单项选择题
The patrolman，while on duty on a passenger vessel，must have in his possession a(n)（）.
A.nightstick B.flashlight C.passenger list showing assigned berths D.A-I fire extinguisher
单项选择题 The only type of helicopter that may be refueled with the engine running and the blades turning is（）.
单项选择题 The most likely location for a liquid cargo fire to occur on a tanker would be（）.
单项选择题 The major cause of anchor buoy pendant wire failures is（）.
