挑战习题
1/5单选题
难度:

1.

如图所示的电路中,开关S、S1闭合时的等效电路(  )


A

B

C

D

提示1:
PHA+562J5pWI55S16Lev5LiJ5LiN55S777ya5LiN55S755S15rqQIOOAgeS4jeeUu+W8gOWFs+OAgeS4jeeUu+eUteihqDwvcD4=
提示2:
PHA+5byA5YWzU+OAgVM8c3ViPjE8L3N1Yj7pl63lkIjml7bvvIzlj6rmnInnga9MPHN1Yj4xPC9zdWI+5o6l5YWl55S16LevPGJyPjwvcD4=
正确答案:RA==
PGRpdj7lvIDlhbNT44CBUzxzdWI+MTwvc3ViPumXreWQiOaXtu+8jOWPquacieeBr0w8c3ViPjE8L3N1Yj7mjqXlhaXnlLXot6/vvIzkvYbmmK/nrYnmlYjnlLXot6/ml6DnlLXmupDjgIHlvIDlhbPku6Xlj4rnlLXooajvvIzliJlE5q2j56GuPGJyPjwvZGl2Pg==