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【单选题】
That's ___ you are wrong． You skipped Step TwoA.
where
B.
how
C.
what
D.
when
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【判断题】稳压管稳压电路电路简单，使用方便，但该电路稳压值由稳压管的型号决定，调节困难，稳压精度不高，输出电流也比较小；为解决这一问题，可以采用串联型稳压电路。
A.
正确
B.
错误
【简答题】稳压管稳压电路中限流电阻的作用是______。为了使电路能够稳压且满足输出电流要求，通常应选择稳压管的最大工作电流满足______的关系。
【简答题】设硅稳压管 和 的稳定电压分别为10 V 和5 V ,求图中电路的输出电压 。已知稳压管的正向压降为 0.7V 。
【简答题】稳压管稳压电路中限流电阻的作用是__________。为了使电路能够稳压且满足输出电流要求，通常应选择稳压管的最大工作电流满足__________的关系。
【单选题】Zhanglin was lost in computer games during his last year in high school, otherwise he _____ a student at Beijing University.
A.
would have been
B.
can be
C.
has been
D.
had been
【简答题】A high school in Hiroshima City has been the first to do something with DNA in the world. Its students have won praise not only for doing this research but also for presenting their findings to groups...
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