题干
Our government has tried many ways to the smog(雾霾)problem. Maybe we'll have a clear sky in the near future.
A：put away
B：work out
C：come up
答案(点此获取答案解析）
B
Our government has tried many ways to the smog(雾霾)problem. Maybe we'll have a clear sky in the near future.
A：put away
B：work out
C：come up
的反函数为
，则
