We offered him our congratulations ______ his passing the college entrance exams.
A.
at
B.
of
C.
for
D.
on
拍照语音搜题,微信中搜索"皮皮学"使用
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【单选题】设学生选课关系模式为SC(Sno,Cno,Grade),其中,Sno为学号,Cno为课程号, Grade为成绩,SQL查询语句如下: SELECT Sno FROMSC SCX WHERE NOT EXISTS (SELECT* FROM SC SCY WHERE SCY.Sno='1042'AND NOT EXISTS (SELECT * FROMSCSCZ WHERE SCZ.Sno=SCX....