维持和改善脑卒中后偏瘫的痉挛肢体的活动范围，应采取的措施为() ["A．适当的体位","B．持续的牵张活动","C．运动点或周围神经的药物阻断","D．矫形器","E．手术"]
在常规MRI中，影响图像亮度和对比度的组织特征值有哪几种() ["A．有效质子密度","B．T1值","C．T2值","D．TR","E．TE"]
急性颅脑损伤入院后首先应进行() ["A．清创","B．复苏","C．检查呼吸道","D．头颅CT及MRI检查","E．防止误吸"]
对小儿喉、气管、支气管炎施行气管切开的适应证为() ["A．Ⅰ度呼吸困难","B．Ⅱ度呼吸困难","C．Ⅲ度呼吸困难","D．Ⅳ度呼吸困难","E．严重声嘶、发绀"]
急性喉梗阻的主要症状是() ["A．吸气性呼吸困难","B．声嘶","C．呼气性呼吸困难","D．发绀","E．阵发性犬吠咳嗽和呼吸困难"]
听神经瘤()内耳病变()中耳病变()中内耳病变()中枢病变()
