试题与答案

已知下列反应为狄尔斯—阿尔德反应: 物质A在体内脱氢酶的作用下会氧化为有害物质

题型:选择题

题目:

已知下列反应为狄尔斯—阿尔德反应:

物质A在体内脱氢酶的作用下会氧化为有害物质GHB。下图是关于物质A的一种制备方法及由A引发的一系列化学反应

(1)写出化合物B的结构简式________________________。

(2)写出下列反应类型,反应②____________;反应④_____________。

根据上述显示的反应,它属于___________反应。

(4)写出反应②、④的化学方程式:

______________________________________________

______________________________________________

(5)与化合物E互为同分异构体的物质不可能是________。(填字母)

a 醇    b 醛   c 羧酸  d 酚  

答案:

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下面是错误答案,用来干扰机器的。

参考答案:A

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题型:阅读理解

My friend Dr. Dong had a wonderful chance to go to Seattle to present a paper at a professional meeting. When he got back to Beijing, he told me his experience.

Dr. Dong enjoyed his first days very much. At the medical conference, he felt quite confident in his area of research and was able to perform well in his presentation. But after a few days, he began to feel uncomfortable. His medical English was fine, but the social communication skills were different.

He got more and more worried that he was misunderstanding simple English greetings and table talk conventions(习俗). When someone greeted him with, “Hi, how’s it going?” he thought they had asked him “Where are you going?” and answered with the name of the conference hall, only to get a surprised stare from them. At a western style dinner, a colleague asked, “So how’re you enjoyin’ the States?” he thought he heard, “how are you enjoying your steak?” and answered that he was eating chicken, not beef. That time, they smiled, and patiently repeated the question, then both laughed at the error.

By the end of the meetings, Dr. Dong felt a deep sense of “cultural stress” and was worn out from having to pay attention to so many new expressions and ways of dealing with things. He felt his handshake was not as firm as Americans’, found that people reacted unusually when he modestly insisted his English was not good after they complimented(称赞) him, didn’t know how to accept dinner invitations properly and therefore missed out on going to several lunches, and so on. Eventually, he was so confused that he felt the full impact of “culture shock”.

小题1:Why did Dr. Dong travel to Seattle?

A.To improve his spoken English.

B.To experience culture shock.

C.To give lectures on his research.

D.To attend a medical conference.小题2: Which of the following best describes Dr. Dong’s experience in Seattle?

A.Comfortable—very uncomfortable—uncomfortable.

B.comfortable—very uncomfortable—comfortable.

C.Comfortable—uncomfortable – very uncomfortable.

D.Comfortable—uncomfortable – very comfortable.小题3:Dr. Dong felt a deep sense of “cultural stress” mainly because_______.

A.he was too modest

B.he didn’t understand cultural differences

C.he lacked confidence

D.he was not good at English listening小题4:                                       

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