绝热工程和绝热材料各是指什么？

吸声材料分为（）吸声材料和（）吸声材料，其中（）是最重要、用量最大的吸声材料。

在工程上，通常把室温下导热系数()的材料称为绝热材料。

绝热材料与吸声材料一样，都需要孔隙结构为封闭孔隙。（）

吸声材料在孔隙结构上与绝热材料有何区别？为什么？

试阐述不同吸声材料和建筑吸声结构的性能、作用。

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.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。