对上游来水或污水排放的水质、水量随时间变化显著情况下的水质影响预测，应选用（）模式。
A.动态或准稳态
B.静态或稳态
C.数值解
D.解析解
参考答案：A
_ late for school again, July. [ ]
A. Don't to arrive
B. Don't arrive
C. Not to arrive
D. Not arriving
9. –You should have apologized to them for not ______ at the party.
--I ________ but they didn’t forgive me anyway.
A．coming up; did
B．turning up; did
C．showing up; should have
D．appearing; should
