Now scientists have found in the past few years ______.A.the exposure of DNA to the public

外语类 公共英语 已帮助 人

Now scientists have found in the past few years ______.

A.the exposure of DNA to the public is unnecessary

B.the tiny cell in DNA is a neat little machine

C.man knows nothing about DNA

D.man has much to learn about DNA

热搜:在公制与英制换算中,1in等于()。

答案解析

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  • 正确答案:D
    解析:推断题。由文章第四段可知,30年前人们将DNA的发现称为生物革命,刚开始时,人们认为DNA细胞很简单,但随着时间的推移,人们发现它其实极为复杂,由此推断,人们还需要进一步研究,所以D正确。