when shopping in a store,i met a young man ,when i saw the boy waving his
题目
when shopping in a store,i met a young man ,when i saw the boy waving his
求是这篇短文,只记得开头只这样
答案
When shopping in a store,I met a young man．When I saw the boy waving his hands excitedly in the air and shouting in a loud voice,“Mommy,I'm over here．”I knew he was mentally(精神上)challenged．I a...
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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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