题目

It’s five years since I worked here.   -----________? A.Have you worked here happily B. How long will you work here C.Where do you work now D.Do you want to work here long   答案：C函数y=36-(x-10)2的图象上存在不同的三点到原点的距离构成等比数列，则以下不可能成为该等比数列的公比的数是（　　） A、34B、3C、2D、5