澄清池是一种将混合，（）与絮体沉淀分离三个过程综合于一体的水处理构建物。
A.加药
B.反应过程
C.排泥
D.处理
参考答案：B
-Shall we go Dutch this dinner?
-Forget it.__________today. [ ]
A.It's OK
B. This is my treat
C.I can't agree more
D. No problem
It’s a great _______ for a person to be able to speak fluent English when he is seeking a job.
A．chance
B．benefit
C．advantage
D．fortune
