全部答案
全部习题答案
第一章（1）下列说法正确的是__ ___。
Aθ，变化的情况A．轨道角度分布图表示波函数随φB．电子云角度分布图表示波函数随θ，φ变化的情况C．轨道角度分布图表示电子运动轨迹D．电子云角度分布图表示电子运动轨迹（2）在多电子原子中，各电子具有下列量子数，其中能量最高的电子是。
DA. 2，1，－1，21B. 2，0，0，－21C. 3，1，1，－21D. 3，2，－1，21（3）用来表示核外某一电子运动状态的下列量子数中合理的一组是_____。
DA. 1，2，0，-21B. 0，0，0，+21C. 3，1，2，+21D. 2，1，-1，-21（4）39号元素钇的电子排布式应是下列排布的哪一种。
AA. 1s22s22p63s23p63d104s24p64d15s2B. 1s22s22p63s23p63d104s24p65s25p1C. 1s22s22p63s23p63d104s24p65s24d1D. 1s22s22p63s23p63d104s24p65s25d1（5）已知某元素+3价离子的电子排布式为1s22s22p63s23p63d5，该元素在元素周期表中属于_____。
CA. ⅤB族B. ⅢB族C. Ⅷ族D. ⅤA族（6）下列4种电子构型的原子中第一电离能最低的是____ __。
BA. n s2n p3B. n s2n p4C. n s2n p5D. n s2n p6（7）下列分子中既有σ键又有π键的是 C、AA. N2B. MgCl2C. CO2D. Cu（8）下列分子中键级等于零的是___ ___。
CA. O2B. Be2C. Ne2D. Cl2（9）下列化合物中哪一个氢键表现得最强？____ __ DA. NH3B. H2OC. HClD. HF（10）下列分子中具有顺磁性的是___ ___。
CA. B2B. N2C. O2D. F2He分子不存在，是因为He2分子的电子排布式为______。
[工学]环境工程原理第二版全部课后答案
![[工学]环境工程原理第二版全部课后答案](https://img.taocdn.com/s3/m/59f3648b964bcf84b8d57b54.png)
第I篇习题解答第一章绪论1.1简要概述环境学科的发展历史及其学科体系。
解：环境学科是随着环境问题的日趋突出而产生的一门新兴的综合性边缘学科。
它经历了20世纪60年代的酝酿阶段，到20世纪70年代初期从零星的环境保护的研究工作与实践逐渐发展成为一门独立的新兴学科。
环境学科是一门正在蓬勃发展的科学，其研究范围和内涵不断扩展，所涉及的学科非常广泛，而且各个学科间又互相交叉和渗透，因此目前有关环境学科的分支学科还没有形成统一的划分方法。
图1-1是环境学科的分科体系。
图1-1 环境学科体系1.2 简要阐述环境工程学的主要任务及其学科体系。
解：环境工程学作为环境学科的一个重要分支，主要任务是利用环境学科以及工程学的方法，研究环境污染控制理论、技术、措施和政策，以改善环境质量，保证人类的身体健康和生存以及社会的可持续发展。
图1-2是环境工程学的学科体系。
环境工程学环境净化与污染控制技术及原理生态修复与构建技术及原理清洁生产理论及技术原理环境规划管理与环境系统工程环境工程监测与环境质量评价水质净化与水污染控制工程空气净化与大气污染控制工程固体废弃物处理处置与管理物理性污染控制工程土壤净化与污染控制技术废物资源化技术环境学科体系环境科学环境工程学环境生态学环境规划与管理图1-2 环境工程学的学科体系1.3 去除水中的悬浮物，有哪些可能的方法，它们的技术原理是什么？解：去除水中悬浮物的方法主要有：沉淀、离心分离、气浮、过滤（砂滤等）、过滤（筛网过滤）、反渗透、膜分离、蒸发浓缩等。
上述方法对应的技术原理分别为：重力沉降作用、离心沉降作用、浮力作用、物理阻截作用、物理阻截作用、渗透压、物理截留等、水与污染物的蒸发性差异。
1.4 空气中挥发性有机物（VOCs）的去除有哪些可能的技术，它们的技术原理是什么？解：去除空气中挥发性有机物（VOCs）的主要技术有：物理吸收法、化学吸收法、吸附法、催化氧化法、生物法、燃烧法等。
上述方法对应的技术原理分别为：物理吸收、化学吸收、界面吸附作用、氧化还原反应、生物降解作用、燃烧反应。
英语国家概况-谢福之-课后答案(全部)
判断题Chapter 11.People in different parts of Britain like to use the name England to refer to their country.(F)2.The Severn River is the longest river of Britain, which originates in Wales and flowsthrough western England.(T)3.Today more than half of the people in Wales still speak the ancient Welsh language. (F)4.In terms of population and area, Northern Ireland is the second largest part of Britain.(F)5.Although the climate in Britain is generally mild, the temperature in northern Scotlandoften falls below -10℃ in January . (F)6.The majority of the people in Britain are descendants of the Anglo-Saxons.(T)7.The Celtic people were the earliest known inhabitants of Britain.(T)8.English evolved into what is now described as Modern English from the late 16thcentury.(F)Chapter 21.British history before 55BC is basically undocumented.(T)2.The Anglo-Saxons came to Britain in the 5th century.(T)3.The chief or king of the Anglo-Saxons tribes exercised power at their own will. (F)4.The Vikings began to attack the English coast in the 8th century.(T)5.HenryⅡ built up a large empire which included England and most of France.(T)6.The Magna Carta was designed to protect the rights of both the privileged class and thetownspeople.(F)7.The Hundred Years’War (1337-1453) was a series of wars fought between the British andthe Vikings for trade and territory.(F)8.In an effort to make a compromise between different religious factions, QueenElizabethⅠactually defended the fruit of the Reformation.(T)Chapter 31.Conventions are regarded less important than the statutory law in the working of theBritish government.(T)2.The British monarchy has never been interrupted throughout the history.(F)3.In reality, the British King or Queen is the source of all government powers.(F)4.The British Parliament is the law-making body of the Commonwealth of Nations.(F)5.The members of the House of Commons are appointed rather than elected.(F)6.The British Prime Minister is the leader of the majority party in Parliament.(T)7.Cabinet members are chosen by the Prime Minister from various political parties inParliament.(F)8.The legal systems in England, Wales, Scotland and Northern Ireland are much similar interms of law, organization and practice.(T)Chapter 41.British was the first industrialized nation in the world.(T)2.The British economy experienced a relative decline during the post-war period.(T)3.Limited resources and high unemployment rate were persistent problems thatprevented rapid economic development in Britain after World WarⅡ.(F)4.Thatcher’s revolution turned out to be a great success in dealing with all the Britisheconomic and social problems.