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若奇函数f(x)为满足,且,则
A.1
B.-1
C.2
D.-2
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函数f(x)的定义域为R,且满足:f(x)是偶函数,f(x-1)是奇函数,若f(0.5)=9,则f(8.5)等于
A.-9
B.9
C.-3
D.0