627
0
20
480
0
20
703
5
20
788
0
20
465
0
20
352
3
20
756
2
20
898
0
20
653
1
20
708
4
20
308
0
19
693
0
19
641
0
19
242
0
19
1043
0
19
296
4
19
690
0
19
739
1
19
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Keyword(s): 定理