单项选择题
Weather forecast messages are usually（）.
A.Given only to TV stations B.Transmitted only by commercial broadcast stations C.Broadcast in plain language D.Broadcast immediately on VHF Channel 16 and 2182 kHz
单项选择题 Weather conditions in the middle latitudes generally move（）．
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（）.
单项选择题 The eye of a hurricane is surrounded by dense black cumulonimbus clouds which are called the（）.