(F)5.The economic approach adopted by Tony Blair was different from that of the old LaborParty and the Conservative Party.(T)6.Blair made the Bank of England independent in order to separate politics from economicpolicy.(T)7.Britain is an important oil exporter since its oil industry has a long history.(F)8.Nuclear power is one of the major energy source in Britain.(T)Chapter 51.The British government has been responsible for education since the early 1800s.(F)cation in Britain is compulsory for all children between the ages of 6 and 15.(F)3.The National Curriculum is compulsory in both the state system and the independentsystem.(F)4.When children finish their schooling at 16, they are required to take a national GCSEexamination.(T)5.Graduates from state schools in Britain have a less favorable chance to enter famousuniversities than those from independent schools.(T)6.The Times is the wo rld’s oldest Sunday newspapers.(F)7.The BBC World Service broadcasts only in English throughout the world.(F)8.Some British holidays are celebrated to mark important events in the Christian calendar,and some others are related to local customs and traditions.(T)Chapter 81.The eastern highlands formed by the Appalachians hold one third of the country's continental territory.(F)2.The climate in the United States can be classified as temperate,with some mild subtropical and tropical zones.(T)3.Almost through the middle of the United States, north to south,runs a well--known 50-centimeter rainfall line.(T)4.New York is the commercial and financial center of the United States , and it is composed of five boroughs including Manhattan, Brooklyn, the Bronx, Staten Island, and Queens.(T)5.San Francisco is the second largest city after New York and the world famous Hollywoodand Disneyland are located here.(F)6.During the 1830s and 1840s, many northern Europeans and Irish immigrants came to America.(T)7.Almost half of the immigrants coming to the United States in the 1980s were Asians.(T)8.Basic American cultural values are freedom, equality and desire to work hard for a higher standard of living.(T)Chapter 91.America was named after Amerigo Vespucci, who arrived on the new continent after Columbus.(T)2.The second Continental Congress was held in Philadelphia, and the Continental Army and Navy were founded under the command of Thomas Jefferson.(F)3.The Civil War not only put an end to slavery, but also decided that America was a single, indivisible nation.(T)4.Most American people approved of the Vietnam War.(F)5.In 1990, American troops and the troops from allied nations launched Operation DesertStorm in order to drive Iraqi troops out of Kuwait.(T)6.According to the American administration, Saddam Hussein and Osama bin Laden were responsible for the terrorist event on September11,2001.(F)7.The America government regarded Iraq a nation among the "axis of evil".(T)8.On March 19,2003,American and United Nation's troops, supported by several other countries, began an invasion of Iraq.(F)Chapter 101.The Bill of Rights was written into the Constitution in 1787.(F)2.The form of American government is based on three main principles: federalism, the separation of powers, and respect for the Constitution and the rule of law.(T)3.The U.S. Congress is the legislative branch of the federal government and it consists of two houses: the House of Commons and the House of Lords.(F)4.The judicial branch of the federal government consists of a series of courts: the SupremeCourt, the courts of appeals and the district courts.(T)5.The Democratic Party is conservative in terms of its ideology.(F)6.The American presidential campaign adheres to the "winner-take-all" practice.(T)7.The American foreign policy throughout the World War II was neutrality.(F)8.The American foreign policy during the Cold War period was containment and intervention.(T)Chapter 111.America is the world's largest industrial nation.(T)2.In the U.S. Constitution, the recognition of the importance of "intellectual property" could be identified.(T)3.Although slavery was abolished as a result of the Civil War, the owners of plantation in the South made more profits from selling their agriculture products.(F)4.President Roosevelt's New Deal had little effect in dealing with the economic crisis in theearly 1930s.(F)5.The 1960s was a period of consolidation for the American businesses.(F)6.American agricultural exports outweigh imports, leaving a surplus in the agricultural balance of trade.(T)7.Auto production is one of the important sectors in American manufacturing industry.