[名词解释] 扭伤

肌力 下述胃溃疡征象，哪项提示为恶性() ["A．粘膜纠集","B．狭颈征","C．项圈征","D．腔外龛影","E．局部胃壁僵硬"] 类风湿关节炎 下列“结肠癌”的造影表现，哪项也可见于良性病变() ["A．环堤","B．半月征","C．结肠壁局限性僵硬","D．苹果核征","E．充盈缺损"] 等速运动 扭伤