3123
1
62
1654
9
61
1321
12
61
1524
3
61
1446
17
61
1103
0
61
7856
0
61
1461
11
61
1961
5
61
1968
6
61
1356
0
61
1130
0
61
2376
0
61
2552
29
61
1083
8
61
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Keyword(s): 数学