正常情况下气管插管的尖端距离气管隆突约()。
A.上2~3cm
B.下2~3cm
C.上3~4cm
D.下3~4cm
E.上0~1cm
参考答案:A
There are many students in his class,but he still feels _____. [ ]
A. alone
B. lonely
C. lone
D. asleep
上海最早的聚居地是()。
A.青浦区福泉山
B.青浦区崧泽古文化遗址
C.松江华亭
D.松江唐经幢