A large fraction of the heat input to the main engine and auxiliary engines is wasted as a latent heat in the exhaust gases.Smaller but significant fractions are lost via cooling of the jacket water,lube oil,and inlet air.For example,the fractions of heat input of a two-stroke main engine might be 35% to exhaust gases,15% to jacket water,5%to lube oil and 5% to all kinds of coolers.The diesel engine exhaust gas temperature is at least 600℃ at full load,so it is feasible to extract part of its heat.With the installation of the turbochargers on main engines,much waste heat in the exhaust has been used to drive the turbochargers,which increase the inlet density,resulting in a great increase of engine output.The exhaust gases from the turbochargers are still at a high temperature,and it is possible to make further use of the high temperature gases to produce usable steam.For this purpose,exhaust gas boilers have been widely used and waste heat systems have been formed on board. (1)According to the passage,about ____ of the total heat input of a two-stroke main engine is discharged to the exhaust gases.A.one quarterB.one-thirdC.halfD.two-thirds(2)According to the passages,the diesel engine exhaust gas temperature is at least ____ at full load.A.600℃B.400℃C.315℃D.200℃(3)With the installation of the turbocharger on main engine,a great increase of engine output result s from ____ .A.decreased exhaust gas temperatureB.increased inlet air densityC.increased exhaust gas temperatureD.decreased inlet air density(4)In the next paragraph of the passage,which of the following statements may probably be described? ____ A.n auxiliary boiler.B.A fresh water generator.C.A waste heat boiler.D.A turbocharger.
Part 2: 根据中文释义,选择两个选项,组合成正确的单词_________ _________愿意;乐意farewellteerwillingvolunness
Part 4:看句子,选出高亮单词的中文释义Social support consists of the exchange ofresources among people based on theirinterpersonal ties.n. 回答n. 责任n. 资源n. 来源
Part 6: 看句子,根据所给字母提示,完成单词拼写,每条横线代表一个字母(请注意单复数和时态变化)The rumors Leary cir _ _ _ _ _ _ _ _ soon attracted a great deal of publicity.
Part 5: 看句子,选出高亮单词的英文释义The boys are underline(spinning) a wheel.A. vt. put paper or cloth over sth. to cover itB. vt. to make sth. turn round and round quicklyC. vt. repair a hole in sth. by putting a piece of sth. else over itD. vt. to flow quickly and in large amount
Over the years, I have noticed that it has become more and more difficult to set aside those special moments of the day when we can remove ourselves from the busy, crazy pace of everyday life. Yet finding time to get away, to reflect, to concentrate, or to just let the mind wander freely is important for our overall health. Studies have shown that reducing stress in daily life significantly reduces the risk of heart attacks or the need for heart operation. I remember the days when simply driving to and from work supplied me with the time I needed each day. Now, with a cell phone by my side, those days are over. I can be reached anytime, anywhere—even in my car. It was once believed that the American housewife's life would be less busy and stressful with the introduction of appliances such as refrigerators, washing machines, dryers, dishwashers (洗碗机), and microwave ovens. They were wrong. Although modern conveniences may have made many people more productive and thereby able to free up valuable time, it also increased their work load —because with the extra time, many individuals merely added more chores (琐事) to their day.A) attacksB) appliancesC) reducedD) reducingE) combinedF) convenientG) therebyH) wanderI) reachedJ) conveniencesK) quicklyL) suppliedM) providingN) crazyO) load
Part 3: 看中文,选出或补全正确的英文表达_____创造精神A. an ethos of creativityB. a spirit of fancyC. an encouragement of imaginationD. a culture of innovation
Part 6: 看句子,根据所给字母提示,完成单词拼写,每条横线代表一个字母(请注意单复数和时态变化)The number of people who could af ____ ____ ____ ____ to take a trip into space would move into the millions.
Part 4:看句子,选出高亮单词的中文释义We all need to look for ways to reduce our carbon footprint.A. 影响B. 吸收C. 规划D. 足迹
Part 3: 看中文,选出或补全正确的英文表达_ boxed(和而不同)harmony without uniformityconsensus with identityunity without similaritypeace with uniqueness
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) 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.
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).
These drugs are available over-the-counter without a(n)__________. ()A. infectionB. dosageC. prescription
The coming of the railways in the 1830s ________ our society and economic life.A. transferredB. transformedC. transportedD. transmitted
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
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;单词提提示中一根小短线代表一个字母)Something that is inf- - - - - has no limit,end,or edge.
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 ) To enh ---- something means to improve its value, quality, or attractiveness.
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.
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
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.
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
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.