歌剧是我国富有民族特点的歌剧，它是歌唱、对白、舞蹈、音乐以及武术、杂技、美术等相互结合，构成的独特艺术形式。

民间艺术是一切艺术的根和源。

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.

汉族的民间音乐可分为（），民间歌舞音乐，（），戏曲音乐，（）等五大类。

我国民间音乐主要分为五大类别（）、民间舞蹈音乐、说唱音乐、戏曲音乐和民间器乐。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

民间舞蹈是音乐与表演相结合的艺术，它有民间歌舞和（）两种形式。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。