题目

已知f(x)= ax (a>1), g(x)=bx (b>1), 当f(x1)= g(x2)=2时, 有x1>x2, 则a、b的大小关系是 A  a=b        B  a>b          C a<b            D  不能确定 答案：C—Would you like to go to the cinema with me tonight?—　　　.A. No, I won’t be freeB. Thanks a lotC. I’d love to, but I’m not freeD. I’m sorry to hear that