每学期开学时,学生应当持学生证按照规定时间到()、()、()所在方可入班上学。
参考答案:系办报到;注册手续;学生注册后
用扩展访问控制列表配置封禁ICMP协议,只允许168.27.95.0/24子网的ICMP数据包通过路由器,正确的配置是______。
A.access-list 90 deny icmp 168.27.95.0 255.255.255.0 any access-list 90 deny icmp any any access-list 90 permit ip any anyB.access-list 100 permit icmp 168.27.95.0 0.0.0.255 any access-list 100 permit ip any anyC.access-list 110 permit icmp 168.27.95.0 255.255.255.0 any access-list 110 deny icmp any anyD.access-list 120 permit icmp 168.27.95.0 0.0.0.255 any access-list 120 deny icmp any any access-list 120 permit ip any any
下列哪些物质跨膜运输方式属于主动运输:()。
A.钠钾跨膜运输
B.胞吞作用
C.协同运输
D.乙醇跨膜运输