550
0
18
561
0
18
508
5
18
316
0
18
738
0
18
918
3
17
361
0
17
1664
0
17
457
0
17
891
2
17
637
4
17
695
2
17
545
5
17
1259
2
17
825
0
17
447
0
17
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Keyword(s): 中1数学