题目内容
8.DNA is the whole"map"of the human body.It is something that all humans have,and it tells the body what to do.DNA is the reason that we look like our parents,because we get some of their DNA to make our own.People have been trying to understand the human body for a long time.In 1860,Mr.Mendel discovered why we look the same as other people in our family.It is because of small things called"genes"(基因) in our body.In 1953,two scientists,Watson and Crick,found out that those small parts are really messages.They're written in the DNA with a special language.
In 1961,another two scientists found the first"word"that they could understand in that language.It shows how DNA tells the cell (细胞) to build its parts.So far,scientists have found all the words in the DNA map,but we still do not understand what they all do.By understanding what just one"word"means,we can help to save people from several illnesses.So the more we understand,the more doctors will be able to do.
Most people hope that this will help to make better medicine and help sick people.Other people worry that when we learn more"words"and find out more information,we will use it in the wrong way,just to make people more attractive (有吸引力的),or stop sick people getting jobs.
根据短文内容,选择最佳答案.
41.When did Mr.Mendel discover why we look the same as other people in our family?D
A.In 2000.
B.In 1961.
C.In 1953.
D.In 1860.
42.What did the two scientists find in 1961?They foundC.
A.all the words in the DNA map
B.small things called"genes"in our body
C.the first"word"they could understand in that language
D.those small parts are written in the DNA with a special language
43.How can we help sick people if we understand more"words"in the DNA map?A
A.Make better medicine.
B.Make them get jobs.
C.Make maps for them.
D.Make them attractive.
44.Which one is not true according to the article?B
A.We look like our parents because of"genes"in our body.
B.We have understood what all the words in the DNA map do.
C.DNA is the whole"map"of the human body.
D.DNA tells the cell to build its parts.
45.What do people think about this research about DNA?D
A.It can be only bad.
B.It can be only good.
C.It can be good but won't work.
D.It can be good and bad.
分析 这篇短文简要的介绍了DNA的发现历史,并介绍了这一发现对于人类生活的影响及人们对此的不同意见.
解答 41.D细节理解题.根据文中第二段原句In1860,Mr Mendel discovered why we look the same as other people in our family.可以得知在1860年,Mr Mendel发现了为什么一家人看起来一样,可知选D.
42.C细节理解题.根据文中第三段原句In1961,another two scientists found the first"word"that they could understand in that language.可以得知,在1961年,另外领命科学家发现第一个在那种语言中他们可以理解的"单词".可知选C.
43.A细节理解题.根据文中最后一段原句Most people hope that this will help to make better medicine and help sick people.及上文描述,得知,如果我们对DNA图谱有更多的理解,就可以制作更好的药物.故选A.
44.B细节理解题.根据文中第三段原句So far,scientists have found all the words in the DNA map,but we still do not understand what they all do.可以得知,目前为,科学家已经发现了DNA图谱的所有语言,但是我们仍然不能理解它们都是做什么的,可知选项B,描述错误.
45.D细节理解题.根据短文最后一段描述,可知人们对这一发现持正反两方面的意见.故选D,可能好可能坏.
点评 本文浅显易懂,各个小题都能在文中找到适当依据.只要认真阅读短文,注意前后联系,就能顺利完成阅读.文章所设试题主要考察细节查找,做题关键是找出原文的根据,认真核查小题和原文的异同.