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三极管输出特性曲线可分为三个区,为( )。
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放大器三种组态都有。( )
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决定齿廓渐开线形状的圆是( )。
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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
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No matter _____ you come. I will wait for you.
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There _____ three bowls of rice and one plate of fish on his dinner table.
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— _____ is it from your home to the school? — About twenty minutes' ride.
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Do you work hard for success rather than _____ about it?
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_____ ill in bed for nearly a month, he had difficulty passing the exam.
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Mary isn't here at the moment. She _____ later.
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Oh, my God! I _____ my keys at home.
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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;
}
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_______ late for class next time.
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You can ask a trusted friend for_____
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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.
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_____ you don't lose heart, you will find a way to overcome the difficulty.
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_____ and then you will make greater progress.
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Look at the picture. The top five TV plays _____ in it.
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It is raining heavily outside and you ____ out now.
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Is _____ necessary to tell her mother everything?
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