热态启动时，为尽快提高汽温，需投入旁路系统运行。
参考答案：对
--Could you tell me ?
--Glad to help.[ ]
A. if I have been to the Great Wall
B. where did he study
C. how I can get to the post office
D. what's your name
给排水管道工程施工及验收规范规定，管径大于（）mm时，应采用双面焊。
A、DN600
B、DN700
C、DN800
