若要求“查询选修了3门以上课程的学生的学生号”，正确的SQL语句是（ ）。A．SELECT S# FROM SC GROUP BY S# WHERE COUNT（*）>3B．SELECT S# FROM SC GROUP BY S# HAVING COUNT（*）>3C．SELECT S# FROM SC ORDER BY S# WHERE COUNT（*）>3D．SELECT S# FROM SC ORDER BY S# HAVING COUNT（*）>3

翻译：With Average or With Particular Average（WA or WPA）（）

SELECT COUNT（DISTINCT Sno） FROM  SC 语句用于统计学生的总人数。

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

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

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。