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简述教师的职业角色。

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Passage 2 Questions 6 to 10 are based on the following passage: When aluminum was first produced about a hundred and fifty years ago, it was so difficult to separate form the ores in which it was found that its price was higher than that of gold. The price remained high until a new process was discovered for refining the metal with the aid of electricity approximately three quarters of a century later. The new method was so much cheaper that aluminum because practical for many purposes, one of which was making pots and pans. Aluminum is lightweight, rustproof and easily shaped into different forms. By mixing it with other metals, scientists have been able to produce a variety of alloys, some of which have the strength of steel but weigh only one third as much. Today, the uses of aluminum are innumerable. Perhaps its most important use is in transportation. Aluminum is found in the engine of automobiles, in the hulls of boats. It is also used in many parts of airplanes. In fact, the huge “airbus” planes would probably never have been produced if aluminum did not exist. By making vehicles lighter in weight aluminum has greatly reduced the amount of fuel needed to move them, Aluminum is also being used extensively in the building industry in some countries. Since aluminum is such a versatile (多用的) metal, it is fortunate that bauxite (铝土矿), which is one of its chief sources, is also one of the earth’s most plentiful substances. As the source of aluminum is almost inexhaustible, we can expect that more and more uses will be found for this versatile metal. 6. The price of aluminum was sharply reduced when people discovered a new refining process with the aid of . A. wind B. solar energy C. hydraulic power D. electricity 7. Aluminum is . A. lightweight, rustproof but not easily shaped into different forms B. heavyweight, rustproof and easily shaped into different forms C. lightweight, rustproof and easily shaped into different forms D. lightweight and easily shaped into different forms but it is easy to become rusty 8. Which of the following is NOT true? A. Aluminum is widely used in transportation. B. Aluminum is also used in many parts of airplanes. C. Aluminum is being used extensively in the building industry. D. Aluminum is not used in its pure form. 9. Aluminum is found on earth mostly in the form of . A. pure metal B. bauxite C. gold D. liquid 10. What is the passage talking about? A. The features of aluminum and its functions. B. The process of aluminum. C. The discovery of aluminum. D. The promising future of aluminum.
试题分类: 大学英语四级
练习次数:0次
Passage 3 Questions 11 to 15 are based on the following passage: Unlike their American or European counterparts, car salesmen in Japan work hard to get a buyer. Instead of lying lazily around showrooms waiting for customers to drop by, many Japanese car salesmen still go out to get them. They walk wearily along the streets cars door-to-door. New customers are hunted with fruit and cakes on their birthdays. But life is getting tough, and not just because new-car sales are falling. With more Japanese women (who often control the household budget) going out to work, the salesmen increasingly find nobody at home when they call. That means another visit in the evening or the weekend. Then they face an extra problem: more people, especially the young, prefer to choose a new car from a showroom where they can compare different models. Even as late as the mid-1980s some 90% of new cars were sold door-to-door. In some rural areas most new cars are still sold this way. But in the big cities more than half the new cars are now sold from showrooms. Although investing in showrooms is expensive because of the high cost of Japanese land, dealers have little choice. A labor shortage and higher among Japan’s workforce are making it difficult to hire door-to-door salesmen. Most of a Japanese car salesman’s working day is spent doing favors for customers, like arranging insurance or picking up vehicles for servicing, rather than actually selling. Japan’s doorstep car salesmen are not about to vanish. The personal service they provide is so deep-rooted in Japan that they are likely to operate alongside the glittering new showrooms. The two systems even complement each other. What increasingly happens is that the showroom attracts the interest of a potential buyer, giving the footsore salesmen a firm lead to follow up with a home visit. 