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單項選擇題

The eye of a hurricane is surrounded by dense black cumulonimbus clouds which are called the（）.

A.Wall cloud
B.Nimbostratus cloud
C.Bar
D.Funnel

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單項選擇題

The dense black cumulonimbus clouds surrounding the eye of a hurricane are called（）.

A.Spiral rainbands
B.Cloud walls
C.Funnel clouds
D.Cyclonic spirals

單項選擇題

The Beaufort scale is used to estimate the（）.

A.Wind direction
B.Percentage of cloud cover
C.Wind speed
D.Barometric pressure