鉴于学期即将结束，逼人meal plan太多用不完，房间已经囤积了一堆食物，为了继承中华民族的传统美德，粒粒皆辛苦，我希望能有很多很多人帮我把我这里的粮食吃完。每天夜宵供应，各种面包，baco，seafood salad, roast beef salad(at times), egg salad, vegetable salad, chips, drinks等等等等。。。现奉上照片一张，欢迎大 ...

我有个朋友想搞个有关藏独的座谈会，需要一面布的中国国旗不知道哪位方便借一下？先谢过了！

Need help in number theory:(1) If a is rational, b is irrational, prove that a+b is irrational.(2) if a is rational, b is irrational, prove that ab is irrational, for a != 0. This is like common sense... How to prove it?? 

RT