题目内容
10、Engines are to machines ____ hearts are to animals.
A. as B. that C. what D. which
试题答案
10、
C.
解析：固定句型。A is to be B what C is to D:A对B而言正如C对D一样。What=just as,意思是“好像，犹如，好比”做连词，引导比较状语从句。此句型出现在人教版教材高二（上）P21。再如：Water is to fish what air is to man. A sail is to a boat what an engine is to a car（介词to表示两者的关系）.
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