A.By recycling all the water.B.By using very little.C.By transporting plenty from Eart

外语类 公共英语 已帮助 人

A.By recycling all the water.

B.By using very little.

C.By transporting plenty from Earth.

D.By controlling the humidity on board.

请帮忙给出正确答案和分析,谢谢!

热搜:a是b的充分条件,b是a的必要条件吗