单项选择题
Which of the following utilities can be used to diagnose DirectX hardware and driver problems?（）
A. Device manager B. Computer management C. msinfo32 D. dxdiag
单项选择题 Which of the following memory modules is a DDR3 chip?（）
单项选择题 The last step in resolving an end user ticket should be which of the following?（）
单项选择题 Which of the following types of printers uses a fuser to print a document?（）