11. Japanese car sales usually do not wait at showrooms for customers to drop by; instead, . A. they sell cars door-to-door B. they buy presents for their customers C. they enjoy themselves in recreation centers D. they go out to do market researches 12. Implied but stated: the competition in car market is . A. light B. moderate C. fierce D. unfair 13. Young people like to buy a new car . A. at home B. from a showroom C. made in the U.S.A. D. made in Japan 14. The squadron of Japanese car salesmen is reducing because of . A. a labor shortage B. higher expectations among Japan’s workforce C. high cost land D. both A and B 15. Japanese car salesmen to their customers many favors such as . A. showing them around in an exhibition B. arranging insurance C. paying them a visit on weekends D. selling ole cars for them
试题分类: 大学英语六级
练习次数:0次
Which is safer-staying at home, traveling to work on public transport, or working in the office? Surprisingly, each of these carries the same risk, which is very low. However, what about flying compared to working in the chemical industry? Unfortunately, the former is 65 times riskier than the latter! In fact, the accident rate of workers in the chemical industry is less than that of almost any of human activity, and almost as safe as staying at home. The trouble with the chemical industry is that when things go wrong they often cause death to those living nearby. It is this which makes chemical accidents so newsworthy. Fortunately, they are extremely rare. The most famous ones happened at Texas City (1947),Flixborough (1974), Seveso (1976), Pemex (1984) and Bhopal (1984)。 Some of these are always in the minds of the people even though the loss of life was small. No one died at Seveso, and only 28 workers at Flixborough. The worst accident of all was Bhopal, where up to 3,000 were killed. The Texas City explosion of fertilizer killed 552. The Pemex fire at a storage plant for natural gas in the suburbs of Mexico City took 542 lives, just a month before the unfortunate event at Bhopal. Some experts have discussed these accidents and used each accident to illustrate a particular danger. Thus the Texas City explosion was caused by tons of ammonium nitrate(硝酸铵),which is safe unless stored in great quantity. The Flixborough fireball was the fault of management, which took risks to keep production going during essential repairs. The Seveso accident shows what happens if the local authorities lack knowledge of the danger on their doorstep. When the poisonous gas drifted over the town, local leaders were incapable of taking effective action. The Pemex fire was made worse by an overloaded site in an overcrowded suburb. The fire set off a chain reaction os exploding storage tanks. Yet, by a miracle, the two largest tanks did not explode. Had these caught fire, then 3,000 strong rescue team and fire fighters would all have died. 1.Chemical accidents are usually important enough to be reported as news because ____. A.they are very rare B.they often cause loss of life C.they always occur in big cities D.they arouse the interest of all the readers 2.Which of the following statements is true? A.Working at the office is safer than staying at home. B.Traverlling to work on public transport is safer than working at the office. C.Staying at home is safer than working in the chemical industry. D.Working in the chemical industry is safer than traveling by air. 3.According to passage, the chemical accident that caused by the fault of management happened at ____. A.Texas city B.Flixborough C.Seveso D.Mexico City 4.From the discussion among some experts we may coclude that ____. A.to avoid any accidents we should not repair the facilities in chemical industry B.the local authorities should not be concerned with the production of the chemical industry C.all these accidents could have been avoided or controlled if effective measure had been taken D.natural gas stored in very large tanks is always safe 5.From the passage we know that ammonium nitrate is a kind of ____. A.natural gas, which can easily catch fire B.fertilizer, which can't be stored in a great quantity C.poisonous substance, which can't be used in overcrowded areas D.fuel, which is stored in large tanks
试题分类: 大学英语六级
练习次数:13次
试题分类: 施工员
练习次数:0次
