The only problem with the debate last week was that the beginning sounded more like a personal attack than a dispassionate, intellectual arguing.

A．discussion

B．argument

C．talk

D．speech

时差校正用于减少甚至消除什么？（）

A.频率偏差

B.频率累计误差

C.区域控制偏差

D.联络线功率累计误差