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【简答题】
已知S#:，SN:姓名，SD:班级，CN:课程，G:成绩。下列属于2NF的关系模式是 _________。
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皮皮学刷刷变学霸
举一反三
【单选题】Three times the accused was brought to court for trail, he was sentenced half a year’s imprison
A.
176. Three times the accused was brought to court for trail, he was sentenced half a year’s imprisonment by the _____. A．lawyer
B.
official
C.
officer
D.
Judge
【简答题】通用定时器的线圈失电时被复位,复位后其常开触点(__) ,常闭触点 (__),当前值为(__) 。