She gave () A、to him a meal B.a meal for him C.him to a meal D.a meal to him
题目
She gave () A、to him a meal B.a meal for him C.him to a meal D.a meal to him
答案
D ( give sth to sb 给某人某物)
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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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