Text 2 It used to be so straightforward.A team of researchers working together in the laboratory would submit the results of their research to a journal.A journal editor would then remove the authors’names and affiliations from the paper and send it to their peers for review.Depending on the comments received,the editor would accept the paper for publication or decline it.Copyright rested with the journal publisher,and researchers seeking knowledge of the results would have to subscribe to the journal.No longer.The Internet–and pressure from funding agencies,who are questioning why commercial publishers are making money from government-funded research by restricting access to it–is making access to scientific results a reality.The Organization for Economic Co-operation and Development（OECD）has just issued a report describing the far-reaching consequences of this.The report,by John Houghton of Victoria University in Australia and Graham Vickery of the OECD,makes heavy reading for publishers who have,so far,made handsome profits.But it goes further than that.It signals a change in what has,until now,been a key element of scientific endeavor.The value of knowledge and the return on the public investment in research depends,in part,upon wide distribution and ready access.It is big business.In America,the core scientific publishing market is estimated at between$7 billion and$11 billion.The International Association of Scientific,Technical and Medical Publishers says that there are more than 2,000 publishers worldwide specializing in these subjects.They publish more than 1.2 million articles each year in some 16,000 journals.This is now changing.According to the OECD report,some 75%of scholarly journals are now online.Entirely new business models are emerging;three main ones were identified by the report’s authors.There is the so-called big deal,where institutional subscribers pay for access to a collection of online journal titles through site-licensing agreements.There is open-access publishing,typically supported by asking the author（or his employer）to pay for the paper to be published.Finally,there are open-access archives,where organizations such as universities or international laboratories support institutional repositories.Other models exist that are hybrids of these three,such as delayed open-access,where journals allow only subscribers to read a paper for the first six months,before making it freely available to everyone who wishes to see it.All this could change the traditional form of the peer-review process,at least for the publication of papers.27.Which of the following is true of the OECD report?A.It criticizes government-funded research.B.It introduces an effective means of publication.C.It upsets profit-making journal publishers.D.It benefits scientific research considerably.
Text 2 It used to be so straightforward.A team of researchers working together in the laboratory would submit the results of their research to a journal.A journal editor would then remove the authors’names and affiliations from the paper and send it to their peers for review.Depending on the comments received,the editor would accept the paper for publication or decline it.Copyright rested with the journal publisher,and researchers seeking knowledge of the results would have to subscribe to the journal.No longer.The Internet–and pressure from funding agencies,who are questioning why commercial publishers are making money from government-funded research by restricting access to it–is making access to scientific results a reality.The Organization for Economic Co-operation and Development（OECD）has just issued a report describing the far-reaching consequences of this.The report,by John Houghton of Victoria University in Australia and Graham Vickery of the OECD,makes heavy reading for publishers who have,so far,made handsome profits.But it goes further than that.It signals a change in what has,until now,been a key element of scientific endeavor.The value of knowledge and the return on the public investment in research depends,in part,upon wide distribution and ready access.It is big business.In America,the core scientific publishing market is estimated at between$7 billion and$11 billion.The International Association of Scientific,Technical and Medical Publishers says that there are more than 2,000 publishers worldwide specializing in these subjects.They publish more than 1.2 million articles each year in some 16,000 journals.This is now changing.According to the OECD report,some 75%of scholarly journals are now online.Entirely new business models are emerging;three main ones were identified by the report’s authors.There is the so-called big deal,where institutional subscribers pay for access to a collection of online journal titles through site-licensing agreements.There is open-access publishing,typically supported by asking the author（or his employer）to pay for the paper to be published.Finally,there are open-access archives,where organizations such as universities or international laboratories support institutional repositories.Other models exist that are hybrids of these three,such as delayed open-access,where journals allow only subscribers to read a paper for the first six months,before making it freely available to everyone who wishes to see it.All this could change the traditional form of the peer-review process,at least for the publication of papers.27.Which of the following is true of the OECD report?
A.It criticizes government-funded research.
