判断组织兴奋性高低常用的指标是
A.阈电位 B.时值 C.阈强度D.刺激强度相对时间的变化率 E.刺激的频率
参考答案:C
女性患者,70岁。以前没有高血压和糖尿病史。活动中出现头痛伴随左侧肢体无力2小时。即往有两次脑中风史,此次脑CT检查显示右侧顶叶近大脑皮层处一个高密度影。
首先考虑的诊断是()
A.高血压动脉硬化性脑出血
B.脑膜瘤
C.类淀粉变性脑出血
D.脑梗死
E.脑栓塞
Enough sleep is important to health. The amount of sleep needed __31________ on the age of the person and the conditions in ___32_______ sleep takes place. The young may need more sleep than ___33_______ old, but usually eight hours are enough for the health of grown-ups. Some can do with __34________ than this amount, but others may need more. Every person knows his own need. ___35_______ is then a matter of good judgment to satisfy his need. Sleep __36________ always be enough to make one bring back his __37________ (strong) and get ready for a day’s work.
Fresh air is necessary to sound sleep. So it is not __38_________ reason for some people to think that it is practicable to sleep in the open air. A bath at bedtime, __39________ hot nor cool but of body temperature, may be helpful to sleep. Sleep-producing drug(帮助睡眠的药物) should never be taken except when ___40_________ (suggest) by a doctor.