单项选择题 While reading the muster list, you see that "three short blasts on the ships whistle and the same signal on the general alarm bells" is the signal for （）.

单项选择题 When you hear three short blasts on the ships whistle and the same signal on the general alarm bells, you （）.

单项选择题 The spreading of fire as a result of heat being carried through a vessels ventilation system, is an example of heat transfer by （）.