845
2
21
813
2
21
479
0
21
1650
0
21
1291
0
21
577
0
21
442
0
21
635
0
21
735
1
21
1232
0
21
304
0
21
544
0
21
804
0
21
709
0
21
740
0
21
560
2
21
856
0
21
1294
2
21
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Keyword(s): 中2 数学