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. 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 genes 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 don’t 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.

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

A. In 1680.                            B. In 1860.                            C. In 1953.                            D. In 1961.

2.Watson and Crick found ______ in 1953.

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. genes 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 passage?

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. Scientists have found all the words in the DNA map.

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 or bad.

Answer

1.B

2.D

3.A

4.B

5.D

【解析】

试题分析：本文叙述了对于研究DNA，不同的人有不同的看法。有些人觉得这很有用，因为它可以帮助医生们研制出更好的药物来治病救人；也有点人觉得如果人们了解了DNA，人们会用错误的方式来使用这项技术。

1.细节理解题。 根据文章的第二段In 1860, Mr. Mendel discovered why we look the same as other people in our family.可知，在1860年，Mr. Mendel发现了我们为什么会长得很像我们家族的其他人。故选B。

2.细节理解题。根据文章第二段In 1953, two scientists, Watson and Crick, found out that genes are really messages. They’re written in the DNA with a special language.可知，在1953年，Watson and Crick两位科学家发现基因携带信息，这些信息用特殊的语言写在DNA上。故选D。

3.推理判断题。根据文章的第三、四段的内容可知，人们对DNA信息了解的越多，医生们可以做的就越多，他们可以研制出更好的药来拯救病人，故选A。

4.推理判断题。根据文章的第三段So far, scientists have found all the words in the DNA map, but we still don’t understand what they all do可知，到目前为止，科学家们已经发现了DNA上的所有信息，但是我们仍然不知道这些信息可以做什么，故B选项的表达是错误的；由why we look the same as other people in our family. It is because of small things called “genes”（基因）in our body可知A是正确的；由scientists have found all the words in the DNA map可知C是正确的；由DNA tells the cell to build its parts可知D是正确的。

5.细节理解题。根据文章最后一段的内容可知，对于研究DNA，不同的人有不同的看法。有些人觉得这很有用，因为它可以帮助医生们研制出更好的药物来治病救人；也有点人觉得如果人们了解了DNA，人们会用错误的方式来使用这项技术。故选D。

考点：科普类短文阅读。