睑内翻最严重的并发症是
A．畏光、流泪
B．持续性异物感
C．倒睫
D．角膜溃疡
参考答案：D
They gave him a chance to _____ designing the new building. [ ]
A. take pride in
B. take an interest in
C. take pleasure in
D. take part in
燃烧器发生不完全燃烧时（）。
A.容易使锅底形成炭黑
B.有时也会引发中毒
C.在回火现象中是经常发生的
D.容易造成脱火
