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17.Water,_____ we cannot live,exists in the form of liquid,gas or solid.(  )
A.from whichB.on whichC.by whichD.without which

分析 水意液体、气体和固体的形态存在着,没有水我们将无法生存.

解答 答案是D.考查定语从句,本句的主句为Water exists in the form of liquid,gas or solid.被修饰的先行词为water,定语从句是we cannot live,根据句意"没有水我们无法生存",所以用介词without,故答案选D.

点评 定语从句又称为形容词性从句,综观历年高考试题,我们可以发现该语法项目是测试中的热点与难点,解定语从句的题目首先要知道哪一句是主句,哪一句是从句,被修饰的词是谁,从句中的句子成分缺失什么,根据缺失成分的不同从而选出相对应的关系代词或者关系副词,从而选出正确的答案,解题的关键是从句句子的成分分析.

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