SIGTRAN协议栈包含以下部分:()
A.七号信令适配子层
B.信令传输层SCTP
C.IP承载层
D.应用层
参考答案:A, B, C
神经元兴奋时,首先产生动作电位的部位是()
A.胞体
B.树突
C.轴突
D.轴突始段
E.树突始段
I ‘ ll help you_________.
A.as much as I can
B.as possible as I can
C.as many as possible
D.as many as I can