题目内容

直流稳压电源由整流变压器、、和组成。

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由于全波整流电路充分利用了正弦交流电的正、负半周进行整流，所以输出电压，输出电流，整流的效率。相对半波整流来说，输出电压和输出电流可增加，且脉动也比较。

桥式整流电感滤波电路的输出特性比较，一般适用于的场合。

[音频]In the spy mania days of the 1960's no one could have _1that James Bond would have survived this long. James Bond survived the shock that Sean Connery was leaving the role, the end of the Cold War, the changing periods and political correctness of modern times, to name a few. Critics 2that with the departure of Sean Connery James Bond would fall apart. George Lazenby, Roger Moore, Timothy Dalton and Pierce Brosnan would in no 3terms prove that James Bond had not fallen by the way side; he was perhaps stronger than ever.While some would consider the personification of such an important role given to _4___actors impossible, James Bond has _5____on its portrayal by different actors. Each actor has given the character new and _6__ characteristics adding spice and originality whenever the series was in peril of becoming 7_.While governments have come and gone, world leaders have stepped into the spotlight and have later _8away—Bond remains. Yes, five actors have played the part of James Bond but the man himself continues; ageless, unstoppable and forever remains a9.

I m____ in chemistry.