真的吗？

http://www.cartage.org.lb/en/themes/sciences/chemistry/miscellenous/Helpfile/Erroranalysis/AdditionSubtraction/AdditionSubtraction.htm

所有跟帖： 

• got it thanks -lilipp- ♀ (0 bytes) () 05/11/2012 postreply 17:16:57

• 提醒我了，陈醋在这里 -用户名被占用了- ♂ (302 bytes) () 05/11/2012 postreply 17:19:34

• yeah, the link is in the plus/minus.. i found it. -lilipp- ♀ (0 bytes) () 05/11/2012 postreply 17:21:01

• 丽丽教授到网上来找答案，真要是申请NIH基金的，她直接找统计博士去了 -用户名被占用了- ♂ (0 bytes) () 05/11/2012 postreply 19:12:16

• xixi, 我不好意思问一起工作的统计博士，太简单 LOL -lilipp- ♀ (0 bytes) () 05/11/2012 postreply 20:44:16