667
2
19
2501
1
18
1080
5
18
438
0
18
494
3
18
1206
0
18
1023
1
18
1034
10
18
1337
0
18
1803
10
18
950
0
17
1009
0
17
963
0
17
524
0
17
913
0
16
1255
0
16
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Keyword(s): 数学a