各位、、有谁可以帮我找到一张原子构造原理图??谢谢!!

2010-11-24 23:10 来自版块 - 

Mr Green fell in love with a big house with a beautiful garden------he couldn't afford it.A for B but C so D ... 全文

2010-11-24 22:55 来自版块 - 

有丝分裂的后期、着丝点分裂、需要酶吗(⊙_⊙)?为什么嘞??

2010-11-12 23:15 来自版块 - 

——(be) not only the students but also their teacher required to attend the meeting?答案是Are..但是根据就近原则. not only A but also B是根据B来说的啊...可为什么会是a... 全文

2010-11-07 22:52 来自版块 - 

课本上说:规定零向量与任意的向量是共线向量,也就是平行向量,但是零向量与任意的向量垂直吗??如果说零向量与任意的向量平行的话,也就是与任意的向量垂直啊!但是课本上并没有这么说...那到底零向量与任意的向量是否垂直呢??谢谢大家了!!

2010-10-10 23:29 来自版块 - 


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