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外语
A、They are more health-conscious. B、They are changing their living habits. C、They get less and less sleep. D、They know the dange
A、They are more health-conscious. B、They are changing their living habits. C、They get less and less sleep. D、They know the dange
admin
2022-07-13
246
问题
The massive decline in sleep happened so slowly and quietly that few seemed to notice the trend. Was it because of the growing attraction of the Internet, video games and endless TV channels? Never disconnecting from work? No matter how it happened, millions of Americans are putting their health, quality of life and even length of life in danger.
New evidence shows why getting enough sleep is a top priority.
Some 40% of Americans get less than seven hours of shut-eye on weeknights.
"The link between sleep and health, and bad sleep and disease is becoming clearer and clearer," says Lawrence Epstein, a sleep expert at Harvard University.
For example, sleep duration has declined from some eight hours in the 1950s to seven in recent years.
At the same time, high blood pressure has become an increasing problem.
Blood pressure and heart rate are typically at their lowest levels during sleep. People who sleep less tend to have higher blood pressure, heart attack, diabetes, weight gain and other problems.
Sleeping better may help fight off illness. "When people are sleep-deprived, there are higher levels of stress hormones in their bodies, which can decrease immune function," says Doctor Felice of Northwestern University in Chicago. A university of Chicago study shows people who sleep well live longer. So say good night sooner and it may help you stay active and vital to a ripe old age.
16. What is the speaker mainly talking about?
17. What do we learn from the talk about today’s Americans?
18. What does the speaker say will happen to people who lack sleep?
选项
A、They are more health-conscious.
B、They are changing their living habits.
C、They get less and less sleep.
D、They know the dangers of lack of sleep.
答案
C
解析
细节推断题。短文首先阐明了人们睡眠减少的事实,随后以美国人的睡眠时间为例进行说明。20世纪50年代,人们的平均睡眠时间是8小时,近几年平均睡眠时间是7小时,40%的美国人睡眠时间甚至不足7小时。由此可知,当今美国人的睡眠时间越来越少。
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0
大学英语四级
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