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。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

与债券投资相比，下列属于股票投资特点的是

与股票投资相比，下列属于债券投资特点的是

与股票投资相比，下列属于债券投资特点的是（）。

与股票投资相比，下列属于企业债券投资特点的是（）。

相对于债券投资而言，不属于股票投资具有的特点的是（ ）。