单项选择题
A. is more secure than a standalone anti-virus program.
B. can push out anti-virus updates from a local, centralized location.
C. catches more viruses than the standalone anti-virus program.
D. catches more spyware and malware than a standalone anti-virus program.
单项选择题 If a technician suspects that the voltage being delivered to a desktop computer’s power supply is insufficient or incorrect, which device should be used to determine the correct voltage?（）
多项选择题 Which of the following multimeter settings should only be used when there is no electrical flow through the part being tested? （）(Select TWO).
单项选择题 Which of the following access levels allows a user to perform normal day to day work with their own files but does not allow them to change system files or computer performance?（）