We were sad to hear the news that       eight Chinese peace-keeping policemen were killed in       Haiti earthquake.

A．the ;/

B．/;the

C．the ; a

D．an; the

简支梁的温度跨度是按一孔梁的固定支座到相邻固定支座或（）挡砟墙间的距离计算。

A、桥头

B、梁端

C、墩台

D、桥台