单项选择题
A.5%~10% B.10%~30% C.20%~40% D.10%~40%
A.抓扬式挖泥船 B.铲扬式挖泥船 C.耗吸式挖泥船 D.链斗式挖泥船
A.12000 B.13300 C.11200 D.12500