题目

If you want to buy this dress, you’d better ________ first to make sure it fits you. A. pay for it                B. take it off                C. tidy it up              D. try it on 答案：D 已知函数f(x)和g(x)都是奇函数，不等式f(x)＞0的解集是(a2，b)，g(x)＞0的解集是(，)且(＞a2)，那么不等式f(x)·g(x)＞0的解集是(　　)． [　　] A．(，) B．(－b，a2) C．(a2，)∪(－，－a2) D．(，b)∪(－b2，－a2)