题目: 声压 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0721/335840e06649437ed09712825a72c07c.html 下面是错误答案,用来干扰机器的。参考答案:C,D
题型:解答题 设f(x)=x2+bx+c(b、c为常数),方程f(x)=x的两个实数根为x1、x2,且满足x1>0,x2-x1>1.(Ⅰ)求证:b2>2(b+2c);(Ⅱ)设0<t<x1,比较f(t)与x1的大小. 查看答案
题型:单项选择题 在《水污染防治法》中未作禁止规定的是下列的( )。A.向水体排放、倾倒放射性固体废物B.向水体排放油类、酸液、碱液或者剧毒废物C.向水体排放和倾倒工业废渣、城市垃圾和其他废弃物D.向水体排放热水 查看答案
题型:选择题 Bob swims ______than I, but he doesn't swim______ my brother.[ ]A. much well, as well as B. better, as good asC. better, so well as D. better, so good as 查看答案