关于小儿喉部解剖特点,下述哪个不对()。
A.小儿舌较大,颈较短
B.小儿会厌呈U型,不易活动
C.小儿喉呈漏斗型
D.小儿喉更接近头端
E.小儿喉头粘膜较成人不易水肿
参考答案:E
_____ we were eating dinner in the restaurant, the owner's dog took my bag away quietly. [ ]
A. Because
B. While
C. As soon as
D. Until
用18.4mol•L-1H2SO4配制成500mL 1mol•L-1 H2SO4溶液时,不需要用到的仪器是( )
A.玻璃棒
B.胶头滴管
C.托盘天平
D.500mL容量瓶