成语多是四音节，也有三音节和四音节以上的；惯用语多是三音节，也有超过三音节的，你如何区别成语和惯用语？

汉字速记中，暗示必定语气的三音节词，快速书写时，写出第一个音节，后面的两个音节就用“d”字母，附写在第一个音节的（）庖代。

汉字速记中，表示肯定语气的三音节词，快速书写时，写出第一个音节，后面的两个音节就用“d”字母，附写在第一个音节的()代替。

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。

HSK考试分为基础汉语水平考试、____汉语水平考试、高级汉语水平考试三种，共分为____级。

将“立场、观点、方法”略写为“立3”是运用了()略写法。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。