男性,22岁,北方人士。反复鼻血并渐进性鼻塞2年。
该病多数起源于()
A.鼻甲
B.鼻中隔黏膜
C.副鼻窦
D.蝶骨体、枕骨基部
E.鼻软骨
参考答案:D
应与小儿腹股沟斜疝鉴别的疾病包括()。
A.睾丸鞘膜积液
B.交通性鞘膜积液
C.睾丸下降不全
D.睾丸肿物
E.上述全部疾病
A safety outlet is provided on the CO2 discharge piping to prevent().
A.over pressurization of the space being flooded
B.rupture of cylinder due to temperature increase
C.over pressurization of the CO2 discharge piping
D.flooding of a space where personnel are present