衡量组织兴奋高度的指标是
A．阈电位
B．阈值
C．刺激强度变化率
D．反应的快慢
E．动作电位的幅值
参考答案：B
Tom was _____ the queue when I saw him. [ ]
A. at the head of
B. at head of
C. on the head of
D. around
患者，女，50岁。胸闷憋气，痰多黄黏，大便干结，舌体胖大。首选药物是（）
A.枳实
B.瓜蒌
C.桂枝
D.郁金
E.川芎
