The speed____which an animal lives is determined by measuring the rate____which it uses oxygen.A.in,at B.at,by C.with,in D.at,at答案应该选D,为什么?请说明原因,

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The speed____which an animal lives is determined by measuring the rate____which it uses oxygen.A.in,at B.at,by C.with,in D.at,at答案应该选D,为什么?请说明原因,
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The speed____which an animal lives is determined by measuring the rate____which it uses oxygen.A.in,at B.at,by C.with,in D.at,at答案应该选D,为什么?请说明原因,
The speed____which an animal lives is determined by measuring the rate____which it uses oxygen.
A.in,at B.at,by C.with,in D.at,at
答案应该选D,为什么?请说明原因,

The speed____which an animal lives is determined by measuring the rate____which it uses oxygen.A.in,at B.at,by C.with,in D.at,at答案应该选D,为什么?请说明原因,
at the rate of
at the speed of
固定搭配用法,这两个词前都用介词at,
从句中道理也是一样的.