550
2
7
512
0
7
676
0
7
440
0
7
1319
0
7
189
2
7
779
2
7
773
0
7
593
0
7
347
0
7
514
0
7
673
0
6
373
2
6
416
0
6
309
0
6
606
0
6
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Keyword(s): 数学 中2