单选题If only the committee ______ the regulations(规章) and put them into effect as soon as possible.

单选题He is ______ drinker, who has been imbibing for so long that he has figuratively speaking, grown old with the vice.

单选题Researchers from the Shaare Zedek Medical Center and Bar-Ilan University just released a report explaining how a new type of eye drop 27 with 'nanoparticles' could replace the need for glasses or contacts. It's a bit 28 and requires a brief doctor visit, but it apparently works like a charm. The three-step process starts with a 29 of the individual's eye refraction (屈光度), which can be performed with a smartphone. Then, doctors create a very specific laser pattern which is applied to the eye for less than one second. The laser creates tiny 30 in the surface of the cornea. Lastly, special eye drops are applied. 'These nanoparticles go into the shallow ablated patterns generated on the surface of the cornea,' Zeev Zalevsky explained to Digital Trends. 'They change the refraction index inside of those patterns. This corrects the 31 problem the user has. The process of correction can be done at home without the need of a medical doctor.' The procedure is less 32 than traditional laser eye surgery in that it only affects the exterior of the eye and does not require an extensive procedure. However, because the 33 to the eye are so minor, the tiny etchings in the cornea eventually heal themselves and vision 34 degrades. The researchers believe the positive effects of the treatment will last one to two months. Heading to the eye doctor for a reapplication of the laser every two months sounds pretty 35 , but the technology is still in its infancy. Going forward, the researchers are planning additional testing and hope to have something 36 a commercial product available within the next two years. A. alterations B. bacteria C. completely D. complicated E. damaged F. grooves G. inconvenient H. infused I. invasive J. measurement K. resembling L. subsequently M. treat N. visual O. weird

单选题John Smith, being a diligent student, never refuses to______ more responsibilities that are assigned to him.

单选题The average number of hours of sleep that an adult needs is ______.

单选题______friendly she is to everyone!

单选题The firm decided after a board meeting that the old machinery in the factories______with.

单选题One of the questions that is coming into focus as we face growing scarcity of resources of many kinds in the world is how to divide limited resources among countries. In the international development community, the conventional wisdom has been that the 2 billion people living in poor countries could never expect to reach the standard of living that most of us in North America enjoy, simply because the world does not contain enough iron ore, protein, petroleum, and so on. At the same time, we in the United States have continued to pursue super affluence as though there were no limits on how much we could consume. We make up 6 percent of the world's people; yet we consume one-third of the world's resources. As long as the resources we consumed each year came primarily from within our own boundaries, this was largely an internal matter. But as our resources come more and more from the outside world, "outsiders" are going to have some say over the rate at which and terms under which we consume. We will no longer be able to think in terms of "our" resources and "their" resources, but only of common resources. As Americans consuming such a disproportionate share of the world's resources, we have to question whether or not we can continue our pursuit of super affluence in a world of scarcity. We are now reaching the point where we must carefully examine' the presumed link between our level of well-being and the level of material goods consumed. If you have only one crust of bread and get another crust of bread, your well-being is greatly enhanced. But if you have a loaf of bread, then an additional crust of bread doesn't make that much difference. In the eyes of most of the world today, Americans have their loaf of bread and are asking for still more. People elsewhere are beginning to ask why. This is the question we're going to have to answer, whether we're trying to persuade countries to step up their exports of oil to us or trying to convince them that we ought to be permitted to maintain our share of the world fish catch. The prospect of a scarcity of, and competition for, the world's resources requires that we reexamine the way in which we relate to the rest of the world. It means we find ways of cutting back on resource consumption that is dependent on the resources and cooperation of other countries. We cannot expect people in these countries to concern themselves with our worsening energy and food shortages unless we demonstrate some concern for the hunger, illiteracy and disease that are diminishing life for them.

单选题It is not enough to observe behavior and ______ them with physiological events that occur at the same time. A. correlate B. comply C. correspond D. pertain

单选题Man: Where can I get a good deal on computers? Woman: Try ordering them through your school. Question: What does the woman say about computers?

单选题There has been a ______ lack of communication between the union and the management.

单选题He ______ his speech by calling for a vote of thanks for last year's president.

单选题When we (think of) creative people the names that probably (spring to mind) are (those of) men such as Albert Einstein, Pablo Picasso, great artists, inventors and scientists—(a selective) and exceptionally gifted body of men with rare talent and genius.

单选题Peter stays at home without a job, but he gets good ______. A. pay B. salary C. wage D. income

单选题Some journalist had written a(n) ______ about him in which some of the facts were untrue.

单选题Returning from school, ______ .