(T)8.The world economy has little to do with the growth and decline of the American foreigntrade.(F)Chapter 12cation is governed by state and local governments instead of the national government in America.(T)2.All American children are offered 12 years of compulsory public education.(T)3. After 12 years of schooling, American students receive a bachelor's degree at graduation.(F)4.When selecting a college or university, undergraduate students have a great concern forits size, location and academic quality.(T)ually, an undergraduate student has to earn 120 credits to receive a degree.(T)6.Yale university is the second eldest institution of higher learning in the United States.(F)7.It is The New York Times that first uncovered the Watergate Scandal in 1972 through theefforts of two reporters.(F)8.Thanksgiving Day falls on the fourth Tuesday in November.(F)选择题Chapter 1 ABDC DACC1.The two main islands of the British Isles are .A. Great Britain and IrelandB. Great Britain and ScotlandC. Great Britain and WalesD. Great Britain and England2.is the capital city of Scotland.A. BelfastB. EdinburghC. AberdeenD. Cardiff3.Among the four parts of the United Kingdom, is the smallest.A. EnglandB. ScotlandC. WalesD. Northern Ireland4.English belongs to the group of Indo-European family of languages.A. CelticB. Indo-IranianC. GermanicD. Roman5.The introduction of Christianity to Britain added the first element of words to English.A. Danish and FinnishB. Dutch and GermanC. French and ItalianD. Latin and Greek6.The evolution of Middle English was reinforced by the influence.A. NormanB. DutchC. GermanD. Danish7.Samuel Johnson’s dictionary was influential in establishing a standard form of .A. grammarB. handwritingC. spellingD. pronunciation8.At present, nearly of the world’s population communicate in English.A. halfB. a quarterC. one thirdD. one fifthChapter 2 DDCC ABAC1. The attack on Rome ended the Roman occupation in Britain in 410.A. NormanB. DanishC. CelticD. Germanic2.By the late 7th century, became the dominant religion in England.A. Celtic ChristianityB. Anglo-Saxon ChristianityC. Germanic ChristianityD. Roman Christianity3.The marked the establishment of feudalism in England.A. Viking invasionB. signing of the Magna CartaC. Norman ConquestD. Adoption of common law4.The end of the Wars of the Roses led to the rule of .A. the House of ValoisB. the House of YorkC. the House of TudorD. the House of Lancaster5.The direct cause for the Religious Reformation was King Henry VIII’s effort to .A. divorce his wifeB. break with RomeC. support the ProtestantsD. declare his supreme power over the church6.The English Civil War broke out in 1642 between .A. Protestants and PuritansB. Royalists and ParliamentariansC. nobles and peasantsD. aristocrats and Christians7.was passed after the Glorious Revolution.A. Bill of RightsB. Act of SupremacyC. Provisions of OxfordD. Magna Carta8.The Industrial Revolution was accomplished in Britain by the middle of the century.A. 17thB. 18thC. 19thD. 20thChapter 3 CDBA BBDC1. The British government is characterized by a division of powers between three of the followingbranches with the exception of the .A. judiciaryB. legislatureC. monarchyD. executive2.The importance of the British monarchy can be seen in its effect on .A. passing the billsB. advising the governmentC. political partiesD. public attitude3.As a revising chamber, the House of Lords is expected to the House of Commons.A. rivalB. complementC. criticizeD. inspect4.is at the center of the British political system.A. The CabinetB. The House of LordsC. The House of CommonsD. The Privy Council5.The main duty of the British Privy Council is to .A. make decisionsB. give adviceC. pass billsD. supervise the Cabinet6.Generally speaking, the British Parliament operates on a system.A. single-partyB. two-partyC. three-partyD. multi-party7.The policies of the Conservative Party are characterized by pragmatism and .A. government interventionB. nationalization of enterprisesC. social reformD. a belief in individualism8.In Britain, the parliamentary general election is held every years.A. threeB. fourC. fiveD. sixChapter 4 ACDC DBAC1. The in the early 1970s worsened an already stagnant economy in Britain.A. oil crisisB. high inflation ratesC. large importsD. unemployment problem2.Of the following practices, does not belong to Thatcher’s social welfare reform.A. reducing child benefitsB. shortening the unemployment benefits periodC. reducing the unemploymentD. lowering old age pensions3.The Blair