SQL的数据操作语句不包括（）。

A．SELECT 学号,姓名,性别 FROM S WHERE EXISTS (SELECT * FROM SC WHERE SC.学号=s.学号 AND 成绩<=85)
B．SELECT 学号,姓名,性别 FROM S WHERE NOT EXISTS (SELECT * FROM SC WHERE SC.学号=s.学号 AND 成绩<=85)
C．SELECT 学号,姓名,性别 FROM S WHERE EXISTS (SELECT * FROM SC WHERE SC.学号=S.学号 AND 成绩>85)
D．SELECT 学号,姓名,性别 FROM S WHERE NOT EXISTS (SELECT * FROM SC WHERE SC.学号=S.学号 AND 成绩<85)

A．DROP FROM 订单 WHERE 签订日期<={^2004-l-10}
B．DROP FROM 订单 FOR 签订日期<={^2004-l-l0}
C．DELETE FROM 订单 WHERE 签订日期<={^2004-1-10}
D．DELETE FROM 订单 FOR 签订日期<={^2004-l-10}