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【简答题】
二极管的正向特性明显分为两个区域,分别是 和 ;对硅管而言,这两个区的电压大致为 和 。
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举一反三
【简答题】理想集成运放的 CMRR=
【单选题】The common mode rejection ratio (CMRR) is the ratio of _______.
A.
the difference mode gain to the common mode gain
B.
the common mode gain to the difference mode gain
C.
noninverting gain to inverting gain
D.
inverting gain to noninverting gain
【单选题】Timothy Stow of Inver Grove Heights, Minn. worked hard, exercised often and thought he got plenty of sleep. Yet he never felt rested. The 20-year-old salesman dozed off during meetings and had four ca...
A.
Now when he retires, he straps over his nose a soft rubber mask connected to a small unit that supplies just enough air pressure to hold his airway open so he can breathe continuously.
B.
Finally his doctor sent him to the Minnesota Regional Sleep Disorders Center in Minneapolis.
C.
Later, at the end of each run of snores comes a brief breath-holding spell.
D.
Doctors soon realized that Stow was a victim of sleep apnea.
E.
Many people have chronic sleep problems.
F.
Placed in a quiet room, Stow went to sleep at his usual time. (46)
【简答题】休克缺血性缺氧期发生的急性肾衰竭属于______，休克难治期发生的急性肾衰竭属于______。
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