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【简答题】
某高层商业综合楼地上共10层、地下共3层，建筑高度为53.80m，总建筑面积为67137.48m 2 。其中地下部分建筑面积为27922.30m 2 ，使用性质为停车库及设备用房，共计停车474辆；地上建筑面积为39215.18m 2 ，地上1～5层使用性质为零售商业，地上6～10层使用性质为餐饮与休闲娱乐场所。该建筑内设有室内、室外消火栓系统，自动喷水灭火系统，火灾自动报警系统，消防应急照明，消防疏散指示标志灭火器，消防电梯等消防设施；消防控制室设在地下1层，消防水泵房设置在地下2层。消防用电为一级负荷，电源从两个不同的区域变电站引入；消防供水从环状市政供水管网引入两条DN300的进水管，并在地块内形成环路。 根据以上场景，回答下列问题。 该建筑应设几台消防电梯？消防电梯的载重以及行驶速度应满足什么要求？
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