流入比是如何定义的?
参考答案:
流入比是垂直于桨毂旋转平面的速度分量与桨尖速度的比值。
(2013·湖北,24)According to the law, all foreigners have to________with the local police within two weeks of arrival.
A.associate
B.dispute
C.negotiate
D.register
经济对于纠纷的处理方法。