The views of Kass and O.T.A. on cloning research are The word "it" (Line 8, Para. 2) most probably refers to

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问题 The views of Kass and O.T.A. on cloning research are
The word "it" (Line 8, Para. 2) most probably refers to

选项 A、the First Amendment.
B、cloning experiment.
C、the US government.
D、recombinant DNA.

答案D

解析 本题问第二段第八行的"it"最有可能指的是什么。从"it"所在句的前一句"The committee wanted to know if the federal government should,or could,restrict the science",可知"it"指代的是"the science"。而从上文"In 1977,there was alarm in the country over recombinant DNA",可知"the science"具体指的是"recombinant DNA"。因此"重组DNA"为正确答案。第一修正案:文章讨论的是第一修正案是否应该允许克隆研究,因此,保护"第一修正案"没有意义。克隆实验:第二段中提到的"Some people feared clones,designer babies,a plague of superbacteria".说的是人们害怕"recombinant DNA",即"the science"可能带来的一系列后果。正是为了避免这些事物,包括"clones"的产生,"the committee"才想要政府限制"recombinant DNA"。当时还没有"clone experiment",所以也谈不上保护它。况且在这里"clones,designer babies,a plague of superbacteria"三个事物并无主次之分,因此单提保护克隆实验逻辑上讲不通。美国政府:"The committee wanted to know if the federal government should,or could,restrict the science"表明"the committee"希望政府限制"the science",但文中并未给出当时政府对"the science"如何限制,即文中并未谈到政府的立场,因此说支持政府在此没有根据。
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