大青叶除清热解毒外，又能（） ["凉血消斑","祛痰止咳","清肝泻火","利湿通淋","燥湿消肿"]
多发性硬化的病程特点为（） ["无复发","缓慢进展","进行性恶化","多有复发与缓解","以上均不正确"]
脑卒中偏瘫运动训练的目的是（） ["增加运动技巧","降低肌痉挛","增加关节活动度","增强肌肉力量","增加肌肉耐力"]
养阴润肺，清心除烦的药物是（） ["女贞子","墨旱莲","麦冬","百合","枸杞子"]
男，65岁，头晕、步行不稳、饮水呛咳1周。既往有高血压病史。头颅MRI示延髓背外侧梗死。闭塞的血管是（） ["大脑中动脉","大脑前动脉","小脑后下动脉","小脑上动脉","大脑后动脉"]
简述低血容量性休克的发病原因。
