(67)is an error detection code that most data conlmunication networks use.
(68)is an interior gateway protocol that uses a distance vector algorithm to propagaterouting information.
(69)is a transfer mode in which all types of information are organized into fixed form. cells on all asynchronous or nonperiodic basis over a range of media.
(70)is an identifier of a web page.
A.ICMP
B.SMTP
C.IGMP
D.ARP
第3题
A.必须在下一层模板全部紧固后,方可进行上一层安装
B.当下层不能独立安设支撑件时,应采取永久固定措施
C.模板未安装对拉螺栓前,板面应向前倾一定角度
D.安装过程应随时拆换支撑或增加支撑
E.对拉螺栓与墙模板应垂直
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