In front of our house _______ we used to swim.

A．a river lies that

B．does a river lie where

C．lies a river which

D．lies a river where

溶剂（），溶剂选择性好，芳烃收率低；溶剂含水量低，溶剂溶解度崐大芳烃收率高，混芳质量差。