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。

出口企业出口或视同出口的下列货物，适用增值税免税并退税的有（）。

下列出口货物，适用增值税出口免税并退税政策的是（ ）。

下列货物的出口，享受增值税出口免税不退税政策的有（ ）。

下列出口货物中，适用于增值税免税但不退税政策的是()。

根据增值税法律制度规定，下列各项出口货物中，不属于享受增值税出口免税并退税政策的是()。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。