单选题 Questions 12 to 15 are based on the conservation you have just heard.

单选题The ______ from childhood to adulthood is always a critical time for everybody.

单选题 {{B}}Questions 29 to 31 are based on the passage you have just heard.{{/B}}

单选题On the shelves of the country's shops is the usual classification of toys, clothing, appliances and cookware. But over the past month the quality of many of the goods on offer has improved. In part this is because scandals over toxic paint have brought closer scrutiny from inspectors and hence less corner-cutting. But it is also partly because of falling demand for its goods from other countries, which has given its manufacturers and local government a big incentive to work around the country's exportpromotion policies and to sell at home. Its manufacturers are well aware that they operate in one of the few large markets that is still showing a pulse. Retail sales in October were up by 22% compared with the same month in 2007 -- a slight drop from 23.2% in September, but an impressive figure nonetheless. That certainly exaggerates the country's economic vigor, but it would be a stretch to believe that the country is in recession. As domestic consumption increases, its export-oriented manufacturers are under siege (围攻). Figures announced on December 10th showed that exports fell by a startling 2.2% in November, compared with a year earlier. Analysts had expected an increase of around 15%; it was the first fall in exports for seven years. The news followed a government survey, released on December 1st, that showed a sharp decline in the fortunes of export manufacturers, confirming lots of anecdotal evidence. Diverting goods intended for export to the domestic market makes sense for factory owners, who want their firms to survive, and for local officials, who wish to maintain order. As a result of pressure from its trading partners, these tax rebates (折扣) on exports had been contracting. But in November a new stimulus plan was announced that increased the rebates on more than 3,000 items. Evidently its officials hope the country can once again export its way to higher growth, despite the financial troubles in its main markets. One solution is to route goods to the domestic market via a port city, so that they qualify as exports, but this takes time and money and strikes many operators as a huge waste of both. The sudden appearance of higher-quality goods suggests that officials are being less eager than usual in enforcing the export rules. Its consumers, for their part, must surely be pleased that they can buy better products at low prices. A year ago, the boom(繁荣) was expected to be the means of breaking down the divide between its domestic and export-led economies. But perhaps a bust is what was required.

单选题Recent changes in climate may ______ that global warming is starting to have an effect.

单选题Most people are afraid of being operated on ______.

单选题The bed has been _________ in the family, it was my great-grandmother's originally.

单选题We must ______ our strength and swim vigorously up stream.

单选题Since he began work, he hasn't ______ asked his father for money.

单选题A．Organisingprotests.B．Recruitingmembers.C．Actingasitsspokesman.D．Savingendangeredanimals.

单选题 Most of us are taught to pay attention to what is said--the words. Words do provide us with some information, but meanings are derived from so many other sources that it would hinder our effectiveness as a partner to a relationship to rely too heavily on words alone. Words are used to describe only a small part of the many ideas we associate with any given message. Sometimes we can gain insight into some of those associations if we listen for more than words. We don't always say what we mean or mean what we say. Sometimes our words don't mean anything except "I'm letting off some steam. I don't really want you to pay close attention to what I'm saying. Just pay attention to what I'm feeling." Mostly we mean several things at once. A parson wanting to purchase a house says to the current owner, "This step has to be fixed before I'll buy." The owner says, "It's been like that for years." Actually, the step hasn't been like that for years, but the unspoken message is: "I don't want to fix it. We put up with it. Why can't you?" The search for a more expansive view of meaning can be developed of examining a message in terms of who said it, when it occurred, the related conditions or situation, and how it was said. When a message occurs can also reveal associated meaning. Let us assume two couples do exactly the same amount of kissing and arguing. But one couple always kisses after an argument and the other couple always argues alter a kiss. The ordering of the behaviors may mean a great deal more than the frequency of the behavior. A fiend's unusually docile(温顺的) behavior may only be understood by noting that it was preceded by situations that required an abnormal amount of assertiveness. Some responses may be directly linked to a developing pattern of responses and defy logic. For example, a parson who says "No!" to a series of charges like "You're dumb!" "You're lazy!" and "You're dishonest!" may also say "No!" and try to justify his or her response if the next statement is "And you're good looking." We would do well to listen for how messages are presented. The words: "It's surely nice to have you by my side." can be said with emphasis and excitement or ritualistically. The phrase can be said once or repeated several times. And the meanings we associate with the phrase will change accordingly. Sometimes if we say something infrequently it assumes more importance; sometimes the more we say something the less importance it assumes:

