Question

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, In1860, 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.

In1961, another two scientists found the first “word” that they could understand in that language. It shows how DNA tells the cell﹙細胞﹚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 illness. 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.

1.When did Mr Mendel discover why we look the same as other people in our family?

A. In 2000.     B. In 1961      C. In 1953     D In 1860

2.What did the two scientists find in 1961? They found_____.

A．a(chǎn)ll 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

3.How can we help sick people if we understand more “words” in the DNA map?

A．Make better medicine.                   B．Make them get jobs.

C．Make maps for them.                    D．Make them attractive

4.Which one is not true according to the article?

A．We look like our parents because of “genes” in our body

B．We have understand 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.

5.What do people think about this research about DNA?

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

 

Answer 1

【答案】

1.D

2.C

3.A

4.B

5.D

【解析】

試題分析：這篇短文簡要的介紹了額DNA的發(fā)現(xiàn)歷史，并介紹了這一發(fā)現(xiàn)對于人類生活的影響及人們對此的不同意見。

1.根據(jù)In1860, Mr Mendel discovered why we look the same as other people in our family. 描述，可知選D。

2.根據(jù)In1961, another two scientists found the first “word” that they could understand in that language.描述，可知選C。

3.根據(jù)Most people hope that this will help to make better medicine and help sick people.及上文描述，可知選A，制作更好的藥物。

4.根據(jù)So far, scientists have found all the words in the DNA map, but we still do not understand what they all do.可知選項B，描述錯誤。

5.根據(jù)短文最后一段描述，可知人們對這一發(fā)現(xiàn)持正反兩方面的意見。故選D，可能好可能壞。

考點：關(guān)于DNA問題的說明文閱讀

點評：本文淺顯易懂，各個小題都能在文中找到適當依據(jù)。只要認真閱讀短文，注意前后聯(lián)系，就能順利完成閱讀。文章所設(shè)試題主要考察細節(jié)查找，做題關(guān)鍵是找出原文的根據(jù)，認真核查小題和原文的異同。