求一篇英语演讲稿60~80词
题目
求一篇英语演讲稿60~80词
以an unforgettable travel为题
答案
Now wanted everything to use English.English of involve noodles more wide.come out society,if will not speak English to also be equal to language to have some obstacle.particularly for 80 empress of y...
举一反三
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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