The visitors here are greatly impressed by the fact that ________ people from all walks of life are

working hard for ________ new Jiangsu. [ ]

A. /; a

B. /; the

C. the; a

D. the; the

带气接线的卡箍接头又称（）。

A、套管接头

B、短管接头

C、鞍式接头

D、钢三通接头