题目

My mother has little interest in football ___________ she didn't watch the live match on TV yesterday evening. A . so B . if C . though D . when 答案：A（2012?北京）如图所示的电路中，将开关S闭合，灯L1和灯L2均发光，则下列说法中正确的是（　　）A．灯L1和灯L2并联B．灯L1和灯L2串联C．通过灯L1和灯L2的电流一定相等D．灯L1和灯L2两端的电压一定不相等