8.设f(x)=x2≤0则f(-x)等于x x),x>0.B f(-rC≤00A、f (-r)B、≥0. 8.设f(x)=x2≤0则f(-x)等于x x),x>0.B f(-rC≤00A、f (-r)B、≥0. 发布时间:2025-05-29 20:50:03