1849
4
27
1037
0
27
1655
9
27
861
2
27
889
4
27
1885
0
27
943
8
26
1103
6
26
508
6
25
616
0
24
496
0
24
911
0
24
577
6
24
829
3
24
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Keyword(s): 中学数学