B.It introduces an effective means of publication.
C.It upsets profit-making journal publishers.
D.It benefits scientific research considerably.
B.It introduces an effective means of publication.
C.It upsets profit-making journal publishers.
D.It benefits scientific research considerably.
参考解析
解析：文章第二段首先谈到互联网使得获得科学成果变成现实，接着谈到了最近OECD发布的一个报告，该报告描写了互联网对出版行业的影响，使得盈利不菲的出版商们很头痛（make heavy reading for的意思是让某人读起来很费力）。文章在提到这些出版商时给其加了一个盈利不菲的定语，这说明使其头疼的事情正是与该定语对应，在这里就是会对他们盈利产生不利，故答案为C。
相关考题：
So startling would his results appear to the uninitiate that until they learned the processes by which he had arrived at them they might well consider him as a necromancer._______________________________________________________________________________
Text 2It used to be so straightforward. A team of researchers working together in the laboratory would submit the results of their research to a journal. A journal editor would then remove the authors’ names and affiliations from the paper and send it to their peers for review. Depending on the comments received, the editor would accept the paper for publication or decline it. Copyright rested with the journal publisher, and researchers seeking knowledge of the results would have to subscribe to the journal.No longer. The Internet – and pressure from funding agencies, who are questioning why commercial publishers are making money from government-funded research by restricting access to it – is making access to scientific results a reality. The Organization for Economic Co-operation and Development (OECD) has just issued a report describing the far-reaching consequences of this. The report, by John Houghton of Victoria University in Australia and Graham Vickery of the OECD, makes heavy reading for publishers who have, so far, made handsome profits. But it goes further than that. It signals a change in what has, until now, been a key element of scientific endeavor.The value of knowledge and the return on the public investment in research depends, in part, upon wide distribution and ready access. It is big business. In America, the core scientific publishing market is estimated at between $7 billion and $11 billion. The International Association of Scientific, Technical and Medical Publishers says that there are more than 2,000 publishers worldwide specializing in these subjects. They publish more than 1.2 million articles each year in some 16,000 journals.This is now changing. According to the OECD report, some 75% of scholarly journals are now online. Entirely new business models are emerging; three main ones were identified by the report’s authors. There is the so-called big deal, where institutional subscribers pay for access to a collection of online journal titles through site-licensing agreements. There is open-access publishing, typically supported by asking the author (or his employer) to pay for the paper to be published. Finally, there are open-access archives, where organizations such as universities or international laboratories support institutional repositories. Other models exist that are hybrids of these three, such as delayed open-access, where journals allow only subscribers to read a paper for the first six months, before making it freely available to everyone who wishes to see it. All this could change the traditional form. of the peer-review process, at least for the publication of papers.26.In the first paragraph, the author discusses[A] the background information of journal editing.[B] the publication routine of laboratory reports.[C] the relations of authors with journal publishers.[D] the traditional process of journal publication.
According to the text, online publication is significant in that[A] it provides an easier access to scientific results.[B] it brings huge profits to scientific researchers.[C] it emphasizes the crucial role of scientific knowledge.[D] it facilitates public investment in scientific research.
