Cell Phones:Hang Up or Keep Talking? Millions of people areusing cell phones today. In man - 试题答案网问答

第1题

第二篇 Cell Phones : Hang Up or Keep Talking？ Millions of people are usingcell phones toda

第二篇 Cell Phones : Hang Up or Keep Talking？

Millions of people are usingcell phones today. In many places it is actually considered unusual not to useone. In many countries, cell phones are very popular with young people. Theyfind that the phones are more than a means of communication-having a mobilephone shows that they are cool and connected.

The explosions around theworld in mobile phone use make some health professionals worried. Some doctorsare concerned that in the future many people may suffer health problems fromthe use of mobile phones. InEngland.there has been a serious debate about this issue. Mobile phone companies areworried about the negative publicity of such ideas. They say that there is noproof that mobile phones are bad for your health.

On the other hand, why dosome medical studies show changes in the brain cells of some people who usemobile phones？ Signs of change in the tissues of the brain and head can bedetected with modern scanning(扫描) equipment. In one case, atraveling salesman had to retire at a young age because of serious memoryloss.He couldn't remember even simple tasks. He would often forget the name ofhis own son. This man used to talk on his mobile phone for about six hours aday,every day of his working week,for a couple of years. His family doctorblamed his mobile phone use,but his employer's doctor didn't agree.

What is it that makes mobilephones potentially harmful？ The answer is radiation. High-tech ma- chines candetect very small amounts of radiation from mobile phones. Mobile phonecompanies agree that there is some radiation,but they say the amount is toosmall to worry about.

As the discussion about theirsafety continues,it appears that it's best to use mobile phones less often. Useyour regular phone if you want to talk for a long time. Use your mobile phoneonly when you really need it. Mobile phones can be very useful andconvenient,especially in emergencies. In the future, mobile phones may have awarning label that says they are bad for your health. So for now,it's wise notto use your mobile phone too often.

People buy cell phones for the following reasons EXCEPT that

A.they're popular

B.they're usefuL

C.they're cheap

D.they're convenient

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第2题

请根据短文内容，回答题。 Cell Phones: Hang Up or Keep Talking？Millions of people are using c

请根据短文内容，回答题。

Cell Phones: Hang Up or Keep Talking？

Millions of people are using cell phones today. In many places it is actually considered unusual not to use one. In many countries, cell phones are very popular with young people. They find that the phones are more than a means of communication--having a mobile phone shows that they are cool and connected.＜br＞

The explosions around the world in mobile phone use make some health professionals worded.＜br＞

Some doctors are concerned that in the future many people may suffer health problems from the use of mobile phones. In England, there has been a serious debate about this issue. Mobile phone companies are worded about the negative publicity of such ideas. They say that there is no proof that mobile phones are bad for your health.＜br＞

On the other hand, why do some medical studies show changes in the brain cells of some who use mobile phones？ Signs of change in the tissues of the brain and head can be deteeted with modern scanning (扫描) equipment. In one case, a traveling salesman had to retire at a young age because of serious memory loss. He couldn&39;t remember even simple tasks. He would often forget the name of his own son. This man used to talk on his mobile phone for about six hours a day, every day of his working week, for a couple of years. His family doctor blamed his mobile phone use, but his employer&39;s doctor didn&39;t agree.＜br＞

What is it that makes mobile phones potentially harmful？ The answer is radiation. High-tech machines can detect very small amounts of radiation from mobile phones. Mobile phone companies agree that there is some radiation, but they say the amount is too small to worry about.＜br＞

As the discussion about their safety continues, it appears that it&39;s best to use mobile phones less often. Use your regular phone if you want to talk for a long time. Use your mobile phone only when you really need it. Mobile phones can be very useful and convenient, especially in emergencies. In the future, mobile phones may have a warning label that says they are bad for your health. So for now, it&39;s wise not to use your mobile phone too often.

People buy cell phones for the following reasons EXCEPT that__________. 查看材料

A.they"re popular.

B.they"re cheap.

C.they"re useful.

D.they"re convenient.

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第3题

According to the passage, which of the following statements is true？A．Employees could work

According to the passage, which of the following statements is true？

A．Employees could work at home freely by using cell phones and telecommuting.

B．Employees could escape from work because they had telecommuting and cell phones.

