“中华开国五千年，神州轩辕自古传。创造指南针，平定蚩尤乱。世界文明，唯有我先。”孙中山先生所指的是[ ]

A．炎帝的功绩

B．黄帝的功绩

C．禹的功绩

D．尧的功绩

Leading cadres launch rectification campaigns at regular______to hear the masses'views.

A．interaction

B．intervals

C．interruptions

D．interpretation