Erosion that is a slow process, but it constantly changes the features on the surface of the earth.

A．which is

B．although

C．being

D．is

下列属于我国军人退役安置内容的有( )

A．现役军人提拔

B．军人家属安置

C．复员军人安置

D．退伍军人安置

E．转业志愿兵安置