C．Employees were controlled by their employers because of the telecommuting and cell phones.

D．Employees were called up by their employers for seven times within 24 hours.

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第4题

Electric Backpack Backpacks are convenient．They can hold your books，your lunch，and a c

Electric Backpack

Backpacks are convenient．They can hold your books，your lunch，and a change of clothes，leaving your hands free to do other things．Someday，if you don’t mind carrying a heavy load，your backpacks might also power your MP3 player，keep your cell phone running，and maybe even light your way home． Lawrence C．Rome and his colleagues from the University of Pennsylvania in Philadelphia and the Marine Biological Laboratory in Woods Hole3，Mass. ，have invented a backpack that makes electricity from energy produced while its wearer walks．In military actions，search-and-rescue operations，and scientific field studies，people rely increasingly on cell phones，global positioning system（GPS） receivers，night-vision goggles，and other battery-powered devices to get around and do their work．The backpack’s electricity-generating feature could dramatically reduce the amount of a wearer’s load now devoted to spare batteries，report Rome and his colleagues in the Sept．9 Science．

The backpack ’s electricity-creating powers depend on springs used to hang a cloth pack from its metal flame．The frame. sits against the wearer’s back，and the whole pack moves up and down as the person walks． A gear mechanism converts vertical movements of the pack to rotary motions of an electrical generator，producing up to 7.4 watts．

Unexpectedly．tests showed that wearers of the new backpack alter their gaits in response to the pack ’s oscillations．so that they carry loads more comfortably and with less effort than they do ordinary backpacks．Because of that surprising advantage，Rome plans to commercialize both electric and non—electric versions of the backpack．

The backpack could be especially useful for soldiers，scientists，mountaineers，and emergency workers who typically carry heavy backpacks．For the rest of us．power—generating backpacks could make it possible to walk，play video games，watch TV，and listen to music，a11 at the same time．Electricity-generating packs aren’t on the market yet，but if you do get one eventually，just make sure to look both ways before crossing the street!

第 1 题 Backpacks are convenient because

A．they can be very large

B．they can hold as many things as you want to carry．

C．your hands are freed t0 do other things．

D．you do not have to carry things with you．

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第5题

Backpacks are convenient. They can hold your books, your lunch, and a change of clothes, l

eaving your hands free to do other things. Someday, if you don't mind carrying a heavy load, your backpack might also power your MP3 player, keep your cell phone running, and maybe even light your way home.

Scientists from the University of Pennsylvania in Philadelphia and the Marine Biological Laboratory in Woods Hole, Mass., have invented a backpack that makes electricity from energy produced while its wearer walks.

The backpack's electricity-creating powers depend on springs used to hang a cloth pack from its metal frame. The frame. sits against the wearer's back, and the whole pack moves up and down as the person walks. A mechanism with gears collects energy from this motion and transfers it to an electrical generator.

Surprisingly, the researchers found, people walk differently when they wear the springy packs. As a result, wearers use less energy than when lugging regular backpacks. Also, the way the new packs ride on wearers' backs makes them more comfortable than standard packs, the inventors say.

The backpack could be especially useful for soldiers, scientists, mountaineers, and emergency workers who typically carry heavy backpacks. These people often rely on global positioning system (GPS) receivers, night-vision goggles, arid other battery-powered devices to get around and do their work. Because the pack can make its own electricity, users don't need to give up space in their packs to lots of extra batteries.

For the rest of us, power-generating backpacks could make it possible to walk, play video games, watch TV, and listen to music, all at the same time. Electricity-generating packs aren't on the market yet, but if you do get one eventually, just make sure to look both ways before crossing the street!

The first paragraph hints (暗示) ______.

A．backpacks are convenient

B．someday backpacks can generate electricity

C．MP3 players and cell phones can also be put into a backpack

D．backpacks hold things for people so as to free their hands to do other things.

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第6题

Electric BackpackBackpacks are convenient. They can hold your books, your lunch, and a cha

Electric Backpack

Backpacks are convenient. They can hold your books, your lunch, and a change of clothes, leaving your hands free to do other things. Someday, if you don't mind carrying a heavy load, your backpacks might also power your MP3 player, keep your cell phone' running, and maybe even light your way home.

