查询选修课程好为'971001'的课程的学生学号和成绩：select stid,score from scinfo where cno=_____________
查询选修课程好为'971001'的课程的学生学号和成绩：select stid,score from scinfo where cno=_____________
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查询选修课程好为'971001'的课程的学生学号和成绩：select stid,score from scinfo where cno=_____________