正确答案: B

2套

题目：客船海水泵及自动报警和探火系统应有不少于________动力供应源

解析：B

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举一反三的答案和解析：

[单选题]救生艇基本结构中的舭龙骨又称扶正扶手，其主要用途之一是（）。

便于水中人员利用其登上救生艇

[单选题]在灭火时，可以与1211灭火剂同时使用的有______。

泡沫

[单选题]It’s getting dark. Please ________ the cargo lights.

turn on

[单选题]The cooling water of the diesel engine should be treated with chemical, because it contains .

salinity

[单选题]You should keep national flag（飘扬）____.

flying

[单选题]Electrical supply is always needed even if only for lighting so after a ship goes into service it is extremely rare for the main bus-bars to be dead, it therefore follows that the bus-bars are continuously alive the life of the ship.

throughout

[单选题]遇险人员登上艇筏后组织全体人中轮流值班的时间是：

24小时

[单选题]lower a little

降一点儿

[单选题]救生艇上应以经久的明显字迹标明（）

乘员定额