题干

   Cellphones, tablets, and computers are keeping children and teenagers awake at night-even when they' re not in use, according to new research. A study published on Monday in JAMA Pediatrics says that media devices are causing kids to sleep less and reducing the quality of sleep that they get. This leads to trouble of staying awake the next day.

Researchers analyzed hundreds of studies of children and teens aged 6-19. The scientists found a strong and consistent association between the use of technology at bedtime and poor sleeping. The reason is not just that kids are staying up too late with their devices. Using a computer can overstimulate the mind and emotions, the researchers say. A smartphone or tablet also gives off a light that affects the body's natural timing. These factors contribute to poor quality sleep. And many kids could be at risk. According to the study,72% of all children and 89% of adolescents have at least one device in their sleep environment. Most of these devices are used near bedtime.

"The harmful association between screen-based devices and kids' sleep is a major public health concern," the study concludes. In their conclusion, the researchers urge parents to understand the damaging influence of device use before sleep.

【小题1】What do the researchers disagree with?
A.Children even in dreams can be influenced by media devices.
B.Most adolescents like to play media devices before sleep.
C.Using media devices on bed makes kids sleep difficultly.
D.Using media devices can not excite the mind and emotions.
【小题2】How does a smartphone affect a child's sleep?
A.By making noises.
B.By giving off a light.
C.By attracting a kid's attention.
D.By sending out electronic waves.
【小题3】What can we learn from the second paragraph?
A.Media devices anytime put kids in danger.
B.Adolescents are more easily affected than children by phones.
C.Using technology at bedtime causes poor sleeping.
D.Media devices affect kid's performance at school.
【小题4】Whom does this article most probably writes to?
A.Scientists.B.Parents.
C.Children.D.Producers.
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同类题1

_【小题1】___ .Being angry doesn’t really solve much, but what people do when they feel angry is important. The goal is to calm down and try to solve what is bothering you. This is hard for some kids and adults, too. Instead of calming down, some kids might keep getting more and more upset until they explode like a volcano!【小题2】___ .Their anger might be so strong that they lose control of their temper. They may act in ways unacceptable and hurtful. People may say that someone has trouble controlling their temper.【小题3】Some kids might get so angry that they scream at their parents, break something , or even worse , hit their brothers or sisters.【小题4】.However, it’s not OK for a kid to do any of those things .Kids don’t want to act in this way , but sometimes angry feelings can be hard to manage. So what to do?Well, the good news is that kids don’t just have to keep making the same mistakes over and over again.【小题5】.Imagine your temper as a puppy inside you that needs some training. The puppy is not bad ---- it will probably turn out a great dog. It just needs to learn some rules because, right now, that puppy is causing some problems to you.
A.In fact, they usually mean that a kid behaves badly when feeling angry.
B.You don’t want to cause trouble.
C.Kids should be allowed to express their feelings, even angry ones.
D.Some kids get angry more often or more easily than some other kids.
E.You can train you temper.
F.Instead of thinking of the person you’re angry with, think of something else.
G.Everybody gets angry sometimes.
 

同类题2

语法填空

EQ is a way of 【小题1】(measure) how a person recognizes emotions in himself or herself and others , and makes these emotional states work better as a group or team. IQ is a value that 【小题2】(indicate) a person's ability to learn, understand, and apply information and skills in a meaningful way. The major 【小题3】(differ)between EQ and IQ is what part of a person's mental abilities they measure; understanding emotions or understanding information.

According to some 【小题4】(theory)of brain function, a high EQ means someone is self-confident ,self-aware, and able to handle difficult emotional experiences. It is often tied directly 【小题5】 the degree of success a person may have in the workplace and in 【小题6】(person)relationships. People with high EQs can often better recognize and control their own emotions, and recognize  emotional states of others 【小题7】(adjust)their behavior accordingly.

A person's IQ, on the other hand, measures concepts like logical reasoning and math skills rather than creative potential or emotional abilities. People with high IQs may be able to learn certain subjects very quickly and make connections between ideas 【小题8】 will be missed by others. They often have great academic success, 【小题9】 they may struggle to find classes that challenge them. The ability to acquire knowledge does not 【小题10】(necessary)mean people can recognize and manage their own emotional states , however.

同类题3

   In the United States alone,over 100 million cell-phones are thrown away each year.Cell-phones are part of a growing mountain of electronic waste like computers and personal digital assistants.The electronic waste stream is increasing three times taster than traditional garbage as a whole.

Electronic devices contain valuable metals such as gold and silver.A Swiss study reported that while the weight of electronic goods represented by precious metals was relatively small in comparison to total waste,the concentration(含量)of gold and other precious metals was higher in So-called e-waste than in naturally occurring minerals.

Electronic wastes also contain many poisonous metals.Even when the machines are recycled and the harmful metals removed,the recycling process often is carried out in poor countries,in practically uncontrolled ways which allow many poisonous substances to escape into the environment.

Creating products out of raw materials creates much more waste material,up to 100 times more,than the material contained in the finished products.Consider again the cell-phone,and imagine the mines that produced those metals,the factories needed to make the box and packaging(包装)it came in.Many wastes produced in the producing process are harmful as well.

The U.S Environmental Protection Agency notes that most waste is dangerous in that"the production, distribution,and use of products-as well as management of the resulting waste-all result in greenhouse gas release." Individuals can reduce their contribution by creating less waste at the start-for instance,buying reusable products and recycling.

In many countries the concept of extended producer responsibility is being considered or has been put in place as an incentive(动机)for reducing waste.If producers are required to take back packaging they use to sell their products,would they reduce the packaging in the first place?

