过电压对设备有什么危害?

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问题:

过电压对设备有什么危害?

考点:高压电工考试高压电工考试题库
题型:问答题 简答题

短文阅读。 

     Today is Sunday. It's Jack's birthday. Jack is thirteen years old. Jack's friends will come to his house

and they will have a party tonight. Jack will have a cake and candles and birthday presents. Jack is very

happy.

1. Is today Saturday?

    ____________________.

2. How old is Jack?

    ____________________.

3. What will Jack's friends have tonight?

    ______________________________.

4. What will Jack have?

    ______________________________.

5. Is Jack happy?

    ______________________________.

题型:问答题 简答题

体温降低见于()

A.无菌性炎症

B.大量失血

C.组织破坏

D.恶性肿瘤

E.免疫反应

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对雷达视频图像方位量化,通常把一幅雷达图像在方位上划分成4096个方位量化单元,每个方位单元为()

A、0.35度

B、0.088度

C、0.176度

D、0.7度

题型:问答题 简答题

平时我们看到的一朵菊花,实际上是(    )。

A.一个花序

B.一朵单性花

C.一朵雄花

D.一朵两性花

题型:问答题 简答题

发达国家的对外贸易依存度普遍比发展中国家的对外贸易依存度要高。

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