股骨颈骨折常见的晚期并发症是（）
A.髋关节强直
B.髋关节僵硬
C.股骨头坏死
D.骨化性肌炎
E.泌尿系感染
参考答案：C
- Jack, please don't look out of the window.
- ．
A．It's right.
B．I know that.
C．Sorry,1 won't do it again.
D．It doesn't rriatter.
在计算机内部，一切信息存取、处理和传送的形式是( )。
A．ASCⅡ码 B．BCD码C．二进制 D．十六进制
