597
0
49
799
2
49
875
0
49
549
0
49
864
8
49
542
4
49
921
6
49
503
4
48
474
5
48
840
8
48
759
0
48
822
8
48
940
19
48
943
8
48
1494
6
47
814
2
47
2538
14
47
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Keyword(s): 数学 中学生