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 （）.

（）are liable to be stoten, pilfered or may damaged due to improper handing or stowage.

Banks have no liability for any delay or loss caused by postal or telex failure.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

所谓在教学时要“用一把钥匙开一把锁”，是指教师要有（）。

为了解决名词术语脱离事物、抽象概念脱离具体形象、理解脱离感知等矛盾，教师在教学时必须注意贯彻（）原则。

数学教育家波利亚举的例子“烧水”，说明了数学中的什么方法（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。