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【单选题】
若对某角观测一个测回的中误差为 ±6′′,要使该角的观测精度达到±2.5′′,需要观测( )个测回。A.
3
B.
4
C.
5
D.
6
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举一反三
【多选题】A firewall filter is applied as an input filter on a transit interface. What three types of traffic will this affect? （）
A.
inbound traffic transiting the router
B.
outbound traffic transiting the router
C.
traffic destined to the Routing Engine
D.
traffic destined to the interface address on which the filter is applied
【简答题】What three types of coal gasifiers are introduced in the textbook? Which type of gasifier has the widest and most uniform high temperature distribution? (10 points)
【简答题】What are three types of forging?
【多选题】What are three types of routing instances?（）
A.
VPN
B.
virtual-router
C.
policy
D.
VRF
E.
forwarding
【简答题】电机按照能量转换分为（ ）和（ ）两大类。按供电电源不同分为（ ）和（ ）两大类。A. 电动机、发电机、交流电机、直流电机
【简答题】教材里介绍了哪三种煤气化炉? 哪种反应炉具有最宽和最均匀的高温区? ( 10 分) What three types of coal gasifiers are introduced in the textbook? Which type of gasifier has the widest and most uniform high temperature distribution? (10 p...
【简答题】What three types of communication might different audiences value?
【简答题】According to Alex MacBeath, what three types of pressure are there?_______________________________________
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