The bus broke down and all the passengers had to()
A.get in
B.get on
C.get off
参考答案:C
嵌顿性腹股沟疝试行手法复位的指征是()。
A.时间在3~4小时内
B.局部压痛不明显
C.无腹膜刺激征
D.年老体弱
E.小幼儿
把一块饼平均切成4小块,每小块是它的______.