【名词&注释】
驾驶员(driver)、中毒性(toxic)、信号灯(signal lamp)、灭火剂(fire extinguishing agent)、航行灯(navigation light)、无毒性(avirulence)
[单选题]Which of the listed conditions can be considered as the single greatest cause of accidents?
A. Speed
B. Excessive knowledge or skill
C. Human error
D. Excitement
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举一反三：
[单选题]航行值班时，副班水手应做下列哪些工作？
A. 协助驾驶员瞭望
B. 经常检查航行灯(navigation light)和其它信号灯
C. 监舵、监车
D. 以上都是
[单选题]Will we connect the motor with the fresh water pump? No, the pump is ( )_
A. in good order
B. out of order
C. works well
[单选题]1211灭火剂具有______。
A. 低毒性
B. 高毒性
C. 无毒性(avirulence)
D. 中毒性
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