Children can spend hours a day looking at computer screens and other digital devices(數(shù)碼設(shè)備). Some eye doctors say this leads to an increase in “computer vision syndrome(電腦視力綜合癥).”
Nathan Bonilla-Warford is an optometrist(驗(yàn)光師)in Tampa, Florida. He has seen an increase in problems in children. “A lot more children come into the office either because their parents have noticed that they have headaches or red or watery eyes or discomfort, or because their nearsightedness appears to be increasing and they’re worried,” he says.
Dr. Bonilla-Warford says part of the problem is that children may be more likely to pay no attention to early warning signs than adults. “Even if their eyes start to feel uncomfortable or they start to get a headache, they’re less likely to tell their parents, because they don’t want to have the game or the computer or whatever taken away,” he explains.
He says another part of the problem is that people blink(眨眼)less often when they use digital devices. He says, “A person who uses an electronic device blinks about one third as much as we normally do in everyday life. And so that can result in the front part of the eye drying and not staying protected like normal.”
Eye doctors offer suggestions like following which is known as the 20/20/20 rule. That means every twenty minutes look away twenty feet or more for at least twenty seconds from whatever device you’re using.
Other suggestions include putting more distance between you and the device and using good lighting. Of course, another way is to spend less time looking at screens. Many experts say children should spend no more than two hours a day using digital devices—with no screen time for children under two.
But not all eye doctors have noticed an increase in problems in children. Dr. David Hunter, from Children’s Hospital Boston, has not seen an increase in his practice. “While it is possible to develop fatigue looking at screens for a long period of time, there’s certainly no proof that it actually causes any damage(傷害)to the eyes.” he says.
小題1:Which of the following is true according to the passage?
A.Dr. Bonilla-Warford thinks using computers causes nearsightedness.
B.People keep their eyes protected against drying by blinking normally.
C.Children under two can watch TV for less than two hours a day.
D.Dr. David Hunter says headache causes an increase in eye problems.
小題2:What does the underlined word “fatigue” mean?
A.Interest.B.Ability.C.Tiredness.D.Difficulty.
小題3:What can be the best title for the passage?
A.Looking at Screen: Two Hours or More
B.How Can Children Use Their Eyes Properly
C.Using Digital Devices: Advantages and Disadvantages
D.How Much Screen Time Is Too Much for Children

小題1:B
小題2:C
小題3:D
孩子們每天花上幾個(gè)小時(shí)看著電腦屏幕和其他數(shù)碼設(shè)備(數(shù)碼設(shè)備)。一些眼科醫(yī)生說這樣會(huì)增加“電腦視覺綜合癥(電腦視力綜合癥)!
小題1:根據(jù)文章可知A,C,D表述不準(zhǔn)確,故選B。
小題2:細(xì)節(jié)理解題。選C。
小題3:主旨大意題。
練習(xí)冊系列答案
相關(guān)習(xí)題

科目:初中英語 來源:不詳 題型:完形填空

    Not all people like to work but everyone likes to play .All over the world men and women,boys and girls enjoy  l .Since the days of long ago,adults(成年人)and children have called their friends together to spend 2  even days playing games.
Sports help people to live .They help to keep people healthy and feeling good.When they are playing games,people a lot  4.This is good for their health.Having  5  with their friends makes them happy.
Many people enjoy sports by watching others    .In small towns,crowds(人群)meet to watch the bicycle races or the soccer games.In big cities,thousands of people 7   to see an ice-skating show or a baseball game.
What are your favorite sports? Is the weatherwhere you live? Then swimming is probably one of your sports.Boys and girls in China love to  9 .There are wonderful beaches and there are beautiful 70 and lakes across the country.The weather is also good for swimming.
小題1:
A.musicB.moviesC.sportsD.trips
小題2:
A.hoursB.weeksC.monthsD.years
小題3:
A.a(chǎn)loneB.busilyC.carefullyD.happily
小題4:
A.speakB.thinkC.moveD.eat
小題5:
A.funB.jokesC.dinnerD.1essons
小題6:
A.walkB.playC.jumpD.run
小題7:
A.buy ticketsB.take turnsC.read newspapersD.hold meetings
小題8:
A.coolB.coldC.hotD.warm
小題9:
A.skateB.swimC.surf D.dance
小題10:
A.mountainsB.citiesC.riversD.seas

