Passage One
We waste a third of our lives sleeping. When there doesn't seem to be enough hours in the day, you yearn to be like the former British Prime Minister Margaret Thatcher, who was said to get by on just four hours' sleep a night. There is a quite a range in the number of hours we like to sleep. 80% of us manage between six and nine hours a night; the other 20% sleep more or less than this.
There is plenty of evidence that a lack of sleep has an adverse effect. We do not simply adjust to it—in the short-term it reduces our concentration, and if it's extreme it makes us confused and distressed, and turns us into such poor drivers of being drunk. The long-term effects are even more worrying. Repeatedly getting less sleep than you need over the course of decades is associated with an increased risk of obesity, diabetes, high blood pressure and heart diseases.
But while it might not be possible to train yourself to sleep less, researchers working with the military have found that you can bank sleep beforehand if you plan well in advance. At the Walter Reed Army Institute of Research they had people go to bed a couple of hours earlier than usual every night for a week. When they were subsequently deprived of sleep they didn't suffer as much as the people who hadn't had the chance to bank sleep in advance.
16. How much time do most people usually sleep every night?
17. What could happen if people didn't get enough sleep for a long time?
18. What do the researchers find about the military?
短文一
我们生命中三分之一的时间浪费在睡眠上
很多证据显示缺少睡眠会带来副作用
虽然通过训练让自己少睡觉这招行不通,一些军队中的调查者发现你可以提前补觉
16.多数人每晚睡多长时间?
17.如果长时间缺觉人会怎么样?
18.在军队开展调查的研究者发现了什么?
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