—_____I stay with you?

— Well, I would rather you_____me alone for a while.

A．Will; leave

B．Shall; leave

C．Will; left

D．Shall; left

废水处理中的吸附法、反渗透法和电渗析法属于( )法。

A．物理

B．化学

C．物理化学

D．生物