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。

什么是水文站网？水文站网布设测站的原则是什么？

从民国时期开始按近代水文科学知识布设水文测站和进行水文观测。黄河干流最早的水文站是陕县水文站和（）

在进行水文测站地形图测绘时，水文测验设施及标志、测站类型等，应使用（）中的水文制图图式绘制。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。