以下哪一项不属于股骨头颈部的血运来源：
A．旋股内动脉
B．旋股外动脉
C．旋股中动脉
D．股骨干滋养动脉
E．圆韧带动脉
参考答案：C
John told me that he had lost his key to the car, but he didn't really lose it-that's just a(an)________．[ ]
A．fool
B．event
C．performance
D．trick
常见的电子传递链抑制剂有（）（）（）等。
