题目内容

At an unsheltered anchorage the chief engineer officer shall consult with the master whetheror not to maintain an underway watch“An underway watch” means（）

A. a watch which is kept with lower standard
B. a watch which is kept when the ship isnt sailing
C. a watch which is kept when the ship is sailing
D. a watch which is kept when the ship is in a restricted visibility area

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按照国家标准《火灾分类》（GB／T4968--2008）的规定，火灾分为A、B、C、D、E、F六类。其中汽油、煤油、原油、甲醇、乙醇、沥青、石蜡火灾等属于（）。

A类火灾
B类火灾
C类火灾
D类火灾

二元肥料

车速里程表由（）组成。

A. 转速表和转速传感器
B. 转速表和轮速传感器
C. 车速表和里程表
D. 里程表和轮速传感器

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