government has been successful in all the following aspects except .A. limiting government spendingB. keeping inflation under controlC. reducing unemploymentD. reducing inequality4.Britain has devoted of its land area to agriculture.A. 54%B. 64%C. 74%D.84%5.Britain’s important fishing areas include all the following except .A. the North SeaB. the English ChannelC. The sea area around IrelandD. The sea area between Britain and Ireland6.Coal mining industry in Britain provides of the energy consumed in the country.A. 1/3B. 1/4C. 1/5D. 2/37.The car industry in Britain in mostly .A. foreign-ownedB. state-ownedC. joint-ventureD. privately-owned8.Of the following sectors in Britain, has experienced spectacular growth since the end ofWord War II.A. agricultureB. energy industryC. service industryD. manufacturing industry Chapter 5 DCBB CCDA1. In Britain, the division between grammar schools and vocational schools were ended by theintroduction of comprehensive schools in the .A. 1930sB. 1940sC. 1950sD. 1960s2.About of British children receive primary and secondary education through theindependent system.A. 5%B. 6%C. 7%D. 8%3.Partially funded by central government grants, the British universities receive their remaining fundsfrom all the following sources except .A. tuition feesB. loansC. donationsD. corporate contributions4.To be admitted to the Open University, one need .A. some educational qualificationsB. no educational qualificationsC. General Certificate of Education-AdvancedD. General National Vocational Qualifications5.Among Britain’s quality press, the following newspapers are regarded as the “Big Three” with theexception of .A. The TimesB. The GuardianC. The ObserverD. The Daily Telegraph6.Life on Earth is a kind of program produced by the BBC and is popular among 500 millionviewers worldwide.A. featureB. dramaC. documentaryD. soap opera7.is Britain’s top pay television provider.A. BSBB. SkyTVC. BBCD. BSkyB8.The following Christmas traditions are particularly British except .A. Trooping the ColorB. Queen’s Christmas messageC. Boxing DayD. Christmas pantomimeChapter 8 BCAB CDAD1. The U. S. lies in North America, with Canada to the north, Mexico to the south, the Atlanticto its and the Pacific to its .A. northern, east, westB. central, east, westC. southern, west, eastD. western, east, west2. The continental United States has statesA. 50B. 49C. 48D. 353.The state of is the largest in area of all the states.A. AlaskaB. HawaiiC. TexasD. Florida4.The largest river in the U. S. is .A. the Missouri RiverB. the Mississippi RiverC. the Ohio RiverD. the Colorado River5.Some of the world famous universities like Harvard, Yale and MIT are located in .A. the SouthB. the WestC. New EnglandD. the Midwest6.San Francisco, Los Angeles and San Diego all belong to .A. MontanaB. UtahC. MaineD.California7.The Immigrants Act of 1924 restricted the further immigration into the United States, particularlyfrom .A. EuropeB. AsiaC. AfricaD. South America8.The characteristic of the dominant American culture is .A. English-speaking, northern European, Roman Catholic and middle-classB. English-speaking, western European, Roman Catholic and upper-classC. English-speaking, northern European, Protestant and upper-classD. English-speaking, western European, Protestant and middle-classChapter 9 CCDB CACD1. The first successful English colony in North America was founded at in .A. Jamestown, LouisianaB. Boston, MassachusettsC. Jamestown, VirginiaD. Plymouth, Georgia2.The Seven Years’ War occurred between the .A. French and American IndiansB. French and SpaniardsC. French and BritishD. British and American Indians3.“No taxation without representation” was the rallying slogan of .A. the settlers of VirginiaB. the people of PennsylvaniaC. the colonists in New EnglandD. the people of the 13 colonies4.In May 1775, was held in Philadelphia and began to assume the functions of a nationalgovernment.A. the First Continental CongressB. the Second Continental CongressC. the Boston Tea PartyD. the Congress of Confederation5.Abraham Lincoln issued to grant freedom to all slaves.A. Declaration of IndependenceB. ConstitutionC. Emancipation ProclamationD. Bill of Rights6.The policy of the United States was at the beginning of the two world wars.A. neutralityB. full involvementC. partial involvementD. appeasement7.President applied New Deal to deal with the problems of the Great Depression.A. WilsonB. TrumanC. RooseveltD. Kennedy8.The Vietnam War was a long-time suffering for Americans, and it