题目

—You needn't lake an umbrella. It isn't going to rain.—Well, I don't know. It do. A . might B . need C . would D . should 答案：A如图所示为物理实验室中常用的电学器材之一．那么这种工具的名称是：    ；请你指出图中所示的结构中属于绝缘体部分的是：    ．