We don't think she is _____ honest girl. [ ]
A. a
B. an
C. the
D. /
答案：B
入口活套、1#出口活套和2#出口活套的活套层数分别为（）层（）层、（）层。
A.2；2；4
B.2；4；4
C.4；4；2
D.4；2；4
凝汽器停运时应注意哪些事项？
