问题 单项选择题

电力变压器运行时,下列哪项故障及异常情况应瞬时跳闸?()

A.由于外部相间短路引起的过电流

B.过负荷

C.绕组匝间短路

D.变压器温度升高和冷却系统故障

答案

参考答案:C

阅读理解

阅读理解。

  The new book Harry Potter and the Half-Blood Prince is warmly

welcomed by the children in China. It sells well across China. You can see and

hear the advertisements about the book here and there.

  Why is the book so attractive to children? After reading it, I was attracted

by the magic world. I can not help asking: where is our own Harry Potter?

  China has a long history and colorful culture. With a large market of

teenagers, China published (出版) many popular books among children.

However, why are the present books not as good as those foreign ones?

  Firstly, quite a number of children's books are focused on teaching, and they

have little interest value. Reading them, children often have a feeling of being

"educated".Certainly, they don't like them. Secondly, fewer children like the

same stories, but most Chinese books are usually much the same. One knows the

ending as early as in the beginning. Finally, the writers seldom think about

children's needs.

  First-class Reading for children should be interesting, and written in their

language.

1. About the present Chinese children's books, which is NOT right?

A. They have little interest value.    

B. Our writers seldom know children’s needs.

C. Most of them are the same.      

D. They are better than foreign ones.

2. Harry Potter is so popular because _____.

A. it's the same as Chinese books  

B. it can lead children into a wonderful world

C. it's not written in children's language  

D. it's advertised more often on TV or posters

3. The underlined phrase "First-class" means _____.

A. very simple  

B. low level  

C. really good

D. extra difficult

4. "Where is our own Harry Potter?" refers to _____.

A. the writer can't find any books for children

B. Chinese parents should buy Harry Potter for their children

C. our children should learn from Harry Potter

D. Chinese writers should write better books for children

5. The passage mainly tells us _____.

A. ways to read books

B. our children need another magic boy

C. ways to choose books

D. our children need more better books

阅读理解与欣赏