More and more rich people have promised to ______ their wealth after death to help the poor and the disabled.

A．give away

B．give up

C．give out

D．give in

确定最低扇区高度时，扇区的划分是以（）圆心，半径为（）。

A.归航台，46千米

B.近台，25千米

C.远台，36千米

D.DME，20千米