动作电位到达突触前膜引起递质释放与哪种离子的跨膜移动有关
A.Ca2+内流
B.Ca2+外流
C.Na+内流
D.Na+外流
E.K+外流
参考答案:A
If you're buying today 's paper from the stand, could you get for me?
A.one
B.such
C.this
D.that
A点高程40.150m,B点高程41.220m;施工单位从引入场内M点高程:从A点引测,前视读数1.10m,后视读数1.40m;现从B点校核M点高程,后视读数1.10m,前视读数应为( )m。
A.1.25
B.1.37
C.1.49
D.1.87