Lawrence C. Rome and his colleagues from the University of Pennsylvania in Philadelphia and the Marine Biological Laboratory in Woods Hole, Mass. , have invented a backpack that makes electricity from energy produced while its wearer walks. In military actions, search-and-rescue operations, and scientific field studies, people rely increasingly on cell phones, global positioning system (GPS) receivers, night-vision goggles, and other battery-powered devices to get around and do their work. The backpack's electricity-generating feature could dramatically reduce the amount of a wearer's load now devoted to spare batteries, report Rome and his colleagues in the Sept. 9 Science.

The backpack's electricity-crew, ring powers depend on springs used to hang a cloth pack from its metal frame. The frame. sits against the wearer's back, and the whole pack moves up and down as the person walks. A gear mechanism converts vertical movements of the pack to rotary motions of an electrical generator, producing up to 7.4 watts.

Unexpectedly, tests showed that wearers of the new backpack alter their gaits in response to the pack's oscillations, so that they carry loads more comfortably and with less effort than they do ordinary backpacks. Because of that surprising advantage, Rome plans to commercialize both electric and non-electric versions of the backpack.

The backpack could be especially useful for soldiers, scientists, mountaineers, and emergency workers who typically carry heavy backpacks. For the rest of us, power-generating backpacks could make it possible to walk, play video games, watch TV, and listen to music, all at the same time. Electricity-generating packs aren't on the market yet, but if you do get one eventually, just make sure to look both ways before crossing the street!

Backpacks are convenient because

A．they can be very large.

B．they can hold as many things as you want to carry.

C．your hands are freed to do other things.

D．you do not have to carry things with you.

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第7题

Electdc Backpack Backpacks are convenient．They can hold your books，your lunch，and a

Electdc Backpack

Backpacks are convenient．They can hold your books，your lunch，and a change of clothes，leaving your hands free to do other things．Someday，if you don，t mind carrying a heavy load，your backpacks might also power your MP3 1 player，keep your cell phone running，and maybe even light your way home．

Lawrence C．Rome and his colleagues from the University of Pennsylvania in Philadelphia2 and the Marine Biological Laboratory in Woods Hole3，Mass．4，have invented a backpack that makes electricity from energy produced while its wcarer walks．In military actions．search—and—rescue operations，and scientific field studies，people rely increasingly on cell phones，global positioning system(GPS)5 receivers，night—vision goggles，and other battery—powered devices to get around and do their work．The backpack，s electricity—generating feature could dramatically reduce the amount of a wearer，s load now devoted to spare batteries，report Rome and his colleagues in the Sept．9 Science6．

The backpack，s electricity—creating powers depend on springs used to hang a cloth pack from its metal frame．The frame. sits against the wearer，s back，and the whole pack moves up and down as the person walks．A gear meehanism converts vertical movements of the pack to rotary motions of an electrieal generator，producing up to 7．4 watts．

Unexpectedly，tests showed that wearers of the new backpack alter their gaits in response to the pack’s oscillations，so that they carry loads more comfortably and with less effort than they do ordinary backpacks．Because of that surprising advantage，Rome plans to commercialize botb electric and uon—electric versions of the backpack．

The backpack could be especially useful for soldiers，scientists，mountaineers，and emergency workers who typically carry heavy backpacks．For the rest of HS，power—generating backpacks could make it possible to walk，play rideo games，watch TV，and listen to music，all at the same time．Electricity—generating packs aren’t on the market yet，but if you do get one eventually，just make sure to look both ways before crossing the street!

根据以上材料回答下面问题：

第 51 题 Backpacks are convenient because

A．they can be very large

B．they can hold as many things as you want to carry．

C．your hands are freed to do other things．

D．you do not have to carry things with you．

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第8题

Cell Phone Lets Your Secret OutYour cell phone holds secrets about you. Besides the names

Cell Phone Lets Your Secret Out

Your cell phone holds secrets about you. Besides the names and ______【51】that you've programmed into it, traces of your DNA linger on the device, according to a new study.

DNA is genetic material that______【52】in every cell. Like your fingerprint, your DNA is unique to you______【53】you have an identical twin. Scientists today routinely analyze DNA in blood, saliva, or hair left______【54】at the scene of a crime. The results often help detectives identify______【55】and their victims. Your cell phone can reveal more about you . _____【56】you might think.

