设f(x)=|2-x2|,若0<a<b,且f(a)=f(b),则ab的取值范围是( )
A:(0,2)
B:(0,2
C:(0,4
D:0,2
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- The radio says there will be a heavy storm in Mount Emei tomorrow.
- Bad luck. I _________ to go there with my classmates.