This is a saying that every c____ is not a pair
题目
This is a saying that every c____ is not a pair
This is a saying that every c____ is not a pair .
答案
couple
整句子翻译：配对未必就成双.这是英语里的一句谚语.
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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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