 v 0 2 x 2 D. A và B Đáp án là: C. y = g 2 v 0 2 x 2 </s>
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<s> Chọn đáp án đúng với câu hỏi: Quốc tế thứ nhất được thành lập vào thời gian nào? Ở đâu? A. Ngày 29-8-1864, Quốc tế thứ nhất thành lập. Tại Luân Đôn (Anh) B. Ngày 20-9-1864, Quốc tế thứ nhất thành lập. Tại Pa-ri (Pháp) C. Ngày 28-9-1864, Quốc tế thứ nhất thành lập. Tại Luân Đôn (Anh) D. Ngày 28-9-1864, Quốc tế thứ nhất thành lập. Tại Béc-lin (Đức) Đáp án là: C. Ngày 28-9-1864, Quốc tế thứ nhất thành lập. Tại Luân Đôn (Anh) </s>
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<s> Chọn đáp án đúng với câu hỏi: Mạch điện xoay chiều chỉ có tụ điện với điện dung C. Đặt vào hai đầu tụ điện một điện áp xoay chiều có biểu thức u = U 0 cos(ωt + φ) V. Cường độ dòng điện tức thời của mạch có biểu thức là A. i = U 0 C ω cos ω t + φ - π 2 A B. i = U 0 C ω cos ω t + φ - π 2 A C. i = U 0 C ω. cos ω t + φ + π 2 A D. i = U 0 C ω cos ω t + φ + π 2 A Đáp án là: C. Đặt vào hai đầu tụ điện một điện áp xoay chiều có biểu thức u = U 0 cos(ωt + φ) V. Cường độ dòng điện tức thời của mạch có biểu thức làA. i = U 0 C ω cos ω t + φ - π 2 AB. i = U 0 C ω cos ω t + φ - π 2 A </s>
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<s> Chọn đáp án đúng với câu hỏi: The English Speaking test was....... than I thought it would be. A. the easier B. more easy C. easiest D. easier Đáp án là: D. easier </s>
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<s> Chọn đáp án đúng với câu hỏi: Đâu là giá trị nghệ thuật của truyện? A. Xây dựng hình tượng quen thuộc, gần gũi B. Tình huốn bất ngờ, hài hước C. Cách nói ẩn dụ, tự nhiên kết hợp hình ảnh đặc sắc D. Tất cả đáp án trên Đáp án là: D. Tất cả đáp án trên </s>
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<s> Chọn đáp án đúng với câu hỏi: diện tích đất canh tác bình quân theo đầu người của nước ta có xu hướng giảm dần chủ yếu là do A. khả năng mở rộng diện tích không còn nhiều trong khi dân số không ngừng tăng. B. dân số tăng nhanh, nguồn lao động dồi dào. C. đất chuyên dùng và đất thổ cư ngày càng mở rộng. D. chính sách giảm tỉ trọng trong ngành nông nghiệp cơ cấu kinh tế. Đáp án là: A. khả năng mở rộng diện tích không còn nhiều trong khi dân số không ngừng tăng. </s>
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<s> Chọn đáp án đúng với câu hỏi: Một điện tích chuyển động trong điện trường theo một đường cong kín. Gọicông của lực điện trong chuyến động đó là A thì A. A > 0 nếu q > 0. B. A > 0 nếu q < 0. C. A > 0 nếu q < 0 D. A = 0 Đáp án là: D. A = 0 </s>
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<s> Chọn đáp án đúng với câu hỏi: Thuỷ phân hoàn toàn 10 gam một lipit trung tính cần 1,68 gam KOH. Từ 1 tấn lipit trên có thể điều chế được bao nhiêu tấn xà phòng natri loại 72%. A. 1,428 B. 1,028 C. 1,513 D. 1,628 Đáp án là: A. 1,428 </s>
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<s> Chọn đáp án đúng với câu hỏi: Có bao nhiêu mảng kiến tạo lớn? A. 6. B. 7. C. 8. D. 9. Đáp án là: B. 7. </s>
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<s> Chọn đáp án đúng với câu hỏi: Chiến thắng biên giới Tây Nam của quân dân ta có ý nghĩa như thế nào? A. Tạo thời cơ thuận lợi cho cách mạng Cam-pu-chia giành thắng lợi B. Tiêu diệt hoàn toàn chế độ Pôn-pốt - Iêng-xê-ri C. Tăng cường tình đoàn kết của ba nước Đông Dương D. Tạo nên sức mạnh tổng hợp của nhân dân hai nước Việt Nam và Cam-pu-chia Đáp án là: A. Tạo thời cơ thuận lợi cho cách mạng Cam-pu-chia giành thắng lợi </s>
