大学英语四级

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大学英语四级大学英语六级大学英语三级专四专八成人英语三级商务英语雅思 GRE

Drections:Questions16to18arebasedonthepassageyouhavejustheard. 答案解析
患者，车祸致头部外伤后即出现意识障碍，持续16小时后出现烦躁不安，并有神经系统阳性体征，体温达39℃，血压180／100mmHg(C23．94／13．3kPa)。答案解析
期货市场的风险分为可控风险和不可控风险，其中可控风险包括()。答案解析
导致均衡数量减少的情形有（　　）。答案解析
（　　）属于反向市场。答案解析
我国银行间外汇市场询价交易的特点是（　　）。答案解析
（　　）是指对整个股票市场产生影响的风险。答案解析
Part II Listening Comprehension （25 minutes）Section ADirections: In this section, you will hear three news reports. At the end of each news report, you will hear two or three questions. Both the news report and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A), B), C) and D). Then mark the corresponding letter on Answer Sheet 1 with a single line through the centre.Questions 1 and 2 are based on the news report you have just heard.Your browser does not support the audio element. 答案解析
Part Ⅱ Listening Comprehension (25 minutes)Section ADirections: In this section, you will hear three news reports. At the end of each news report, you will hear two or three questions. Both the news report and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A), B), C) and D) .Then mark the corresponding letter on Answer Sheet 1 with a single line through the centre.Questions 1 and 2 are based on the news report you have just heard.Your browser does not support the audio element. 答案解析
Section BDirections:In this section, you will hear two long conversations. At the end of each conversation, you will hear four questions. Both the conversation and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A), B), C) and D). Then mark the corresponding letter on Answer sheet 1 with a single line through the centre.Questions 8 to 11 are based on the conversation you have just heard. 答案解析
Once you're prepared for a situation, you're 50 percent of the way toward overcoming nervousness. The other 50 percent is the physical and mental control of nervousness; adjusting your attitude so you have confidence, andcontrol of yourself and your audience. I was in the theater for many years and always went to work with terrible stage fright--until I was in The Kingand I. While waiting offstage one night, I saw YulBrynner, the show's star, pushing in a lunging( 冲. position,against a wall.It looked as though he wanted to knock it down. "This helps me control my nervousness,”he explained. I tried it and, sure enough, freed myself from stage fright. Not only that, but pushing the wall seemed to giveme a whole new kind of physical energy. Later I discovered that when you push against a wall you contract themuscles that lie just below where your ribs(肋骨. begin to splay(开展.. I call this area the vital mangle. To understand how these muscles work, try this: sit in a straight-backed chair and lean slightly forward. Putyour palms together in front of you, your elbows pointing out the sides, your fingertips pointing upward, and pushso that you feel pressure in the heels of your palms and under your arms. Say ssssssss, like a hiss(嘶嘶声) As you're exhaling(轻轻发出) the s, contract those muscles in the vitaltriangle as though you were rowing a boat, pulling the oars(船桨. back and up. The vital triangle should tighten.Relax the muscles at the end of your exhalation, then inhale gently.You can also adjust your attitude to prevent nervousness. What you say to yourself sends a message to youraudience. If you tell yourself you're afraid, that's the message your listener receives. So select the attitude youwant to communicate. Attitude adjusting is your mental suit of armor(铠甲. against nervousness. If you entertainonly positive thoughts, you will be giving out these words: joy and ease, enthusiasm, sincerity and concern, andauthority. 答案解析
A useful definition of an air pollutant is a compound added directly or indirectly by humans to the atmospherein such quantities as to affect humans, animals, vegetation, or material adversely(有害地.. Air pollution requires avery flexible definition that permits continuous change. When the first air pollution laws were established inEngland in the fourteenth century, air pollutants were limited to compounds that could be seen or smelled--a farcry(悬殊的差别.from the extensive list of harmful substances known today. As technology has developed andknowledge of the health aspects of various chemicals has increased, the list of air pollutants has lengthened. In thefuture, even water vapor(水蒸气.might be considered an air pollutant under certain conditions. Many of the more important air pollutants, such as sulfur oxides, carbon monoxide, and nitrogen oxides, arefound in nature. As the Earth developed, the concentrations (浓度.of these pollutants were altered by variouschemical reactions; they became components in biogeochemical( 生物地球化学.cycles. These serve as an airpurification scheme by allowing the compounds to move from the air to the water or soil. On a global basis,nature's output of these compounds dwarfs that resulting from human activities. However, human productionusually occurs in a localized area, such as a city. In this localized region, human output may be dominant and may temporarily overload the natural purificationscheme of the cycles. The result is an increased concentration of noxious( 有害的.chemicals in the air. Theconcentrations at which the adverse effects appear will be greater than the concentrations that the pollutants wouldhave in the absence of human activities. The actual concentration need not be large for a substance to be apollutant; in fact the numerical value tells us little until we know how much of an increase this represents over theconcentration that would occur naturally in the area. For example, sulfur dioxide has detectable health effects at0.08 parts per million(ppm., which is about 400 times its natural level. Carbon monoxide, however, has a naturallevel of 0.1 ppm and is not usually a pollutant until its level reaches about 15 ppm. 答案解析
