换药的禁忌证是()
A.更换或去除引流物
B.创口渗血或渗出物多,疑有血肿或感染
C.敷料松脱或过紧,伤口剧痛
D.需观察创口或皮瓣血供
E.无菌伤口
参考答案:E
——Mr. Harry, we want to hear what you think about the reform being carried out in our school.
——OK, I to that.
A.am coming
B.have come
C.came
D.come
若x=﹣1是方程2x﹣3a=7的解,则a=( ).