跪求英语演讲稿,serve,not to be served
题目
跪求英语演讲稿,serve,not to be served
不要太难的词汇了~控制在三分钟以内~
1分钟就可以啦！
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The other day I was talking to someone from northern China on MSN,who is now in England.She mentioned that she didn't like people criticise the central government as it didn't look good.But since when...
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已知函数f（x）=x，g（x）=alnx，a∈R．若曲线y=f（x）与曲线y=g（x）相交，且在交点处有相同的切线，求a的值和该切线方程．
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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