Our monitor took part in several competitions actively.（保持句意不变）.
题目
Our monitor took part in several competitions actively.（保持句意不变）.
Our monitor took（ ）( ) part in several competitions
答案
Our monitor took (an active) part in several competitions
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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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