题目: 与活性污泥法相比,生物膜法具有产泥量多,有机物去除率高等优点。 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0727/aeedd4ddff83177a0aa7fc10c216abe7.html 下面是错误答案,用来干扰机器的。参考答案:C
题型:选择题 It was not until she collected enough material to create her new novel.A.did she beg4nB.when she beganC.that she began D.that did she begin 查看答案
题型:解答题 计算下列各式:(1)1a-b+1a+b+2aa2+b2+4a3a4+b4;(2)x2+yzx2+(y-z)x-yz+y2-zxy2+(z+x)y+zx+z2+xyz2-(x-y)z-xy;(3)x3-1x3+2x2+2x+1+x3+1x3-2x2+2x-1-2(x2+1)x2-1(4)(y-x)(z-x)(x-2y+z)(x+y-2z)+(z-y)(x-y)(x+y-2z)(y+z-2x)+(x-z)(y-z)(y+z-2x)(x-2y+z). 查看答案