现代教育媒体主要是指在教育、教学中使用的各种设备。

在现代教育技术环境下，媒体被认为是教学的基本要素之一。

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.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

简述“经验之塔”理论对媒体选择的指导意义。

现代教育理论认为，教学的本质是（ ）

（）在1946年所著的《教学中的视听方法》一书中提出了“经验之塔”的理论。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。