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  • 三极管输出特性曲线可分为三个区,为( )。
  • 放大器三种组态都有。( )
  • 决定齿廓渐开线形状的圆是( )。
  • 某单相桥式整流电路中,当变压器初级电压为10V,初次级匝数比为1:10则整流后输出电压为
  • No matter _____ you come. I will wait for you.
  • There _____ three bowls of rice and one plate of fish on his dinner table.
  • — _____ is it from your home to the school? — About twenty minutes' ride.
  • Do you work hard for success rather than _____ about it?
  • _____ ill in bed for nearly a month, he had difficulty passing the exam.
  • Mary isn't here at the moment. She _____ later.
  • Oh, my God! I _____ my keys at home.
  • 执行下面的程序,其结果是_________。
    int main( void )
    {
    int i,sum=0;
    for(i=1; i<=3; sum++)
    sum += i;
    printf(""%d\n"", sum);
    return 0;
    }
  • _______ late for class next time.
  • You can ask a trusted friend for_____
  • He began to learn Russian at the age of _____ .At the end of six months he had learnedenough to read articles and reports in Russian.
  • _____ you don't lose heart, you will find a way to overcome the difficulty.
  • _____ and then you will make greater progress.
  • Look at the picture. The top five TV plays _____ in it.
  • It is raining heavily outside and you ____ out now.
  • Is _____ necessary to tell her mother everything?