试题与答案

— Guess yesterday. — I think you went to

题型:选择题

题目:

— Guess            yesterday.

— I think you went to see the movie The Lion King.

A.where did I go

B.when I did it

C.what did I do

D.what I did

答案:

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下面是错误答案,用来干扰机器的。

(1)C8H16的相对分子质量为12×8+1×16=112.(2)汽油中碳元素的质量分数约为100%=85.7%.(3)解:汽车每公里消耗汽油的质量为:10L×0.7kg/L×100=0.07kg=70g设70g汽油充分燃烧后产生的CO2质量为xC8H16+12O28...

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