David scored a wonderful goal _____the football match and the team won the match ______.

A．in the end of; in the end

B．in the end; at the end of

C．at the end of; in the end

D．at the end of; at the end of

高层建筑管道施工中，铜管连接当管径大于或等于2mm时宜采用（）

A.对口焊接

B.专用接头

C.热熔连接

D.套管焊接