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单选题
A technician has resolved a paper jam. After the jam is cleared, the display continues to indicate that the printer is jammed. Which of the following should be performed NEXT?（）
A
Power cycle the printer
B
Print a test page
C
Remove all the paper trays and restart the printer
D
Remove and replace the roller
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单选题—Sorry I’m late, but I got caught in a traffic jam. —That’s all right.______A
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I’m not late for our appointment, am I?D
You’re not used to traffic jams.
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