偏向力
参考答案:
柯氏力只能改变空气运动的方向,不能改变其速率,所以称它为偏向力。
请开始答题:(共15小题)
4278()
A.A
B.B
C.C
D.D
This year he has made great _____ with his English.
He feels proud of it. [ ]
A. achieve
B. improvement
C. progress
D. progresses