c语言输入两个字符，交换输出

be什么时候用原形 而不要变成am is are 什么时侯才会用到am,is,are的原型be?什么时候用原型be什么时候用am is are .我是英语初学者。比如 he will be happy.在这地方用be我就不明白、 be是am is are 的原型吗 on behalf of 怎么用?I on behalf of myself. 需要加be动词吗? on behalf of的用法与例句 on behalf of 和on the behalf of 区别 我是初中生,求一篇the relationship between parents and children的短篇演讲材料.最好是写的~ The Chinese are a great people为什么是are The chinese are a great people中的Are怎么和a一起用了? stand for 与 represent区别在用法上有区别吗？ on behalf of与stand for represent 与stand for的区别 “要相信他是爱你的”英文怎么写?要自已翻译的,正确 提单SHIPPER上 A公司 ON BEHALF OF B公司 怎样背书?只有A公司背书可以吗?或者是要两者背书? on behalf of 希腊神话分别体现了哪些人文主义?请举几个希腊神话的例子例如举一些体现人的感情（比如母爱）的神话必须是希腊神话,必须是人文主义一定要详细答道分别体现了哪些人文主义?我现在急 有没有什么关于希腊神话的动漫啊. on the behalf You should always speak English in class.And you should write down your mistakes in your notebooks.求翻译 You should speak English in English class.(写出同义句） You ( ) ( ) （ ）speak English in English My heart was hurt 可能有语法错误? 罗志祥的touch my I feel my heart start trembling with you 什么意思? my heart also but you also suspected of my my heart was beating quickly. you are reading english i am __ reading english填什么 What book are you reading,Tom?_____book about _____moon.A.A;a B.A;the C.The;the D.The;a不求最快 求最好 不过要在10点之前 When you are reading something in English ,you may often meet with a new word .What.根据短文回答问题 世界四大沙漠 中国四大沙漠 内蒙四大沙漠 分别按顺序排出来 关于希腊神话中的诸神,给一点简单介绍 Certificate Of Origin FORM E是什么(请高手指路,外贸类）一个来自印度尼西亚的客户要求我们以后给他这个东西,好像是产地证,可是我给贸促会打电话,他让我们找商检局,商检局电话暂时打不通,这