题目

—Why not open the windows to let_____cool air in?     —I'd rather you didn't_____air in our town is terribly polluted.      A.a;The                       B/;The                  C./;/          D.the:/ 答案:B在北方的冬季,常见的几种物态变化现象中,属于凝华的是(  )A.室外冻冰的衣服变干B.房间窗户玻璃的内表面出现冰花C.湖面结了厚厚的一层冰D.正在跑步的人,口中呼出“白气”
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