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宫外孕子宫内膜为（）

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有关系S(S#，SNAME，SEX)，C(C#，CNAME)，SC(S#，C#，GRADE)。其中S#为学生号，SNAME为学生姓名，SEX为性别，C#为课程号，CNAME为课程名。要查询选修“数据库”课的全体学生姓名的SQL语句是SELECT SNAME FROMS，C，SC WHERE子句。这里的WHERE子句的内容是()。

A. S.S#=SC.S# AND C.C#=SC.C# AND CNAME=‘数据库’
B. S.S#=S C.S# AND C.C#=S C.C# AND CNAME IN‘数据库’
CNAME‘数据库’
D. CNAME=‘数据库’

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A．makingB．makesC．causesD．causing

A. making
B. makes
C. causes
D. causing

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Why does the drop-out rate of college students seem to go up？______

A. Young people are disappointed with the conventional way of teaching at college
B. Many young people are required to join the army
C. Young people have little motivation in pursuing a higher education
D. Young people don't like the intense competition for admission to graduate school

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【B10】

A. in
B. by
C. on
D. through

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