根据下列文章，回答26～30题。It used to be so straightforward. A team of researchers working together in the laboratory would submit the results of their research to a journal. A journal editor would then remove the authors names and affiliations from the paper and send it to their peers for review. Depending on the comments received, the editor would accept the paper for publication or decline it. Copyright rested with the journal publisher, and researchers seeking knowledge of the results would have to subscribe to the journal.No longer. The Internet and pressure from funding agencies, who are questioning why commercial publishers are making money from government-funded research by restricting access to it- is making access to scientific results a reality. The Organization for Economic Co-operation and Development （OECD） has just issued a report describing the far-reaching consequences of this. The report, by John Houghton of Victoria University in Australia and Graham Vickery of the OECD, makes heavy reading for publishers who have, so far, made handsome profits. But it goes further than that. It signals a change in what has, until now, been a key element of scientific endeavor.The value of knowledge and the return on the public investment in research depends, in part, upon wide distribution and ready access. It is big business. In America, the core scientific publishing market is estimated at between $7 billion and $11 billion. The International Association of Scientific, Technical and Medical Publishers says that there are more than 2,000 publishers worldwide specializing in these subjects. They publish more than 1.2 million articles each year in some 16,000 journals.This is now changing. According to the OECD report, some 75% of scholarly journals are now online. Entirely new business models are emerging; three main institutional subscribers pay for access to a collection of online journal titles through site-licensing agreements. There is open-access publishing, typically supported by asking the author （or his employer） to pay for the paper to be published. Finally, there are open-access archives, where organizations such as universities or international laboratories support institutional repositories. Other models exist that are hybrids of these three, such as delayed open-access, where journals allow only subscribers to read a paper for the first six months, before making it freely available to everyone who wishes to see it. All this could change the traditional form. of the peer-review process, at least for the publication of papers.第26题：In the first paragraph, the author discussesA．the background information of journal editing.B．the publication routine of laboratory reports.C．the relations of authors with journal publishers.D．the traditional process of journal publication
According to the text, online publication is significant in thatA．it provides an easier access to scientific results.B．it brings huge profits to scientific researchers.C．it emphasizes the crucial role of scientific knowledge.D．it facilitates public investment in scientific research.
Cooperating is simply working together ______ teammates ______ the good of the team. A as…for ;B with…at ;C for…on
John told us that by the end of the year they _____ together for thirty years.A. would have been livingB. would have livedC. would have been livedD. will have been living
He said that he would come and _____ he would bring his wife together.A: thatB: whichC: whenD: while
She tried to____ the pages together so that her father would have no difficulty in reading them. A、gatherB、engageC、churchD、dawn
Which of the following commands would be used to move the working directory from C:\ to C:\Windows?() A.CDB.RDC.MDD.SFC
some team leaders think that the only way to （） their team is through cash incentives. However research proves that money is the last thing you would want to useA.arouseB.encourageC.inciteD.motivate
It is said in th．e passage that when the economy slides ( )．A． men would choose working women as their marriage partnersB． more women would get married to seek financial securityC． even working women would worry about their marriagesD． more people would prefer to remain single for the time being
共用题干Napping to a Healthier Heart?1 Researchers say they have developed a simple test that can tell if a person with heart disease is likely to suffer a heart attack.The test measures levels of a protein in the blood.The researchers say people with high levels of this protein are at high risk of heart attack,heart failure or stroke.2 Kirsten Bibbins-Domingo of the University of California in San Francisco led the team.For about four years,they studied almost one thousand patients with heart disease.The researchers tested the heart disease patients for a protein called NT-proBNP.Patients with the highest levels were nearly eight times more likely than those with the lowest levels to have a heart attack,heart failure or stroke.3 The researchers say the presence of high levels of the protein in the blood shows that the heart muscle is under pressure in some way.The study involved mostly men,so the researchers could not say for sure that the results are also true for women.They say the patients with the highest levels of NT-proBNP were older and had other problems like diabetes or high blood pressure.4 Other researchers say more studies are needed to confirm if knowing the protein levels of a heart disease patient should affect that person's treatment.They also would like to know if more aggressive treatment could reduce the patient's chance of a heart attack or stroke.The study appeared in the Journal of the American Medical Association.5 Could a little sleep during the middle of the day reduce the risk of a heart attack?An unrelated study earlier this month in the Archives of Internal Medicine suggests that the answer may be yes.In countries like the United States,afternoon naps are mostly for children.But they are common for adults in Mediterranean countries.And these countries generally have lower rates of heart disease.So scientists in the United States and Greece wondered if naps could play a part.Twenty-three thousand healthy adults took part in the study by Harvard University and the University of Athens.Those who took thirty-minute naps three times a week had a thirty-seven percent lower risk of death from heart problems than people who did not take naps.6 The researchers say napping may improve heart health by reducing stress.They say the research suggests that naps are especially good for working men.But they say not enough female subjects died during the study to judge the benefits for women.According to some researchers,by measuring the levels of NT-proBNP in the blood people may know______.A:where fewer people die from heart problemB:whether they have the risk of heart attack,heart failure or strokeC:would probably have lower rates of heart diseaseD:how to test a person's NT-proBNP level in the blood by himselfE:his heart muscle would be under pressure in some wayF:that napping is of great benefit to women too
