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 （）.

下列诗句中都是描写母爱的，请问哪句不是出自孟郊之手？（）

下列不是出自韩愈的成语是（）

成语：“一落千丈”出自韩愈哪首作品的哪句诗？

下列哪句话不是出自韩愈之作？（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

下面哪句话不是出自《论语》（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。