机体在发生应激反应时，血中浓度明显升高并起关键作用的激素是（　　）。

People would tend to believe in what their friends or r...

单项选择题People would tend to believe in what their friends or relatives say in terms of what to buy.
A、True
B、False

若干EPSP总和后足以达到阈电位水平，神经元上首先爆发动作电位的部位是（　　）。A.轴突末梢B.轴突始段C.胞...

单项选择题若干EPSP总和后足以达到阈电位水平，神经元上首先爆发动作电位的部位是（　　）。

The comma is still needed when if clause follows the ma...

判断题The comma is still needed when if clause follows the main clause.
A、正确
B、错误