单项选择题
Two well-developed high pressure areas may be separated by a（）.
A.Hill of low pressure
B.Trough of low pressure
C.Valley of low pressure
D.Ridge of low pressure
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相关考题
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单项选择题
Tropical cyclones are classified by form and intensity.Which system does not have closed isobars（）.
A.Hurricane
B.Tropical disturbance
C.Tropical depression
D.Cyclone -
单项选择题
The wind is（）and decreasing.
A.anticlockwise rotating
B.anticlock rotating
C.clockwise rotating
D.clock rotating -
单项选择题
The strong wind will make us（）here for some days.
A.To stay
B.Staying
C.Stay
D.Stayed
