|
|||||
|
|
| Haw Much Sleep do Urlan People Get? | |
| 摘 要： | A study group from People's University of Chinaconducted a sample survey to find out how people livingin cities spend their time. They visited 4,876 people agedfrom 15 to 75 in 40 cities at their homes and asked themto fill in questionnaires. The following is what they foundout about how much sleep urban people get. |
| 本文献已被 CNKI 等数据库收录！ | |