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The STUDENT_GRADES table has these columns: The register has requested a report listing the students' grade point averages (GPA), sorted from highest grade point average to lowest within each semester, starting from the earliest date. Which statement accomplishes this?（）
A:SELECT student_id, semester_end, gpa   FROM student_grades   ORDER BY semester_end DESC, gpa DESC;
B:SELECT student_id, semester_end, gpa   FROM student_grades   ORDER BY semester_end ASC, gpa ASC;
C:SELECT student_id, semester_end, gpa   FROM student_grades   ORDER BY semester_end, gpa DESC;
D:SELECT student_id, semester_end, gpa   FROM student_grades   ORDER BY gpa DESC, semester_end DESC;
E:SELECT student_id, semester_end, gpa   FROM student_grades   ORDER BY gpa DESC, semester_end ASC;

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出自：Oracle认证

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