Your vessel has a midship engine room and the cargo is concentrated in the end holds.The vessel is（）.

A.sagging with tensile stress on main deck

B.sagging with compressive stress on main deck

C.hogging with tensile stress on main deck

D.hogging with compressive stress on main deck

建筑采暖管道安装工序后的正确顺序是（）。

A.系统清洗→管道系统试验→防腐绝热→竣工验收

B.管道系统试验→防腐绝热→系统清洗→竣工验收

C.管道系统试验→附件检验→防腐绝热→竣工验收

D.防腐绝热→管道系统试验→系统清洗→竣工验收