If you want to know the meaning of the word______, you’d better look it up in the dictionary.

A．mostly

B．exactly

C．nearly

D．hardly

船舶锅炉整装回油式燃烧器，在预扫风结束时，燃油喷进炉膛，主要是因为此时控制系统发生（）动作。

A.风门关小

B.回油电磁阀关闭

C.油泵起动

D.加热器通电