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S1 C1 A. S1. S1 C2 A. S2 C1 A. S2. S2 C3 B. S3 C1 B. S3. S3 C2 B. S4 C1 A. S4. S4 C2 A. S4 C3 A. S1 C1 A. S1. S1 C2 A. C1. S2 C1 A. S2. S2 C3 B. S3 C1 B. S3. S3 C2 B. S4 C1 A. S4. S4 C2 A. S4 C3 A. S1 C1 A. S1. S1 C2 A.
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S1 C1 A S1 S1 C2 A S2 C1 A S2 S2 C3 B S3 C1 B S3 S3 C2 B S4 C1 A S4 S4 C2 A S4 C3 A
S1 C1 A S1 S1 C2 A C1 S2 C1 A S2 S2 C3 B S3 C1 B S3 S3 C2 B S4 C1 A S4 S4 C2 A S4 C3 A
S1 C1 A S1 S1 C2 A S2 C1 A S2 S2 C3 B C2 S3 C1 B S3 S3 C2 B S4 C1 A S4 S4 C2 A S4 C3 A
S1 C1 A S1 S1 C2 A S2 C1 A S2 S2 C3 B S3 C1 B S3 S3 C2 B C3 S4 C1 A S4 S4 C2 A S4 C3 A
下面我们来求选修了C3课程的学生的学号 S1 C1 A S1 S1 C2 A S2 C1 A S2 S2 S2 C3 B S2 C3 B S3 C1 B S3 S3 C2 B C3 C3 S4 C1 A S4 S4 S4 C2 A S4 C3 A S4 C3 A REPLAY