A. SELECT * TOP 10 FROM 选课 ORDER BY 成绩 WHERE 课程号="101" B. SELECT * PERCENT 10 FROM 选课 ORDER BY 成绩 DESC WHERE 课程号="101" C. SELECT * TOP 140 PERCENT FROM 选课 ORDER BY 成绩 WHERE 课程号="101" D. SELECT * TOP 10 PERCENT FROM 选课 ORDER BY 成绩 DESC WHERE 课程号="101\