单项选择题 During system startup, many applications are starting that are not needed. Which of the following can be used to evaluate all startup applications?（）

单项选择题 When attempting to boot a PC, the POST process completes without error. The PC then displays,‘non system disk or disk error’. Which of the following would MOST likely cause the issue?（）

单项选择题 Which of the following switches in Windows can be used to ping a host until stopped?（）