题目

33. --- I'm        sorry to have put you into so much trouble.   --- It doesn’t matter.  A. extremely             B. extensively             C. too                               D. Much 答案：A一种气态烷烃和一种气态烯烃的混和物1体积，完全燃烧后能生成1.2体积的CO2（相同条件下），则该混和物里一定含有A.CH4B.C2H4C.C3H8D.C2H6