题目

小明同学在利用如图所示电路进行电学实验时，闭合开关，发现灯L1亮、灯L2不亮，电流表和电压表均有示数。则故障原因是     A．灯L1断路      B．灯L1短路     C．灯L2断路       D．灯L2短路 答案：D Some college students are see doing_______work they ca find to support themselves. A. that         B. which   C. whatever     D. no matter what