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Air quality in Britain has improved considerably in the last 30years. Total emissions of smoke in the air haverisen by over 85 per cent since 1950. The domestic (1)____smoking control program has been particularly important in (2)____achieving this result. London and other major cities are no (3)____longer have the dense smoke-laden “smogs” of the1950s, and in central London winter sunshine has (4)____increased about 70 per cent since 1958. (5)____ Since 1990, daily air pollution data from theBritish monitoring network has been made available (6)____to the public by the Department of the Environ-ment’s Air Quality Bulletins. These give the concen-trations of three main pollutants-ozone, nitrogendioxide and sulfur dioxide –and grade air qualityon a scale between “very weak” and “very (7)____good”. The information features in television andradio weather reports, appears in many national and (8)____local newspapers. Therefore, the data are available (9)____on a special free telephone number and on videotext systems. A comprehensive review of the issue of urbanair quality was published in January 1992. Threeindependent committees of which experts have been (10)____established to advise on different aspects of the problem, andwill set guidelines and targets for air quality. The network isalso being extended and upgraded at a cost of ￡10 million.
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更多 “问答题Air quality in Britain has improved considerably in the last 30years. Total emissions of smoke in the air haverisen by over 85 per cent since 1950. The domestic (1)____smoking control program has been particularly important in (2)____achieving this result. London and other major cities are no (3)____longer have the dense smoke-laden “smogs” of the1950s, and in central London winter sunshine has (4)____increased about 70 per cent since 1958. (5)____ Since 1990, daily air pollution data from theBritish monitoring network has been made available (6)____to the public by the Department of the Environ-ment’s Air Quality Bulletins. These give the concen-trations of three main pollutants-ozone, nitrogendioxide and sulfur dioxide –and grade air qualityon a scale between “very weak” and “very (7)____good”. The information features in television andradio weather reports, appears in many national and (8)____local newspapers. Therefore, the data are available (9)____on a special free telephone number and on videotext systems. A comprehensive review of the issue of urbanair quality was published in January 1992. Threeindependent committees of which experts have been (10)____established to advise on different aspects of the problem, andwill set guidelines and targets for air quality. The network isalso being extended and upgraded at a cost of ￡10 million.” 相关考题
考题
Japanese quality control has improved dramatically in the last 30 years for all of the following reasons except:A . the use of quality circles.B . small, continuous improvements in quality control.C . the use of worker suggestion systems.D . the use of quality control charts.E . focusing quality control efforts on production outputs.
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It has been over a century _______ the railway was completed.
(A)when(B) once(C) which(D) since
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Nobody in the class except you and me _____ to the principal about the air quality
A.has complainedB.have complainedC.complainD.complaining
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It has been ten years now since the Labor Party came to ( ).
A、chargeB、forceC、powerD、control
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第一组： The Wartsila 50DF operates on the lean-bum principle: the mixture of air and gas in the cylinder has more air than is needed for complete combustion. Lean combustion reduces peak temperatures and therefore NOx emissions. Efficiency is increased and higher output is reached while avoiding knocking. Combustion of the lean air-fuel mixture is initiated by injecting a small amount of LFO (pilot fuel) into the cylinder. The pilot fuel is ignited in a conventional diesel process, providing a high-energy ignition source for the main engine. To obtain the best efficiency and lowest emissions, every cylinder is individually controlled to ensure operation at the correct air-fuel ratio and with the correct amount and timing of pilot fuel rejection. Wartsila has developed a special electronic control system to cope with the demanding task of controlling the combustion in each cylinder, and to ensure optimal performance in terms of efficiency and emissions under all conditions by keeping each cylinder within the operating window. Stable and well-controlled combustion also contributes to less mechanical and thermal load on the engine components. Current stringent emission regulations demand the reduction of NOx emissions. In an internal combustion engine this means controlling peak temperature and residence time, which are the