如何检修柴油发电机的控制屏？
如何更换柴油发电机机油？
On a ship，a fire pump may be used for other purposes if（）. the other services are run off a reducing station with a pressure gage。 a separate fire pump is available for use on the fire main。 all other services are operated by a manifold near the pump。 All of the above。
教育非正式群体的原则方法是什么？
On a rigid liferaft which is equipped with all of the required equipment you may NOT find a（）. boathook。 fishing kit。 lifeline or grab rail。 sea painter。
根据《药品流通监督管理办法（暂行）》的规定，从事药品经营的销售人员必须符合的条件，不包括（）
