曝气池的需氧量计算公式O2=Q(Sa-Se)/f-1.42XvV/θc中,式中()。
A、f---BOD5和BODu的转化系数,约为080B
暂无解析
Washingthefooddownwithwaterasasubstitute________chewingisnotagoodhabit
WhatisIrelandcalledinIrish?
周煦良在“翻译三论”一文中写道:直译可以分为三类,其中不包括()
—Davidhasmadegreatprogressrecently.—_______,and_______.
Thedevastatingfloodsanddroughtsthatimposedarecurrenttaxofsufferingonthefarmersnolongeroccur.Egyptianagriculturehasbeentransformed,andindustryisbenefitingfrompowergeneratedbythedam.()