A:将开关闭合,三个灯都发光.灯L1、L2先并联.再与L3串联
B:将开关闭合,三个灯都发光,灯L1、L2、L3是并联
C:将开关闭合,灯L1、L2被导线直接接在两端,只有灯L3发光
D:将开关闭合,灯L2、L3被导线直接接在两端,只有灯L1发光
The Greens ________live in the south of Asia . They don't want to move to the north because they ________ the cold weather.