We can infer from this text that the author is most probably a_____.
A．hunter
B．biologist
C．journalist
D．traveler

未分类题【C2】

未分类题【C17】

未分类题【C18】

判断题第一代金融危机模型的主要特点是多重均衡和自我实现。()

未分类题In a lab in Oxford Universitys experimental psychology department, researcher Roi Cohen Ka-dosh is testing a relatively new brain-stimulation technique which may help people learn and improve their understanding of math concepts. The electrodes(a small piece of metal or other substance that is used to take an electric current)are【C1】______in a tightly fitted cap and worn around the head. The device, run off a 9-volt battery commonly used in smoke detectors, induces only a【C2】______current and can be targeted to【C3】______areas of the brain or applied generally. The mild current reduces the【C4】______of side effects, which has【C5】______possibilities about using it, even in individuals【C6】______a disorder, as a general cognitive【C7】______. Scientists also are investigating its use to treat mood disorders and【C8】______conditions. Dr. Cohen Kadoshs【C9】______work on learning enhancement and brain stimulation is one example of the long journey faced by scientists【C10】______brain-stimulation and cognitive-stimulation techniques.【C11】______other researchers in the community, he has dealt with public【C12】______about safety and side effects, plus【C13】______from other scientists about whether these findings would hold in the wider population. There are also ethical questions about the technique.【C14】______it truly works to enhance cognitive performance, should it be【C15】______to anyone who can afford to buy the device—which already is【C16】______for sale in the U.S.? Should parents be able to perform. such stimulation on their kids without【C17】______? 'Its early days but that hasnt stopped some companies from【C18】______the device and marketing it as a learning tool,' Dr. Cohen Kadosh says. 'Be very【C19】______.' However, if the technique continues to show【C20】______, 'this type of method may have a chance to be the new drug of the 21st century,' says Dr. Cohen Kadosh.【C1】A．soldB．formedC．placedD．dedicated

未分类题【C8】A．on averageB．by contrastC．in generalD．at most

未分类题The rigid higher-education business is about to experience a welcome earthquake. Traditional universities now face a new【C1】______in the form. of massive open online courses, or MOOCs. These digitally-delivered courses, which teach students via the【C2】______or tablet apps, have big【C3】______over their established rivals. With low startup costs and powerful economies of scale, online courses【C4】______lower the price of learning and【C5】______access to it, by【C6】______the need for students to be taught at set times or places. The low cost of【C7】______courses—creating a new one costs about $70,000— means they can be sold【C8】______, or even given away. Clayton Christensen of Harvard Business School considers MOOCs a【C9】______'disruptive technology' that will kill off many【C10】______universities. 'Fifteen years from now more than half of the universities in America will be in bankruptcy,' he【C11】______last year. 【C12】______, traditional universities have a few favorable aspects. As well as teaching, examining and certification, college education creates social capital. Students learn how to【C13】______present themselves, make contacts and roll joints. How can a digital college experience give all of that? The answer may be to【C14】______the two. Anant Agarwal, who runs edX-, one of established MOOCs, proposes an alternative to the【C15】______American four-year degree course. Students could spend an introductory year learning via a MOOC,【C16】______by two years attending university and a final year starting part-time work while【C17】______their studies online. This sort of【C18】______learning might prove more attractive than a four-year online degree. It could also【C19】______those who want to integrate learning with work or child-rearing, freeing them from timetables assembled to【C20】______academics.【C1】A．followerB．innovatorC．competitorD．programmer

未分类题When asked specifically about the creative process, Dr. Schutz explained that fear is most responsible for blocking the creativity of a person. Fear of not being creative. Some people simply【C1】______their creativity in specific circumstances【C2】______others in more extreme circumstances feel unable to be creative【C3】______. Either way, the creative process【C4】______becomes blocked. If youre worried about being creative, its almost certain to【C5】______problems. For the best creative results【C6】______fear and let the ideas flow. Fear of lacking rationality. In order to best share ideas with others we need to【C7】______them in a logical and rational way. At times,【C8】______, its best for the creative process to not worry too much about being logical. Trust your ability to come up with a rational【C9】______when your ideas are put into practice and dont let worrying about logic【C10】______the flow of ideas early on. Fear of humiliation and embarrassment. A fear of feeling inadequate will【C11】______your creativity. When were【C12】______worried about others opinions, the creative ideas will be【C13】______by our own anxieties. There is a time to worry about others【C14】______, but that time is not during the early creative【C15】______. Fear of rejection. People can be very concerned that their idea will be【C16】______completely. Creativity will not【C17】______if a person is worried about a negative outcome. These fears are【C18】______if a person is working outside of whats【C19】______considered practical, feasible or possible. The【C20】______is that this is where some of the best creative ideas come from.【C1】A．trustB．denyC．refuteD．doubt

