（）制动是利用转向架上的电磁铁和电磁感应体的相对运动引起电涡流产生电磁力而形成制动力。

A、盘形

B、涡流

C、动力

D、电磁

—You must be tired out after the climbing.

—Oh, _____. I felt too tired to move. [ ]

A. not a bit

B. not a little

C. not at all

D. not nearly