有SQL语句： SELECT * FROM 教师 WHERE NOT (工资＞3000 OR 工资＜2000) 与如上语句等价的SQL语句是

如果教师在家需要与学生进行交流，最好采用在线学习模式离线学习。

可以在（）阶段采用Make-or-buy决策分析。

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。

在课堂教学管理中，能否与学生进行有效交流十分重要，那么教师在与学生交流的过程中需要注意（）

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

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