什么样的幼树需要平茬？怎样平茬？

A. 冻干箱
B. 冷凝器
C. 冷冻机
D. 蒸气发生器
E. 真空泵

A. 不因乘客催促而反感，保持良好心态，安全行车
B. 加大油门，频繁变线，争取时间
C. 选择最快捷的线路行驶
D. 积极配合，设法提供帮助

A. EIGRP can be used only as the PE-CE routing protocol if the PE and CE routers are in the same AS
B. Other EIGRP AS routes are automatically advertised to the CE router and do not require a redistribution configuration command to be configured
C. Unlike other routing protocols that are used between PE and CE routers, EIGRP supports backdoor links
D. Configure of the VPN is only required on the PE router