He knew there was someone on this earth who cared for him deeply 翻译
题目
He knew there was someone on this earth who cared for him deeply 翻译
答案
他知道这个地球上一直有一个人很关心他
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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