简答题Early severe complication of knee dislocation is ( ) A、Collateral ligament injury B、Cruciate ligament injury C、Meniscus injury D、Popliteal fossa vascular and nerve injury简答题The clinically common type of hip dislocation is ( ). A、Anterior dislocation B、Posterior dislocation C、Central dislocation D、Upper dislocation简答题Fractures with combined vascular injury and nerve injury are ( ). A、Severely displaced fracture of the distal 1/3 of femur B、Fracture of tibial malleolus C、Flexion-type supracondylar fracture of femur D、Fracture of middle and lower tibia简答题Fractures common in the elderly are ( ). A、Femoral neck fracture B、Femoral shaft fracture C、Supracondylar fracture of femur D、Intertrochanteric fracture简答题The predilection age of traumatic hip dislocation is ( ) A、Infant B、Adolescent C、Youth D、Middle aged简答题Which of the following is not the cause of knee dislocation ( ) A、Unstable structure B、Strong joint capsule C、Strong intra-articular ligament D、Strong extra-articular ligament