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<s> Chọn đáp án đúng với câu hỏi: Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. SCIENCE FLYING IN THE FACE OF GRAVITY It looked just like another aircraft from the outside. The pilot told his young passengers that it was built in 1964, a Boeing KC-135 refueling tanker, based on the 707. But appearances were deceptive, and the 13 students from Europe and the USA who boarded the aircraft were in for the flight of their lives. Inside, the area that normally had seats had become a long white tunnel. Heavily padded from floor to ceiling; it looked a bit like a lunatic asylum. There were almost no windows, but lights along the padded walls eerily illuminated it. Most of the seats had been taken out apart from a few at the back, where the young scientists quickly took their places with a look of apprehension. From 12 months, science students from across the continents had competed to win a place on the flight at the invitation of the European Space Agency. The challenge had been to suggest imaginative experiments to be conducted in weightless conditions. For the next two hours the Boeing's flight resembled that of an enormous bird which had lost its reason, shooting upwards towards the heavens before hurting towards Earth. The intention was to achieve weightlessness for a few seconds. The aircraft took off smoothly enough, but any feelings that I and the young scientists had that we were on anything like a scheduled passenger service were quickly dismissed when the pilot put the plane into a 45-degree climb which lasted around 20 seconds. Then the engine cut out and we became weightless. Everything became confused, and left or right, up or down no longer had any meaning. After 10 seconds of free-fall descent, the pilot pulled the aircraft out of its nosedive. The return of gravity was less immediate than its loss, but was still sudden enough to ensure that some students came down with a bump. After two hours of going up and down in the plane doing experiments, the predominant feeling was one of exhilaration rather than nausea. Most of the students thought it was an unforgettable experience and one they would be keen to repeat. What does the writer say about the plane? A. It had no seats. B. It had no windows. C. The inside was painted white. D. The outside was misleading. Đáp án là: D. The outside was misleading </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 best completes each of the following exchanges. Store assistant: “What’s wrong with your computer?” Customer: “______________” A. The screen is blank. B. I want to buy a new computer. C. My computer cost a lot of money. D. I bought it yesterday. Đáp án là: A. The screen is blank. </s>
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<s> Chọn đáp án đúng với câu hỏi: Cho X, Y là hai axit cacboxylic đơn chức mạch hở (M X < M Y ); T là este hai chức tạo bởi X, Y và một ancol no mạch hở. Đốt cháy hoàn toàn 12,38 gam hỗn hợp E gồm X, Y, T bằng một lượng vừa đủ O 2, thu được 0,47 mol CO 2 (đktc) và 0,33 mol H 2 O. Mặt khác 12,38 gam E tác dụng với dung dịch AgNO 3 trong NH 3 dư, thu được 17,28 gam Ag. Phần trăm khối lượng của X trong E gần nhất với giá trị nào sau đây? A. 18,8%. B. 18,2%. C. 18,0%. D. 18,6%. Đáp án là: D. 18,6% </s>
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<s> Chọn đáp án đúng với câu hỏi: Một α- amino axit X chỉ chứa 1 nhóm amino và 1 nhóm cacboxyl. Cho 10,68 gam X tác dụng với HCl dư thu được 15,06 gam muối. Tên gọi của X là A. Glixin B. Anilin C. Alanin. D. axit Glutamic Đáp án là: C. Alanin. </s>
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<s> Chọn đáp án đúng với câu hỏi: Phương trình │x - 2│ = -2 có số nghiệm là: A. một nghiệm. B. hai nghiệm. C. Vô số nghiệm. D. Vô nghiệm. Đáp án là: D. Vô nghiệm </s>
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