415
0
16
889
0
16
1060
0
16
478
0
16
1053
0
16
406
0
15
950
0
15
632
0
15
1590
0
15
2726
0
15
305
0
15
377
0
15
382
0
15
1901
0
15
1027
0
15
768
0
15
585
0
15
1578
2
15
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Keyword(s): 数学b