题目

—Where shall we go for the holiday,to the beach or into the mountains? —________ I don't really mind. A.Forget it!  B.Why not? C.What's the point?  D.It's up to you! 答案:D [句意:“我们去哪里度假,去海边还是去爬山?”“由你决定,我不介意。”It's up to you!“由你说了算!”符合题意。]锅炉燃煤时用鼓风机将煤粉吹起,成沸腾状燃烧.采用这一方法的优点是( )A.能增加煤炭燃烧的时间B.能减少有害杂质气体(如SO2等)的形成C.能增大煤炭与氧气的接触面积,使煤变成清洁能源D.能使煤燃烧充分,从而提高燃料的利用率
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