How many emergency exits are there per floor?

请问每一楼面有多少紧急出口？

youdao

This 3-level low rise building comprises 6 units with 2 units per floor.

这是一幢楼高3层低密度住宅大厦，每层2个单位，共有6户。

youdao

Spacious entrances welcome both residents and guests, while elevators service two apartments per floor.

宽敞的入口迎接着每一位居民和客人，而电梯服务于每层的两户公寓。

youdao

and they have like, honestly 200 people per floor

那里每一层差不多有200人

住宿环境怎样？ - SpeakingMax英语口语达人

Yet inside Borders, I counted about five shoppers per floor, with another five at the coffee bar.

FORBES: Maybe Not So Crazy

Because space is at a premium, flats are the most common, with many buildings of 20 to 30 floors and four units per floor.

BBC: Living in: Hong Kong

Looking around the city's drinking mecca, Ginza, it's easy to see why: The blocks are filled with multistory buildings housing three or four bars per floor.

WSJ: Made Better in Japan