单项选择题

In swimming it is necessary to ______ the movement of the arms and legs.

A. coordinate
B. harmonize
C. collaborate
D. mediate
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单项选择题
The main objective reason is that some developed countries （）from the basic principle of anti-dumping and take the Anti-dumping Law as a tool for trade protection.

A. derive
B. deviate
C. refrain
D. exempt
单项选择题
On the whole it’s a good book; and it would be unwise to（）those small defects.

A. dwell on
B. identify with
C. persist in
D. hack into
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