急求幼儿英语小故事2-3篇,5岁孩子用,60-70个单词,单词最好不要太复杂,
题目
急求幼儿英语小故事2-3篇,5岁孩子用,60-70个单词,单词最好不要太复杂,
还有没有再短些的，
答案
The Old Cat An old woman had a cat. The cat was very old; she could not run quickly, and she could not bite, because she was so old. One day the old cat saw a mouse; she jumped and caught the mouse. ...
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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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