2064
16
53
502
0
53
2207
12
53
1035
0
53
951
0
53
12170
0
53
1558
7
53
1802
5
53
1135
0
53
1830
4
53
739
4
53
2187
3
53
2552
21
53
1874
5
53
1423
6
53
2204
2
53
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Keyword(s): 数学、