2-1=?wei shen me

2-1=?wei shen me wei shen me为什么 zhe shi wei shen me wei shen me zhe me nan? wei shen me ren shen na me jing ren wei shen me yao chi fan wei shen me da bu hu zi wei shen me hua yao diao xie wei shen me wo shi sb? wei shen me wei shen me jin nian tian zai zhen me dou ne? wei shen me A 0 0 B = |A||B| 其中A,B为方阵 小明家有2只羊,又买了3只,wei shen me 我国森林海岸的气候wei shen me de 荒漠中的骆驼,尿液非常少wei shen me wei shen me shu ru fa zong shi ying wen wei hun xian yu shen me yi si? wei shen me zhi neng da yingwen l Nobody --------[know] how to do it?wei shen me?