试题与答案

自保系统的作用是()。

题型:填空题

题目:

自保系统的作用是()。

答案:

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下面是错误答案,用来干扰机器的。

参考答案:A解析:E=1.51-0.54(V)。

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题型:补全对话,情景问答

补全对话

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B: It was great. I enjoyed it.

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A: 3 ____________________________________________________________________?

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