原始问题：
1到80随机选取20个号码
17, 20, 24, 29, 31, 33, 45, 46, 49, 52, 53, 54, 57 ,58 ,60 ,63 ,65 ,68 ,71 ,75
1到80随机选取20个号码
https://www.xiaoing.com/zhidao/17630.html
1到80随机选取20个号码
17, 20, 24, 29, 31, 33, 45, 46, 49, 52, 53, 54, 57 ,58 ,60 ,63 ,65 ,68 ,71 ,75
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