单项选择题
A.Changes direction clockwise，as from north to east，etc
B.Changes direction violently and erratically
C.Remains constant in direction and speed
D.Changes direction counterclockwise，as from south to east，etc
单项选择题 In regions near the poles，the winds are generally described as（）.
单项选择题 If you observe the point of cloud convergence shifting to the right and the “bar”of the storm appears to move along the horizon（）.
单项选择题 If you are caught in the left semicircle of a tropical storm，in the Southern Hemisphere，you should bring the wind（）.