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:D 答案解析:[试题分析“田节辨析题,通过理解原文即可推理得知答案。 [详细解答] 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