正确答案: C

the starting air valves stuck

题目：If the engine does not start on air, it may be due to

解析：C

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举一反三的答案和解析：

[单选题]在海上，当你看到来船的号灯仅为垂直两盏红灯，则来船为＿＿＿＿。

失控船不对水移动

[单选题]落水者千万不能用何物攻击鲨鱼：

刀具

[单选题]The master will be back(立即)_____.

in no time

[单选题]You may BEST turn a twin-screw vessel about，to the right，in a narrow channel by using ______.

Port engine ahead and the starboard engine astern

[单选题]活塞顶部烧蚀的程度可用_______测量

A＋B

[单选题]We expect to finish painting by Friday, if time pressing, the bosun can arrange ________work for the sailors

overtime

[单选题]下列有关ISM证书的叙述，哪些是正确的______。Ⅰ、国际航行船舶应同时持有有效的DOC副本和SMC正本Ⅱ、船舶如不持有DOC的副本，则SMC视为无效Ⅲ、如果船舶不持有有效的ISM证书，将成为港口国滞留船舶的明显理由Ⅳ、DOC和SMC的有效期均为5年，临时SMC任何情况下有效期不超过6个月

Ⅰ+Ⅱ+Ⅲ

[单选题]( )是人类行为的出发点、基础和最根本的原因。

需要