共用题干Napping to a Healthier Heart?1 Researchers say they have developed a simple test that can tell if a person with heart disease is likely to suffer a heart attack.The test measures levels of a protein in the blood.The researchers say people with high levels of this protein are at high risk of heart attack,heart failure or stroke.2 Kirsten Bibbins-Domingo of the University of California in San Francisco led the team.For about four years,they studied almost one thousand patients with heart disease.The researchers tested the heart disease patients for a protein called NT-proBNP.Patients with the highest levels were nearly eight times more likely than those with the lowest levels to have a heart attack,heart failure or stroke.3 The researchers say the presence of high levels of the protein in the blood shows that the heart muscle is under pressure in some way.The study involved mostly men,so the researchers could not say for sure that the results are also true for women.They say the patients with the highest levels of NT-proBNP were older and had other problems like diabetes or high blood pressure.4 Other researchers say more studies are needed to confirm if knowing the protein levels of a heart disease patient should affect that person's treatment.They also would like to know if more aggressive treatment could reduce the patient's chance of a heart attack or stroke.The study appeared in the Journal of the American Medical Association.5 Could a little sleep during the middle of the day reduce the risk of a heart attack?An unrelated study earlier this month in the Archives of Internal Medicine suggests that the answer may be yes.In countries like the United States,afternoon naps are mostly for children.But they are common for adults in Mediterranean countries.And these countries generally have lower rates of heart disease.So scientists in the United States and Greece wondered if naps could play a part.Twenty-three thousand healthy adults took part in the study by Harvard University and the University of Athens.Those who took thirty-minute naps three times a week had a thirty-seven percent lower risk of death from heart problems than people who did not take naps.6 The researchers say napping may improve heart health by reducing stress.They say the research suggests that naps are especially good for working men.But they say not enough female subjects died during the study to judge the benefits for women.So far there have not been definite data to confirm______.A:where fewer people die from heart problemB:whether they have the risk of heart attack,heart failure or strokeC:would probably have lower rates of heart diseaseD:how to test a person's NT-proBNP level in the blood by himselfE:his heart muscle would be under pressure in some wayF:that napping is of great benefit to women too
Text 2 It used to be so straightforward.A team of researchers working together in the laboratory would submit the results of their research to a journal.A journal editor would then remove the authors’names and affiliations from the paper and send it to their peers for review.Depending on the comments received,the editor would accept the paper for publication or decline it.Copyright rested with the journal publisher,and researchers seeking knowledge of the results would have to subscribe to the journal.No longer.The Internet–and pressure from funding agencies,who are questioning why commercial publishers are making money from government-funded research by restricting access to it–is making access to scientific results a reality.The Organization for Economic Co-operation and Development（OECD）has just issued a report describing the far-reaching consequences of this.The report,by John Houghton of Victoria University in Australia and Graham Vickery of the OECD,makes heavy reading for publishers who have,so far,made handsome profits.But it goes further than that.It signals a change in what has,until now,been a key element of scientific endeavor.The value of knowledge and the return on the public investment in research depends,in part,upon wide distribution and ready access.It is big business.In America,the core scientific publishing market is estimated at between$7 billion and$11 billion.The International Association of Scientific,Technical and Medical Publishers says that there are more than 2,000 publishers worldwide specializing in these subjects.They publish more than 1.2 million articles each year in some 16,000 journals.This is now changing.According to the OECD report,some 75%of scholarly journals are now online.Entirely new business models are emerging;three main ones were identified by the report’s authors.There is the so-called big deal,where institutional subscribers pay for access to a collection of online journal titles through site-licensing agreements.There is open-access publishing,typically supported by asking the author（or his employer）to pay for the paper to be published.Finally,there are open-access archives,where organizations such as universities or international laboratories support institutional repositories.Other models exist that are hybrids of these three,such as delayed open-access,where journals allow only subscribers to read a paper for the first six months,before making it freely available to everyone who wishes to see it.All this could change the traditional form of the peer-review process,at least for the publication of papers.29.With the open-access publishing model,the author of a paper is required toA.cover the cost of its publication.B.subscribe to the journal publishing it.C.allow other online journals to use it freely.D.complete the peer-review before submission.
