分析 文章大意:这篇短文简要的介绍了额DNA的发现历史,并介绍了这一发现对于人类生活的影响及人们对此的不同意见.
解答 46---50 DCABD
46题答案:D考查细节理解题.根据In1860,Mr Mendel discovered why we look the same as other people in our family.描述,可知选D.
47题答案:C考查细节理解题.根据In1961,another two scientists found the first"word"that they could understand in that language.描述,可知选C.
48题答案:A考查细节理解题.根据Most people hope that this will help to make better medicine and help sick people.及上文描述,可知选A,制作更好的药物.
49题答案:B考查细节理解题.根据So far,scientists have found all the words in the DNA map,but we still do not understand what they all do.可知选项B,描述错误.
50题答案:D考查推理判断题.根据短文最后一段描述,可知人们对这一发现持正反两方面的意见.故选D,可能好可能坏.
点评 本文浅显易懂,各个小题都能在文中找到适当依据.只要认真阅读短文,注意前后联系,就能顺利完成阅读.文章所设试题主要考察细节查找,做题关键是找出原文的根据,认真核查小题和原文的异同
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