Which one of the following is not true according to the passage?（） It’s important to make clear the chain of command within the vessel。 It is primarily your own responsibility to look after your person safety。 The porthole is the first choice to escape when in emergency。 all cabins are fitted with a Survival at Sea Manual。
旅客信息系统是一个能够给旅客提供语音、文字信息或音频、视频服务的系统。
简述开展标准化工作应注意的几个问题。
Which one of the following information can not be found in engine room induction according to the passage?（） special precautions to deal with heat。 engine room safety procedures such as earmuffs, safety glasses, work clothes。 emergency escapes。 the location of safety equipment around the shi。
As the temperature of an air mass decreases，the（）. absolute humidity decreases。 relative humidity increases。 specific humidity decreases。 dew point rise。
医疗广告可以发布下列项目（）
