下列天气符号表示的天气,对交通最不利的是
A.A
B.B
C.C
D.D
答案:C
—What does the sign"" mean?
—It means "______". [ ]
A. Turn left
B. No crossing
C. Cross road
D. Don't turn left
4个月小儿,反复发作性吸气困难,伴吸气时喉鸣5~6次,间歇期正常,无发热及声音嘶哑,体温及心肺腹均正常,最可能的诊断
A.气管异物B.喉痉挛C.喘息性支气管炎D.急性喉炎E.窒息