单选题It seems that the writer is very critical of ______.

单选题{{B}}Text 4{{/B}} For millions of years before the appearance of the electric light, shift work, allnight cable TV and the Internet, Earth's creatures evolved on a planet with predictable and reassuring 24-hour rhythms. Our biological clocks are set for this daily cycle. Simply put, our bodies want to sleep at night and be awake during the day. Most women and men need between eight and eight and a half hours of sleep a night to function properly throughout their lives. (Contrary to popular belief, humans don't need less sleep as they age.) But on average, Americans sleep only about seven and a half hours per night, a marked drop from the nine hours they averaged in 1910. What's worse, nearly one third of all Americans get less than six hours of sleep on a typical work night. For most people, that's not nearly enough. Finding ways to get more and better Sleep can be a challenge. Scientists have identified more than 80 different sleep disorders. Some sleeping disorders are genetic. But many problems are caused by staying up late and sleeping in, by traveling frequently between time zones or by working nights. Dr. James F. Jones at National Jewish Medical and Research Center in Denver says that sleep disorders are often diagnosed as other discomforts. About one third of the patients referred to him with possible chronic fatigue syndrome actually have treatable sleep disorders. "Before we do anything else, we look at their sleep, "Jones says. Sleep experts say that most people would benefit from a good look at their sleep patterns. "My motto is 'Sleep defensively'," says Mary Carskadon of Brown University. She says people need to carve out sufficient time to sleep, even if it means giving up other things. Sleep routines—like going to bed and getting up at the same time every day—are important. Pre-bedtime activities also make a difference. As with Elaner, who used to suffer from sleeplessness, a few lifestyle changes—avoiding stimulants and late meals, exercising hours before bedtime, relaxing with a hot bath—yield better sleep.

单选题By saying that "Nobody wants to throw out the baby with the bath water" (Line 1, Paragraph 3), the author implies that

单选题{{B}}Directions:{{/B}}Read the following text. Choose the best word(s) for each numbered blank and mark A, B, C or D on ANSWER SHEET 1. The term authority refers to the rights inherent in a managerial position to give orders and expect the orders to be followed. Authority was a major concept for the classical management writers; they{{U}} (1) {{/U}}it as the glue that held an organization together.It was to be delegated{{U}} (2) {{/U}}to subordinate managers,{{U}} (3) {{/U}}them certain rights while providing certain specified limits{{U}} (4) {{/U}}which to operate. Each management position has certain rights that the position holder{{U}} (5) {{/U}}just bemuse they hold that position. Authority{{U}} (6) {{/U}}to one's position within an organization and ignores the personal{{U}} (7) {{/U}}of the individual manager. It has nothing directly{{U}} (8) {{/U}}the individual{{U}} (9) {{/U}}flows from the position that the individual holds. When a person{{U}} (10) {{/U}}a position of authority, he or she no longer has any authority. The authority remains with the position and{{U}} (11) {{/U}}new holder. When managers delegate authority, commensurate responsibility must be given{{U}} (12) {{/U}}. That is, when one is given the "right" to do something, one also{{U}} (13) {{/U}}a corresponding "obligation" to{{U}} (14) {{/U}}. Allocating authority{{U}} (15) {{/U}}responsibility can create{{U}} (16) {{/U}}for a person, and no one should be{{U}} (17) {{/U}}responsible for something{{U}} (18) {{/U}}which he or she has no authority. Classical writers recognized the{{U}} (19) {{/U}}of equating authority and responsibility.In{{U}} (20) {{/U}},they stated that only authority could be delegated. They supported this contention by noting that the delegate was held responsible for the actions of the people to whom work had been delegated.

单选题The author appears to be very approbatory that

单选题Which of the following countries has Miran not been to?

单选题In paragraph 6 the author implies that

单选题Why does the author say "Ricke doesn't have a lot of time" ?

