1.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 I860,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 (細(xì)胞)to build its parts,(有幾個單詞看不清) 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 Iearn 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.
根據(jù)短文內(nèi)容,選擇最佳答案.
51.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.
52.What did the two scientists find in 1961?They foundC.
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 arc written in the DNA with a special language
53.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.
54.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.
55.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 本文敘述了對于研究DNA,不同的人有不同的看法.有些人覺得這很有用,因為它可以幫助醫(yī)生們研制出更好的藥物來治病救人;也有點人覺得如果人們了解了DNA,人們會用錯誤的方式來使用這項技術(shù).

解答 51-55 DCABD
51.D.細(xì)節(jié)理解題. 根據(jù)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發(fā)現(xiàn)了我們?yōu)槭裁磿L得很像我們家族的其他人.故選D.
52.C.細(xì)節(jié)理解題.根據(jù)文章第二段In 1961,another two scientists found the first"word"that they could understand in that language可知發(fā)現(xiàn)了第一個信息.故選C.
53.A.推理判斷題.根據(jù)文章的第三、四段中By understanding what just one"word"means,we can help to save people from several illnesses.的內(nèi)容可知,人們對DNA信息了解的越多,醫(yī)生們可以做的就越多,他們可以研制出更好的藥來拯救病人,故選A.
54.B.推理判斷題.根據(jù)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,到目前為止,科學(xué)家們已經(jīng)發(fā)現(xiàn)了DNA上的所有信息,但是我們?nèi)匀徊恢肋@些信息可以做什么,故B選項的表達(dá)是錯誤的;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是正確的;由scientists have found all the words in the DNA map可知C是正確的;由DNA tells the cell to build its parts可知D是正確的.
55.D.細(xì)節(jié)理解題.根據(jù)文章最后一段的內(nèi)容Most people hope that this will help to make better medicine and help sick people:Other people worry that when we Iearn more"words"and find out more information可知,對于研究DNA,不同的人有不同的看法.有些人覺得這很有用,因為它可以幫助醫(yī)生們研制出更好的藥物來治病救人;也有點人覺得如果人們了解了DNA,人們會用錯誤的方式來使用這項技術(shù).故選D.

點評 明確任務(wù)后,應(yīng)迅速閱讀全文來了解文章主要內(nèi)容,以及文章的感情基調(diào)、作者的意圖、態(tài)度傾向.在材料后的問題設(shè)置中,經(jīng)常有對文章大意的考查.對于概括大意的題目,需要通篇考慮,對要點加以歸納概括,這類題目有時可以從文中找到答案,但有時需要用自己的話來概括

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