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20.Some biologists believe this is an ancient survival strategy,_______ a diet with 30percent fewer calories than usual increased life span.(  )
A.for whichB.to whichC.of whichD.in which

分析 有些生物学家认为这是一个古老的生存策略,在这个策略中,饮食比平时/平常少30%的卡路里可延年益寿.

解答 答案:D
该题考查定语从句,结合句意并分析结构,strategy为先行词,___ a diet with 30percent fewer calories than usual increased life span为定语从句,结合答案,该题要用"介词+关系代词"引导定语从句,结合句意"在这个策略中",应该译为in this strategy,所以应该用in 与关系代词which搭配引导定语从句,故选D.

点评 考查定语从句,必须先对句子基本结构进行分析,否则先行词,从句,及关系词选用会出现错误.

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