— How do you think I should receive the reporter?

— _____ you feel about him, try to be polite. [ ]

A. How

B. What

C. Whatever

D. However

在500kV线路上进行等电位作业时，等电位电工对邻相导线的距离必须大于（）m。

A.4.5；

B.5.0；

C.5.5；

D.6.0。