同一排放口排放两种或两种以上不同类别的污水,且每种污水的排放标准又不同时,其混合污水的排放标准按()计算。
A.第一类污染物
B.第二类污染物
C.第三类污染物
D.
参考答案:D
已知关于x的方程ax+b=c的解为x=2,则|c-2a-b-6|=______.
No decision______about any future appointment until all the candidates have been interviewed.
A. will be madeB. is madeC. is beingD. has been made