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  DNAisthewhole"map"ofthehumanbody.Itissomethingthatallhumanshave,andittellsthebodywhattodo.DNAisthereasonthatwelooklikeourparents,becausewegetsomeoftheirDNAtomakeourown.Peoplehavebeentrying

  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 (细胞)to build its parts,(有几个单词看不清) 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.

  根据短文内容,选择最佳答案.

  51.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.

  52.What did the two scientists find in 1961?They found___.

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

  C.Make maps for them. D.Make

1回答
2020-05-21 16:22
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黄芝平

  51-55DCABD

  51.D.细节理解题.根据文章的第二段In1860,Mr.Mendeldiscoveredwhywelookthesameasotherpeopleinourfamily.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D.

  52.C.细节理解题.根据文章第二段In 1961,another two scientists found the first"word"that they could understand in that language可知发现了第一个信息.故选C.

  53.A.推理判断题.根据文章的第三、四段中Byunderstandingwhatjustone"word"means,wecanhelptosavepeoplefromseveralillnesses.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.

  54.B.推理判断题.根据文章的第三段Sofar,scientistshavefoundallthewordsintheDNAmap,butwestilldon'tunderstandwhattheyalldo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whywelookthesameasotherpeopleinourfamily.Itisbecauseofsmallthingscalled"genes"(基因)inourbody可知A是正确的;由scientistshavefoundallthewordsintheDNAmap可知C是正确的;由DNAtellsthecelltobuilditsparts可知D是正确的.

  55.D.细节理解题.根据文章最后一段的内容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,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.

2020-05-21 16:25:51

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