![](https://lstatic.shangxueba.com/sxbzda/h5/images/m_q_title.png)
链霉素的组成部分有
A.克拉定糖
B.链霉胍
C.N-甲基葡萄糖
D.葡萄糖
E.链霉糖
![](https://lstatic.shangxueba.com/sxbzda/h5/images/tips_org.png)
第9题
A.SELECT S.SNO,SN FROM S,SC,C WHERE CN='数据库' AND S.SNO=SC.SNO AND C.CNO=SC.CNO;
B.SELECT SC.SNO,SN FROM S,C,SC WHERE CN='数据库' AND S.SNO=SC.SNO AND C.CNO=SC.CNO;
C.SELECT SC.SNO,SN FROM S,SC,C WHERE S.SNO=SC.SNO AND C.CNO=SC.CNO AND CN='数据库';
D.SELECT S.SNO,SN FROM (S INNER JOIN SC ON S.SNO=SC.SNO) INNER JOIN C ON SC.CNO=C.CNO WHERE CN='数据库';
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