The prevailing wind is the wind direction most often observed during a given time period. Wind speed is the rate at which the ai

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问题 The prevailing wind is the wind direction most often observed during a given time period. Wind speed is the rate at which the air moves past a stationary object.

选项 A、motionless
B、massive
C、flexible
D、noticeable

答案A

解析 stationary固定的。A.motionless不动的;B.massive厚重的;C.flexible灵活的;D. noticeable显而易见的。
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