下列关于物业管理二级服务标准中共用设施设备维修养护的表述，正确的是（）

A.对共用设施设备进行日常管理和维修养护

B.建立共用设施设备档案（设备台账），设施设备的运行、检查、维修、保养等记录齐全

C.设施设备标志齐全、规范，责任人明确

D.载人电梯24小时正常运行

E.设备房保持整洁、通风，无跑、冒、滴、漏和鼠害现象

All of the following statements are true about the price-to-sales ratio EXCEPT:（）

A. users of the ratio believe that sales information is subject to less manipulation than any other data item.

B. price-to-sales ratio is fairly constant by industry.

C. advocates of the ratio believe that p sales growth is a requirement for a growth company.