上游充通大￥ SHANGHAI JIAO TONG UNIVERSIT ACIE Group 7 每天午间小睡，52.27% 天多次小睡，6.82% 不小睡，22.73% 累了就睡，18.18% Fig.6 The nap habits (4)As for the sleep style shown in Fig.7,the proportion of owl style is relatively larger than lark style. 百灵鸟（早晨大脑清醒，朝气 最佳状态)，45.45% 其他，18.18% Fig.7 Types of sleep style 4.1.2.Sleep habits As for the sleep habits shown in Fig.8,cell phone playing is much more than other activities,about 80%of students will have this habit. 100% 81,82% 80% 60% 45.45% 40% 36.36% 20% 15.919% 0% 吃夜宵 玩手机，等电子产品 同读 听音乐 Fig.8 Sleep habits -11-ACIE Group 7 - 11 - Fig.6 The nap habits (4)As for the sleep style shown in Fig.7,the proportion of owl style is relatively larger than lark style. Fig.7 Types of sleep style 4.1.2. Sleep habits As for the sleep habits shown in Fig.8,cell phone playing is much more than other activities,about 80% of students will have this habit. Fig.8 Sleep habits