（）, or drum is used for hauling in or letting out the wires or ropes which will fasten the ship to the shore.

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。

负责组织水利水电工程专业承包一级资质施工企业管理人员水利水电工程安全生产知识和能力考核的部门是（）。

负责组织水利水电工程专业承包一级资质施工企业管理人员水利水电工程安全生产知识和能力考核的部门是()。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

水利工程施工导流设计流量是指导流时段内按导流标准选择相应洪水重现期的（）流量。

水利工程施工导流设计流量是指导流时段内按导流标准选择相应洪水重现期的（）流量。