神经细胞动作电位和局部兴奋的共同点是
A.反应幅度都随刺激强度增大而增大B.反应幅度都随传播距离增大而减小C.都可以叠加或总和D.都有Na+通道的激活
参考答案:D
I want to relax myself fight now. Would you please change to _____music? [ ]
A. sad
B. loud
C. exciting
D. gentle
经济一体化