Father gave me is yuan and I am going to buy a dictionary__ the money .A,by B,in C,with
题目
Father gave me is yuan and I am going to buy a dictionary__ the money .A,by B,in C,with
为什么
答案
C with
buy sth with money 用钱买某物
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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．
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