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标题: 一个GRE机经填空 快考试了救救孩子!谢谢 [打印本页]

作者: 南下98    时间: 2019-9-3 11:44:07     标题: 一个GRE机经填空 快考试了救救孩子!谢谢

The (i)______ current-generation solar cells are (ii)______: although experimental cells have
reached efficiencies greater than 40 percent, most commercially available cells in the early part of the twenty-first century still struggle to get past about 20 percent.

A. attractions of D. clear
B. limitations of E. unmatched
C. improvements in F. misunderstood

答案是BD 请问CF为什么不可以呀?我的理解是冒号前面的内容和struggle对应,我觉得BD和CF都可以呀~谢谢!
作者: Jneasy    时间: 2019-9-3 13:39:32

冒号后面句子里面没有体现出experimental cell 相比于 commercial cell的提升呀, struggle to get past about 20 percent 和 limitation 更加匹配吧,个人理解哈
作者: 南下98    时间: 2019-9-3 17:14:47

Jneasy 发表于 2019-9-3 13:39
冒号后面句子里面没有体现出experimental cell 相比于 commercial cell的提升呀, struggle to get past ab ...

谢谢!




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