A:甲是电流表,乙、丙是电压表
B:甲是电压表,乙、丙是电流表
C:乙是电流表,甲、丙是电压表
D:乙是电压表,甲、丙是电流表
—What happened to her _______ that cold winter evening?— I don't know, and I'm also curious _______ it.
下列关于电与磁的说法中正确的是( )
水在重要的自然资源,也是生命之源.