单项选择题 Which of the following will MOST likely happen if a laser printer displays ‘15% fuser remaining’?（）

单项选择题 Two users share the same Windows 7 computer. The first user creates a document intended to be used by both users, and then logs off. The second user logs on and types the name of the document in the Start menu, but the document is not found. Which of the following is the problem?（）

单项选择题 Which of the following contains the user profile directory for Microsoft Windows 2000 and XP?（）