题目

—Father makes me take much exercise every day. —OK. _______exercise you do, ______ you are. A. The harder; the better         B. The higher; the great C. The more; the healthier        D. The sooner; the happier 答案：C已知函数f(x)=loga[(1a-2)x+1]在区间上[1，3]的函数值大于0恒成立，则实数a的取值范围是（　　）A．(12，1)B．(12，35)C．（1，+∞）D．(0，35)