990
0
53
12481
0
53
1786
7
53
1247
0
53
763
4
53
2331
3
53
2037
5
53
1598
6
53
2491
2
53
2355
3
53
1514
3
53
1819
10
52
1525
6
52
1906
5
52
1714
0
52
1457
0
52
1843
17
52
1205
8
52
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Keyword(s): 数学