若受热面管中流动的是水或汽水混合物，而烟气在管外的管间流动，_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题

若受热面管中流动的是水或汽水混合物，而烟气在管外的管间流动，这种锅炉称为（）

A.水管锅炉

B.汽管锅炉

C.烟管锅炉

D.废气锅炉

答案

参考答案：A

单项选择题 A1/A2型题

有关肺癌的临床表现，下列错误的是（）

A.无特异性的症状，很容易忽略

B.侵犯喉上神经出现进食呛咳

C.一般为呼吸系统疾病共有症状，如咳嗽、痰血、低热、胸痛、气闷等

D.侵犯纵隔压迫上腔静脉，出现静脉怒张，面、颈部水肿

E.侵犯形成心包积液或胸腔积液，可导致气促

完形填空

从A—J选项中选出能填入空白处的最佳选项补全对话。（选项中有两项是多余的）
W: Excuse me, sir.
M: Yes,    小题1:
W: I have been here for an hour to meet my father.    小题2:___
M: Are you sure of the time his flight arrives?
W:    小题3:He told me he would reach the airport at about 1:00 this afternoon
M: That’s true.    小题4:
W: What? BA506? Well, I don’t think it’s his flight number.
M:    小题5:
W: Yes, it’s VA407. I think...Oh, just a minute, please. Here.    小题6:Sorry, it’s VA408.
M: VA408? I see, madam,    小题7:but it will be two hours and twenty minutes late because of the bad weather in New York.
W: OK.    小题8:Thank you very much ,sir.
M: Good luck! Madam.

A. can I help you?
B. But I saw all the passengers come out except him.
C. I wrote it on my notebook.
D. Do you remember his flight number?
E. Flight BA506 has just arrived.
F. What’s his flight number?
G. the flight was to arrive at 1:00,
H. Then I will have to wait longer.
I. what can I do for you, madam?
J. Yes, I think so.