A.Wanted! Earth and Seas. More care for the earth.B.Wanted! Rivers and Oceans. More ca

外语类 公共英语 已帮助 人

A.Wanted! Earth and Seas. More care for the earth.

B.Wanted! Rivers and Oceans. More care for the water.

C.Wanted! Seas and Oceans—Dead or Alive?

D.Wanted! To live or to die. More care to ourselves.

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