函数$y=lg(\frac{2}{1+x}-1)$的图像关于（     ）

    Hello! My name is Amy. I am eleven years old. I like yellow. That's my favourite colour. I like to draw pictures, and that's my favourite school work. My favourite food is hamburgers. I like hamburgers for lunch. I like my Chinese teacher, so my favourite subject is Chinese. I like my yellow dress very much.