查看答案和解析>>

科目:初中英語 來源:不詳 題型:單選題


There are all kinds of machines. They  21  in many different ways. One kind of machine is called a computer. A computer can do many things. A computer can do math problems. People can also do math problems. But they cannot do it   22  a computer.
Computers remember things. Computers do   23  people tell them. People cannot remember as many things as computers. Computers help tell   24  the weather will   25  .Computers help fly rockets and spaceships.
These are   26  of ways computers are used. They are used in 27  ways. Some computers do just 28  things. Some computers can do a lot of things. There are  29  computers. There are big computers. There may be computers in your school. Do you   30  what they do?
小題1:.
A.useB.a(chǎn)re usedC.a(chǎn)re usingD.will use
小題2:.
A.faster thanB.a(chǎn)s fast asC.more quickly thanD.so big as
小題3:.
A.somethingB.thatC.everythingD.things
小題4:.
A.WhichB.whereC.whatD.why
小題5:. A. be like       B. be               C. look             D feel
小題6:.
A.a(chǎn)llB.manyC.a(chǎn) lotD.only some
小題7:.
A.thousandB.thousandsC.thousand ofD.thousands of
小題8:.
A.a(chǎn) littleB.littleC.fewD.a(chǎn) few
小題9:.
A.largeB.hugeC.goodD.small
小題10:.
A.getB.talkC.makeD.know

查看答案和解析>>

科目:初中英語 來源:不詳 題型:完形填空

Homesick is a compound(復(fù)合的) word made up of HOME and SICK. You know what each   46   means on its own, of course. But do you know the meaning    47   they are used together? The definition(定義) of homesick is SICK FOR HOME. It means you miss your home.
Now think for a minute   48 SEASICK. If you change the word HOME in the definition to the word SEA, would the definition   49 SEASICK? Does seasick mean SICK FOR SEA? It means something quite   50 . Seasick means SICK BY THE MOVEMENT ON THE SEA. When you are    51   ,the only place you want to be is at home. When you are seasick,    52   you want to be is at sea.
Have you ever   53   a person being heartsick? Heartsick doesn’t mean that something is wrong with a person’s heart. People are heartsick when they are    54  deep inside as if their hearts are broken.
And we also have other compound words, such as handshake and    55  . Perhaps you may write definitions for them. It must be helpful to know some thing like this in your English study.
小題1:
A.wordB.phraseC.sentenceD.passage
小題2:
A.howB.whyC.whenD.where
小題3:
A.forB.fromC.a(chǎn)boutD.like
小題4:
A.getB.fitC.readD.have
小題5:
A.rightB.wrongC.sameD.different
小題6:
A.homesickB.heartsickC.seasickD.earsick
小題7:A. the first place  B the last place C. the only place D. the safe place                                                                                                    
小題8:
A.thought overB.thought outC.heard fromD.heard of
小題9:
A.hurtB.hitC.lovedD.moved
小題10:
A.hobbyB.heightC.heavenD.handbag

查看答案和解析>>

科目:初中英語 來源:不詳 題型:閱讀理解

More than 50,000,000 people live in the rainforests of the world and most of them do not hurt the forest they live in. They eat the fruits that grow on the forest trees, but they do not cut them down. They kill some animals to eat, but they do not destroy them.
When we cut down the rainforests, we destroy these forest people, too. In 1900, there were 1,000,000 forest people in the Amazon forest. In 1980, there were only 200,000.
The Yanomami live along the rivers of the rainforest in the north of Brazil. They have lived in the rainforest for about 10,000 years and they use more than 2,000 different plants for food and for medicine. But in 1988, someone found gold in their forest, and suddenly 45,000 people came to the forest and began looking for gold. They cut down the forest to make roads. They made more than a hundred airports. The Yanomami people lost land and food. Many died because new diseases came to the forest with the strangers.
The Yanomami people tried to save their forest, because it was their home. But the people who wanted gold were stronger.
Many forest people try to save their forests. Chico Mendes was famous in Brazil because he wanted to keep the forest for his people. “I want the Amazon forest to help all of us-forest people Brazil, and all the Earth,” he said. A few months later, in December 1988, people who wanted to cut down the forest killed Chico Mendes.
In Borneo, people were cutting down the forest of the Penan people to sell the wood. The Penan people tried to save their rainforest. They made blockades across the roads into the forest. In 1987, they closed fifteen roads for eight months. No one cut down any trees during that time.
In Panama, the Kuna people saved their forest. They made a forest park which tourists pay to visit.
The Gavioes people of Brazil use the forest, but they protect it as well. They find and sell the Brazil nuts(堅(jiān)果) which grow on the forest trees.
小題1:The number of the people living in the Amazon forest in 1980 was _______ of that in1900.
A.halfB.one-thirdC.two-fifthsD.one-fifth
小題2:The people who _______ have destroyed the rainforest of the Yanomami.
A.pick fruits and kill animals to eat
B.use plants for food and medicine
C.have lived there for about ten thousand years
D.made the roads and the airports
小題3:Those people built roads and airports in order to ________.
A.carry away the gold conveniently
B.make people there live a better life
C.stop spreading the new diseases
D.develop the tourism(旅游業(yè)) there
小題4:We can infer the underlined word blockades probably means:
A.包圍B.障礙C.街區(qū)D.通道
小題5: From the passage, we learn that _________.
A.we need wood to build houses, so we have to cut down trees
B.the rainforest people have done something to protect their home
C.to humans, gold is more important than trees
D.we mustn’t cut down any trees or kill any animals

