Polar bears have patrolled the planet's icy regions for millions of years longer than previously thought — riding out several episodes of global warming in that time. While this suggests their future might not be so bleak, it does not ensure that they will survive the melting occurring in the polar regions today.An international team of researchers has just completed the most comprehensive analysis yet of the polar bear genome (基因组). The team examined DNA from 23 living polar bears and a 110,000-year-old polar bear jawbone. Aided by comparisons with the genomes of brown and black bears, they found that polar bears first emerged as a separate species between four and five million years ago. Previous studies had suggested the species didn't diverge (分化) from brown bears until much later — perhaps just 600,000 years ago.The analysis also showed that polar and brown bears have sometimes interbred (杂交) since their initial divergence and that populations of polar bears have been changing over the past million years in accordance with the climate. Polar bear numbers dropped during warm periods but soared again with prolonged ice ages — most noticeably during a cooling period between 800,000 and 600,000 years ago. The population looks set to fall again as melting pack ice forces polar bears back to the land-based habitats (栖息地) of brown bears, where interbreeding has recently been observed. Should extensive interbreeding occur, both polar and brown bear populations could decline with the emergence of a new hybrid species.The team says that the analysis reveals that polar bear DNA has lost diversity as the population has decreased, drifted apart, and become genetically isolated, suggesting today's bears have less adaptability to environmental change, habitat loss, pollution, and diseases they now face.What does the author say about the future of polar bears?()A They will not survive due to the melting occurring in the polar regions today.B We cannot be sure whether they will survive.C They will certainly survive after patrolling the planet's icy regions for millions of years.D We can help them to ride out the global warming this time again.
introvert cling to go hand in hand with be aware of declaration1. Three months after a powerful tsunami(海啸), his parents still ________ the hope that he was still alive.2. Most students ________ the importance of learning English because English increases the chance of getting a good job.3. Envy is considered one of the seven deadly sins(罪), and it tend to ________ destructive criticism towards the object of envy.4.It is assumed that ________ people are going to be more effective leaders in complex and unpredictable settings.5. The new President announced that any kind of sanctions(制裁) against his country would be taken as a ________ of war.
We are all against your suggestion that the meeting ________.A. was put offB. will be put offC. be put offD. is to put off那这句话如何翻译呢？
The fifth generation computers, with artificial intelligence, ________ and perfected now.A. developedB. have developedC. are being developedD. will have been developed
分录题（共1题，10.0分）1. (10.0分) Complete each phrase only with one word for each blank according to the Chinese expression given.do____ (进展好，情况不错)____ over (变成主要的，取而代之)all the____ (一直)____ time (久而久之；随着时间的推移)out of____ (出于同情)____ one's way (发现到某处的途径)take____ (照管)stay____ (留在原处不动)in____ (跟随)be____ with (关心，感兴趣)
A) orlgins E) spending I)discouraged M)report-|||-B) raise F) rate J)resumes N) recovery-|||-C)additional G) scarce K) -OH-MOHK O)celebrate-|||-D)decreasing H) rise L)protecting-|||-As is the case with so many economic indicators these days, the damage to the work force caused by the recesslon is deep, wide and ongoing.-|||-And unemployment is on the 21 , jumping from 9.4 percent in July to 9.7 percent in August For several survey groups,the-|||-unem ployment 221 is already in double digits(数位)-|||-Worse, hiring is not expected to rebound anytime soon,even If overall economic growth 23 this year. Employers are likely to-|||-fill any 24 workloads by adding hours to workweeks and ending worker vacations. Wage galns,which are always kept-|||-down when jobs are 25 and unemployment is high,will be an even longer time.-|||-Without job growth and pay raises,consumer 26 will not revive (复苏)substantialy because atternative sources of spending-|||-power-home equity and credit cards-are largely tapped out.And without an surge in spending, businesses will not add workers, and so on,in a-|||-decidedly bad cycle.-|||-It has become commonplace to explain each miserable job 27 by saying that a resurgence(苏醒)in employment always lags-|||-general economic 28 willadministration offcla and lawmakers fight for new laws to make it easier to form unions, which are-|||-especially important in raising and 29 the jobs of low-income workers?Will efforts to improve the educational system also-|||-include serious efforts to train and retraln people for new jobs? Help is wanted for 30 Americans.