main parameters governing NOx formations. In the Wartsila 50DF engine, the air-fuel ratio is very high (typically 2.2). Since the same specific heat quantity released by combustion is used to heat up a larger mass of air, the maximum temperature and consequently NOx formation are lower. The mixture is uniform. throughout the cylinder since the fuel and air are premixed before introduction into the cylinders, which helps to avoid local NOx formation points within the cylinder. Benefiting from this unique feature, NOx emissions from the Wartsila 50DF are extremely and comply with the most stringent existing legislation.What is the combustion feature of the Wartsila 50DF?A.Lean air in the cylinderB.Excessive fuel in the cylinderC.Excessive air in the cylinderD.Spark ignition
考题
The notice has been told everyone __________ a party will be held in the open air tomorrow.A.whether
B.when
C.where
D.that
考题
The manager __________the workers how to improve the program since 9 a.m.A.has told
B.is telling
C.has been telling
D.will have told
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American DreamsThere is a common response to America among foreign writers:the US is a land of extremes where the best of things are just as easily found as the worst. This is a cliche（陈词滥调）.In the land of black and white,people should not be too surprised to find some of the biggest gaps between the rich and the poor in the world.But the American Dream offers a way out to everyone.______(46)No class system or government stands in the way.Sadly,this old argument is no longer true.Over the past few decades there has been a fundamental shift in the structure of the American economy.The gap between the rich and the poor has widened and widened.______(47)Over the past 25 years the median US family income has gone up 18 per cent.For the top 1 per cent,however,it has gone up 200 per cent. Twenty-five years ago the top fifth of Americans had an average income 6 .7 times that of the bottom fifth.______（48)Inequalities have grown worse in different regions.In California,incomes for lower class fam-dies have fallen by 4 per cent since 1969.______(49)This has led to an economy hugely in favor of a small group of very rich Americans.The wealthiest 1 per cent of households now control a third of the national wealth.There are now 37 million Americans living in poverty. At 12.7 per cent of the population,it is the highest percentage in the developed world.Yet the tax burden on America's rich is falling,not growing.______(50)There was an economic theory holding that the rich spending more would benefit everyone as a whole.But clearly that theory has not worked in reality.______(48)A: Nobody is poor in the US.B: Thetop0.01 per cent of households has seen its tax bite fall by a full 25 percentage points since 1980.C: For upper class families they have risen 41 per cent.D: Nowitis9.8 times.E: As it does so,the possibility to cross that gap gets smaller and smafler.F: All one has to do is to work hard and climb the ladder towards the top.
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American DreamsThere is a common response to America among foreign writers:the US is a land of extremes where the best of things are just as easily found as the worst.This is a cliché（陈词滥调）.In the land of black and white,people should not be too surprised to find some of thebiggest gaps between the rich and the poor in the world.But the American Dream offers away out to everyone.__________(1)No class system or government stands in the way.Sadly,this old argument is no longer true.Over the past few decades there has been a fundamental shift in the structure of the American economy.The gap between the rich and the poor has widened and widened._______(2)Over the past 25 years the median US family income has gone up 18 per cent.For the top 1 per cent,however,it has gone up 200 per cent.Twenty-five years ago the top fifth of Americans had an average income 6. 7 times that of the bottom fifth._________(3)Inequalities have grown worse in different regions.In California,incomes for lower class families have fallen by 4 per cent since 1969.__________(4)This has led to an economy hugely in favor of a small group of very rich Americans.The wealthiest 1 per centof households now control a third of the national wealth.There are now 37 million Americans living in poverty.At 12.7 per cent of the population,it is the highest percentage in the developed world.Yet the tax burden on America's rich is falling,not growing.__________(5)There was an economic theory holding that the rich spending more would benefit everyone as a whole.But clearly that theory has not worked in reality._________（2）A:Nobody is poor in the US.B:The top 0.01 per cent of households has seen its tax bite fall by a full 25 percentage points since 1980.C:For upper class families they have risen 41 per cent.D:Now it is 9.8 times.E:As it does so,the possibility to cross that gap gets smaller and smaller.F:All one has to do is to work hard and climb the ladder towards the top.
