一艘轮船载重30请选择ABC-^)J)f(z*R.](k/l-R+c;V(x.l6Z2i6l
A.吨-R+c;V(x.l6Z2i6l
B.千米-R+c;V(x.l6Z2i6l
C.千克-R+c;V(x.l6Z2i6l