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。

以下哪些是适用于规模较大企业的组织机构类型。（）

直线式组织结构适用于规模较大、管理任务繁重复杂的企业。

（）组建综合营销团队适用于规模较大、人员数量较多的网点

（）方法适用于月末在产品数量较多，各月在产品数量变化也较大，且生产成本中直接材料成本和直接人工等加工成本的比重相差不大的产品。

西安邮电大学目前研究生教育规模近多少人？（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。