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Just as plant species native to regions with browsing mammals evolved many natur
Just as plant species native to regions with browsing mammals evolved many natur
游客
2025-02-25
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问题
Just as plant species native to regions with browsing mammals evolved many natural anti-browser defenses(such as sharp spines and toxic chemicals),
so humans in malarial regions have evolved dozens of chemical defenses against malaria
.
选项
A、so humans in malarial regions have evolved dozens of chemical defenses against malaria
B、humans in malarial regions have been evolving dozens of chemical defenses against malaria
C、there has been, in malaria regions, an evolution of dozens of chemical defenses against malaria
D、dozens of chemical defenses against malaria have been evolved by humans in malaria regions
E、similarly, in malaria regions, humans have evolved dozens of chemical defenses against malaria
答案
A
解析
B中用完成时的进行体不对,与句意不符,D中用了被动语态。C:除了极少数情况,GMAT不倾向于用there be句型,尤其是完成体;同时该表达不能与前句形成对比,前句中讲植物形成防御系统,动作执行者为plants,而there be中却不能突出动作的执行者humans。E中,介词短语in malarial region的位置变动,产生歧义,即“任何外地的人在此地区都会形成防御系统”。A中的humans in malarial regions与species native to regions形成鲜明的对照,so在此处可译为“同样地”。
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