Text 2 It used to be so straightforward.A team of researchers working together in the laboratory would submit the results of their research to a journal.A journal editor would then remove the authors’names and affiliations from the paper and send it to their peers for review.Depending on the comments received,the editor would accept the paper for publication or decline it.Copyright rested with the journal publisher,and researchers seeking knowledge of the results would have to subscribe to the journal.No longer.The Internet–and pressure from funding agencies,who are questioning why commercial publishers are making money from government-funded research by restricting access to it–is making access to scientific results a reality.The Organization for Economic Co-operation and Development（OECD）has just issued a report describing the far-reaching consequences of this.The report,by John Houghton of Victoria University in Australia and Graham Vickery of the OECD,makes heavy reading for publishers who have,so far,made handsome profits.But it goes further than that.It signals a change in what has,until now,been a key element of scientific endeavor.The value of knowledge and the return on the public investment in research depends,in part,upon wide distribution and ready access.It is big business.In America,the core scientific publishing market is estimated at between$7 billion and$11 billion.The International Association of Scientific,Technical and Medical Publishers says that there are more than 2,000 publishers worldwide specializing in these subjects.They publish more than 1.2 million articles each year in some 16,000 journals.This is now changing.According to the OECD report,some 75%of scholarly journals are now online.Entirely new business models are emerging;three main ones were identified by the report’s authors.There is the so-called big deal,where institutional subscribers pay for access to a collection of online journal titles through site-licensing agreements.There is open-access publishing,typically supported by asking the author（or his employer）to pay for the paper to be published.Finally,there are open-access archives,where organizations such as universities or international laboratories support institutional repositories.Other models exist that are hybrids of these three,such as delayed open-access,where journals allow only subscribers to read a paper for the first six months,before making it freely available to everyone who wishes to see it.All this could change the traditional form of the peer-review process,at least for the publication of papers.26.In the first paragraph,the author discussesA.the background information of journal editing.B.the publication routine of laboratory reports.C.the relations of authors with journal publishers.D.the traditional process of journal publication.
Text 2 It used to be so straightforward.A team of researchers working together in the laboratory would submit the results of their research to a journal.A journal editor would then remove the authors’names and affiliations from the paper and send it to their peers for review.Depending on the comments received,the editor would accept the paper for publication or decline it.Copyright rested with the journal publisher,and researchers seeking knowledge of the results would have to subscribe to the journal.No longer.The Internet–and pressure from funding agencies,who are questioning why commercial publishers are making money from government-funded research by restricting access to it–is making access to scientific results a reality.The Organization for Economic Co-operation and Development（OECD）has just issued a report describing the far-reaching consequences of this.The report,by John Houghton of Victoria University in Australia and Graham Vickery of the OECD,makes heavy reading for publishers who have,so far,made handsome profits.But it goes further than that.It signals a change in what has,until now,been a key element of scientific endeavor.The value of knowledge and the return on the public investment in research depends,in part,upon wide distribution and ready access.It is big business.In America,the core scientific publishing market is estimated at between$7 billion and$11 billion.The International Association of Scientific,Technical and Medical Publishers says that there are more than 2,000 publishers worldwide specializing in these subjects.They publish more than 1.2 million articles each year in some 16,000 journals.This is now changing.According to the OECD report,some 75%of scholarly journals are now online.Entirely new business models are emerging;three main ones were identified by the report’s authors.There is the so-called big deal,where institutional subscribers pay for access to a collection of online journal titles through site-licensing agreements.There is open-access publishing,typically supported by asking the author（or his employer）to pay for the paper to be published.Finally,there are open-access archives,where organizations such as universities or international laboratories support institutional repositories.Other models exist that are hybrids of these three,such as delayed open-access,where journals allow only subscribers to read a paper for the first six months,before making it freely available to everyone who wishes to see it.All this could change the traditional form of the peer-review process,at least for the publication of papers.30.Which of the following best summarizes the text?A.The Internet is posing a threat to publishers.B.A new mode of publication is emerging.C.Authors welcome the new channel for publication.D.Publication is rendered easier by online service.
