关于慢突触电位的产生机制,所涉及的主要离子是()
A.Na+
B.K+
C.Ca2+
D.Cl+
E.H+
参考答案:B
To whom should the master render the Maritime Declaration of Health when the ship arrives at a port outside the territory?().
A.Health doctor
B.Health officer
C.Health surgeon
D.Health person
对施工承包单位资质的动态管理是通过( )或监督检查的办法来进行。
A.每月检查 B.季度检查 C.年度检查 D.每两年检查一次