单项选择题
A.挖掘机B.顶管机C.推土机D.抽水机
A.255.255.255.252B.255.255.255.248C.255.255.255.240D.255.255.255.224
A.49.0001.1920.1680.1001.00B.86.0001.0192.0168.1001.00C.49.0001.1921.6800.1001.00D.86.0010.1921.6810.0001.00