what is that in your hand?
题目
what is that in your hand?
答案
what is that in your hand?你的手里面是什么?；你手上拿的是什么?例句1.The LORD said to him,"What is that in your hand?" He said,"A staff."耶和华对摩西说：「你手里是什麽?」他说：「是杖.」2.After three or...
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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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