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.

为什么把系统科学作为环境地质学的基础理论？

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

地质构造是地质作用的产物，根据地质营力的能源划分，形成地质构造的地质作用分为（）两种作用。

隧洞选线时在地形地貌、地层岩性、地质构造，以及水文地质和自然地质现象方面，应注意哪些问题？

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

工程环境的好坏主要由工程区地质构造、（）、地貌、水文地质条件决定。