More than nine out of ten young people expose themselves to the blue light from smartphones before bed, causing problems with sleep.A new survey also shows more than 28 million people in the UK regularly get no more than seven hours sleep a night.Prof Richard Wiseman, who commissioned the You Gov poll described the findings as “extremely worrying”.Of the 2,149 adults questioned, 78% said they used electronic devices before going to bed.This rose to 91% among the 18- to 24-year-olds questioned in the survey.
Getting less than seven hours sleep a night is below the recommended guidelines, and is associated with a range of problems, including an increased risk of weight gain, heart attacks, diabetes and cancer.“The blue light from these devices suppresses (压制) the production of the sleep-inducing hormone melatonin, so it’s important to avoid them before bed time,”said Prof Richard Wiseman, from the University of Hertfordshire.
Everyone needs different amounts of sleep, but adults are generally thought to require a minimum of seven to eight hours a night.Teenagers are recommended to get more, about nine hours.The proportion (比例) of people thought to be getting too little sleep had risen by a fifth since a “bedroom poll” conducted last year by the National Sleep Foundation.
Last week revealed opticians were warning that overuse of smartphones may be increasing people’s risk of eye damage.Optician Andy Hepworth said:“Blue violet light is potentially harmful to the back of your eyes.”So over a long period of time it can damage your eyes.When you’re looking at a smartphone, the light peaking out of that is blue violet.The news came as a survey of 2,000 people suggests under-25s check their phones 32 times a day.
1.The purpose of the passage is to .
A.stress that people don’t use smartphones
B.remind people of enough sleep
C.ask people not to sleep too much
D.tell people not to use smartphones before bed
2.Which of the following statements is TRUE according to the passage?
A.According to a new survey, more than 28 million people in the UK get more than seven hours sleep a night.
B.More than 90% young people expose themselves to the blue light from smartphones before bed.
C.Of the 2,149 adults questioned, 91% said they used electronic devices before going to bed.
D.The news came as a survey of 2,000 people suggests under-25s check their phones 30 times a day.
3.According to what Andy Hepworth said, overuse of smartphones may be increasing people’s risk of .
A.weight gain B.cancer C.eye damage D.heart attacks
4.Teenagers are generally thought to get sleep of a night.
A.about 9 hours B.7—8 hours
C.less than 7 hours D.more than 10 hours
语篇解读:本文是一篇科普说明文。研究表明,睡前使用智能手机将导致睡眠等一系列问题。
答案及剖析:
1.D 写作意图题。根据第一段的第一句“More than nine out of ten young people expose themselves to the blue light from smartphones before bed, causing problems with sleep.”可知,超过90%的年轻人会在睡前玩智能手机,因此导致睡眠问题;据此可以判断本文旨在告诉人们不要在睡前玩智能手机,故 D 项正确。
2.B 细节理解题。根据第一段第一句“More than nine out...with sleep.”可知,超过90%的年轻人会在睡前玩智能手机,故 B 项正确;根据第一段第二句“A new survey also shows more than 28...a night.”可知,这些人每晚的睡眠时间不超过7个小时,故 A 项错误;根据第一段倒数第二句“Of the 2,149 adults...going to bed.”可知,这些人中的78%说他们在睡前使用电子设备,故 C项错误;根据文章最后一句“The news came as a...check their phones 32 times a day.”可知,这些人每天查看智能手机32次而不是30次,故 D 项错误。
3.C 细节理解题。 根据最后一段的第一、二句“Last week revealed opticians were warning that overuse of...to the back of your eyes.”可知,Andy Hepworth认为,过度使用智能手机会损伤眼睛,故 C 项正确。
4.A 细节理解题。根据第三段第二句“Teenagers are recommended to get more, about nine hours.”可知,青少年所需要的睡眠时间是每晚大概9个小时,故 A 项正确。