My schoolmates watched time crawl every afternoon, waiting an ___ for the three o'clock bell. (eternal)
The snake can stay in a tree without moving for ____ a bird may mistake it for a branch.A. quite longB. long enoughC. so longD. very long
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ⅢComplete the following sentences with the given sentence structures-|||-get ready for.sa为························备-|||-e.g.Susan has to buy a lot of things to get ready for her trip.(苏珊不得不买很多东西为旅行做准备。)-|||-1 The boy got up early to __ (为上学做准备).-|||-2 I have a lot of work to do to __ (为明天做准备).
The Harry Potter series, written by J.K. Rowling, is perhaps the most popular set of novels of the modern era. With seven books and many successful films to its name, the series has gathered about 15 billion dollars in sales. How did the series become so popular? The reason can be broken down into several areas.The first book in the series was rejected 12 times before it was picked up by Bloomsbury—a small publisher in England. So receiving this contract was Rowling's first step to success. However, getting a book contract does not ensure the success of a book. The story was soon loved by children and adults alike. In light of this, Bloomsbury Publishing published a second version of the books with “adult” (less colorful and more boring) book covers. This made it easier for a full range of ages to enjoy the series.Another factor that worked like a charm was that the publisher and Rowling herself, through the books, conducted midnight releases, promotions, and pre-ordering more readers. Customers who feared that their local bookstore would run out of copies responded by pre-ordering over 700,000 copies before the July 8, 2000 release.What does the underlined word “releases” (Para. 3) mean?A. The activity that frees or expresses energy or emotion.B. The announcement about the book’s publishing information.C. The sales of books that is available only at midnight.
一、拼写合适的单词补全句子（答案不区分大小写；单词提示中一根小短线代表一个字母） If someone is __ob---__ , they are extremely fat.
question or statement.Hot pot is a traditional dish in China. It is believed to date back more than 1,000 years to the time of the Jin Dynasty. Hot pot's origins can be found in the dining practices of Mongolian horsemen who rode across the steppe and into northern China. Legend has it that the Mongols used their helmets as pots to simmer (炖) broth (汤底) over open fires, and cooked chunks of meat in the broth.Hot pot cooking seems to have spread to northern China during the Tang Dynasty. In the regional variations developed with different ingredients such as seafood. In the centuries that witnessed the growth of the Song Dynasty, hot pot moved — and changed — further south, with each successive region adapting it to their local ingredients and tastes.The ingredients in a hot pot vary a lot from region to region. Perhaps the most famous hot pot is the Chongqing or Sichuan hot pot. It features a dark red broth chock-full (塞满了的) of spices, chili peppers, and the uniquely mouth-numbing Sichuan peppers. In Beijing and elsewhere in the north, hot pot broth tends to be mild and, compared to its racy southern "cousins", a little light. In the northeast of China, a kind of local sauerkraut (酸菜) is used to add some tang (强烈的味道), making the broth a bit sour. People can choose a version of hot pot according to their taste.1 Hot pot is believed to date back more than 1,000 years to the time of _______.A. the Jin Dynasty B. the Tang DynastyC. the Song Dynasty D. the Yuan Dynasty
选择合适的单词补全句子。-|||-I __ in the city.-|||-live lives
拼写合适的单词补全句子 ( 答案不区分大小写 ; 单词提示中一根小短线代表一个 字母 ) If there is a bo-- in the economy, there is an increase in economic activity.
