Question

On June 26, 2000, two scientists, called Francis Collins and Craig Venter, told the world that they could read the whole “map” of the human body: DNA. DNA is something that everybody has, and it tells the body what to do. DNA is the reason that we look like our mother and father, 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, Gregor Mendel discovered a special reason why we look the same as other people in our family. It is because of small things named “genes” in our body. In 1953, James Watson and Francis Crick made another discovery and found out that those small parts are real messages written in the DNA with a special language.

In 1961, Marshall Nirenberg and Johann Matthaci found a message in DNA showing how DNA tells the cell（細胞）to build its parts. Scientists have now 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 save more people from several illnesses.

Most people hope that this will help make better medicine and help sick people. Other people worry that when people begin to know more words and find out lots of other information, we might use it in a wrong way, just to make people more attractive, or stop sick people from getting jobs. Man would have to meet a lot of trouble if DNA technic wasn’t limited（限制）in use.

1.When did we first know why we look like other people m our family?

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

2.What does the underlined word “ genes” mean?

A. The “map” of DNA.                B. A special language.

C. Small parts of DNA.                D. DNA

3.What did the two scientists first discover in 1961 ?

A. The “map” of DNA.               B. A new illness.

C. The language of DNA.              D. A message of DNA.

4.What can we do if we understand some “ words” of the language inside the body

A．Make people get new jobs.

B．Make medicine for illnesses.

C．Make maps of human.

D．Make people less attractive.

5.What do people think about this work’?

A．It can cause good or bad results.

B．It can cause only good results.

C．It can cause good results but won’t work.

D．It can cause only bad results.

 

Answer 1

【答案】

1.A

2.C

3.D

4.B

5.A

【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一發(fā)現(xiàn)的不同看法。

1.根據(jù)第二段In 1860, Gregor Mendel discovered a special reason why we look the same as other people in our family.描述，可知選A

2.根據(jù)第二段and found out that those small parts are real messages written in the DNA 描述，可知選C。

3.根據(jù)第三段In 1961, Marshall Nirenberg and Johann Matthaci found a message in DNA showing how DNA tells the cell（細胞）to build its parts.描述，可知選D。

4.根據(jù)第三段By understanding what just one “word”   means, we can help save more people from several illnesses.及第四段Most people hope that this will help make better medicine and help sick people.描述，可知選B。

5.根據(jù)短文最后一段描述，可知可能引起好的或者壞的結果。故選A。

考點：關于DNA發(fā)現(xiàn)歷史的記述文閱讀

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。文章所設試題主要考察細節(jié)查找，做題關鍵是找出原文的根據(jù)，認真核查小題和原文的異同。