题目

 ―Could I smoke here?    ―I’d prefer _______if you don’t smoke in front of the children. A. that    B. this     C. it     D. you 答案:C某同学以正常速度从教学楼的一楼登上二楼,他登楼的功率最接近于(  )A.10WB.100WC.1000WD.10000W
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