A. 小于2V B. 小于10V或大于-10V C. 等于2V或等于-2V D. 小于等于2V且大于等于-2V

A. 小于2V B. 小于10V或大于-10V C. 等于2V或等于-2V D. 小于等于2V且大于等于-2V

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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)

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)

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