消化道穿孔的临床特点有()
A.突然剧烈腹痛,呕吐
B.必有胃十二指肠溃疡病史
C.板样腹,压痛、反跳痛、肌紧张
D.肠鸣音减弱或消失
E.便潜血试验阳性
参考答案:A, C, D, E
类嗅囊有何生理功能?
The good service at the hotel()the poor food to some extent
A.made up for
B.made up
C.made for
D.made out