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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

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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

單項選擇題

The area of strong westerly winds occurring between 40°S and 60°S latitude is called the（）.

A.polar easterlies
B.prevailing westerlies
C.roaring forties
D.jet streams