问题 单项选择题

有机磷农药中毒的机制是( )。

A.抑制蛋白质的合成
B.使胆碱酯酶失去活性
C.形成硝酸化胆碱酶
D.胆碱酯酶水解
E.增强胆碱酯酶活性

答案

参考答案:B

解析:[知识点] 特殊解毒剂介绍

阅读理解

Most people agree that it’s important to have a sense of humor. Having the ability to laugh can help one overcome anxiety, and make better decisions in difficult situations. People with a well-developed sense of humor appear to be happier, and some are healthier as well. This suggests that having a sense of humor is good for you. Humorless people may find themselves being treated as a fool, and become anxious and upset.

A sense of humor also plays an important role in human relationships. However, not everyone has a sense of humor. People with developmental disabilities (发展性能力丧失) can sometimes have no sense of humor, or have a very strange one.

A number of factors affect a person’s sense of humor, with the age probably being the main one. Young children are often highly amused by simple jokes or shows, while teenagers prefer to enjoy the ironic (讽刺的) events. Educational level, culture, and religious faith also affect one’s sense of humor. While Christians, for example, may have a deep appreciation of jokes about the Bible, others may find them disrespectful.

Many people believe that a sense of humor is something that develops on its own, and that you cannot teach someone to understand why jokes, certain comments, situations or events are funny. However, things can be done to enhance one’s sense of humor. Children, for example, benefit from being told jokes and encouraged to laugh, although some children’s jokes might seem rather strange to adults. If you have children, try to encourage them to tell jokes and think about what makes things funny. And it will help them develop a sense of humor.

小题1:The purpose of the passage is to _______.

A.explain what influences a person’s sense of humor

B.tell readers the importance of being healthy

C.explain how to make better decisions

D.tell readers how to understand jokes小题2:What does the underlined word in Paragraph 4 “enhance” probably mean?

A.Enjoy.

B.Reduce.

C.Improve.

D.Prevent.小题3:According to the passage, which of the following isn’t talked about in our passenger?

A.Culture.

B.Age

C.Educational level.

D.Family backgrounds.

单项选择题