Studies have shown some species routinely sleep very little,seemingly without negative costs to their performance while awake.African bush elephants sleep on average for two hours a day,and mostly while standing up,one study found.Sometimes they went 48 hours without sleeping. G...
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Studies have shown some species routinely sleep very little, seemingly without negative costs to their performance while awake. African bush elephants sleep on average for two hours a day, and mostly while standing up, one study found. Sometimes they went 48 hours without sleeping. ...
Sleeping a few hours at night ___ (对我们的健康有不 好的影响,) which can make us find it hard to pay attention to what we’re doing .相关知识点: 试题来源: 解析 has a bad effect upon our health 反馈 收藏
Lions generally sleep in the shade of a bush and many of them sleep for twentyhours a day. Elephants sleep for about two hours at a time,sometimes lying down but usu-ally standing up. Giraffes sleep for only ten minutes at a time, but they sleep many times aday. They sleep standing ...
搜索智能精选题目 Spending more hours sleeping at the weekend makes you sleepier during the week. A. fewB. a fewC. littleD. a little答案B
Whether it's a demanding job, school exams or a screaming baby, there are plenty of reasons why people may only sleep for four hours at night — but is four hours of sleep enough? TODAY.com spoke to doctors bout what happens when you sleep for four hours a night, the health effects ...
For example, try to go to sleep and wake up at the sametime every day, even on weekends and during holidays.( )1. How much sleep do adults need per night?A. 7-9 hours.B. 8-10 hours.C. More than 10 hours.D. Less than 7 hours.()2. What may happen if teens do not get ...