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单选题
3、Access doors and panels in a zone are identified by the zone number and a two or three letter suffix.
3、Access doors and panels in a zone are identified by the zone number and a two or three letter suffix.
区域内的门禁门和面板由区域号和两个或三个字母的后缀来标识
A
Access doors and panels within the area are recognized by the number of the area and two or three lettersuffix.
B
The area number and a postfix with two or three letters identifies the access doors and panels in an area.
C
The identification of the access panels and doors is accomplished by the zone number suffix.
答案解析
正确答案：B
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