题目内容
晶体三极管截止时，他的两个PN结都是正向偏置。
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三极管工作在放大区时，各级电流的分配关系满足IE=IC+IB,IC≈β×IB
NPN管发射结正偏VB
“I mow your lawn,” he said.The sentence is repeated many times. That’s because it shows Tony’s determination in finding a job, although he knew nobody would like to help him.
My wife and I were delighted with what we felt was a satisfying end of the story.we can paraphrase this sentence into:My wife and I were happy with what Tony had achieved, and thought that the whole thing had thus been settled.
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