最常用的海水淡化方法是 _________ ，目前多采用 _________ ．
蒸馏法、多级闪急蒸馏法
They had all children well looked after ____ their parents relieved(放心)
A．making
B．being made
C．to make
D．made
静脉性淤血时，局部静脉血液回流（）
A.增多
B.减少
C.不变
D.增多与减少交替进行
E.在心力衰竭时增多
