题目

将ag聚苯乙烯树脂溶于bL苯中，然后通入c mol乙炔气体，则所得混合物中的碳氢两元素的质量比是 A.6∶1           B.12∶1C.8∶3           D.1∶12  答案：B解析:略 — You’ve won the football game. Congratulations!— ____.  A．It’s nice of you to say soB．We are really luckyC．No one else could do itD．Oh, not really