689
0
19
644
2
19
2467
1
18
1058
5
18
429
0
18
488
3
18
895
1
18
1023
10
18
1212
0
18
918
0
17
994
0
17
885
0
17
506
0
17
1577
10
17
885
0
16
1231
0
16
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Keyword(s): 数学A