查看答案和解析>>

科目:初中英語 來源:不詳 題型:閱讀理解

Children who spend more time reading with their parents have a greater chance of becoming better readers than those who don’t. With the help from their parents, children can learn techniques to improve their reading skills.
“A lot of parents think after their child learns to read, they should stop reading to them,” Donna George said. “They are sadly mistaken.”
George offers her services to parents at the Title I Learning Centers. She said reading aloud to children may be the most valuable thing parents can do. “It is better for children to hear things at a higher level than where they are,” George said. “Parents are their child’s first teacher.” Parents help their children build listening, phonics, comprehension and vocabulary skills when they read aloud to them.
Before parents can identify reading problems, they should escape the enemy
—television and limit the time their children spend watching television. George suggested not allowing kids to have a TV in their bedrooms, setting a schedule of when kids can watch or keeping a list of how many programs children watch. Louise Joines said while her 14-year-old daughter and 10-year-old son enjoy reading, the television sometimes becomes a distraction. So she tries to build the situation by suggesting books the entire family will enjoy reading together, like the Harry Potter series.
Parents who do not read themselves should not count on their children being interested in it. If parents would read to their children at least 15 minutes every day, children would not have so many problems in school. It is the parents’ job to help build that desire in their children, and of course to know what kind of books to read is also important.
小題1:According to George, reading aloud to children_______________.
A.helps them correct mistakes
B.is helpful to their reading
C.is parents’ first duty to their children
D.can get children out of television’s attraction
小題2:The underlined word (in Paragraph 4 ) means something that_________
A.can improve children’s reading
B.can help children’s right way of reading
C.can make children interested in reading
D.can make children not attentive
小題3:Which of the following is important according to the fourth paragraph?
A.Reading skills.B.Reading speed.
C.Reading materials.D.Reading environment.
小題4:If the passage is not completed, which of the following can follow the fifth
paragraph?
A.Parents choose reading materials for their children.
B.Advice is given to control their children.
C.What TV programs children can watch during reading.
D.How children improve their reading by themselves.
小題5: Which one would be the best title for the passage?
A.Children Spend More Time Reading with Parents.
B.Parents Are Their Child's First Teacher.
C.How Parents Make Their Child a Better Reader.
D.How to Improve Children's Reading Ability.

查看答案和解析>>

科目:初中英語 來源:不詳 題型:閱讀理解



Hu Yaohui, a schoolgirl in Zhejiang province, didn’t want to speak or eat for a week. She kept worrying about her scores on the exam. “I can’t stop thinking about my place in the class,” she said. “I feel stressed out.”
Hu is not the only one who faces stress. According to a recent survey conducted by Wuhan University of Hubei province, 70 percent of the 2,000 students who are going to take the college and high school entrance exams feel under pressure (壓力).
Stress is a normal physical response (反應(yīng)) to things that make people feel worried or break their balance of life in some way.
Stress isn’t always bad. Sometimes, people’s stress is important during emergency situations, such as when a driver has to stop his car to avoid an accident. Sometimes, stress can help people do their best — like while getting ready before a big competition or exam.
However, too much or long-term stress gives people a stress overload (負(fù)荷過多). People with stress overloads may have problems remembering or concentrating on things. They are quick to get angry or lose patience. They may even have other problems, such as sleeping problems, headaches and often getting colds.
The most helpful way to deal with stress overloads is to learn how to manage the stress. For example, you might manage it by getting a good night’s sleep, or by exercising every day.
Another good way to deal with stress is to ask parents or friends for help. Everyone has stress. For many people, stress is so common that it has become a way of life. Don’t be too shy to tell others that you are having a hard time. They may comfort you or give you some useful advice. Sometimes just sharing your problems with someone else can make you feel better.
小題1:Hu Yaohui felt stressed out about ________.
A.her marks on the exams
B.which seat to take during exams
C.not being able to sit in the front
D.not being allowed to eat in class
小題2:According to the survey in Paragraph 2, _______ of the 2,000 students who will take entrance exams feel stressed.
A.nearly half B.a(chǎn)bout 1,400
C.a(chǎn)lmost seven hundredD.a(chǎn)bout one seventh
小題3:Which of the following is TRUE?
A.Stress is a kind of serious heart disease.
B.Stress is always bad for people.
C.Stress is always useless for an exam.
D.Stress is greatly needed sometimes.
小題4:This passage is mainly about “________”.
A.Many students face stress now.
B.People’s stress is always important.
C.How to get less stress
D.How to get good results with the help of stress.

