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  3. Research should continue on controlled nuclear fusion, but no energy program sho

Research should continue on controlled nuclear fusion, but no energy program sho

游客2025-05-10  13
问题 Research should continue on controlled nuclear fusion, but no energy program should be premised on its existence until it has proved practical.
选项 A、focused
B、concentrated
C、agreed
D、based
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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