血管闭塞后患者出现偏瘫、偏身感觉障碍及偏盲的动脉为()
A.大脑前动脉主干
B.大脑中动脉主干
C.大脑后动脉主干
D.内听动脉
E.椎-基底动脉
参考答案:B
As is known to us all,_______travels much faster than .
A.lights; sounds
B.light; sound
C.sound; light
D.sounds; lights
将高层建筑结构简化为竖向悬臂梁,则其顶点位移与其结构高度的()次方成正比。
A.2
B.3
C.4
D.5