易燃烧的药物()
A.过氧乙酸、碘酊、糖衣片、酵母片
B.疫苗、胎盘球蛋白
C.乙醚、乙醇
D.青霉素
E.地塞米松
参考答案:C
喉阻塞紧急情况下行哪种穿刺
A.气管软骨
B.会厌软骨
C.甲状软骨
D.环状软骨
E.环甲膜
Helen ________ go on the trip with us, but she isn’t quite sure yet.[ ]
A. shall
B. must
C. may
D. can