A-A+

Now scientists have found in the past few year

2022-08-01 20:36:29 问答库阅读 166 次

问题详情

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

参考答案

正确答案：D
解析：承接第4段末尾人们对DNA的再认识(But just in the last few years it has become almost unbelievably complex， filled with strange parts whose functions are beyond today's imagining．)，作者在第5段指出了对DNA研究的态度：继续深入地开展下去。由此确定答案为D。