单项选择题
The force resulting from the earth’s rotation that causes winds to deflect to the right in the Northern Hemisphere and to the left in the Southern Hemisphere is called（）.
A.Pressure gradient B.Coriolis effect C.Aurora borealis D.Ballistic deflection
单项选择题 The doldrums are characterized by（）.
单项选择题 The direction of prevailing winds in the Northern hemisphere is caused by the（）.
单项选择题 Steady precipitation is typical of（）．