Coincident with concerns about the accelerating loss of species and habitats has been a growing appreciationof the importance of biological diversity, the number of species in a particular ecosystem( 生态系统., to the healthof the Earth and human well-being. Much has been written about the diversity of terrestrial organisms ( 陆生生物., particularly the exceptionally rich life associated with tropical rain-forest habitats. Relatively little has beensaid, however, about diversity of life in the sea even though coral reef.systems are comparable to rain forests interms of richness of life. An alien exploring Earth would probably give priority to the planet's dominant, most distinctive feature-theocean. Humans have a bias toward land that sometimes gets in the way of truly examining global issues. Seen fromfar away, it is easy to realize that land masses occupy only one-third of the Earth's surface. Given that two-thirds ofthe Earth's surface is water and that marine life lives at all levels of the ocean, the total three-dimensional livingspace of the ocean is perhaps 100 times greater than that of land and contains more than 90 percent of all life onEarth even though the ocean has fewer distinct species. The fact that half of the known species are thought to inhabit the world's rain forests does not seem surprising,considering the huge numbers of insects that comprise the bulk of the species. One scientist found many differentspecies of ants in just one tree from a rain forest. While every species is different from every other species, thegenetic makeup constrains them to be insects and to share similar characteristics with 750,000 species of insects. Ifbasic, broad categories such as phyla( 门. and classes( 纲. are given more emphasis than differentiating betweenspecies, then the greatest diversity of life is unquestionably in the sea. Nearly every major type of plant and animalhas some representation there. To appreciate fully the diversity and abundance of life in the sea, it helps to think small. Every spoonful ofocean water contains life, on the order of 100 to 100,000 bacterial cells plus assorted microscopic (极小的. plantsand animals, including larvae( 幼虫. of organisms ranging from sponges and corals to starfish and clams( 蛤蜊.and much more. 答案解析
Is it possible to persuade mankind to live without war? War is an ancient institution which has existed for atleast six thousand years. It was always bad and usually foolish, but in the past the human race managed to live withit. Modem ingenuity( 创造力.has changed this. Either Man will abolish war, or war will abolish Man. For thepresent, it is nuclear weapons that cause the most serious danger, but bacteriological or chemical weapons, maybefore long, offer an even greater threat. If we succeed in abolishing nuclear weapons, our work will not be done. Itwill never be done until we have succeeded in abolishing war. To do this, we need to persuade mankind to lookupon international questions in a new way, not as contests of force, in which the victory goes to the side which ismost skillful in killing people, but by arbitration (调解.in accordance with agreed principles of law. It is not easyto change very old mental habits, but this is what must be attempted. There are those who say that the adoption of this or that ideology would prevent war. I believe this to be a bigerror. All ideologies are based on dogmatic(教条式的）statements which are, at best, doubtful, and at worst,totally false. Their adherents believe in them fanatically(狂热地.that they are willing to go to war in support ofthem. The movement of world opinion during the past few years has been very largely such as we can welcome. Ithas become a commonplace(老生常谈.that nuclear war must be avoided. Of course very difficult problemsremain in the world, but the spirit in which they are being approached is a better one than it was some years ago. Ithas begun to be thought, even by the powerful men who decide whether we shall live or die, that negotiationsshould reach agreements even if both sides do not find these agreements wholly satisfactory. It has begun to beunderstood that the important conflict nowadays is not between different countries， but between Man and the atombomb. 答案解析
期货交易所为了稳定市场秩序，临时召开紧急会议商讨控制近日来白糖交易迅猛可能带来的风险，期货从业人员王某是会议成员之一。会后，王某随即告知其好友李某交易所将采取严格的风险控制措施，预料白糖价格将会大跌。李某得知消息，立刻卖空其手上的白糖合约，第二天李某平仓获利8万元。在该案例中，李某应承担的法律责任是（　）。答案解析
