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。

宇宙空间的温度比恒星表面的温度（）。

宇宙绝对温度零点是（）。

绝对温度的零点是摄氏（）。

数控铣床具有零点偏置功能，绝对零点偏置功能、相对零点偏置功能、（）零点偏置功能。

以绝对真空为零点的压力计量称为绝对压力。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。