问题 选择题

动物细胞中的能量转换器是                                      (    )

A.线粒体

B.染色体

C.叶绿体

D.叶绿体和线粒体

答案

答案:A

题目分析:叶绿体和线粒体是细胞中的能量转换器,叶绿体能够将光能转化成化学能储存在有机物中,线粒体可以将细胞中的有机物分解,释放出有机物中储存的能量。叶绿体存在于植物细胞中,而线粒体丰在于活细胞中,即植物细胞和动物细胞中都有线粒体,故选项A符合题意。

阅读理解

A year ago,I paid no attention to English idioms (习语), though my teacher told us the importance again and again. But soon, the importance of English idioms was shown in an amusing experience.

One day, I happened to meet an Englishman on the road, and soon we began to talk. As I was talking about how I was studying English, the foreigner seemed to be surprised. Gently shaking his head,shrugging his shoulders, he said,“You don’t say!” “You don’t say!” I was puzzled. I thought , perhaps this is not a right topic. “Well, I’d better change the topic.” So I said to him. “Well, shall we talk about the Great Wall? By the way, have you ever been there?” “Certainly, everyone back home will laugh at me if I leave China without seeing it. It was wonderful.” He was deep in thought when I began to talk like a tourist guide. “The Great Wall is one of the wonders in the world. We are very proud of it.” Soon I was interrupted (打断) again by his words: “You don’t say!” I couldn’t help asking, “Why do you ask me not to talk about it?” “Well, I didn’t ask you to do so,” he answered, greatly surprised. I said, “Didn’t you say ‘you don’t say’?” Hearing this, the Englishman laughed to tears. He began to explain, “ ‘You don’t say’ actually means ‘really!’ It is an expression of surprise. Perhaps you don’t pay attention to English idioms.” I realized I had made a fool of myself. Since then I have been more careful with idiomatic expressions. Remember: what the English teachers said is always right to us students.

小题1:A year ago, I paid no attention to English idioms because       .

A.I had no interest in them

B.English idioms were very difficult

C.I did not realize the importance of them

D.my teacher didn’t tell us the importance of them小题2:At first, on hearing “You don’t say,” I thought the foreigner meant       .

A.I had talked too much

B.I had to stop talking

C.he was not interested in the topic

D.he was only interested in the Great Wall小题3:“… was shown in an amusing experience.” The word “amusing” probably means       .

A.interesting

B.important

C.terrible

D.unlucky小题4:Which of the following is TRUE according to the passage?

A.The Englishman wanted me to act as his guide.

B.The Englishman left China without seeing the Great Wall.

C.The Englishman wanted to see the Great Wall after I talked about it.

D.The Englishman visited the Great Wall and thought it worth visiting.小题5:After the Englishman explained the idiom, ___________.

A.I felt very silly

B.the Englishman became a real fool

C.I became more carefully in everything

D.I thought the Englishman had made me a fool

单项选择题