人民警察的录用与国家公务员的录用一样，贯彻( )、平等、竞争、择优的原则。

A．公平
B．公正
C．公道
D．公开

During the day，a vessel picking up a submarine cable shall carry（）.

A.three shapes，the highest and lowest shall be red balls，and the middle shall be a white diamond

B.two black balls

C.three shapes; the highest and lowest shall be black balls，and the middle shall be a red diamond

D.three shapes; the highest and lowest shall be black balls and the middle shall be a black diamond