541
0
9
630
0
9
299
0
9
420
0
9
501
1
9
667
1
9
1269
2
9
392
6
9
378
0
9
898
10
9
441
0
9
2691
4
9
355
2
9
867
0
9
582
0
9
523
1
9
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Keyword(s): 数学 中2