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【多选题】
下面关于玻璃破碎探测器的主要特点及安装使用要点的叙述正确的有( )A.
玻璃破碎探测器适用于一切需要警戒玻璃防碎的场所
B.
可以用一个玻璃破碎探测器来保护多面玻璃窗
C.
窗帘、百页窗或其他遮盖物会部分吸收玻璃破碎时发出的能量
D.
探测器不要装在通风口的前面,也不要靠近门铃,以确保工作可靠性
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举一反三
【简答题】What colors does Don want for the display unit?
【简答题】What technology is used in this Christmas display? And what advantages does this technology enjoy?
【单选题】What does the command show | compare rollback 1 display?（）
A.
the difference between the current candidate configuration and the candidate configuration from one commit ago
B.
the difference etween the current active configuration and the active configuration from the one commit ago
C.
the difference between the current active configuration and the active configuration from one commit ago
D.
the difference between the current candidate configuration and the archived configuration from one commit ago
【单选题】What does the command show compare rollback 1 display?（）
A.
the difference between the current candidate configuration and the candidate configuration from one commit ago
B.
the difference between the current active configuration and the current candidate configuration
C.
the difference between the current active configuration and the active configuration from one commit ago
D.
the difference between the current candidate configuration and the archived configuration from one commit ago
【简答题】是英雄造时势,还是时势造英雄?
【单选题】When you display the routing table by entering the show route command, what does the* indicate?（）
A.
The route is a direct route.
B.
The route was selected as active.
C.
The route is a default route.
D.
The route was learned using a dynamic routing protocol.
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