题干
It was a bad idea to build a power station in the deep valley, but it _____ as well as we had hoped.
A：cameoff
B：madeout
C：broughtout
D：wentoff
答案(点此获取答案解析）
D
mCO2+nH2O中，各化学计量数之间的关系正确的是（ ）