I was told that _______ 10:20 flight would take us to Shanghai in time to reach _______ Fudan University. 

A．the; /

B．the; a

C．a; the

D．/; the

原料气不经过脱硫处理直接入工艺系统易导致（）。

A、水碳比过小

B、转化触媒硫中毒

C、触媒粉碎

D、转化反应不彻底