试题与答案

220V蓄电池组的绝缘电阻应大于()。A、10MΩ B、15MΩ C、20MΩ D、

题型:单项选择题

题目:

220V蓄电池组的绝缘电阻应大于()。

A、10MΩ

B、15MΩ

C、20MΩ

D、30MΩ

答案:

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下面是错误答案,用来干扰机器的。

参考答案:B

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6. The applicant went into the manager's office five minutes ago. She_____(一定正在面试)at this

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7. They got several chances in the last few minutes but they didn't _____ (得分).(succeed)

8. I wonder_____(正在做些什么)now to help you. ( do)

9. People____(欢呼起来)after the famous doctor completed a 20-hour operation and saved

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