如何限制可控硅直流侧的过电压？
参考答案：
通过非线性电阻来限制。
Paul eventually came to Kate's house with a police officer, ________ he was reunited with his car.[ ]
A. where
B. which
C. that
D. there
原醛症的患者可出现下列哪种代谢紊乱
A．高血钾、低血钠、酸中毒
B．低血钾、高血钠、碱中毒
C．低血钾、低血钠、碱中毒
D．高血钾、高血钠、酸中毒