The author was required to submit an（）of about 200 words together with his research paper.A.editionB.editorialC.articleD.abstract
共用题干Medical Journals Medical journals are publications that report medical information to physicians and other health professionals. In the past,these journals were available only in print.With the development of electronic publishing, many medical journals now have web sites on the Internet,and some journals are published only online.A few medical journals,like the Journal of the American Medical Association,are considered general medical journals because they cover many fields of medicine.Most medical journals are specialty journals that focus on a particular area of medicine. Medical journals publish many types of articles.Research articles report the results of research studies on a range of topics varying from the basic mechanisms of diseases to clinical trials that compare outcomes of different treatments.Review articles summarize and analyze the information available on a specific topic based on a careful search of the medical literature.Because the results of individual research studies can be affected by many factors,combining results from different studies on the same topic can be helpful in reaching conclusions about the scientific evidence for preventing,diagnosing or treating a particular disease.Case conferences and case reports may be published in medical journals to educate physicians about particular illnesses and how to treat them.Editorials in medical journals are short essays that express the views of the authors,often regarding a research or review article published in the same issue.Editorials provide a perspective on how the current article fits with other information on the same topic.Letters to the editor provide a way for readers of the medical journal to express comments,questions or criticisms about articles published in that journal.Letters to the editor enable readers of a medical journal to express comments on______.A:any medical eventB:articles published in the same issueC:articles published in that journalD:medical development
共用题干Medical Journals Medical journals are publications that report medical information to physicians and other health professionals. In the past,these journals were available only in print.With the development of electronic publishing, many medical journals now have web sites on the Internet,and some journals are published only online.A few medical journals,like the Journal of the American Medical Association,are considered general medical journals because they cover many fields of medicine.Most medical journals are specialty journals that focus on a particular area of medicine. Medical journals publish many types of articles.Research articles report the results of research studies on a range of topics varying from the basic mechanisms of diseases to clinical trials that compare outcomes of different treatments.Review articles summarize and analyze the information available on a specific topic based on a careful search of the medical literature.Because the results of individual research studies can be affected by many factors,combining results from different studies on the same topic can be helpful in reaching conclusions about the scientific evidence for preventing,diagnosing or treating a particular disease.Case conferences and case reports may be published in medical journals to educate physicians about particular illnesses and how to treat them.Editorials in medical journals are short essays that express the views of the authors,often regarding a research or review article published in the same issue.Editorials provide a perspective on how the current article fits with other information on the same topic.Letters to the editor provide a way for readers of the medical journal to express comments,questions or criticisms about articles published in that journal.An article dealing rjth results from different studies on the same topic is called___＿＿.A:a research article B:a review articleC:a case report D:an editorial
Some team leaders think that the only way to ( )their team is through cash incentives. However research proves that money is the last thing you would want to use. A.arouse B.encourage C.incite D.motivate
共用题干New Research Lights the Way to Super-fast Computers1. New research published today in the journal Nature Coniniunications,has demonstrated how glass can be manipulated to create a material that will allow computers to transfer information using light. This development could significantly increase computer processing speeds and power in the future.2. The research by the University of Surrey,in collaboration with the University of Cambridge and the University of Southampton,has found it is possible to change the electronic properties of amorphous chalcogenides,a glass material integral to data technologies such as CDs and DVDs. By using a technique called ion doping,the team of researchers have discovered a material that could use light to bring together different computing functions into one component,leading to all-optical systems.3. Computers currently use electrons to transfer information and process applications.On the other hand,data sources such as the Internet rely on optical systems:the transfer of information using light. Optical fibres are used to send information around the world at the speed of light,but these signals then have to be converted to electrical signal once they reach a computer,causing a significant slowdown in processing.4 .