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。

语言学已历经了传统语言学、历史比较语言学和现代语言三个阶段。现代语言学的正式开端是（）.

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

声母中的鼻音是（）

由儿和尔构成的字一般都是鼻音声母。

现代汉语中的零声母来源于中古的哪些声母？

以下哪个汉字的声母不是鼻音声母（）。