O型腿见于（）
A.股骨头无菌性坏死
B.膝关节结核
C.髋关节脱位
D.小儿麻痹症后遗症
E.佝偻病
参考答案：E
It is said that Nigeria is Great Britain.
A．three time the size of
B．the size three times of
C．three times as the size of
D．three times the size of
轨道车常用制动的最小减压量应不低于（）。
