媒体根据什么标准可分为电声类媒体、光学投影类媒体、电视类媒体、计算机类媒体

报纸、杂志、广播、电视被称为现代广告的四大媒体。

Every deliberate act of wrongdoing by the master or any of the crew against the ship or cargo，without the authorization or privity of the Shipowner or his agent，is（）.

（）, 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。

计算机、PDA、视频会议系统、数字电视、CAI软件等属于交互型教育媒体。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。