题目内容

We made a ___ to keep working together.

A. commit
B. committee
C. commitment
D. committing

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I know he was very frustrated when his job application was rejected. I can__________ that.

A. relate with
B. relate in
C. relate upon
D. relate to

__________ the word hero was reserved for those who performed acts of distinct courage beyond the call of duty.

A. It used to be that
B. This used to be that
C. That used to be that
D. He used to be that

酶被固定化后,一般稳定性增加。( )

A. 对
B. 错

酶的总活性越高,其纯度就越高。( )

A. 对
B. 错

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