设L是曲线y=x3与直线y=x所围成区域的整个边界曲线，f(x，y)是连续函数，则曲线积分∫Lf(x，y)ds=()
A.∫01f(x，x3)dx+∫01f(x，x)dx B.∫01f(x，x3)dx+∫01f(x，x)√2dx C.∫01(x，x3)•√1+9x4dx+∫01f(x，x)√2dx D.∫-11[f(x，x3)√1+9x4+f(x，x)√2]dx正确答案D
设L是曲线y=x3与直线y=x所围成区域的整个边界曲线，f(x，y)是连续函数，则曲线积分∫Lf(x，y)ds=()
A.∫01f(x，x3)dx+∫01f(x，x)dx B.∫01f(x，x3)dx+∫01f(x，x)√2dx C.∫01(x，x3)•√1+9x4dx+∫01f(x，x)√2dx D.∫-11[f(x，x3)√1+9x4+f(x，x)√2]dx正确答案D
