21．DNAisanucleicacidthatcontainsgeneticinstructionsusedindevelopmentandfunctioningofallknownlivingorganismsandsomeviruses.A．/;aB．the;theC．the;/D．/;/

题目详情

21．DNA is a nucleic acid that contains genetic instructions used in development and functioning of all known living organisms and some viruses.
A．/; a B．the; the C．the; / D．/; /

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答案和解析

DNA is a nucleic acid that contains the genetic instructions used in the development and functioning of all known living organisms and some viruses.
脱氧核糖核酸(DNA)是一种核酸含有遗传指令用于开发和运行的所有已知的生物体和一些病毒.

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