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单项选择题

不属于消化性溃疡常见的病变部位( ) A.
胃及十二指肠 B.
食管上段 C.
空肠吻合口附近 D.
含有胃黏膜的麦克尔憩室

问答题

As the circuit shown in Fig.9-4, the characteristic of two special MOSFET is when uGS<1V, between D and S is open and when uGS>1V, there’s a resistor RON between D and S. In fact, there’s a parasitic capacitor between G and S and CGS=10pF. RON=100