对加热炉的维护要点是,搞好烟道挡板和火嘴风门的润滑;维持长明灯火焰正常;经常切换清理阻火器;控制合理的排烟温度,防止对流段发生露点腐蚀。
参考答案:对
女性,66岁。高血压病史18年,劳累后突发呼吸困难,咳粉红泡沫样痰。查体:双肺底水泡音。该患者的诊断可能是()
A.肺结核
B.心力衰竭
C.支气管扩张
D.肺癌
E.肺炎
Owing to its wide ______ of foods that suit all tastes and pockets, this restaurant has become popular
with customers.[ ]
A. affection
B. breakthrough
C. range
D. origin