单选题We can infer from the example of the woolly mammoth that

单选题The iPod revolutionized the way we consume music. The iPhone made us crazy for apps. And now the iPad is getting ready to rock our love lives—or at least help improve our search for someone to communicate with. In late May, Skout.com will become the first dating site to launch an iPad application. The free app will be similar to the version that's already available to phone users: members can enter search criteria, such as age range, gender and physical preferences, and a HotMap will show in real time the locations of active Skout users who fit those criteria. The idea is to help members meet up and see if magic happens. The cool thing about the iPad adaptation, says CEO Christian Wiklund, is that its screen is large enough to let the user view the map while simultaneously chatting and searching through another member's photos. David Evans, editor of onlinedatingpost.com, says we can expect to see more innovative technology in a few months after companies get acquainted with the capabilities of the iPad. "What I'm looking for are dating sites that are optimized for the iPad, with features native to the sleek computing device like (touch screen motions such as) pinch, twist, zoom and shake," he says. "It's the iPad that's going to enable developers to create entirely new ways to browse, discover and connect with singles." Steve Odom, CEO and founder of dating site Gelato, which launched last year and includes a live feed of members' social-media profiles, is redesigning his entire website based on the iPad's appearance. Profile pictures play a key role in online dating, Odom says, and the iPad gives sites an opportunity to play up the presentation of their clientele. "It's big, it's beautiful, and it's perfect for dating sites," says Odom, who plans to unveil the redesign in June. Evans predicts that online dating sites will begin to display their content like a magazine, letting users flip through pages of profiles and enlarge photos while simultaneously texting with one or more others. He says there's also been talk of adding a facial-coding and eye-tracking function that would use a webcam on the iPad to refine suggested matches based on a member's responses to certain profiles. If you grimace, the profile will fade away; if you smile or if your pupils dilate, similar profiles will be suggested. In other words, some day there could be an iPad app for love at first sight.

单选题It is hard to box against a southpaw, as Apollo Creed found out when he fought Rocky Balboa in the first of an interminable series of movies. While "Rocky" is fiction, the strategic advantage of being left-handed in a fight is very real, simply because most fight-handed people have little experience of fighting left-handers, but not vice versa. The orthodox view of human handedness is that it is connected to the bilateral specialisation of the brain that has concentrated language-processing functions on the left side of that organ. Because, long ago in the evolutionary past, an ancestor of humans underwent a contortion that twisted its head around 180° relative to its body, the left side of the brain controls the fight side of the body, and vice versa. In humans, the left brain is usually dominant. And on average, left-handers are smaller and lighter than right-handers. That should put them at an evolutionary disadvantage. Sporting advantage notwithstanding, therefore, the existence of left-handedness poses a problem for biologists. But Charlotte Faurie thinks he knows the answer. As any schoolboy could tell you, winning fights enhances your status. If, in prehistory, this translated into increased reproductive success, it might have been enough to maintain a certain proportion of left-handers in the population, by balancing the costs of being left-handed with the advantages gained in fighting. If that is tree, then there will be a higher proportion of left-handers in societies with higher levels of violence, since the advantages of being left-handed will be enhanced in such societies. Dr. Faurie set out to test this hypothesis. Fighting in modem societies often involves the use of technology, notably firms, that is unlikely to give any advantage to left-handers. So Dr. Faurie decided to confine his investigation to the proportion of left-handers and the level of violence in traditional societies. By trawling the literature, checking with police departments, and even going out into the field and asking people, Dr. Faurie found that the proportion of left-handers in a traditional society is, in- deed, correlated with its homicide rate. One of the highest proportions of left-handers, for example, was found among the Yanomamo of South America. Raiding and warfare are central to Yanomamo culture. The murder rate is 4 per 1,000 inhabitants per year. And, according to Dr. Faufie, 22.6% of Yanomamo are left-handed. In contrast, Dioula-speaking people of Burkina Faso in West Africa are virtual pacifists. There are only 0. 013 murders per 1,000 inhabitants among them and only 3.4% of the population is left-handed. While there is no suggestion that left-handed people are more violent than the right-handed, it looks as though they are more successfully violent. Perhaps that helps to explain the double meaning of the word "sinister".

