Where is the boy?___is at school.a he b her c she d his
题目
Where is the boy?___is at school.a he b her c she d his
答案
A ,he是“他”的意思,与boy“男孩”一致
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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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