当x>1时,不等式a≤x+1x-1恒成立,则实数a的取值范围是______. 发布时间:2017-04-22 14:00 │ 来源:www.tikuol.com 题型:填空题 问题: 当x>1时,不等式a≤x+1x-1恒成立,则实数a的取值范围是______.
题型:填空题 PH=2的两种一元酸x和y,体积均为100ml,稀释过程中PH与溶液体积的关系如图所示,分别滴加溶液(c=0.1/L)至PH=7,消耗溶液的体积为Vx,Vy,则A.x为弱酸Vx<VyB.x为强酸Vx>VyC.y为强酸Vx>VyD.y为弱酸Vx<Vy 查看答案
题型:填空题 In this workshop, the output of July was three times ________ of January. [ ]A. that B. this C. one D. it 查看答案