产妇双腿极度屈曲贴近腹部，双手抱膝

A．不完全流产
B．稽留流产
C．难免流产
D．先兆流产
E．完全流产

定义一个用于封禁ICMP协议而只允许转发166.129.130.0/24子网的ICMP数据包的访问控制列表，Cisco路由器的正确配置是

A．access-list 198 permit icmp 166.129.130.0 255.255.255.0 any　　access-list 198 deny icmp any any　　access-list 198 permit ip any any

B．access-list 198 permit icmp 166.129.130.0 0.0.0.255 any　　access-list 198 deny icmp any any　　access-list 198 permit ip any any

C．access-list 99 permit icmp 166.129.130:0 0.0.0.255 any　　access-list 99 deny icnip any any　　access-list 99 permit ip any any

D．access-list 100 permit icmp 166.129.130.0 0.0.0.255 any　　access-list 100 permit ip any any　　access-list 100 deny icmp any any