查看答案和解析>>

科目:初中英語 來源:不詳 題型:閱讀理解

Steve Jobs, co-founder and former CEO of US technology giant Apple, has died at the age of 56. Mr Jobs had announced he was suffering from cancer in 2004. Apple said he had been "the source of countless innovations(創(chuàng)新)that enrich and improve all of our lives" and had made the world "immeasurably(無法衡量的)better".
Tributes(贊美之辭) have been made by technology company bosses and world leaders, with US President Barack Obama saying the world had "lost a visionary(有遠(yuǎn)見卓識(shí)的人)". "Steve was among the greatest of American innovators —— brave enough to think differently, bold enough to believe he could change the world, and talented enough to do it," said Mr Obama.
A statement from Mr Jobs's family said they were with him when he died peacefully on Wednesday. "In his public life, Steve was known as a visionary; in his private life, he loved his family deeply," they said, requesting privacy and thanking those who had "shared their wishes and prayers" during his final year.
Apple said the company had "lost a visionary and creative genius(天才) and the world have lost an amazing human being". Tim Cook, who was made Apple's CEO after Mr Jobs stood down in August, said his predecessor had left behind "a company that only he could have built, and his spirit will forever be the foundation of Apple". Flags are being flown at half mast outside the Apple headquarters(總部) in Cupertino, California, while fans of the company have left tributes outside Apple shops around the world.
The heads of other leading technology companies have also paid tribute, including Microsoft boss Bill Gates, who said "For those of us lucky enough to get to work with him, it's been a great honour. I will miss Steve very much."
Facebook founder Mark Zuckerberg thanks Mr Jobs for "showing that what you build can change the world" while Sony Corp president and CEO Howard Stringer said: "The digital age has lost its leading light." South Korea's Samsung, which is involved in a case with Apple over patents(專利), admired Mr Jobs for his "Completely new and different changes to the IT industry".
小題1:Hearing of Steve Jobs’ death, the heads of other leading technology companies have paid tribute and __________.
A.shared the treasure with his family B.suffered from the sad news
C.been involved in a case with AppleD.spoken highly of him
小題2:Obama made a speech at Steve Jobs’ death because _________________.
A. they had been friends for years
B. they had set up an excellent company
C Jobs had played an important role in the development of the IT industry
D. Jobs had changed Obama’s political(政治的) life
小題3: Who became Apple's CEO after Mr Jobs?
A.Tim CookB.Howard StringerC.Mark ZuckerbergD.Barack Obama

查看答案和解析>>

科目:初中英語 來源:不詳 題型:閱讀理解

假如你是一位導(dǎo)游,請(qǐng)根據(jù)下面游客的需求特點(diǎn)給他們從(A-G)中選擇合適的旅游景點(diǎn),其中有兩項(xiàng)是多余的。
Beautiful waterfalls
Main features
Tips: Best time to go &Entry
(A).Detian Falls in Guangxi
The largest naturally formed falls in Southeast Asia
July-November
80 Yuan/person
(B).Hukou Waterfall in Shanxi
The second largest waterfall in China
April-May;
81yuan/person
(C).Jiulong Waterfalls in Yunnan
During rainy season, it is dyed red by the red earth it carries,
especially June and July;
10 Yuan/person
(D).Black Dragon Pool Waterfall in Tai Mount
Legend has it that the undersea dragon palace in East China Sea is connected with the pool, where dragons from the Sea can swim freely.
June-November
125 Yuan/person (Mar. - Oct.)
100 Yuan/person (Nov. - Feb.)
(E).Chishui Waterfall in Guizhou
It’s 76 meters high and 80 meters wide, an AAAA tourist attraction
July-October
40 Yuan/person
(F).Huangguoshu Waterfall in Guizhou
Was added to the Guinness book of world records as the world’s largest waterfall cluster.
summer and autumn, the rainy season,90 Yuan/person in peak season and 70 Yuan/person in off season
(G).Shiliang Waterfall in Zhejiang
There is a stone beam about seven meters long and 1/3 meter wide topping the waterfall, and the narrowest place is o­nly 1/6 meter wide.
60yuan
Opening hours 6:00-19:00
小題1:Anna wants to go somewhere famous in the world.
小題2:David is a student in Yunnan Province, he doesn’t have much money.
小題3:Mr. Green is a busy businessman, he’s now in Taizhou, the day after tomorrow he will have to go back to his company in Beijing.
小題4:Grandpa Li likes travelling in spring.
小題5:Aunt Mary lives in Shandong, she hates to go for a long way, she often feels car sick.

查看答案和解析>>

同步練習(xí)冊答案