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 （）.

关于广告传播与新闻传播的异同之处，下列表述不正确的一项是（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

新闻传播的情境因素主要有哪些？为什么要研究新闻传播的情境因素？

网络从变身为新闻传播主阵地，后来居上（）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

新闻学的研究对象就是人类社会的新闻传播现象和新闻传播活动。

试论新闻传播过程中事实、传播者与收受者之间的基本关系。