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 （）.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

下列行为违反民法私法自治原则的是（）。

下列不属于违反公序良俗原则的行为的是（）。

下列各项不属于违反公序良俗原则的是（）。

下列选项中，不属于违反公序良俗原则的行为有( )。

属于违反公序良俗原则的行为有（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。