continued throughout the terms ofPresidents .A. Johnson, Nixon and FordB. Truman, Eisenhower and KennedyC. Kennedy, Johnson and NixonD. Eisenhower, Kennedy and JohnsonChapter 10 BCBD CCDC1. The U. S. Constitution came into effect in .A. 1787B. 1789C. 1791D. 17932.The Constitution of the United States .A. gives the most power to CongressB. gives the most power to the PresidentC. tries to give each branch enough power to balance the othersD. gives the most power to the Supreme Court3.The Bill of Rights .A. defines the rights of Congress and the rights of the PresidentB. guarantees citizens of the United States specific individual rights and freedomsC. is part of the Declaration of IndependenceD. has no relationship with the Constitution4.The terms for a Senator and Representative are and years respectively.A. two, fourB. two, threeC. two, sixD. six, two5.All the following except cannot make legislative proposal.A. the SenatorB. the RepresentativeC. the Secretary of StateD. the President6.The following except are all powers of the President.A. vetoing any bills passed by CongressB. appointing federal judges when vacancies occurC. making lawsD. issuing executive orders7.The Supreme Court is composed of justices.A. sixB. sevenC. eightD. nine8.The President is directly voted into office by .A. all citizens of AmericaB. the citizens over 18 years oldC. electors elected by the votersD. the senators and representativesChapter 11 BCBD CCDC1. America produces a major portion of the world’s products in the following fields except .A. machineryB. automobilesC. oreD. chemicals2.The modern American economy progressed from to , and eventually, to .A. colonial economy, handcraft economy, industrial economyB. farming economy, handcraft economy, industrial economyC. colonial economy, farming economy, industrial economyD. handcraft economy, farming economy, industrial economy3.Chartered companies were NOT granted the by the British King or Queen.A. political authorityB. economic rightsC. judicial authorityD. diplomatic authority4.urged the federal government to establish a national bank.A. George WashingtonB. President RooseveltC. Abraham LincolnD. Alexander Hamilton5.The following in ventions took place during the “second industrial revolution” except .A. typewriterB. telephoneC. electric lightD. refrigerator6.President Johnson tried to build a “Great Society” by introducing various programs like the followingexcept .A. MedicareB. Food StampsC. Education InitiativesD. Unemployment Pension7.The following statements are all true except .A. Agribusinesses reflect the big, corporate nature of many farm enterprises.B. Agribusinesses maintain a balanced trade pattern between agricultural imports and exports.C. Agribusinesses range from one-family corporations to multinational firms.D. Agribusinesses include a variety of farm businesses and structures.8. Employment in the sector has been increasing in the U.S. since the 1970s.A. serviceB. agricultureC. manufacturingD. high-tectChapter 12 CBBB CBBB1. Formal education in the United States consists of , secondary and higher education.A. kindergartenB. publicC. elementaryD. private2.Of the following subjects, are NOT offered to elementary school students.A. mathematics and languagesB. politics and business educationC. science and social studiesD. music and physical education3.Higher education in the United States began with the founding of .A. Yale UniversityB. Harvard UniversityC. Princeton UniversityD. New York University4.Of the following, are NOT among the categories of American higher education.A. universities and collegesB. research institutionsC. technical institutionsD. community colleges5.To get a bachelor’s degree, all undergraduate students are required to do the followingexcept .A. attending lectures and completing assignmentsB. passing examinationsC. working for communitiesD. earning a certain number of credits6.is sold especially to the upper or upper-middle class and it has a reputation for its seriousattitude and great bulk.A. The Washington PostB. The New York TimesC. Los Angeles TimesD. New York Daily News7.Of the following, is NOT among the three major radio and TV networks in America.A. the National Broadcasting System (NBS)B. the Public Broadcasting Service (PBS)C. the Columbia Broadcasting System (CBS)D. the American Broadcasting System (ABS)8.The National Day of the United States falls on .A. June 4thB. July 4thC. June 14thD. July 14th第三大题Chapter 11.Why do tourists from all over the world like to go to Scotland?