— stop are there to the airport?there A.how long B.how soon C.how often D.how many
题目
— stop are there to the airport?there A.how long B.how soon C.how often D.how many
是three
答案
D.how many
How many stops are there to the airport?
机场（公车）停多少站?
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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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