题目如图所示,电源电压为6V6V6V,闭合开关后,电压表的示数为4V4V4V,则L2L_{2}L2两端的电压为( )A.2V2V2VB.4V4V4VC.6V6V6VD.10V10V10V知识点:电路的三种状态章节:未标注