His brother has eaten a lot of vegetables.(就划线部分提问)_________ ________his brother eaten?
题目
His brother has eaten a lot of vegetables.(就划线部分提问)_________ ________his brother eaten?
a lot of vegetables为划线部分
答案
what has his brother eaten?
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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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