题目曲线y=ln x在x=1处的切线方程为______A. y=-x-1B. y=-x+1C. y=x+1D. y=x-1曲线$y=\ln x$在x=1处的切线方程为______A. y=-x-1B. y=-x+1C. y=x+1D. y=x-1题目解答答案D. y=x-1