用所给单词的合适形式填空Houses in the 1990s did not cost as _____(much) as they do now,did they?
题目
用所给单词的合适形式填空Houses in the 1990s did not cost as _____(much) as they do now,did they?
答案
Houses in the 1990s did not cost as【much】as they do now,did they?
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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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