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A.f(-x，y)=f(x，y)，f(x，-y)=-f(x，y)

B.f(-x，y)=f(x，y)，f(x，-y)=f(x，y)

C.f(-x，y)=-f(x，y)，f(x，-y)=-f(x，y)

D.f(-x，y)=-f(x，y)，f(x，-y)=f(x，y)

正确答案是B

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