下列关于急性会厌炎的选项中,正确的是()
A.可有变态反应
B.严重时可出现窒息
C.有严重的声嘶症状
D.必要时要行气管切开
E.无应用抗生素的必要
参考答案:A, B, D
Getting rid of bad habit is________forming a good one.[ ]
A. an effort much as
B. much an effort as
C. as an effort much as
D. as much an effort as
By sunset we had ___ thirty miles.
A.taken
B.covered
C.reached
D.added