单项选择题
A load line of a ship is assigned by the（）.
A.minerals management service B.Department of energy C.corps of engineers D.a recognized classification socitey approved
单项选择题 A new coil of nylon line should be opened by（）.
单项选择题 A preson who sees someone fall overboard should（）.
单项选择题 A portable dry chemical fire extinguisher discharges by（）.