单选题 The Rise of the Sharing Economy A. Last night 40,000 people rented accommodation from a service that offers 250,000 rooms in 30,000 cities in 192 countries. They chose their rooms and paid for everything online. But their beds were provided by private individuals, rather than a hotel chain. Hosts and guests were matched up by Airbnb, a firm based in San Francisco. Since its launch in 2008 more than 4 million people have used it—2.5 million of them in 2012 alone. It is the most prominent example of a huge new 'sharing economy', in which people rent beds, cars, boats and other assets directly from each other, coordinated via the Internet. B. You might think this is no different from running a bed-and-breakfast. Owning a time share or participating in a car pool. But technology has reduced transaction costs, making sharing assets cheaper and easier than ever—and therefore possible on a much larger scale. The big change is the availability of more data about people and things, which allows physical assets to be divided and consumed as services. Before the interact, renting a surfboard, a power tool or a parking space from someone else was feasible, but was usually more trouble than it was worth. Now websites such as Airbnb, Relay Rides and Snap Goods match up owners and renters; smart phones with GPS let people see where the nearest rentable car is parked; social networks provide a way to check up on people and build trust; and online payment systems handle the billing. What's mine is yours, for a fee C. Just as peer-to-peer businesses like eBay allow anyone to become a retailer, sharing sites let individuals act as an ad hoc (临时的) taxi service, car-hire firm or boutique hotel (精品酒店) as and when it suits them. Just go online or download an app. The model works for items that are expensive to buy and are widely owned by people who do not make full use of them. Bedrooms and cars are the most obvious examples, but you can also rent camping spaces in Sweden, fields in Australia and washing machines in France. As advocates of the sharing economy like to put it, access trumps (胜过) ownership. D. Rachel Botsman, the author of a book on the subject, says the consumer peer-to-peer rental market alone is worth $26 billion. Broader definitions of the sharing economy include peer-to-peer lending or putting a solar panel on your roof and selling power back to the grid (电网). And it is not just individuals: the web makes it easier for companies to rent out spare offices and idle machines, too. But the core of the sharing economy is people renting things from each other. E. Such 'collaborative (合作的) consumption' is a good thing for several reasons. Owners make money from underused assets. Airbnb says hosts in San Francisco who rent out their homes do so for an average of 58 nights a year, making $9,300. Car owners who rent their vehicles to others using Relay Rides make an average of $250 a month; some make more than $1,000. Renters, meanwhile, pay less than they would if they bought the item themselves, or turned to a traditional provider such as a hotel or car-hire firm. And there are environmental benefits, too: renting a car when you need it, rather than owning one, means fewer cars are required and fewer resources must be devoted to making them. F. For sociable souls, meeting new people by staying in their homes is part of the charm. Curmudgeons (脾气倔的人) who imagine that every renter is a murderer can still stay at conventional hotels. For others, the web fosters trust. As well as the background checks carried out by platform owners, online reviews and ratings are usually posted by both parties to each transaction, which makes it easy to spot bad drivers, bathrobe-thieves and surfboard-wreckers. By using Facebook and other social networks, participants can check each other out and identify friends (or friends of friends) in common. An Airbnb user had her apartment trashed in 2011. But the remarkable thing is how well the system usually works. Peering into the future G. The sharing economy is a little like online shopping, which started in America 15 years ago. At first, people were worried about security. But having made a successful purchase from, say, Amazon, they felt safe buying elsewhere. Similarly, using Airbnb or a car-hire service for the first time encourages people to try other offerings. Next, consider eBay. Having started out as a peer-to-peer marketplace, it is now dominated by professional 'power sellers' (many of whom started out as ordinary eBay users). The same may happen with the sharing economy, which also provides new opportunities for enterprise; Some people have bought cars solely to rent them out, for example. H. Existing rental businesses are getting involved too. Avis, a car-hire firm, has a share in a sharing rival. So do GM and Dalmler, two carmakers. In future, companies may develop hybrid (混合的) models, listing excess capacity (whether vehicles, equipment or office, space) on peer-to-peer rental sites. In the past, new ways of doing things online have not displaced the old ways entirely. But they have often changed them. Just as internet shopping forced Wal-mart and Tesco to adapt, so online sharing will shake up transport, tourism, equipment-hire and more. I. The main worry is regulatory uncertainty. Will room-renters be subject to hotel taxes, for example? In Amsterdam officials are using Airbnb listings to track down unlicensed hotels. In some American cities, peer-to-peer taxi services have been banned after lobbying by traditional taxi firms. The danger is that although some rules need to be updated to protect consumers from harm, existing rental businesses will try to destroy competition. People who rent out rooms should pay tax, of course, but they should not be regulated like a Ritz-Carlton hotel. The lighter rules that typically govern bed-and-breakfasts are more than adequate. J. The sharing economy is the latest example of the internet's value to consumers. This emerging model is now big and disruptive (颠覆性的) enough for regulators and companies to have woken up to it. That is a sign of its immense potential. It is time to start caring about sharing.

单选题The government gets a(n) ______ from taxes.