挑战习题
1/5单选题
难度:

1.如图下所示,当开关S闭合后,三盏灯串联的电路是(  )

A
B
C
D
提示1:
55CG6Kej5Liy6IGU55S16Lev55qE54m554K5
正确答案:QQ==
QeOAgeeUseWbvuWPr+efpeWbvkHkuK3nlLXmtYHlj6rmnInkuIDmnaHmtYHpgJrot6/lvoTvvJtC44CB55Sx5Zu+5Y+v55+l5Zu+QuS4reeUtea1geaciTPmnaHmtYHpgJrot6/lvoTvvJtD44CB55Sx5Zu+5Y+v55+l5Zu+Q+S4reeUtea1geacieS4gOadoea1gemAmui3r+W+hO+8jOS9huWFtuS4reS4gOS4queBr+azoeiiq+efrei3r++8m0TjgIHnlLHlm77lj6/nn6Xlm75E5Lit55S15rWB5pyJMuadoea1gemAmui3r+W+hO+8jOWNs+S4pOS4queBr+azoeS4suiBlOWQjuS4juWPpuS4gOS4queBr+azoeW5tuiBlO+8juaVhemAiSBB77yO