未分类题'AMZN' is a four-letter word to many booksellers. The online retailer has been【C1】______of killing the bookselling industry. It certainly has【C2】______high street chains. But physical bookstore booksellers may【C3】______from Amazons latest announcement. On January 7th the company【C4】______the option of free delivery—which it calls 'Super Saver'—for book orders under ￡10 in Britain. This follows a【C5】______of the free-delivery option in July 2013, and【C6】______a similar scheme the retailer has introduced in America Amazons aim is to push customers towards its Prime service, which costs ￡49 a year for next-day delivery on orders of any price and also includes its locker service. This preferential treatment has proven【C7】______And they seem to buy more【C8】______than non-Prime customers. But the【C9】______carries a risk. Amazon may【C10】______casual book buyers, for whom a Prime subscription would be【C11】______from shopping online—and send them back to physical shops. Such buyers may【C12】______away from delivery charges that will now【C13】______25% or more of an orders total【C14】______when buying a single book from Amazon. Readers could simply【C15】______their online buying habits, for instance by keeping a reading list and buying several books at a time. And the higher delivery【C16】______will make many books on Amazon as【C17】______as in high-street shops. Yet Amazon, which had a【C18】______Christmas season, selling 426 items each second, may not care if buyers give up physical books.【C19】______surveys show that people prefer the【C20】______of a newly printed book and the ability to crack the spine of a page-turner.【C1】A．remindedB．accusedC．convincedD．approved

未分类题Parents and students are now relying less on taking out loans and more on grants, scholarships and their own income and savings, according to a new report from Sallie Mae. 'Over the last few years theyre considering cost more.【C1】______applying for bank loans, theyre making【C2】______decisions to save on their college【C3】______,' says Sarah Ducich, an author of the report. The large private lender, in conjunction with Ipsos Public Affairs,【C4】______in its seventh annual report that more than half of the cost of college is【C5】______by grants and scholarships, as well as parent income and savings. The average family also【C6】______less on parent and student loans, which【C7】______for 7 percent and 15 percent of the cost,【C8】______. 'But one of the most【C9】______findings of the report,' Ducich says, 'is that【C10】______soaring tuition and fees, families【C11】______in the value of college has remained strong.' Nearly all of the 1,600 parents and students【C12】______said they believed that college is an【C13】______in the future, nearly 90 percent said its needed for a(n) 【C14】______occupation and about 86 percent said they would be【C15】______to stretch financially to pay for college. And although more than two-thirds of families said they planned on borrowing, at least as a last【C16】______. many are increasingly looking for【C17】______to cut costs. Nearly all families reported taking at least one step to make college more【C18】______and on average families took five steps. Seven in 10 said they chose a(n) 【C19】______college to pay in-state tuition and more than half said they lived at home or with【C20】______.【C1】A．Apart fromB．Instead ofC．Regardless ofD．Because of

未分类题The Economist calculates that around the world almost 290 million 15- to 24-year-olds are neither working nor studying: almost a quarter of the planets youth. On the other hand, many of the 'employed' young have only informal and【C1】______jobs. In rich countries more than a third, on average, are on temporary【C2】______which make it hard to【C3】______skills In poorer ones, according to the World Bank, a fifth are【C4】______family labourers or work in the informal economy.【C5】______, nearly half of the worlds young people are either【C6】______the formal economy or contributing less【C7】______than they could. What has caused this【C8】______of joblessness? Young people have long had a raw【C9】______in the labour market. Two things make the problem more【C10】______now. The financial crisis and its consequence had an unusually big【C11】______on them. Many employers【C12】______the newest hires first, so a【C13】______raises youth joblessness disproportionately. Second, the emerging economies that have the largest and fastest-growing【C14】______of young people also have the【C15】______labour markets. Almost half of the worlds young people live in South Asia, the Middle East and Africa They also have the highest【C16】______of young people out of work or in the informal sector. In rich countries with generous welfare states this【C17】______a heavy burden on taxpayers. One estimate suggests that, in 2011, the economic loss from【C18】______young people in Europe【C19】______to $153 billion, or more than 1% of GDP. And failure to employ the young not only【C20】______growth today. It also threatens it tomorrow.【C1】A．regularB．alternateC．continuousD．intermittent

未分类题A set of genes play a role in learning to read and do math, but this ability is not just gene-driven,【C1】______schooling and help from parents are also vital【C2】______. Early mathematical ability and literacy are known to【C3】______in some families, but the genes【C4】______affect this have until now been【C5】______unknown. Scientists looked into a data pool called the Twins Early Development Study, which【C6】______12-year-olds from nearly 2,800 British families. The team compared twins and【C7】______children to see how they【C8】______in tests for maths and reading comprehension, and then matched the childrens genomes. Between 10 percent and half of the genes involved in reading were also involved in math, they found, and tiny variants in these【C9】______genes influence skill level. 【C10】______its also clear how important our life experience is in making us better at one or the other. Its this complex【C11】______of nature and nurture as we grow up【C12】______shapes who we are. Professor Robert Plomin said the study was the first to estimate the【C13】______from DNA alone on learning ability. But, he stressed, the genetic variants that were identified were not【C14】______'literacy or numeracy' genes. 【C15】______they formed part of a more complex mechanism in which many genes each【C16】______a small, but combined, effect on learning ability. 'Children differ【C17】______in how easy or difficult they find learning, and we need to recognize and【C18】______these individual differences,' said Plomin. 'Heritability does not【C19】______that anything is set in stone—it just means it may take more effort from parents, schools and teachers to【C20】______the child up to speed.'【C1】A．asB．soC．thoughD．if