考题
共用题干
American DreamsThere is a common response to America among foreign writers:the US is a land of extremes where the best of things are just as easily found as the worst.This is a cliché（陈词滥调）.In the land of black and white,people should not be too surprised to find some of thebiggest gaps between the rich and the poor in the world.But the American Dream offers away out to everyone.__________(1)No class system or government stands in the way.Sadly,this old argument is no longer true.Over the past few decades there has been a fundamental shift in the structure of the American economy.The gap between the rich and the poor has widened and widened._______(2)Over the past 25 years the median US family income has gone up 18 per cent.For the top 1 per cent,however,it has gone up 200 per cent.Twenty-five years ago the top fifth of Americans had an average income 6. 7 times that of the bottom fifth._________(3)Inequalities have grown worse in different regions.In California,incomes for lower class families have fallen by 4 per cent since 1969.__________(4)This has led to an economy hugely in favor of a small group of very rich Americans.The wealthiest 1 per centof households now control a third of the national wealth.There are now 37 million Americans living in poverty.At 12.7 per cent of the population,it is the highest percentage in the developed world.Yet the tax burden on America's rich is falling,not growing.__________(5)There was an economic theory holding that the rich spending more would benefit everyone as a whole.But clearly that theory has not worked in reality._________（3）A:Nobody is poor in the US.B:The top 0.01 per cent of households has seen its tax bite fall by a full 25 percentage points since 1980.C:For upper class families they have risen 41 per cent.D:Now it is 9.8 times.E:As it does so,the possibility to cross that gap gets smaller and smaller.F:All one has to do is to work hard and climb the ladder towards the top.
考题
共用题干
American DreamsThere is a common response to America among foreign writers:the US is a land of extremes where the best of things are just as easily found as the worst.This is a cliché（陈词滥调）.In the land of black and white,people should not be too surprised to find some of thebiggest gaps between the rich and the poor in the world.But the American Dream offers away out to everyone.__________(1)No class system or government stands in the way.Sadly,this old argument is no longer true.Over the past few decades there has been a fundamental shift in the structure of the American economy.The gap between the rich and the poor has widened and widened._______(2)Over the past 25 years the median US family income has gone up 18 per cent.For the top 1 per cent,however,it has gone up 200 per cent.Twenty-five years ago the top fifth of Americans had an average income 6. 7 times that of the bottom fifth._________(3)Inequalities have grown worse in different regions.In California,incomes for lower class families have fallen by 4 per cent since 1969.__________(4)This has led to an economy hugely in favor of a small group of very rich Americans.The wealthiest 1 per centof households now control a third of the national wealth.There are now 37 million Americans living in poverty.At 12.7 per cent of the population,it is the highest percentage in the developed world.Yet the tax burden on America's rich is falling,not growing.__________(5)There was an economic theory holding that the rich spending more would benefit everyone as a whole.But clearly that theory has not worked in reality._________（1）A:Nobody is poor in the US.B:The top 0.01 per cent of households has seen its tax bite fall by a full 25 percentage points since 1980.C:For upper class families they have risen 41 per cent.D:Now it is 9.8 times.E:As it does so,the possibility to cross that gap gets smaller and smaller.F:All one has to do is to work hard and climb the ladder towards the top.
考题
Since June last year the yuan has appreciated 7% against the dollar.The rise in China's relative costs has been even greater given its higher inflation rate.With stimulative fiscal and monetary policy bolstering domestic demand.China's current-account su
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American Dreams There is a common response to American among foreign writers: the US is a land of extremes where the best of things are just as easily found as the worst. This is a cliché (陈词滥调). In the land of black and white, people should not be too surprised to find some ofthe biggest gaps between the rich and the poor in the world. But the American Dreamoffers a way out to everyone. ______(1) No class system or government standsin the way.Sadly,this old argument is no longer true,Over the past few decades there has been a fundamental shift in the s tructure of the American economy.The gap between the rich and the poor has widened and widened.______(2)Over the past 25 years the median US family income has gone up 18 per cent.For the top 1 per cent,however,it has gone up 200 per cent.Twenty-five years ago the top fifth of Americans had an average income 6.7 times that of the bottom fifth._______(3)Inequalities have grown worse in different regions.In California,incomes for lower class families have fallen by 4 per cent since 1969._______(4)This has led to an economy hugely in favor of a small group of very rich Americans.The wealthiest 1 per cent of households now control a third of the national wealth.There are now 37 million Americans living in poverty.At 12.7 per cent of the population,it is the highest percentage in the developed world.Yet the tax burden on America's rich is falling,not growing.________(5)There was an economic theory holding that the rich spending more would benefit everyone as a whole.But clearly that theory has not worked in reality._________（5）A: Nobody is poor in the US.B: The top 0.01 per cent of households has seen its tax bite fall by a full 25 percentage points since 1980.C:.For upper class families they have risen 41 per cent.D: Nowitis9.8 times.E: As it does so,the possibility to cross that gap gets smaller and smaller.F: All one has to do is to work hard and climb the ladder towards the top.
