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DownLoadFile(urls, dir, n, ty)
DownLoadFile(urls, dir, n)
DownLoadFile(urls, dir)
DownLoadFile(urls)

urls : ַ洢Ķ
dir  : ļĿ¼, ĬϽѡ񱣴Ŀ¼
n    : ߳Ŀ,ĬΪ6
ty   : ؽȱ־,Ϊ0ʱӡ,Ϊ1ʱӡ, ĬΪ0

˵:
1. ֶ֧ļ,ÿļ洢urlsӦԪＴ
2. ִгɹ, һض, ʹ{DownLoadInfo<\DownLoadInfo>}鿴ǰصһЩϢ, ʹ{DownLoadPause<\DownLoadPause>},{DownLoadContinue<\DownLoadContinue>}ͣͼ
3. һ"/"ıΪļ

ӣ
DownLoadFile("http://table.finance.yahoo.com/table.csv?s=900957.ss")