In extreme weather conditions, either hot or cold, control of the air conditioning plant presents （） difficulties.

热停堆 hot shutdown

（）will normally provide sufficient information to seaward of fairway buoy or pilot station.

Every deliberate act of wrongdoing by the master or any of the crew against the ship or cargo，without the authorization or privity of the Shipowner or his agent，is（）.

（）, or drum is used for hauling in or letting out the wires or ropes which will fasten the ship to the shore.

A salvor may be（）the whole or part of the payment due under Salvage Convention to the extent that the salvage operations have become necessary or more difficult because of fault or neglect on his part or if the salvor has been guilty of fraud or other dishonest conduct.

The （） is used for hauling in or letting out the wires or ropes.

Vessels must be（）valid certificate of nationality or certificated of registry or license.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

正常停堆 normal shutdown

Which one is not the normal operation for boiler shutdown?（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。