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28. Not only________ polluted but ________ crowded.A. was the city;were the streetsB. was the city;the streets wereC. the city was;were the streetsD. the city was;the streets were

Thousands of young people leave their villages to seek their_.A. luckB. chanceC. futureD. fortune

Scientists have been trying to figure out how to alter the genes of humans for many years,and it looks like they've finally cracked (破解)the code. But while this may seem like a great step forward in science, some also believe that it's one step back when it comes to ethics(道德准则). In August,a group of scientists from the USA and South Korea worked together to successfully edit a human embryo (胚胎)and remove a genetic mutation (突变)that would have led to heart disease, reported The Guardian. This was done with the help of CRISPR, a gene-editing tool that allows scientists to "cut and paste" human DNA. Although this was the first example of an embryo's genes being changed successfully,the advantages of gene editing have already been tested in living patients. In 2015, a five-month-old girl from the UK was saved after doctors used edited cells to fight off her cancer. As of today,she's alive and well. And in the USA last year, scientists managed to remove HIV cells from several patients by editing the genes inside their bodies. Some people hope that in the future, diseases or birth defects could simply be "edited out". However, others believe this could lead to so-called designer babies, giving parents the option to choose everything from eye color to intelligence. "You could find wealthy parents buying the latest 'upgrades' for their children, leading to even greater inequality than we already live with," Marcy Camovsky, director of the San Francisco Center for Genetics, told BBC News. In spite of these ethical concerns, experts say it's not possible to create the "perfect" human being. Despite the progress scientists have made,we don't understand human genes enough to give all unborn children great brainpower or amazing singing abilities. "Right now,we know nothing about genetic enhancement," Hank Greely, a director at Stanford University, USA, told The New York Times. "We're never going to be able to say, honestly, this embryo looks like it would score high on the two-part SAT." So it looks like if we want good exam results,or to impress people with our piano skills,we'll have to stick with the old fashioned method of plain hard work---at least for now.(1)The underlined word "alter" in Paragraph 1 probably means______.A. recordB. changeC. removeD. increase(2)What was the first successful example of human embryo gene editing?______A. A genetic mutation related to heart disease was removed by scientists.B. A newborn baby with cancer was saved by edited cells.C. HIV cells were removed from patients' bodies.D. Some birth defects were simply edited out.(3)Why do some people consider human gene editing a step backwards?______A. They don't think it is an effective way to fight diseases.B. They are concerned that it could lead to genetic mutations.C. They think it could lead to designer babies and increased inequality.D. They worry that it could make parents abandon children with birth defects.(4)What can we conclude from the text?______A. Gene editing is regarded as the perfect way to treat birth defects.B. There is still a long way to go to fully understand human genes.C. Gene editing could help enhance human intelligence in the near future.D. Scientists are pessimistic (悲观的)about the future of gene editing.

He is not ________ a fool ________.A. such; as he is lookedB. such; as he looksC. as; as he is lookedD. so; as he looks

54. How does the business world view multitasking?A. It is a rare skill often found in fluid organisations.B. It is an adaptable capability required of all workers.C. It is an essential quality many employees lack.D. It is a desirable ability that can be developed.

What I'm telling you is strictly _____ . Do not let anyone know of it.A. secretiveB. specialC. individualD. confidential

Jim's close _____ to his brother made people mistake them for one another.A. confusionB. similarityC. resemblanceD. imitation

43. The policeman warned us that the old bridge. __ away by the floods but he said that a tem-|||-one __ soon.-|||-A.had been sweept, would be built B.has been swept, would be built-|||-C.had been swept, would be build D.had been swept, would be built

8.He seems not to have grasped what I meant,_greatly upsets me.A. itB. whichC. thatD. what

It might have saved me some trouble ______ the schedule.A. did I knowB. have I knownC. do I knowD. had I known

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热门问题

  • 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.

  • 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

  • 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.

  • 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.

  • 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.

  • 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

  • 选择合适的单词补全句子。-|||-I __ in the city.-|||-live lives

  • 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

  • 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).

  • 选择合适的单词补全句子

  • These drugs are available over-the-counter without a(n)__________. ()A. infectionB. dosageC. prescription

  • 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.

  • 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

  • Elder and weaker Mr. Mag paid_visits to his old friends.A. scarceB. rare()C. insufficientD. inadequate

  • 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.

  • 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 ; 单词提示中根小短线代表一个 字母 ) A va---- is a space that contains no air or other gas.

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