√They like to enjoy the beautiful Scottish scenery, to drink Scotch whisky and to see Scotsmen wearing kilts and playing bagpipes.2.How many periods can the development of the English language be divided into and what are they?√√----The development of the English language can be divided into three periods: Old English, Middle English and Modern English.3. Why did English become more important after Black Death?----The laboring and merchant classes grew in economic and social importance after the Black Death, so English also grew in importance compared to French.Chapter 21.What were Queen Victoria’s major achievements?Queen Victoria made tremendous achievements in almost every aspect. She promoted further industrialization, the building of railways and the growth of trade and commerce. During her reign, Britain developed into an empire including about a quarter of the global population and a quarter of the world’s landmass.2.What were the two camps in World WarⅠ?√In WorldⅠthe two camps were the Central Powers-mainly Germany, Austria-Hungary, Turkey and the Allies-mainly France, Great Britain, Russia, Italy and from 1917,the United States.3.Why did Britain cooperate closely with the United States after World WarⅡ?Britain cooperated closely with the United States after World WarⅡsince they were allied during World WarⅡand shared the same concerns about the Soviet Union.Chapter 51.What used to be the major functions of grammar schools and vocational schools inBritain?Grammar schools were to train the most academically capable students and prepare them for university, whereas vocational schools were to help the less successful students to learn a trade.2.What kind of subjects do British comprehensive schools provide?British comprehensive schools provide a general education, offering both academic subjects like literature and science, and more practical subjects like cooking andcarpentry.3.In what ways do British universities enjoy complete academic freedom?British universities enjoy complete academic freedom because they can appoint their own staff, decide which students to admit, provide their own courses and award their own degrees.4.What role does the media play in British leisure culture?The media plays an essential role in Britain leisure culture since it helps to shape the public’s opinion, determine people’s moral and political orientation and consolidate or undermine the rule of a government.Chapter 81.How is the American population distributed?The distribution of the American population is rather uneven the most densely populated region is the northeastern part of the country. The great plains have a comparatively small population .the so uth also has a population of almost 57.5million. the west is not densely populated ,except for some metropolitan centers like los Angeles and san Francisco . it has about 20% of the nation’s population.2.Why was the immigration act of 1942 instituted ?The new immigrants in the united states , being poor and accustomed to poverty , were willing to w ork for very low wages .this made other workers afraid that the immigrants would ls and take jobs aw ay from them . this opposition led to the immigration act of 1942.Chapter 91.Why did American change its policy and enter world war II? √√Because of the formation of the axis , the American government feared that the axis countries were wining the war and it might threaten America’s security and interests . it began to provide war equip ment to the foreign nations resisting the aggression of the axis power . the Japanese air raid on pearl harbor became the direct cause for America’s entrance into the war.2.What were Nixon’s well-known contributions during his presidency?a) brought the Vietnam war to a closeb)reestablishing U.S. relations with chinac) negotiating the firststrategic arms limitation treaty with the former soviet union .3.What were the contents of Reagan’s economic program?Reagan’s economic program called for reductions in income taxes and business taxes in order to e ncourage investment , and it also requested that many government regulations be eliminated so as t o reduce the federal government’s role in the day-to-day operation of business.Chapter 101.What are the two characteristics of the U.S. constitution?One is “checks and balances”, the other is that the power of the federal government and of the state governments are specified in the Constitution.2.What are the qualifications for a senator and a representative respectively?A senator must be over 30 years old,a U.S. citizen for at least nine years, and a resident in the state which they represent . A representative should be at least 25 years old anda U.S. citizen for no less than seven years.3.What are the major powers of the Supreme Court in the USA？