问题 选择题

奥运吉祥物福娃外材为纯羊毛线,内充物为无毒的聚酯纤维(),下列说法不正确的是

A.可用点燃方法区别羊毛与聚酯纤维

B.聚酯纤维和羊毛一定条件下均能水解

C.该聚酯纤维单体为对苯二甲酸和乙二醇

D.由单体合成聚酯纤维的反应属加聚反应

答案

答案:D

题目分析:A、羊毛是蛋白质,燃烧后有烧焦羽毛的味道,聚酯纤维没有,可以区分,正确;B、羊毛是蛋白质,可以水解,聚酯纤维分子中含有酯基,可以水解,正确;C、聚酯纤维为缩聚物,单体由发生水解的酯基处断开,添加去掉的基团即可,所以聚酯纤维的单体是对苯二甲酸和乙二醇,正确;D、对苯二甲酸和乙二醇发生缩合脱水反应,属于缩聚反应,错误,答案选D。

问答题
阅读理解

The world has changed and being intelligent isn’t normally equal to being a successful person. Look at the example of the blue whale : it has a huge brain, but it still doesn’t know how to avoid whalers or use its large size and weight to deal with those who try to use their body for profit. Scientists hold an opinion that the blue whale just likes some highly intelligent people who fail to succeed. Those highly intelligent people can’t succeed in life because they can’t communicate well with the world around them.

Intelligence is a word in life that makes you think you are better than others. Intelligence can blind these very people from how others view them. These people also think that the route to power and success results purely from intelligence and they sometimes live in a fantasy world that they create by their supposed brain power.

This is a distance that develops whether or not they realize it and sometimes, a person can be disliked simply because of his or her intelligence. This distance is sometimes so far apart that it gets to the position where they can’t listen to each other. One side thinks the other is stupid and the other thinks he/she is haughty(傲慢的). And most of the time it is the intelligent people who lose themselves in this situation. They become unpopular with most of the people around them. This affects them in whatever they do and sooner or later they will lose their confidence.

It doesn’t help that they get a culture shock - especially when they leave college and realize success and richness don’t always and sometimes never come naturally with intelligence. While some might think this is a dramatic picture to paint, it is sometimes the end result of some people.

小题1: The example of “the blue whale” is used to show ____.

A.communication is more important than intelligence

B.human beings are always more intelligent than animals

C.humans should have the sense of protecting animals

D.the blue whale is the largest animal in the world小题2: Those supposed intelligent people often believe that ____.

A.they should make their life the same with others

B.they should live in a better world than the others

C.they are sure to be successful because of their intelligence

D.other people’s opinion should be seriously considered小题3: What makes the intelligent people lose their confidence?

A.They become separated from other people and lose their support.

B.They often can’t get higher positions though they are intelligent.

C.They can’t persuade those stupid people to accept their ideas.

D.They often can’t make good use of their advantages.小题4: We can infer that the end result of the supposed intelligent people would be ____.

A.great achievements

B.more efforts

C.failure in the future

D.proper changes