--I think Nelson Mandela is a great man. Do you think so?

--______ I feel that he is a true hero, too.

A．I’m with you.

B．I don’t think so.

C．Pardon?

D．Really?

当锅炉处于低水位联锁保护水位时，除燃烧系统处于联锁状态以外，（）也应处于联锁状态。

A.鼓风机

B.水泵

C.炉排

D.引风机