单项选择题
The winds you would expect to encounter in the North Atlantic between latitudes 5° and 30° are known as the（）.
A.Doldrums B.Westerlies C.Trades D.Easterlies
单项选择题 The eye of a hurricane is surrounded by dense black cumulonimbus clouds which are called the（）.
单项选择题 The dense black cumulonimbus clouds surrounding the eye of a hurricane are called（）.
单项选择题 The Beaufort scale is used to estimate the（）.
