What are two security appliances that can be installed in a network? (Choose two.)()
All electrical appliances aboard a vessel should be grounded to().
What are two security appliances that can be installed in a network (Choose two.)()。
()(所有船员) must know the locations as well as the operations of the life-saving and fire-fighting appliances.
All the crew must know the locations as well as the ()of the life-saving and fire-fighting appliances.
() must know the location as well as the operation of the life-saving and fire-fighting appliances.