2. 职称英语
  3. After you have exited the operating system and shut down the projector, please f

After you have exited the operating system and shut down the projector, please f

游客2025-06-15  16
问题 After you have exited the operating system and shut down the projector, please flick the master power switch to the "______" position.
选项 A、of
B、to
C、off
D、over
答案 C
解析 由状语从句after you have exited the operatingsystem and shut down the projector(在您退出操作系统并关闭投影仪之后)和masterpower switch(电源总开关)这些内容可推断，使用完机器后应该将其关闭，因此选择(C)off。电脑或其他电器的电源开关一般标有“On(开)／Off(关)”。
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