单选题The tenant of the large estates is to______

单选题Many video games feature an invincibility power-up that makes the players impervious to damage, at least for a while. As the economic crisis hit in late 2008, some said the same about the industry itself. The theory went that sales of video games, which had been strong in 2008, would also be strong in 2009, because games are a relatively cheap form of entertainment that let people escape from gloomy economic reality. At first glance the sales figures seem to debunk the idea that video games are recession-proof. In June 2009, for example, sales of games in America were 31% lower than in June 2008, according to NPD, a market-research firm. In July sales were down 26% , the fifth successive monthly decline. But the year ended with a record-breaking December, as people bought consoles and games for Christmas. Globally, says Piers Harding-Rolls of Screen Digest, a consuhancy, sales of games were down by 6.3% in 2009. The number of Nintendo Win and Microsoft Xbox 360 consoles sold was flat in 2009 ; sales of Sow's PlayStation 3 were up by 22% after a price cut. In some respects, this stumble reflects gaming's new popularity. When it was less of a mainstream activity it was not so connected to the wider economic cycle. The success of the family-friendly Wii has broadened gaming's appeal, but the new players it has attracted are less fanatical garners who are more likely to cut back in hard times. During 2009 more people turned to mobile, web-based or second-hand games, says Mr Harding-Rofls. Another way of looking at things, however, is to say that spending on gaming is driven by big hits, and that the slight decline in 2009 reflects creative rather than economic weakness. Entertainment industries always have their ups and downs, says Shigeru Miyamoto, the creative force behind many of Nintendo's biggest games. There was an unusually large number of hits in 2008, which boosted sales, and fewer big releases in 2009 until late in the year, which may explain the weak mid-year sales. The biggest hit was "Modern Warfare 2", released in November, which became the fastest-selling game in history, selling 7 million copies worldwide on its first day. The top 20 games took a larger share of sales in 2009 than in 2008, which shows that the games industry is becoming increasingly polarised between hits and misses. Hence the hit-and-miss results of the big publishers of video games. Overall, says Mr Miyamoto, 2009's crop of games may just have been less compelling. "We were not able to produce fun-enough products," he says. That highlights the importance of continued innovation, he says—but it leaves unanswered the question of whether gaming is indeed recession-proof.

单选题 In response to scandals rocking the student loan industry, the House has quickly passed reform legislation to require more disclosure from lenders as well as university codes of conduct, and Senate action is expected. But the larger issues of rising college costs and students' increasing dependence on private loans have, for the moment at least, taken a back seat. Yet that doesn't mean they've gone away. College costs have risen far faster than inflation and also outpaced the growth of grant aid and federal loans. Pell grants, for example, which provide money to low-income students, covered nearly 60 percent of the cost of attending a public four-year school in 1986, but by 2005, their value had dropped to 33 percent of the cost, according to the College Board. As a result, more students must turn to costly private loans to finance their education or not go at all. The cost of information technology, the increasing salaries of tenured professors, and even federal loans themselves have all been blamed for college tuition hikes. On the last point, an analysis by the Cato Institute suggests that when aid is provided by the federal government, states and universities reduce their own efforts to make college affordable. Whatever the causes, the Advisory Committee on Student Financial Assistance, an independent committee created by Congress, estimates that 400,000 students who are qualified to attend a four-year college don't do so each year because of financial restrictions. The committee estimates that roughly 40 percent of this group does not attend college at all, which significantly limits future earnings. Many students who do go to college face daunting piles of debt. The College Board estimates that the median debt level of bachelor's degree recipients was ＄19,300 in the 2003-04 school year. In his fiscal 2008 budget, President Bush proposed increasing the maximum Pell grant award to ＄5,400 by 2012 from ＄4,050 today, a change he would pay for with cuts in other loan programs. Even though the scandals are dominating most of the current discussions on Capitol Hill, some education experts praise the fact that student loans are getting any attention at all. Stephen Burd, a senior research fellow at the New America Foundation, says, "This is the first time everyone is dealing with the reality of the fact that private loans have become essential financing for undergraduates."