√√a)to interpret lawsb) to hear appeals from any federal court cases;c)to hear appeals from state court cases that involve the constitution or national lawsd)may declare a law unconstitutionale) may declare a presidential act unconstitutional.4.What is the difference between the democrats and the republicans in terms of politicalopinions?Generally speaking, the Democrats Party has a liberal ideology, while the Republicans Party is more conservative.The democrats want the government to play an important role in the economy and emp hasize full employment as a matter of national concern they favor civil rights laws , a str ong social security system which gives enterprises a greater freedom and demand that t he government control inflation. They stress the need for law and order, and oppose co mplete government social programs and free choice of abortion they also favor a strong military posture and assertive stand in international relations.Chapter 111.What industry developments took place during the colonial period of America?During the colonial period ,the secondary industries developed as the colonies grew .a variety of specialized sawmills and gristmills appeared. Colonists established shipyardsto build fishing fleets and trading vessels . they also built small iron forges . by the 18th century , regional patterns of development in America had become clear.2.How did the civil war affect the American economy? √√After the civil war , the large southern cotton plantations became much less profitable . northern industries , which had expanded rapidly because of the demands of the war ,s urged ahead.3.Why does America try to reduce trade barriers?Because the united states has increasingly realized that open bilateral trade will not onl y advance its own economic interests, but also enhance domestic stability and its peaceful relationship with other nations.Chapter 121.How does an American university choose its applicants?a)their high school records;b) recommendations from their high school teachers;c) the impression they make during interviews at the university;d) their scores on the SAT.2.What functions do American higher education institutions perform?。
尔雅课创新、发明与专利实务（）（全部官方正确答案）
尔雅课创新、发明与专利实务（）（全部官方正确答案）尔雅课创新、发明与专利实务()(全部官方正确答案)一、单选题1商标的实施许可是指商标所属企业对另外一个企业赋予。
A、材料采购权B、质量监督权C、设计权D、生产权正确答案：D 2用航拍照片代替实物或者实物系统的原理称为A、替代B、分离C、嵌套D、复制正确答案： D 3跑步机的发明是用了原理。
A、分离原理B、抽取原理C、反向作用D、嵌套正确答案：C 4呼吸机的工作是运用了原理。
A、持续性原理B、循环性原理C、周期性原理D、动态特性原理正确答案：C 5选择创新创业课题时需要注意的是。
A、突出自己的特色B、建立一定的壁垒C、利用好现有资源D、以上都是正确答案：D 6通过某个专利的优先权可以了解到的信息不包括。
A、该专利在某一地区有无市场需求B、该专利是否重要C、找到其它语种的申请文献D、该专利授权的时间正确答案：D 7以下不是反馈原理在实际中的应用的是。
A、核电站B、儿童安全椅C、音乐喷泉D、自动导航系统正确答案：B 8根据报告数据，美国前500家高增长创业公司的创始人中，获得学士学位的比例是。
A、50%以上B、70%以上C、80%以上D、95%以上正确答案：D 9在《魔鬼经济学》中，黑帮作为一个职业是。
A、高风险高收益B、高风险低收益C、低风险高收益D、低风险低收益正确答案： B 10如果没有发明专利去创业的话需要建立一个为主的团队。
A、产品研发B、营销或策划C、客服D、融资正确答案： B 11我国提出建设创新型国家是在。
A、2004年B、2005年C、2006年D、2007年正确答案：C 12发明的专利权的有效期限如何计算？A、授权日起20年内B、授权日起10年内C、申请日起20年内D、申请日起10年内正确答案：C 13下列不属于解决物理矛盾的方法的是。
A、空间分离B、时间分离C、条件分离D、条块分离正确答案：D 14根据报告，美国的创业者创业年龄主要集中在。
马克思全部课后答案
第二章1、蚂蚁能看见我们看不见的光线，但我们能证明蚂蚁看见而我们看不见的东西，且这种证明只能以人眼睛所造成的知觉为基础，这说明人眼的特殊构造不是人的认识的绝对界限。
据此说明实践对认识的决定作用。
（56）答:1、任何动物只能依靠本能去接触外部世界，而人类却可以通过实践了解并根据自身的需要去能动地改造世界。
2、蚂蚁能看见人类所看不见的光线，这是蚂蚁所具有的本能。
从人类的本能来看，眼睛所能看到的东西虽然有限，甚至连蚂蚁也不如；但人类可以在改造世界的科学活动中，创造出世界上本来并不存在的太空探测仪、高能加速器、显微镜等科学仪器，大大地拓展人类的视野，看到人的视力所看不到的极远或极其微小的东西。
3、以上事实证明了人眼的特殊构造不是人的认识的绝对界限，人类对客观物质世界的认识，其主要来源不是人类的自然本能，而是人类的实践。
2、互联网既可用来传播先进文化与观念，也可用来散布文化垃圾。
运用实践和认识相互关系的原理，分析互联网对人们思想观念发生了哪些影响？当代大学生对互联网的发展应树立怎样的价值观？答：1、实践在人的认识的形成中具有决定作用。
实践产生了认识的需要，为认识提供了可能，使认识得以产生和发展。
2、互联网作为一种现代化的传播工具，打破了地域、民族、国别等界限，大大缩短了人们之间相互交往联系的距离。
它的出现，对大学生产生了极大的吸引力，也为大学生通过上网实践、发展自己的思想认识提供了可能。
3、互联网作为一项现实的新的科学技术成果，既可用来传播先进的文化与观念，也可用来散布文化垃圾。
依据认识源于实践的原理，当代大学生在实践中经常接触互联网中先进的文化与观念，能激发自己积极向上的精神，汲取有用的科学文化知识，培养科学人文精神；如果经常性接触其中的文化垃圾，则会对自己的思想上的健康成长带来若干不良影响。
4、因此，当代大学生对待互联网的发展，不能仅凭个人兴趣，受互联网中负面因素的影响，而应该把个人的价值追求同汲取科学知识、积极精神和艺术熏陶等先进的文化与观念结合起来，实现个人价值以坚持真理标准为前提，坚持真理与价值的辩证统一观，充分利用互联网的积极作用而避开其负面影响，通过互联网，进一步提高自身的科学人文素质。
(完整word版)《健康素养66条》知识竞赛全部题目及答案
《健康素养66条》知识竞赛全部题目答案1. 为及时发现人体健康隐患，排除疾病诱因，成年人应至少多久做一次体检（）A 、半年 B、1年 C、2年 D、3年标准答案B2. 以下哪项是预防传染病最有效、最经济的措施 ( )A、接种疫苗B、在有疾病流行的时候吃一些预防性药品C、吃一些保健品D、增强锻炼提高自己的身体素质。