未分类题Harvard professor Harvey Mansfield stirred up controversy recently by criticizing the violent grade inflation at his institution, stating, 'I was told that the most frequently given grade at Harvard right now is an A-.' A recent【C1】______of 200 colleges and universities also found that more than 40 percent of all grades awarded were in the A range. Some argue that these inflated grades are【C2】______for the competitive job market, but at the national level it is a negative-sum game that【C3】______serious costs on society. Because grades are【C4】______at A or A+, grade inflation results in a greater concentration of students at the【C5】______of the distribution. This【C6】______of grades diminishes their value as a(n) 【C7】______of student abilities. There is also evidence that【C8】______grading reduces student effort. As giving low grades puts students at a disadvantage【C9】______to their peers, professors face strong【C10】______to award inflated grades. 【C11】______universities need to take steps to bring it under【C12】______. Recently, some universities have experimented with【C13】______information about the grade distribution for each course either online or on student transcripts. So, if employers are aware that grades in a particular course were high, they might be less【C14】______with the students who earned those grades. Thus, students might seek out tougher courses,【C15】______professors to offer such courses in【C16】______. The administration of Princeton issued a【C17】______that no more than 35 percent of grades awarded in undergraduate courses should be in the A range. These steps may not be【C18】______with students and professors, but its necessary to prevent higher education from【C19】______into Lake Wobegon— 'where... all the children are above【C20】______.'【C1】A．suggestionB．subjectC．studyD．opinion

未分类题Everyone knows that too much time in the sun can expose you to excessive ultraviolet radiation, which can lead to skin cancers.【C1】______thats not going to stop people from cooking themselves【C2】______the perfect tan. The problem has become an【C3】______: more than 3.5 million skin cancers in over 2 million people diagnosed annually in the U.S. 【C4】______our sun-worshipping ways, scientists and the skin-care industry are working hard to 【C5】______out the safest way to tan. A handful of wearable products have【C6】______made it to market that alert wearers of UV radiation【C7】______—they tell you youre about to【C8】______before you can see it. The simplest might be Smartsun wristband, which alerts wearers of UV overexposure with just a【C9】______of color. It starts【C10】______as yellowish-brown when first exposed to UV rays; when it【C11】______pink, thats the warning to seek【C12】______and slather on sunscreen. If you prefer something a little more【C13】______, try the UVeBand, which vibrates when youve had your share of UV rays. Then theres the JUNE, developed and recently【C14】______by Netatmo. The JUNE has UV sensors built into a fake jewel that connect wirelessly to a smartphone, where an app monitors UV【C15】______in real time, alerting when its time to get out of the sun. It also【C16】______your radiation exposure over time,【C17】______you can see how bad your summer has been for your skin, long term. All of these products are designed to help wearers【C18】______their sun time. But none have been reviewed or【C19】______by any health regulatory body, which raises some【C20】______.【C1】A．SinceB．ButC．ThusD．And

未分类题The more parents talk to their children, the faster those childrens vocabularies grow and the better their intelligence develops. In 1995, Betty Hart and Todd Risley of the University of Kansas found a close【C1】______between the number of words a childs parents had spoken to him【C2】______the time he was three and his【C3】______success at the age of nine. At three, children born into professional families had【C4】______30m more words than those from a poorer background. This observation has profound【C5】______for policies about babies and their parents. It sug gests that sending children to 'pre-school'(【C6】______or kindergartens)at the age of four—a favored【C7】______among policymakers—comes too late to【C8】______for educational shortcomings at home.【C9】______, understanding of how childrens vocabularies develop is growing. One of the most striking【C10】______came from Anne Fernald, who has found that the difference【C11】______well before a child is three. Even at the【C12】______age of 18 months, when most toddlers speak only a dozen words, those from【C13】______families are several months behind other more favored children.【C14】______, Dr Fernald thinks the differentiation starts at birth. She【C15】______how quickly toddlers process language by sitting them on their mothers laps and showing them two images; a dog and a ball. A recorded voice tells the toddler to look at the ball while a camera records his【C16】______. This lets Dr Fernald【C17】______the moment the childs gaze begins【C18】______towards the correct image. At 18 months, toddlers from【C19】______backgrounds can identify the correct object in 750 milliseconds—200 milliseconds faster than those from poorer families. This, says Dr Fernald, is a【C20】______difference.【C1】A．conflictB．correlationC．gapD．difference