题目

将0.1mol两种气态烃(其中一种为炔烃)组成的混合气体完全燃烧后得3.36L(标况)CO2和3.6gH2O。则这两种烃的物质的量之比说法正确的是                (    )A.1:1           B.1:2          C.1:3            D.无法计算  答案：C解析: (   ) 1. My mobile phone was broken. It didn't       just now.   A. come out   B.  go off   C.  take off   D.  set off