第29题: [单项选择]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. A. motionless B. massive C. flexible D. noticeable 参考答案:A 答案解析:[解析] 本题中,stationary的意思是“固定的”。A项“motionless不动的”符合题意,如:The cat sat motionless.(这只猫蹲着不动。)其他三项“massive厚重