单项选择题
The area of strong westerly winds occurring between 40°S and 60°S latitude is called the（）.
A.polar easterlies B.prevailing westerlies C.roaring forties D.jet streams
单项选择题 The AMVER system requires（）.
单项选择题 Of the following，（）is not a wind.
单项选择题 If the center of low pressure is due west of you in the Northern Hemisphere，which wind direction should you expect（）.
