1133
0
21
582
0
20
567
1
20
437
0
20
390
1
20
859
1
20
426
0
20
899
2
20
910
0
20
1018
4
20
490
0
19
867
1
19
459
6
19
675
0
19
538
0
19
533
5
19
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Keyword(s): 化学反応