写英语作文.不少于5句话.非常急~
题目
写英语作文.不少于5句话.非常急~
比较猪、马和猎豹的奔跑能力.参考词汇：faster than,thefastest……
答案
The cheetah is the fastest animal out of the animals pig,horse,and cheetah.The pig is the slowest of the three.The cheetah is faster than both the horse and the pig.The horse is faster than the pig.However,it is slower than the cheetah.The pig is slower than both the cheetah and the horse.
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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