表达条件“学生所在系不是计算机系(Sdept = 'CS')、数学系(Sdept = 'MA')和信息系(Sdept = 'IS')”，应该用 A: Sdept NOT IN('CS', 'MA', 'IS') B: Sdept <> 'CS' ANDSdept <> 'MA' ANDSdept <> 'IS' C: Sdept != 'CS' ANDSdept != 'MA' ANDSdept != 'IS' D: 以上都对
表达条件“学生所在系不是计算机系(Sdept = 'CS')、数学系(Sdept = 'MA')和信息系(Sdept = 'IS')”，应该用 A: Sdept NOT IN('CS', 'MA', 'IS') B: Sdept <> 'CS' ANDSdept <> 'MA' ANDSdept <> 'IS' C: Sdept != 'CS' ANDSdept != 'MA' ANDSdept != 'IS' D: 以上都对
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