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问题 多项选择题

采用分级绝缘的主变压器运行中应注意（）

A、变压器中性点一定要加装避雷器和防止过电压间隙；

B、如果条件允许，运行方式允许，变压器一定要中性点接地运行；

C、变压器中性点如果不接地运行，中性点过电压保护一定要可靠投入；

D、变压器中性点没必要加装避雷器和防止过电压间隙。

答案

参考答案：A, B, C

填空题

（）是古代的一种说唱艺术形式，它起源于佛教的讲经宣传。
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听力题

阅读下面短文，用文中括号内所给动词适当形式填空，必要时可加助动词。

Many young people like KFC's food．

These days, in China we can see fewer people 小题1:________（eat） in KFC restaurants when we walk past．Because some of their foods were not safe．The danger小题2:     ________（come） from Sudan I．If a person eats too much of it, he 小题3:____________（get） cancer．Scientists 小题4:__________（find） Sudan I in some of KFC’s foods and asked it to stop 小题5:________（sell） them．Sudan I is a red dye．People use it 小题6:___________（color）oils but some people put it in foods to make them 小题7:___________（look） better．Now KFC restaurants 小题8:___________（sell） those foods again after scientists found no more Sudan I．If you 小题9:___________（eat） some of those foods last week, don't worry．There is very little Sudan I in them．It shouldn't 小题10:____________（be） a big problem．
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