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项motionless“不动的”;B项massive“厚重的”;C项flexible“灵活的”;D项noticeable“显而易见的”。故应选A。
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