下列楼板中，（）的撞击声隔声性能最好。

职业道德可以调节礼仪主持人与受众之间的关系。

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。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

楼层隔声的重点是对撞击声的隔绝，可从（）方面进行改善。

楼板撞击声隔绝措施有（）。

楼层隔声的重点是对撞击声的隔绝，其中（）不利于楼地面隔声的改善。