电信网常用的拓扑结构有哪几种形式？

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.

车体钢结构用材料有哪几类？

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

简述板桩码头按板桩材料分有哪几种结构形式，适用条件是什么？

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

常见的文件物理结构有哪几种形式。

什么是文件的物理结构？它有哪几种结构形式？