Three common misunderstandings about fire protection zoning in civil buildings, and many people remember them wrongly!

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Table 5.3.1 of the "Construction Regulations", the allowable building height or number of floors of buildings with different fire resistance levels, and the maximum allowable building area of ​​​​fire protection zones. For many candidates, the maximum allowable building area of ​​​​fire protection zones for civil buildings only needs to remember the above table. In fact, just memorizing this table is not enough to cope with the exam. You must also pay attention to the following three misunderstandings.: 　　Misunderstanding 1: When an automatic fire extinguishing system is installed, what is the maximum allowable building area of ​​the fire protection zone of the equipment room? 　　When an automatic fire extinguishing system is installed in the building, the maximum allowable building area of ​​the fire protection zone of the equipment room can be 2,000 square meters. 　　▲[2015 Comprehensive Examination Question 11] The first to third floors of a building are shopping malls, the fourth to seventeenth floors are offices, the first basement is a shopping mall, the second underground floor is a shopping mall, and the rest is an equipment area. Interior decoration and fire protection facilities and equipment all comply with relevant regulations. Regarding the building area of ​​the fire protection zone of the underground shopping mall and equipment area of ​​the building below, which one is correct ( ). 　　A. Shopping mall business hall 3000㎡ ； Equipment area 2000㎡ B. Shopping mall business hall 4000㎡ ； Equipment area 1000㎡ C. Shopping mall business hall 4000㎡ ； Equipment area 2000㎡ D. Shopping mall business hall 2000㎡ ； Equipment area 2000㎡ [Reference * * 】D