Method J. McFadden, a scientist at McMaster University in Hamilton, Ontario, heard about a crime in which the suspect bled onto a cell phone and later dropped the______【57】. This made her wonder whether traces of DNA lingered on cell phones—even when no blood was involved.

______【58】she and colleague Margaret Wallace of the City University of New York analyzed the flip-open phones of 10 volunteers. They used swabs to collect______【59】traces of the users from two parts of the phone: the outside, where the user holds it, and the______【60】, which is placed at the user's ear.

The scientists scrubbed the phones using a solution made mostly______【61】alcohol. The aim of washing was to remove all detectable traces of DNA. The owners got their phones______【62】for another week. Then the researchers collected the phones and repeated the swabbing of each phone once more.

The scientists discovered DNA that ______【63】to the phone's speaker on each of the phones. Better samples were collected from the outside of each phone, but those swabs also picked up DNA that belonged to other people who had apparently also handled the phone. ______【64】, DNA showed up even in swabs that were taken immediately after the phones were scrubbed. That suggests that washing won't remove all traces of evidence from a criminal's device. So cell phones can now be added to the______【65】of clues that can clinch a crime-scene investigation.

(51)

A．numbers

B．music

C．secrets

D．films

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第9题

Cell Phones 1．Believe it or not，cell phones have been around for over a quarter of a centu

Cell Phones

1．Believe it or not，cell phones have been around for over a quarter of a century．The first commercial cell phone system was developed by the Japanese in 1979，but cell phones have changed a lot since that time．The early cell phones were big and heavy but they have developed into small and light palm sized models．There have been huge developments in their functions，too：we have had call forwarding，text messaging，answering services and hands-free use for years，but now there are countless new facilities，such as instant access to the Internet and receiving and sending photos．

2．Cell phones have become very common in our lives：recent statistics suggest as many as one in three people on the planet now have a cell phone，and most of them say they couldn&39;t live without one． Cell phones are used in every area of our lives and have become a necessary tool，used for essential arrangements，social contact and business．They have made it easier to call for help on the highway．They have made it possible to keep in touch with people“on the move”-when people are traveling．

3．Cell phones have made communication easier and have reduced the need for family arguments!We can use cell phones to let our family know we&39;ll be late or if there&39;s a sudden change of plan or an emergency．Cell phones have eased the worries of millions of parents when their teenagers are out late：they can now contact their children at any time．

4．This does not mean that cell phones are all good news．They have brought with them a number of new headaches for their owners：it costs a lot to replace stolen phones，something that is becoming a frequent occurrence，and have you ever seen such huge phone bills？More serious，however，is the potential health problem they bring：there are fears that radiation from the phones may cause brain tumor(肿瘤)． This may be a time bomb waiting to happen to younger people who have grown up with cell phones that they simply can&39;t live without!

Paragraph 1______

A．Cell phones and the family B．Commercial cell phone systems C．Cell phones in everyday life D．Cell phones for teenagers E．History of cell phones F．Problems with cell phones

Paragraph 2______

A．Cell phones and the family B．Commercial cell phone systems C．Cell phones in everyday life D．Cell phones for teenagers E．History of cell phones F．Problems with cell phones

Paragraph 3______

A．Cell phones and the family B．Commercial cell phone systems C．Cell phones in everyday life D．Cell phones for teenagers E．History of cell phones F．Problems with cell phones

Paragraph 4______

A．Cell phones and the family B．Commercial cell phone systems C．Cell phones in everyday life D．Cell phones for teenagers E．History of cell phones F．Problems with cell phones

Nowadays cell phones are equipped with______．

A．a necessity B．an emergency C．a number of new headaches D．family arguments E．big and light palm-sized models F．countless new facilities

Cell phones are common in our lives and have become______．

A．a necessity B．an emergency C．a number of new headaches D．family arguments E．big and light palm-sized models F．countless new facilities

We can use cell phones to communicate with othors when we encounter______．

A．a necessity B．an emergency C．a number of new headaches D．family arguments E．big and light palm-sized models F．countless new facilities

In spite of many benefits，cell phones have brought for their owners______．

A．a necessity B．an emergency C．a number of new headaches D．family arguments E．big and light palm-sized models F．countless new facilities

请帮忙给出每个问题的正确答案和分析，谢谢！

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Cell Phones:Hang Up or Keep Talking？ Millions of people areusing cell phones today. In man