成人股骨颈的血液供应主要来源于
A.股骨头圆韧带内的小凹动脉
B.旋股内、外侧动脉分支
C.旋股内动脉
D.旋股外动脉
E.股骨干的滋养动脉
参考答案:B
There one country in the world.
A.will be only
B.be will only
C.will only be
D.only will be
正常血小板直方图的分布区域为 ()
A.2~15fl
B.2~30fl
C.10~15fl
D.10~45fl
E.15~30fl