单项选择题 A user reports that printed pages are smearing after the pages come out of a laser printer. Which of the following is the MOST likely problem?（）

多项选择题 Which of the following are correct sockets for an Intel Core IX series processor?（） (Select TWO).

单项选择题 The technician is moving a user’s files from a Windows XP PC to a Windows Vista PC. Which of the following directories corresponds to each operating system?（）