在生产过程中,需按污水中BOD5的大小在提升泵房入水水渠中投加尿素和磷酸氢二钾,其投加比例是多少?
参考答案:BOD5:N:P=100:2.2:1
– Alice, you are the winner of the English speech contest.
– _____. Spoken English is the weakest for me.
A.Sound great
B.I think so
C.Of course not
D.You are kidding
项目可行性研究中,项目财务评价的投资现金流量估算的原则是( )。
A.现金预测
B.前后对比
C.投入产出对比
D.有无对比