问题
单项选择题
蒸发设备上升管是指锅炉的（）管。
A.过热器
B.水冷壁
C.省煤器
D.顶棚
答案
参考答案：B
搜题请搜索小程序“爱下问搜题”
蒸发设备上升管是指锅炉的（）管。
A.过热器
B.水冷壁
C.省煤器
D.顶棚
参考答案：B
What does the speaker mean a. It is not very possible that this news may change the mind of David. b. It is not very possible that this news may cause much attention of David. c. It is not very possible that this news may be welcomed by David. d. It is not very possible that this news may do any good to David.
