生活经验告诉我们，学校的电灯、光管、风扇、插座的连接方法是： [ ]
A.串联
B.只有电灯是并联
C.并联
D.只有电灯和插座并联
答案：C
— Have you made an apology____him ____breaking his window?
— Yes, I have. [ ]
A. for; to
B. to; to
C. for; for
D. to; for
变压器的运行电压一般不应高于该运行分接额定电压的105%（）
