乳牙长齐的年龄是_________。
正常人直立时，哪些椎体的棘突为水平位() ["A．颈椎，全部胸椎和上4个腰椎","B．颈椎，上4个胸椎和下4个腰椎","C．前2个颈椎.全部胸椎和下4个腰椎","D．颈椎和腰椎","E．颈椎，上3个胸椎和全部腰椎"]
连续骶管阻滞后，容易发生哪种并发症() ["A．头痛","B．感染","C．硬膜外脓肿","D．蛛网膜炎","E．马尾神经综合征"]
布比卡因脊麻的起效时间同() ["A．利多卡因","B．丁卡因","C．普鲁卡因","D．罗哌卡因","E．地布卡因"]
某男童，9岁，自觉发热轻微，遇风则冷，自汗，脉浮缓，此为() ["风寒表证","风热表证","伤风表证","伤湿表证","伤暑证"]
小儿进入青春期后，由于_________和________的协同作用，体重增长很快。
