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Research should continue on controlled nuclear

2022-08-06 23:33:29 问答库 阅读 181 次

问题详情

Research should continue on controlled nuclear fusion, but no energy program should be premised on its existence until it has proved practical.
A.focused
B.concentrated
C.agreed
D.based

参考答案

正确答案:D
解析:句意:我们应该继续核扩散控制的研究,但不能将能源项目建立在其存在的基础上(前提下),除非已被证明可行。premise作为及物动词,其意思是to base a theory,argument, etc.on an idea,thought,or belief;agree达成一致意见;focus关注,集中;concentrate关注,集中; base基于。所以D是正确答案。

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