“The challenge is to find a single material that can effectively use and control light to carry information around a computer. Much like how the web uses light to deliver information,we want to use light to both deliver and process computer data,”said project leader,Dr. Richard Curry of the University of Surrey.5 .“This has eluded researchers for decades,but now we have shown how a widely used glass Call be manipulated to conduct negative electrons,as well as positive charges,creating what are known as‘pn-junction'devices. This should enable the material to act as a light source,a light guide and a light detecto—something that can carry and interpret optical information.In doing so,this could transform the computers of tomorrow,allowing them to effectively process infonna- tion at much faster speeds.”6. The researchers expect that the results of this research will be integrated into computers within ten years .In the short term,the glass is already being developed and used in next-generation computer memory technology known as CRAM,which may ultimately be integrated with the advances reported. The result of the research can help computers to increase_________.A: optical informationB: processing speedsC: electronsD:positive chargesE: data technologiesF: all-optical systems
共用题干New Research Lights the Way to Super-fast Computers1. New research published today in the journal Nature Coniniunications,has demonstrated how glass can be manipulated to create a material that will allow computers to transfer information using light. This development could significantly increase computer processing speeds and power in the future.2. The research by the University of Surrey,in collaboration with the University of Cambridge and the University of Southampton,has found it is possible to change the electronic properties of amorphous chalcogenides,a glass material integral to data technologies such as CDs and DVDs. By using a technique called ion doping,the team of researchers have discovered a material that could use light to bring together different computing functions into one component,leading to all-optical systems.3. Computers currently use electrons to transfer information and process applications.On the other hand,data sources such as the Internet rely on optical systems:the transfer of information using light. Optical fibres are used to send information around the world at the speed of light,but these signals then have to be converted to electrical signal once they reach a computer,causing a significant slowdown in processing.4 .“The challenge is to find a single material that can effectively use and control light to carry information around a computer. Much like how the web uses light to deliver information,we want to use light to both deliver and process computer data,”said project leader,Dr. Richard Curry of the University of Surrey.5 .“This has eluded researchers for decades,but now we have shown how a widely used glass Call be manipulated to conduct negative electrons,as well as positive charges,creating what are known as‘pn-junction'devices. This should enable the material to act as a light source,a light guide and a light detecto—something that can carry and interpret optical information.In doing so,this could transform the computers of tomorrow,allowing them to effectively process infonna- tion at much faster speeds.”6. The researchers expect that the results of this research will be integrated into computers within ten years .In the short term,the glass is already being developed and used in next-generation computer memory technology known as CRAM,which may ultimately be integrated with the advances reported. Glass is used in the research to carry and process__________.A: optical informationB: processing speedsC: electronsD:positive chargesE: data technologiesF: all-optical systems
According to the passage，it would be unusual for American Indian poetry to be( ) A.attributed to specific authors B.sung by a group of performers C.chanted while working D.sung during a sacred ceremony
Which of the following commands would be used to move the working directory from C:/ to C:/Windows?（）A、CDB、RDC、MDD、SFC
单选题In what way advertising is changed according to the text?AAdvertisements are produced in a scientific way.BMore research methods are used in creative work.CAll decisions are made based on the results of research.DFocus groups now control the whole process of ad-making.
单选题nancy used a rich text field on a form to capture data. she would like to display the data in a view. which of the following should she do?（）Ause @texttorichtextBuse a richtext title fieldCuse the @text（fieldname） in the column formulaDnothing rich text display in the views