烧伤严重程度分为_____、_____、_____、_____四类。
一期梅毒硬化性淋巴结炎的特点是() ["A．红肿","B．易破溃","C．质地较硬","D．自觉疼痛"]
输出功率与输入功率的比称为() ["A．功率","B．强度","C．电压","D．增益","E．频率"]
骨牵引适宜于_____长骨骨折脱位。
恶性病变的声像图特点中，应除外() ["A．形态较规则","B．边缘不光滑或断续","C．内部回声低弱或增强","D．后方回声衰减明显","E．周围组织呈浸润性改变"]
颈椎损伤的特点是；_____、_____、_____。