标准答案A3. 健康的涵义包括哪几个方面（）A、体格健壮、心理状态、个人与环境B、身体健康、心理健康、社会适应良好C、身体健康、心理状态、个人与环境D、体格健壮、心理状态、社会适应良好标准答案B4、每个人都有获得可达到最高标准的身体健康和心理健康的权利，这要求我们应该做到什么（）A、努力维护自身的健康权利B、尊重他人的健康权利C、承担起个人对于自身健康和他人健康的责任标准答案D5、健康生活方式主要包括哪四个方面（）A合理膳食B适量运动C戒烟限酒D心理平衡E以上都是。
标准答案E6、《中华人民共和国献血法》规定，自愿献血的对象为（）的健康成年人，每次采集的血液量一般为（）毫升，两次采集间隔期不少于（）个月。
A、十八周岁至五十五周岁，200~400，6B、十八周岁至五十五周岁，200~300，6C、十六周岁至五十五周岁，200~400，6D、十八周岁至六十周岁，200~400，6标准答案A7、预防艾滋病的责任应该在于（）A、国家B、医院C、疾控中心D、全社会标准答案D8. 健康人如何合理安排一日三餐（）A、定时定量，早饭吃好，午饭吃饱，晚饭吃少B、不暴饮暴食，不经常在外就餐，零食作为一日三餐意外的营养补充，可以合理选用C、要少吃油脂高，过甜，过咸的食物标准答案D9.关于自测血压的说法，错误的是（）A、自测血压对高血压诊断有参考价值B、高血压患者定期自测血压，可为医生制定治疗方案和评价治疗效果提供依据C、高血压患者只要自测血压稳定，就可以不用定期到门诊进行随访治疗D、间隔多久测一次血压需要根据病情来定标准答案C10.关于乙肝疫苗，下面说法中哪种是正确的（）A、乙肝疫苗只要接种一针就有足够的免疫力B、乙肝疫苗的接种对象仅限于婴幼儿C、接种乙肝疫苗可以预防甲肝和乙肝D、健康的新生儿应在24小时之内接种第一针乙肝疫苗标准答案D11.在流感流行季节来临时，以下哪种方式可以预防流感（）A、少去人群密集场所B、接种流感疫苗C、勤洗手D、以上都是。
抽样技术_第三版_全部课后答案
第二章习题判断下列抽样方法是否是等概的：（1）总体编号1~64，在0~99中产生随机数r ，若r=0或r>64则舍弃重抽。
（2）总体编号1~64，在0~99中产生随机数r ，r 处以64的余数作为抽中的数，若余数为0则抽中64.（3）总体20000~21000，从1~1000中产生随机数r 。
然后用r+19999作为被抽选的数。
解析：等概抽样属于概率抽样，概率抽样具有一些几个特点：第一，按照一定的概率以随机原则抽取样本。
第二，每个单元被抽中的概率是已知的，或者是可以计算的。
第三，当用样本对总体目标进行估计时，要考虑到该样本被抽中的概率。
因此（1）中只有1~64是可能被抽中的，故不是等概的。
（2）不是等概的【原因】（3）是等概的。
抽样理论和数理统计中关于样本均值y 的定义和性质有哪些不同？为了合理调配电力资源，某市欲了解50000户居民的日用电量，从中简单随机抽取了300户进行，现得到其日用电平均值=y （千瓦时），=2s 206.试估计该市居民用电量的95%置信区间。
如果希望相对误差限不超过10%，则样本量至少应为多少？解：由已知可得，N=50000，n=300，5.9y =，2062=s1706366666206*300500003001500001)()ˆ(222=-=-==s nf N y N v YV 19.413081706366666(==）y v 该市居民用电量的95%置信区间为[])(y [2y V z N α±=[475000±*]即为（，） 由相对误差公式y)(v u 2y α≤10%可得%10*5.9206*n50000n 1*96.1≤- 即n ≥862欲使相对误差限不超过10%，则样本量至少应为862某大学10000名本科生，现欲估计爱暑假期间参加了各类英语培训的学生所占的比例。
随机抽取了两百名学生进行调查，得到P=，是估计该大学所有本科生中暑假参加培训班的比例的95%置信区间。
计量经济学(庞浩)第二版课后习题答案(全)
计量经济学全部答案（庞浩）第二版第二章练习题及参考解答2.1 为研究中国的货币供应量(以货币与准货币M2表示)与国内生产总值(GDP)的相互依存关系，分析表中1990年—2007年中国货币供应量（M2）和国内生产总值（GDP ）的有关数据:表2.9 1990年—2007年中国货币供应量和国内生产总值(单位:亿元)资料来源:中国统计年鉴2008,中国统计出版社对货币供应量与国内生产总值作相关分析，并说明相关分析结果的经济意义。
练习题2.1 参考解答:计算中国货币供应量(以货币与准货币M2表示)与国内生产总值(GDP)的相关系数为:计算方法: XY n X Y X Y r -=或 ,()()X Y X X Y Y r --=计算结果:M2GDPM210.996426148646GDP 0.996426148646 1经济意义: 这说明中国货币供应量与国内生产总值(GDP)的线性相关系数为0.996426,线性相关程度相当高。
2.2 为研究美国软饮料公司的广告费用X与销售数量Y的关系,分析七种主要品牌软饮料公司的有关数据表2.10 美国软饮料公司广告费用与销售数量品牌名称广告费用X(百万美元) 销售数量Y(百万箱) Coca-Cola Classic 131.3 1929.2Pepsi-Cola 92.4 1384.6Diet-Coke 60.4 811.4Sprite 55.7 541.5Dr.Pepper 40.2 546.9Moutain Dew 29.0 535.67-Up 11.6 219.5 资料来源:(美) Anderson D R等. 商务与经济统计.机械工业出版社.1998. 405绘制美国软饮料公司广告费用与销售数量的相关图, 并计算相关系数，分析其相关程度。
能否在此基础上建立回归模型作回归分析？练习题2.2参考解答美国软饮料公司的广告费用X与销售数量Y的散点图为说明美国软饮料公司的广告费用X与销售数量Y正线性相关。
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第一章选择答案：CCDAB BDCBC BBDBB CCB
第二章选择答案：ACDBA ABDDA （11题：ABC ）B 第三章选择答案：CBADA BADBA CABAD ACABBA 第四章选择答案：单选
ACBBD DBADD BDABC BBDDC BDADC 多选
1、ADE
2、BCDE
3、BDE
4、BCD
5、ADE
6、ACE
7、BCDE
8、ABE
9、ABD 10、DE 11、ABCDE 12、CD 13、BD 14、AD 15、CDE 16、ABC 17、AE 18、BCDE 19、BE 20、BCD 21、ABCD 22、AB
第八章答案：一、ABCBA DAABA CCBAA AB
二、1、建立原假设和备择假设为：H 0：X ≥100，H 1：X ＜100； 拒绝规则为：如n
x z /σμ
-=
＜-01.0z （=-2.33），则拒绝H 0；
检验统计量z=0.39
/
2510075-=-＜-2.33，拒绝原假设，认为该厂机器的平均开工成本有所
下降。
2、建立原假设和备择假设为：H 0：X =0.618，H 1：X ≠0.618； 拒绝法则为：如n
s x t /
0μ-=＞005.0t (20-1)(=2.861)或n
s x t /
0μ-=
＜-005.0t （20-1）（=-2.861），
则拒绝原假设；
93.120
/
09327.0618.0658.0/
0=-=
-=
n s x t μ，所以，不能拒绝原假设，也就是没有充分理由怀疑该
厂生产的工艺品框架宽与长的平均比例不是0.618。
3、建立原假设和备择假设为：H 0：P ≤0.25，H 1：P ＞0.25；
39.1400
)
25.01(25.025
.0400
112
)
1(000=--=
--=
n
p p p p z ＜01.0z =(2.33),不能拒绝原假设，
因此没有充分理由认为这部电视剧是成功的。
第九章答案 一、单选题
1-5ABCAD6-10BCBCD11-15BACDB16-20ADCAD21-25CBAAB26-30CDABC31-32BC 二、计算题
1、2004年该市平均人口数为：
(a 1+a 2)/2×f 1 +…+(a n-1+a n )/2×f n-1 (215+213.5)/2×5+(213.5+213.6)/2×2+ (213.6+215)/2×5
a= =
f1+ f2+… f n-1 5+2+5
=214.15万人
a'/a=3341/4044×100%=82.62%
（2）第二季度非工人比重：
a'’/a=670/4084×100%=16.41%
（3）上半年工人比重：
a'/a=3378/4064×100%=83.12%
3、利用首尾折半法公式计算：
（1）各季度流动资金平均余额：第一季度
520/2+480+440+360/2
a= =453.3万元；
4-1
第二季度：333.3万元；第三季度：370.0万元；第四季度：484.3万元
（2）全年流动资金平均余额： a=(453.3+333.3+370.0+484.3)/4=410万元
4、某种原材料年平均库存额：
(a1+a2)/2×f1 +…+(a n-1+a n)/2×f n-1 (5.2+3.6)/2×3+(3.6+3.0)/2×2+ (3.0+4.2)/2×4+(4.2+5.6)/2×3 a= =
f1+ f2+… f n-1 3+2+4+3
=4.1万公斤
5、（1）编制第一季度各月劳动生产率的动态数列
（2）计算第一季度的月平均劳动生产率
注：劳动生产率是一个相对指标
劳动生产率=产值/人数
再分别计算分母数列和分子数列的序时平均数：（4000+4200+4500）/3=4233.3
（62+66+67.5）/3=65.167
上面两式相除：4233.33/65.167=64.96
（3）计算第一季度的劳动生产率
用第一季度的总产值除以第一季度的平均人数即可：（4000+4200+4500）/65.17=194.88（百元/人）
6、
（4）1997-2003年的年平均发展速度为：x=n√R = 6√1.954 =111.8%
(5)按111.8%的速度发展，产量较2003年增加一倍数需：
n=lgR/lg x =lg2/lg1.118= 6.3年
（6）按2003年比2002年的发展速度123.3%，实现产量较2003年翻一番，需n=lgR/lg x =lg2/lg1.233= 3.4年即2007年比2003年提高一倍。
第十章答案
一、单选题
1-5BCDBC6-10ADABC11-15DBADC16-17AB
二、计算
产量综合指数：
K Q=∑Q1P0/∑Q0P0=2880/2472=116.50%
出厂价格综合指数：
K P=∑Q1P1/∑Q1P0=3490/2880=121.18%。