股骨干骨折后合并膝关节僵硬常见原因是
A．粉碎性骨折B．合并神经损伤C．持续牵引所致D．夹板过硬所致E．固定缺少功能锻炼
参考答案：E
.___ in her most beautiful skirt, the girl tried to make herself ___ at the party.
A．Dressed; noticed
B．Dressing, noticed
C．Dressed, noticing
D．Dressed;being noticing
不属于差错学派细胞衰老机制的是（）。
A.自由基学说
B.重复基因失活
C.线粒体DNA突变
D.大分子交联
E.复制性衰老
