I insisted _____ to see a doctor, but he insisted nothing ____ wrong with him.

A．on him to go; should be

B．he went; be

C．he go; was

D．he should go; is

当过电压作用变压器时，为了尽力使绕组上的起始电压和最终电压分布一致，且不发生振荡，通常的办法是（）。

A.采用避雷器保护

B.加强绕组的绝缘强度和改善电容的分布

C.采用增加阻尼的措施

D.改变阻抗电压大小