问题
单项选择题
在锅炉水循环设备中()直接吸收炉膛烟气放出的辐射热量,将炉水加热、蒸发为饱和蒸汽并保护炉墙。
A、下降管
B、汽包
C、联箱
D、水冷壁
答案
参考答案:D
在锅炉水循环设备中()直接吸收炉膛烟气放出的辐射热量,将炉水加热、蒸发为饱和蒸汽并保护炉墙。
A、下降管
B、汽包
C、联箱
D、水冷壁
参考答案:D
B:Hello,David,I have been to Sanya and stayed there for a month.____2____ A:No,I have never been to Sanya.But I have always wanted to go there.____3___ It’s said that it’s very beautiful. B:Of course,it’s wonderful.I took some photos by the sea.Sanya is really a beautiful city. A:Really?___4____ B:What’s that? A:Yantai is chosen(被选为)to be one of the most beautiful cities in China. B:Oh.I think next time I’ll go there to spend my holiday. A:Good idea! ____5___ B:Certainly I won’t. |