一支220KV套管运行一年后，其介损tgδ值由0.28%上升到4.23%，可

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问题单项选择题

一支220KV套管运行一年后，其介损tgδ值由0.28%上升到4.23%，可能原因是（）。

A.电容屏产生悬浮电位

B.电容层间短路

C.油纸中有气泡

D.严重受潮

答案

参考答案：D

补全对话，情景问答

情景交际。

1. 当你想问别人来自哪里时，你应该怎样说？ [ ]

A. How are you?

B. Where are you from?

C. Nice to meet you.

2. 你对别人讲什么的时候，对方会回答“Thank you"？[ ]

A. It's very warm today.

B. Your umbrella is nice.

C. Are these your boots?

3. 当你想问别人今天的天气怎么样时，你该怎样说？[ ]

A. How is the weather today?

B. What's the temperature today?

C. It is very cold today.

4. 当你想知道西安离这儿远不远时，你应该说：[ ]

A. Is Xi'an far from here?

B. How far is it to Xi'an?

C. Xi'an is far from here.

5. 如果今天是雨天，你妈妈会怎样对你说？[ ]

A. Time to go to school.

B. It is very cold outside.

C. It's rainy today! Don't forget your boots and umbrella.

多项选择题

中华人民共和国的武装力量由（）组成。

A.中国人民解放军

B.中国人民武装警察部队

C.民兵

D.预备役部队