【单选题】【消耗次数：1】
在放大电路中，若测得某管的三个极电位分别为–2.5V、–3.2V、–9V，这三极管的类型是()。
①
PNP型锗管
②
PNP型硅管
③
NPN型锗管
④
NPN型硅管
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令电流参考方向为流入三极管，在线测得某三极管三个管脚的电流分别为，下列说法中正确的有。
①
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