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单项选择题The nice value is 60 in the  ps listing.  Which command is used to change this to a value of 20?()

A、 renice -n -20 {PID}

B、 renice -n 20 {PID}

C、 renice -n -40 {PID}

D、 renice -n 40 {PID}

  • C
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