单项选择题
In the doldrums you can expect（）.
A.steady，constant winds
B.frequent rain showers and thunderstorms
C.steep pressure gradients
D.low relative humidity
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相关考题
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单项选择题
In reading a weather map，closely spaced pressure gradient lines would indicate（）.
A.high winds
B.high overcast clouds
C.calm or light winds
D.fog or steady rain -
单项选择题
In North America the majority of the weather systems move from（）.
A.north to south
B.south to north
C.east to west
D.west to east -
单项选择题
In bad weather，what length of chain should be used with a single anchor? （）
A.3 times the depth of water
B.6 times the depth of water
C.10 times the depth of water
D.15 times the depth of water