Governments' incentive to require producers to take responsibility for the packaging they produce is usually based on money.Why,they ask,should cities or towns be responsible for paying to deal with the bubble wrap(气泡垫)that encased your television?

From the governments' point of view,a primary goal of laws requiring extended producer responsibility is to transfer both the costs and the physical responsibility of waste management from the government and tax-payers back to the producers.

【小题1】By mentioning the Swiss study,the author intends to tell us that .
A.the weight of e-goods is rather small
B.natural minerals contain more precious metals
C.E-waste deserves to be made good use of
D.the percentage of precious metals is heavy in e-waste
【小题2】The responsibility of c-waste treatment should be extended .
A.from producers to governments
B.from governments to producers
C.from individuals to distributors
D.from distributors to governments
【小题3】What docs the passage mainly talk about?
A.The increase in e-waste.B.The creation of e-waste.
C.The seriousness of e-waste.D.The management of e-waste.

同类题4

When Joshua Blue, a head teacher at the Kennedy, hosts a lecture for his students, he wears a light violet-colored tie. "You don't want so many bright colors that the kids will get distracted," said Blue. Colors give off very specific signals, and different tie colors stand for very different impacts. Wondering what color tie to wear to your next meeting? Here's how to choose the perfect color tie for every occasion:
All powerful reds
It's not a coincidence(巧合)that many politicians wear red-colored ties with light shirts and darker suits. "Red is the powerful color," said Mark Woodman, a trend analyst who studies color in Laurel, Maryland. "There’s something about red that always comes back to strength and passion.” But the tone of your reds matters, too. Darker reds can help build trust, while lighter red and pink ties can be more of a statement about your personal style and be associated with creativity. When you want to convey a sense of ambition, consider a shiny red.
Royal purples
Ross Znavor, an executive in financial services in New York, wears purple ties rather than red to business meetings because the color shows a bit of self-confidence and helps him create lasting first impressions. Purple, traditionally a sign of royalty and wealth is becoming more acceptable in the workplace.
Black affairs
"While you might not wear them to meetings on a regular basis, wearing black ties to a cocktail party or even a dinner is unique and attractive," said Zyla. But remember: the formal black color can feel aggressive in many situations. "Avoid it if you are a green-hand at work," Zyla said.
Right blues
Afraid of sending the wrong message with your tie color? Consider blue as the all-purpose tie. Blue ties are a good investment because the color reminds people of the sky and ocean. "Blue is the safest color to wear," Lindsay said.
【小题1】Why do many politicians prefer red-colored ties?
A.Because they often wear light shirts and darker suits.
B.Because they want to get promoted.
C.Because red is related to strength and passion.
D.Because red gets their message across easily.
【小题2】Who will probably choose the purple ties?
A.Politicians.B.Businessmen.
C.Artists.D.Head teachers.
【小题3】What color tie will you consider if you are a green-hand at work?
A.Red.B.Purple.
C.Black.D.Blue.

同类题5

A team of engineers at Harvard University has been inspired by Nature to create the first robotic fly. The mechanical fly has become a platform for a series of new high-tech integrated systems. Designed to do what a fly does naturally, the tiny machine is the size of a fat housefly. Its mini wings allow it to stay in the air and perform controlled flight tasks.
“It’s extremely important for us to think about this as a whole system and not just the sum of a bunch of individual components (元件),” said Robert Wood, the Harvard engineering professor who has been working on the robotic fly project for over a decade. A few years ago, his team got the go-ahead to start piecing together the components. “The added difficulty with a project like this is that actually none of those components are off the shelf and so we have to develop them all on our own,” he said.
They engineered a series of systems to start and drive the robotic fly. “The seemingly simple system which just moves the wings has a number of interdependencies on the individual components, each of which individually has to perform well, but then has to be matched well to everything it’s connected to,” said Wood. The flight device was built into a set of power, computation, sensing and control systems. Wood says the success of the project proves that the flying robot with these tiny components can be built and manufactured.
While this first robotic flyer is linked to a small, off-board power source, the goal is eventually to equip it with a built-in power source, so that it might someday perform data-gathering work at rescue sites, in farmers’ fields or on the battlefield. “Basically it should be able to take off, land and fly around,” he said.
Wood says the design offers a new way to study flight mechanics and control at insect-scale. Yet, the power, sensing and computation technologies on board could have much broader applications. “You can start thinking about using them to answer open scientific questions, you know, to study biology in ways that would be difficult with the animals, but using these robots instead,” he said. “So there are a lot of technologies and open interesting scientific questions that are really what drives us on a day to day basis.”
【小题1】The difficulty the team of engineers met with while making the robotic fly was that __________.
A.they had no model in their mind
B.they did not have sufficient time
C.they had no ready-made components
D.they could not assemble the components
【小题2】It can be inferred from paragraphs 3 and 4 that the robotic fly __________.
A.consists of a flight device and a control system
B.can just fly in limited areas at the present time
C.can collect information from many sources
D.has been put into wide application
【小题3】Which of the following can be learned from the passage?
A.The robotic flyer is designed to learn about insects.
B.Animals are not allowed in biological experiments.
C.There used to be few ways to study how insects fly.
D.Wood’s design can replace animals in some experiments.
【小题4】Which of the following might be the best title of the passage?
A.Father of Robotic Fly
B.Inspiration from Engineering Science
C.Robotic Fly Imitates Real Life Insect
D.Harvard Breaks Through in Insect Study