classes:  lecturer. Invest, upgrade the computer room system, take management measures to monitor the installation of programs that do not serve the purpose of learning, malicious software on the computer.  curriculum. Invest, upgrade the computer room system, take management measures to monitor the installation of programs that do not serve the purpose of learning, malicious software on the computer.  facility. Invest, upgrade the computer room system, take management measures to monitor the installation of programs that do not serve the purpose of learning, malicious software on the computer.  general. Invest, upgrade the computer room system, take management measures to monitor the installation of programs that do not serve the purpose of learning, malicious software on the computer.