单选题 "If the online service is free then you are the product," techies say. Google and Facebook make a fortune by collecting personal information, which helps them target their advertisements more accurately. Free smartphone apps typically suck in all the data they can, such as the person's location or their entire address book. At the same time, governments collect lots of information about everyone, not only through mass surveillance, as the disclosures made by Edward Snowden, but also by gathering common things, such as voter registration and driving-licence records that are then sold on to commercial firms. More than ever, individual privacy is under threat. Julia Angwin, who oversaw a pioneering series of Wall Street Journal articles called "What They Know", started in 2010, exposes many of the questionable activities that erode privacy—activities that most people know nothing about. Hundreds of unregulated data-brokers exist in America, for example, selling dossiers on people to marketing companies. Individuals have little recourse if they want to examine their files or correct mistakes. One company runs a fleet of camer-aequipped cars that scan the number plates of 1 million vehicles a month, mostly to find those wanted for repossession (收回)—but it sells the data to insurers or private investigators as well. Ms Angwin decries this shadowy business. Her book tracks her attempts to wrest freedom from it. She gets a credit card using an alias; she uses an anonymous search engine and encrypts (加密) her e-mail and texts; she leaves LinkedIn. When she turns off basic web-browsing functions that enable tracking (using so-called cookies) she becomes digitally paralysed. Amazon items appear to be out of stock and she is unable to set up an appointment at an Apple store. "My daughter would stand next to me and laugh while I tried to load a page and navigate through all the permissions," she writes. Yet "Dragnet (搜索网) Nation" has its faults. It ignores how exciting the legitimate uses of personal data can be to companies, governments and NGOs. It mixes state surveillance (监控) and privacy-eroding business practices, weakening the study of both. Ms Angwin's analysis of the problems and potential regulatory remedies is shallow, and her attempts to escape the dragnet eventually become wearisome. Her contribution is to have made herself a guinea pig in an experiment to avoid ubiquitous surveillance. But the real story about the economy of personal information and protecting privacy in an age of big data has yet to be written.

单选题

单选题Human memory is notoriously unreliable. Even people with the sharpest facial-recognition skills can only remember so much. It"s tough to quantify how good a person is at remembering. No one really knows how many different faces someone can recall, for example, but various estimates tend to hover in the thousands—based on the number of acquaintances a person might have. Machines aren"t limited this way. Give the right computer a massive database of faces, and it can process what it sees—then recognize a face it"s told to find—with remarkable speed and precision. This skill is what supports the enormous promise of facial-recognition software in the 21st century. It"s also what makes contemporary surveillance systems so scary. The thing is, machines still have limitations when it comes to facial recognition. And scientists are only just beginning to understand what those constraints are. To begin to figure out how computers are struggling, researchers at the University of Washington created a massive database of faces—they call it MegaFace—and tested a variety of facial-recognition algorithms (算法) as they scaled up in complexity. The idea was to test the machines on a database that included up to I million different images of nearly 700,000 different people—and not just a large database featuring a relatively small number of different faces, more consistent with what"s been used in other research. As the databases grew, machine accuracy dipped across the board. Algorithms that were right 95% of the time when they were dealing with a 13,000-image database, for example, were accurate about 70% of the time when confronted with 1 million images. That"s still pretty good, says one of the researchers, Ira Kemelmacher-Shlizerman. "Much better than we expected," she said. Machines also had difficulty adjusting for people who look a lot alike—either doppelgangers (长相极相似的人), whom the machine would have trouble identifying as two separate people, or the same person who appeared in different photos at different ages or in different lighting, whom the machine would incorrectly view as separate people. "Once we scale up, algorithms must be sensitive to tiny changes in identities and at the same time invariant to lighting, pose, age," Kemelmacher-Shlizerman said. The trouble is, for many of the researchers who"d like to design systems to address these challenges, massive datasets for experimentation just don"t exist—at least, not in formats that are accessible to academic researchers. Training sets like the ones Google and Facebook have are private. There are no public databases that contain millions of faces. MegaFace"s creators say it"s the largest publicly available facial-recognition dataset out there. "An ultimate face recognition algorithm should perform with billions of people in a dataset," the researchers wrote.

单选题[此试题无题干]

单选题Passage Two Questions 30 to 32 are based on the passage you have just heard.

单选题[此试题无题干]

单选题A) Moreover C) Therefore B) However D) Furthermore

单选题[此试题无题干]