以下属于低危手术的有（）
A.体表手术
B.内镜手术
C.眼科手术
D.颈部手术
E.门诊手术
参考答案：A, B, C, E
The style of writing in this article is so beautiful, which made the reader please both to the eye and in the mind.
A．pleases the reader
B．please made the reader
C．pleased the reader
D．made the reader pleasant
简述污水汽提塔底液面的正常调节方法。
