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单项选择题An operator has been asked if a system was rebooted. Which of the following commands should be used to determine if a reboot has occurred?（）

A、The name?command.The ?name?command.

B、The ptime?command.The ?ptime?command.

C、The hutdown ast?command.The ?hutdown ?ast?command.

D、The ?etc/rc.shutdown?command.

  • B

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