拼写合适的单词补全句子(答案不区分大小写;单词提提示中一根小短线代表一个字母)Something that is inf- - - - - has no limit,end,or edge.
These drugs are available over-the-counter without a(n)__________. （）A. infectionB. dosageC. prescription
Elder and weaker Mr. Mag paid_visits to his old friends.A. scarceB. rare()C. insufficientD. inadequate
拼写合适的单词补全句子 ( 答案不区分大小写 ; 单词提示中根小短线代表一个 字母 ) A va---- is a space that contains no air or other gas.
拼写合适的单词补全句子 ( 答案不区分大小写 ; 单词提示中一根小短线代表一个 字母 ) To enh ---- something means to improve its value, quality, or attractiveness.
The coming of the railways in the 1830s ________ our society and economic life.A. transferredB. transformedC. transportedD. transmitted
The increase in international business and in foreign investment has created a need for executives with knowledge of foreign languages and skills in cross-cultural communication. Americans, however, have not been well trained in either area and, consequently, have not enjoyed the same level of success in negotiation in an international arena as have their foreign counterparts. Negotiating is the process of communicating back and forth for the purpose of reaching an agreement. It involves persuasion and compromise, but in order to participate in either one, the negotiators must understand the ways in which people are persuaded and how compromise is reached within the culture of the negotiation. In many international business negotiations abroad, Americans are perceived as wealthy and impersonal. It often appears to the foreign negotiator that the American represents a large multi-million-dollar corporation that can afford to pay the price without bargaining further. The American negotiator’s role becomes that of an impersonal supplier of information and cash. In studies of American negotiators abroad, several traits have been identified that may serve to confirm this stereotypical perception, while undermining the negotiator’s position. Two traits in particular that cause cross-cultural misunderstanding are directness and impatience on the part of the American negotiator. Furthermore, American negotiators often insist on realizing short-term goals. Foreign negotiators, on the other hand, may value the relationship established between negotiators and may be willing to invest time in it for long-term benefits. In order to solidify the relationship, they may opt for indirect interactions without regard for the time involved in getting to know the other negotiator. Clearly, perceptions and differences in values affect the outcomes of negotiations and the success of negotiators. For Americans to play a more effective role in international business negotiations, they must put forth more effort to improve cross-cultural understanding. [共5题](1)What kind of manager is needed in present international business and foreign investment? [本题2分]A. The man who represents a large multi-million-dollar corporation. B. The man with knowledge of foreign languages and skills in cross-cultural communication. C. The man who is wealthy and impersonal. D. The man who can negotiate with his foreign counterparts.
6. The children will now play some pieces of music that they ______ themselves. A.were taught posed C.accomplished D.worked7. While she waited,she tried to ______ her mind with pleasant thoughts of the vacation. A.occupy pose C.think D.intensify8. In the film,the peaceful life of a monk ______ the violent life of a murderer. A.is compared with B.is compared to C.is contrasted to D.is contrasted with9. ______ to pay for an order is simplicity itself. A.Use plastic B.Using plastics C.Using plastic D.Used plastic10. Additional time is required for cooking or ______ homemade dishes. A.chill B.to chill C.chilled D.chilling
选择合适的单词补全句子
拼写合适的单词补全句子（答案不区分大小写；单词提示中一根小短线代表一个字母） Someone or something that is so---- is very serious rather than cheerful or humorous.
拼写合适的单词补全句子 ( 答案不区分大小写 ; 单词提示中一根小短线代表一个字母 ) A seq----- of events or things is a number of events or things that come one after another in a particular order.
If you_________in a job for several years, you may be able to accumulate a lot of work experience and skills that would be beneficial to your future career development.A. have workedB. had workedC. have been workingD. had been working
拼写合适的单词补全句子 ( 答案不区分大小写 ; 单词提示中一根小短线代表一个 字母 ) To aut _ _ _ _ _ a factory , office , or industrial process means to put in machines which can do the work instead of people.