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为了保证船舶航行安全,首先要确定船舶的航向与位置。船舶定位方法按照参照目标可分为( )。

A resistor is an electrical component that ()the flow of electrical current.
Do we call a large fire an “incident” or a kind of “disaster”?
An example of class "A" fire is a/an ().
CASE OF DEATH OR SERIOUS INJURY TO A PERSON IN AN ACCIDENT OR SHIPPING DISASTER is().
When fighting an electrical fire, you should first ().
What is an advantage of using foam in fire fighting?()
What is an advantage of using foam in fire fighting?()
When there is a fire in a large electric motor, normally the very FIRST step is to ()
Your vessel is equipped with a fixed CO2 system and a fire main system. In the event of an electrical fire in the engine room what is the correct procedure for fighting the fire?()
Your vessel is equipped with a fixed C02 system and a fire main system. In the event of an electrical fire in the engine room what is the correct procedure for fighting the fire?().
An important step in fighting any electrical fire is to().
The type of extinguisher which should be used for an electricity fire is().
In an alternating current electrical system, a low system power factor is a direct sign of ()
A fire in an electrical generator is considered to be ().
When a rescuer finds an electrical burn victim in the vicinity of live electrical equipment or wiring,his first step is to().
A fire in electrical equipment should be extinguished by using().
The fire of electrical equipment is classified as()fire.
A ground in an electrical circuit outside the engine room ().
A fire, occurring in the windings, of an overloaded electrical motor, is considered a ().
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