（）, 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。

Excel数据表中分类汇总的选项包括分类字段、汇总方式两方面的内容。

Excel2003中，在创建分类汇总之前，确保要分类汇总的数据为数据清单的格式，在数据清单中允许有空行或空格。

分类汇总结束后，Excel在现有的数据清单中插入分类汇总行，在清单（）插入。

在Excel中，对数据清单进行分类汇总之前，必须对分类字段先进行（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。