题目

如图所示电路,开关S闭合后,若L1灯丝突然烧断,会发生的现象(  ) A.L1­、L2、L3均熄灭,电压表、电流表示数均为零 B.L1、L2均熄灭,L3仍然发光,电压表、电流表示数均变大 C.除L1灯不亮外,其余一切照旧,无任何其它变化   D.L1、L2、L3均熄灭,电压表示数变大,电流表示数几乎为零 答案:D    His business failure left him at the edge of desperation, but, ______ , he managed to go out of the shadow through years of efforts. A. time heals all wounds    B. don’t count your chickens before they are hatched C. no pains, no gains       D. time and tide wait for no man
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