肠系膜上动脉一般与腹主动脉前壁间呈一角度,正常不应超过()
A.90°
B.80°
C.60°
D.50°
E.30°
参考答案:E
解析:肠系膜上动脉与腹主动脉前壁成锐角,约30°。
多根多处肋骨骨折会出现张力性气胸表现为心脏压塞的特征是进行性血胸表现为
A.反常呼吸运动
B.胸膜腔压力持续升高
C.呼吸时纵隔左右扑动
D.静脉压升高,心搏微弱,动脉压降低
E.胸膜腔引流血量>200ml/h,连续3h
A desire for environmental change led to the creation of various political parties around the world whose emphasis was largely on environmental protection.