题目

I know nothing about the young lady _______she is from Beijing.A. except              B. except for C. except that            D. besides 答案：C6．若函数y=f（x）（x∈R）满足f（x+1）=f（x-1）且x∈[-1，1]时，f（x）=1-x2，函数g（x）=$\left\{\begin{array}{l}{lgx，x＞0}\\{-\frac{1}{x}，x＜0}\end{array}\right.$，则实数h（x）=f（x）-g（x）在区间[-5，5]内零点的个数为8．