单项选择题 During inspection of the machinery space, which of the following statements points to an unsatisfactory organization of the systematic maintenance?（）

单项选择题 When the PSCO would like to witness a fire drill carried out by the crew, he should consult （）to locate a simulated fire.

单项选择题 The PSCO would be justified in making a detailed inspection of all life-saving appliances, if he sees that （）.