题目内容

【C4】______

A. factor
B. determinant
C. measurement
D. standard

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【C5】______

A. rate
B. ratio
C. velocity
D. ration

【C9】______

A. related
B. relation
C. relate
D. relative

【C20】______

A. depart from
B. engage in
C. return to
D. depend on

【C18】______

A. production
B. produce
C. yields
D. efficiency

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