甲、乙两烧杯分别装有浓度为500/0、10%的盐水200克，若将甲烧杯盐水的一半倒人乙烧杯，充分混合后，再将乙烧杯盐水的一半倒人甲烧杯，混合均匀后，再次将甲烧杯的部分盐水倒入乙烧杯，使得两烧杯的盐水量重新恢复到200克。则此时，甲烧杯盐水的浓度为：

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.

When loading or discharging dry mud or cement，crew members should use goggles and（）.

Effects which are dutiable or subject to prohibitions or restrictions should be declared in （）.

（）are liable to be stoten, pilfered or may damaged due to improper handing or stowage.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

甲婚前受赠一幢房屋，与乙结婚后，长期共同使用，管理该房近15年，现甲、乙双方离婚，此项房产应（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。