腰椎椎管狭窄症的主要临床特征是()
A.反复腰痛
B.反复腿痛
C.双下肢交替痛
D.直腿抬高试验阳性
E.间歇性跛行
参考答案:E
He told me that she had met one of my old friends in the street ________.
A.the next day
B.the following day
C.the day before
D.yesterday
可改善COPD患者症状的是()
A.吸入支气管扩张药物
B.戒烟
C.长期家庭氧疗
D.流感疫苗注射
E.康复锻炼