I hope her health will have improved by the time we__ back next year.
题目
I hope her health will have improved by the time we__ back next year.
A will come B are to come C come D will have come
答案
C come
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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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