【名词&注释】
有毒气体(toxic gas)、抗生素、救生设备(survival equipment)、救生衣(life jacket)、气胀式救生筏、救生圈(buoy)
[单选题]气胀式救生筏充气所使用的气体应是（）
A. 有毒气体
B. 氨气
C. 二氧化碳和少部分氮气
查看答案&解析
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举一反三：
[单选题]Fuel droplets injected into a diesel engine cylinder must have adequate penetration to ____.
A. prolong the ignition delay period
B. ensure the beginning of fuel injection
C. thoroughly utilize the air charge
D. allow controlled fuel combustion
[单选题]何种救生设备是船上最简便的救生工具：
A. 救生衣
B. 救生圈(buoy)
C. 救生浮具
[单选题]One of the most common causes of reduction gear failure is gear wear caused by scoring as a result of
A. surface fatigue of the gears
B. an inadequate lube oil film
C. plastic flow of the gears
D. fretting corrosion from water
[单选题]干舷
A. free boat
B. freeboard
C. free board
D. dry board
[单选题]对感染伤口处理的主要原则______。
A. 可在伤口内直接倒入抗生素
B. 使局部伤口得到充分而通畅的引流
C. 可３～５天换敷料一次
D. 以上都是错误的
[单选题]A thrust bearing is used with a propulsion diesel engine to ____.
A. control axial movement of the crankshaft
B. transmit engine thrust to the propeller shaft
C. absorb vibrations in the propeller shafting
D. prevent propeller thrust from being transmitted to the hull
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