日历

April 2021
M T W T F S S
 1234
567891011
12131415161718
19202122232425
2627282930  

Reply To: 保变原则

Home Forums 《冒号课堂》讨论区 保变原则 Reply To: 保变原则

#1172
Todd
Member

我看的是这篇:http://im.ufba.br/pub/MATA63/Documentos/ProtectedVariation%5B1%5D.pdf

也可以google “protected variation the importance of being closed”

 请您评分1星(很差)2星(不行)3星(一般)4星(不错)5星(很棒)