如图dgjc0031所示,当开关S打开时(____)。图<img alt="/upload/photos/20190626/be8051a390c448dfa7c565fbd8d1948e.png" src="/upload/photos/20190626/be8051a390c448dfa7c565fbd8d1948e.png" />
A.EL1不熄 B.EL2先熄 C.EL1先熄,然后EL1和EL2微亮后全熄 D.EL1和EL2同时熄正确答案C
如图dgjc0031所示,当开关S打开时(____)。图<img alt="/upload/photos/20190626/be8051a390c448dfa7c565fbd8d1948e.png" src="/upload/photos/20190626/be8051a390c448dfa7c565fbd8d1948e.png" />
A.EL1不熄 B.EL2先熄 C.EL1先熄,然后EL1和EL2微亮后全熄 D.EL1和EL2同时熄正确答案C