单项选择题
A. Higher administrative complexity
B. Increased level of security
C. More effective usage of computing resources
D. Improved performance for users
单项选择题 Amailserverkeepsshuttingdown.Theadministratorgetsanerrormessageovertemperature error.WhichofthefollowingshouldtheadministratorreplaceFIRST？（）
多项选择题 An administrator has shut down a server to install additional memory. When the administrator restarts the server after the upgrade, it times out. Which of the following could be the cause of the problem?（）
单项选择题 Whenperformingabackup，whichofthefollowingmediatypeswouldhavenomovingparts？（）