如图所示电路中,R<sub>1</sub>=50Ω/1W,R<sub>2</sub>=100Ω/W,当开关S闭合时,将使()。<br /> <img src="https://nimg.ppkao.com/2018-09/tangxueping/2018090211120012251.jpg?sign=264fbbde2e28df0fba0901d45b04d90d&t=62d0fd3f" />
A、R1烧坏,R2不会烧坏
B、R1,R2均烧坏
C、R1未烧坏,R2烧坏
D、R1,R2均未烧坏