It is hard to track the blue whale, the ocean’s largest creature, which has almost been killed off by commercial whaling and is now listed as endangered species. Attaching radio devices to it is difficult, and visual sightings are too unreliable to give real insight into its behavior.　　So biologists were delighted early this year when, with the help of the Navy, they were able to track a particular blue whale for 43 days, monitoring its sounds. This was possible because of the Navy’s formerly top-secret system of underwater listening devices spanning the oceans.　　Tracking whales is but one example of an exciting new world just opening to civilian scientists after the cold war as the Navy starts to share and partly uncover its global network of underwater listening system built over the decades to track the ships of potential enemies.　　Earth scientists announced at a news conference recently that they had used the system for closely monitoring a deep-sea volcanic eruption (爆发) for the first time and that they plan similar studies.　　Other scientists have proposed to use the network for tracking ocean currents and measuring changes in ocean and global temperatures. The speed of sound in water is roughly one mile a second—slower than through land but faster than through air. What is most important, different layers Of ocean water can act as channels for sounds, focusing them in the same way a stethoscope (听诊器) does when it carries faint noises from a patient’s chest to a doctor’s ear. This focusing is the main reason that even relatively weak sounds in the ocean, especially low-frequency ones, can often travel thousands of miles 答案解析
《期货交易管理条例》的施行时间是（）。答案解析
Engineering students are supposed to be examples of practicality and rationality, but when it comes to my college education I am an idealist and a fool. In high school I wanted to be an electrical engineer and, of course, any sensible student with my aims would have choose a college with a large engineering department, famous reputation and lots of good labs and research equipment. But that’s not what I did. I choose to study engineering at a small liberal-arts(文科) university that doesn’t even offer a major in electrical engineering. Obviously, this was not a practical choice; I came here for more noble reasons. I wanted a broad education that would provide me with flexibility and a value system to judge me in my career. I wanted to open my eyes and expand my vision by interacting with people who weren’t studying science or engineering. My parents; teachers and other adults praised me for such a sensible choice. They told me I was wise and mature beyond my 18 years, and I believed them. I headed off to college, sure, I was going to have an advantage over those students who went to big engineering "factories" where they didn’t care if you have values or were flexible. I was going to be a complete engineer, technical genius and sensitive humanist all in one. Now I’m not so sure. Somewhere along the way my noble ideals crashed into reality, as all noble ideals eventually do. After three years of struggling to balance maths, physics and engineering courses with liberal-arts courses, I have learned there are reasons why few engineering students try to reconcile engineering with liberal-arts courses in college. The reality that has blocked my path to become the typical successful student is that engineering and the liberal arts simply don’t mix as easily as I assumed in high school, individually they shape a person in very different ways; together they threaten to confuse. The struggle to reconcile the two fields of study is difficult. 答案解析
Engineering students are supposed to be examples of practicality and rationality, but when it comes to my college education I am an idealist and a fool. In high school I wanted to be an electrical engineer and, of course, any sensible student with my aims would have choose a college with a large engineering department, famous reputation and lots of good labs and research equipment. But that’s not what I did. I choose to study engineering at a small liberal-arts(文科) university that doesn’t even offer a major in electrical engineering. Obviously, this was not a practical choice; I came here for more noble reasons. I wanted a broad education that would provide me with flexibility and a value system to judge me in my career. I wanted to open my eyes and expand my vision by interacting with people who weren’t studying science or engineering. My parents; teachers and other adults praised me for such a sensible choice. They told me I was wise and mature beyond my 18 years, and I believed them. I headed off to college, sure, I was going to have an advantage over those students who went to big engineering "factories" where they didn’t care if you have values or were flexible. I was going to be a complete engineer, technical genius and sensitive humanist all in one. Now I’m not so sure. Somewhere along the way my noble ideals crashed into reality, as all noble ideals eventually do. After three years of struggling to balance maths, physics and engineering courses with liberal-arts courses, I have learned there are reasons why few engineering students try to reconcile engineering with liberal-arts courses in college. The reality that has blocked my path to become the typical successful student is that engineering and the liberal arts simply don’t mix as easily as I assumed in high school, individually they shape a person in very different ways; together they threaten to confuse. The struggle to reconcile the two fields of study is difficult. 答案解析
2012年大豆期货交易活跃，某客户在某期货公司营业部开户并存人5000万元准备进行红枣期货交易。由于某些原因该客户一直没有交易，营业部经理王某擅自利用这些资金以自己的名义买进了多手期货合约。在该案例中王某违犯了下列（　）规定。答案解析