【简答题】【消耗次数:1】
晶体管控制无触点电子点火系可[填空]初级电流.从而提高次级电压.
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相关题目
【简答题】 无触点电子点火系用[填空]代替断电器的触点,产生点火信号.
【判断题】 晶体管可以把小电压放大成大电压。
①  正确
②  错误
【单选题】 传统点火系与电子点火系统最大的区别是( )
①  点火能量的提高
②  断电器触点被点火控制器取代
③  曲轴位置传感器的应用
④  点火线圈的改进
【简答题】 无触点式电子闪光器又称[填空]闪光器
【单选题】 普通电子控制点火系统由( )控制点火线圈的通断。
①  ECU
②  点火控制器
③  分电器.
④  转速信号
【单选题】 传统点火系统系与电子点火系统最大的区别( )
①  点火能量的提高
②  断电器触电被点火控制器取代
③  曲轴位置传感器的应用
④  点火线圈的改进
【单选题】 晶体管在大电流工作时,随Ic的增加β值将( )。
①  增加
②  下降
③  不变
【单选题】 β相同的晶体管组成复合管后,其电流放大系数约为( )。
①  β
②  β的平方
③ 
【判断题】 处于放大状态的晶体管,集电极电流是多子漂移运动形成的。()
①  正确
②  错误
【单选题】 晶体管的主要特性是具有()。
①  单向导电性
②  滤波作用
③  稳压作用
④  电流放大作用
随机题目
【单选题】 ____ it was finished in time.?
①  As the work was difficult ?
②  Difficult as the work was?
③  Difficult as was the work ?
④  As was the work difficult?
【单选题】 When we came back, he found his bicycle ____
①  was stolen
②  had stolen
③  had been stolen
④  is stolen
【单选题】 ____ his illness, he came to the meeting.
①  Though
②  Because
③  Despite
④  Therefore
【单选题】 The doctors give the students a medical____ for their health once a year.
①  inspection
②  investigation
③  experiment
④  examination
【单选题】 6. The company ____ that their product “makes you thin without dieting”.
①  claims
②  demands
③  collects
④  allows
【单选题】 He ____the tears on her face when he heard the relatives walking into the room.
①  put off
②  came out
③  wiped away
④  move on
【单选题】 This ATM has been out of service for a few days. It should ____ last week.
①  be fixed
②  have fixed
③  fix
④  have been fixed
【单选题】 7. As soon as they heard the teacher say, “Dinner is ready,” the children made a dash ____ the dining-hall.
①  for
②  at
③  into
④  up
【单选题】 Jane: I’d like to have some ice cream if you don’t mind. Man: ____. Help yourself.?
①  of course ?
②  Yes, I do ?
③  Oh, yes ?
④  Of course not?
【单选题】 3. He admits that playing computer games sometimes____ him ____his study.
①  distracts--from
②  attracts--from
③  distracts--to
④  attracts--to