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...