某水库枢纽工程有主坝、副坝、溢洪道、电站及灌溉引水隧洞等建筑物组成,水库总库容 5.84x108m3,电站装机容量6.0MW,主坝为粘土心墙土石坝最大坝高90.3 米,灌溉引水洞引水 流量 45m3/s,溢洪道控制段共5 孔,每孔净宽 15 米,程施工过程中发生如下 事件: 事件一:为加强工程施工安全生产管理,根据《水利工程施工安全管理导则》 (SL721-2015 )第 14 页 共 21 页等有关 规定,项目法人组织制定了安全目标管理制度,安全设施“三同时”管理制度等多项安全生产管理制度并对施工单位安全生产许可证,三类人员安全生产考核合格证及特种作业人员持证上岗等情况进行核查。 事件二:工程开工前,施工单位根据《水电水利工程施工重大危险源辨识及评价导则》(DL/T5274~2012),对各单位工程的重大危险源分别进行了辨识和评价,通过作业条件危险性评价,部分单位工程危险性大小值及事故可能造成的人员伤亡,数量和财产损失情况如下: 主坝: 危险性大小值 D 为 240 ,可能造成 10 ~20 人死亡,直接经济损失,2000~3000万元, 副坝:危险性大小值 D 为 120 ,可能造成 1 ~2 人死亡,直接经济损失,200~300万元, 溢洪道:危险性大小值D 为 270 ,可能造成 3 ~5 人死亡,直接经济损失,300~400 万 引水洞: 危险性大小值 D 为 540 ,可能造成 1 ~2 人死亡, 直接经济损失, 1000~1500 万元 事件三:电站基坑开挖前,施工单位编制了施工措施计划部分内容如下: (1)施工用电有系统电网接入,现场安装变压器一台; (2)基坑采用明挖施工,开挖深度95 米,下部岩石采用爆破作业,规定每次装药量不得大于 50kg ,雷 雨天气禁止爆破作业; (3)电站厂房墩墙采用落地式式钢管脚手架施工,墩墙最大高度26m ; (4)混凝土浇筑采用,塔式起重机进行垂直运输,每次混凝土运输量不超过6m3,并要求风力超过 7 级暂停施工。 【问题】 1. 指出本水库枢纽工程的等别、电站主要建筑物和临时建筑物的级别,以及本工程施工项目负责人应具有的建造师级别。 2. 根据《水利工程建设安全生产管理规定》(水利部令第 26 号)和《水利工程施正安全管理导 则》(SL721-2015 ),说明事件一中“三类人员”和“三同时”所代表的具体内容。 3. 根据《水电水利工程施工重大危险源辨识及评价导则》(DL/T5274-2012 ),依据事故可能造成人员伤亡数量及财产损失情况,重大危险源共划分为几级?根据事件二的评价结果分别说明主坝、副坝、溢洪道、引水洞单位工程的重大危险源级别。 4. 根据《水电水利工程施工重大危险源辨识及评价导则》(DL/T5274-2012 ),在事件三涉及的生产、施工作业中,宜列入重大危险源重点评价对象的有哪些?
试题分类: 一级建造师
练习次数:1次
In some countries where racial prejudice is acute, violence has so come to be taken for granted as a means of solving differences, that it is not even questioned. There are countries where the white man imposes his rule by brute force; there are countries where the black man protests by setting fire to cities and by looting and pillaging. Important people on both sides, who would in other respects appear to be reasonable men, get up and calmly argue in favor of violence – as if it were a legitimate solution, like any other. What is really frightening, what really fills you with despair, is the realization that when it comes to the crunch, we have made no actual progress at all. We may wear collars and ties instead of war-paint, but our instincts remain basically unchanged. The whole of the recorded history of the human race, that tedious documentation of violence, has taught us absolutely nothing. We have still not learnt that violence never solves a problem but makes it more acute. The sheer horror, the bloodshed, the suffering mean nothing. No solution ever comes to light the morning after when we dismally contemplate the smoking ruins and wonder what hit us. The truly reasonable men who know where the solutions lie are finding it harder and herder to get a hearing. They are despised, mistrusted and even persecuted by their own kind because they advocate such apparently outrageous things as law enforcement. If half the energy that goes into violent acts were put to good use, if our efforts were directed at cleaning up the slums and ghettos, at improving living-standards and providing education and employment for all, we would have gone a long way to arriving at a solution. Our strength is sapped by having to mop up the mess that violence leaves in its wake. In a well-directed effort, it would not be impossible to fulfill the ideals of a stable social programme. The benefits that can be derived from constructive solutions are everywhere apparent in the world around us. Genuine and lasting solutions are always possible, providing we work within the framework of the law. Before we can even begin to contemplate peaceful co-existence between the races, we must appreciate each other's problems. And to do this, we must learn about them: it is a simple exercise in communication, in exchanging information. "Talk, talk, talk," the advocates of violence say, "all you ever do is talk, and we are none the wiser." It's rather like the story of the famous barrister who painstakingly explained his case to the judge. After listening to a lengthy argument the judge complained that after all this talk, he was none the wiser. "Possible, my lord," the barrister replied, "none the wiser, but surely far better informed." Knowledge is the necessary prerequisite to wisdom: the knowledge that violence creates the evils it pretends to solve. 1. What is the best title for this passage? [A] Advocating Violence. [B] Violence Can Do Nothing to Diminish Race Prejudice. [C] Important People on Both Sides See Violence As a Legitimate Solution. [D] The Instincts of Human Race Are Thirsty for Violence. 2. Recorded history has taught us [A] violence never solves anything. [B] nothing. [C] the bloodshed means nothing. [D]everything. 3. It can be inferred that truly reasonable men [A] can't get a hearing. [B] are looked down upon. [C] are persecuted. [D] Have difficulty in advocating law enforcement. 4. "He was none the wiser" means [A] he was not at all wise in listening. [B] He was not at all wiser than nothing before. [C] He gains nothing after listening. [D] He makes no sense of the argument. 5. According the author the best way to solve race prejudice is [A] law enforcement. [B] knowledge. [C] nonviolence. [D] Mopping up the violent mess.
试题分类: 专业英语八级
练习次数:4次
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