对城市污水集中处理设施达到国家或地方排放标准排放的，不征收污水排污费。
参考答案：对
By the time you arrive in Liverpool, we ___________ in France for two weeks.
A．shall stay
B．have stayed
C．will have stayed
D．have been staying
既能清热平肝，又能息风止痉的药物是（）
A.鸡血藤
B.首乌藤
C.钩藤
D.雷公藤
E.络石藤