考题
共用题干
American Dreams There is a common response to American among foreign writers: the US is a land of extremes where the best of things are just as easily found as the worst. This is a cliché (陈词滥调). In the land of black and white, people should not be too surprised to find some ofthe biggest gaps between the rich and the poor in the world. But the American Dreamoffers a way out to everyone. ______(1) No class system or government standsin the way.Sadly,this old argument is no longer true,Over the past few decades there has been a fundamental shift in the s tructure of the American economy.The gap between the rich and the poor has widened and widened.______(2)Over the past 25 years the median US family income has gone up 18 per cent.For the top 1 per cent,however,it has gone up 200 per cent.Twenty-five years ago the top fifth of Americans had an average income 6.7 times that of the bottom fifth._______(3)Inequalities have grown worse in different regions.In California,incomes for lower class families have fallen by 4 per cent since 1969._______(4)This has led to an economy hugely in favor of a small group of very rich Americans.The wealthiest 1 per cent of households now control a third of the national wealth.There are now 37 million Americans living in poverty.At 12.7 per cent of the population,it is the highest percentage in the developed world.Yet the tax burden on America's rich is falling,not growing.________(5)There was an economic theory holding that the rich spending more would benefit everyone as a whole.But clearly that theory has not worked in reality._________（2）A: Nobody is poor in the US.B: The top 0.01 per cent of households has seen its tax bite fall by a full 25 percentage points since 1980.C:.For upper class families they have risen 41 per cent.D: Nowitis9.8 times.E: As it does so,the possibility to cross that gap gets smaller and smaller.F: All one has to do is to work hard and climb the ladder towards the top.
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共用题干
American Dreams There is a common response to American among foreign writers: the US is a land of extremes where the best of things are just as easily found as the worst. This is a cliché (陈词滥调). In the land of black and white, people should not be too surprised to find some ofthe biggest gaps between the rich and the poor in the world. But the American Dreamoffers a way out to everyone. ______(1) No class system or government standsin the way.Sadly,this old argument is no longer true,Over the past few decades there has been a fundamental shift in the s tructure of the American economy.The gap between the rich and the poor has widened and widened.______(2)Over the past 25 years the median US family income has gone up 18 per cent.For the top 1 per cent,however,it has gone up 200 per cent.Twenty-five years ago the top fifth of Americans had an average income 6.7 times that of the bottom fifth._______(3)Inequalities have grown worse in different regions.In California,incomes for lower class families have fallen by 4 per cent since 1969._______(4)This has led to an economy hugely in favor of a small group of very rich Americans.The wealthiest 1 per cent of households now control a third of the national wealth.There are now 37 million Americans living in poverty.At 12.7 per cent of the population,it is the highest percentage in the developed world.Yet the tax burden on America's rich is falling,not growing.________(5)There was an economic theory holding that the rich spending more would benefit everyone as a whole.But clearly that theory has not worked in reality._________（1）A: Nobody is poor in the US.B: The top 0.01 per cent of households has seen its tax bite fall by a full 25 percentage points since 1980.C:.For upper class families they have risen 41 per cent.D: Nowitis9.8 times.E: As it does so,the possibility to cross that gap gets smaller and smaller.F: All one has to do is to work hard and climb the ladder towards the top.
考题
Her uncle′s health has greatly improved______ he stopped smoking.A.before
B.since
C.when
D.while
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共用题干
American DreamsThere is a common response to America among foreign writers:the US is a land of extremes where the best of things are just as easily found as the worst. This is a cliche（陈词滥调）.In the land of black and white,people should not be too surprised to find some of the biggest gaps between the rich and the poor in the world.But the American Dream offers a way out to everyone._______(46)No class system or government stands in the way.Sadly,this old argument is no longer true.Over the past few decades there has been a fundamental shift in the structure of the American economy.The gap between the rich and the poor has widened and widened._______( 47)Over the past 25 years the median US family income has gone up 18 per cent. For the top 1 per cent,however,it has gone up 200 per cent. Twenty-five years ago the top fifth of Americans had an average income 6.7 times that of the bottom fifth._______(48)Inequalities have grown worse in different regions.In California,incomes for lower class families have fallen by 4 per cent since 1969._______(49)This has led to an economy hugely in favor of a small group of very rich Americans.The wealthiest 1 per cent of households now control athird of the national wealth. There are now 37 million Americans living in poverty.At 12.7 per cent of the population,it is the highest per centage in the developed world.Yet the tax burden on America's rich is falling,not growing._______(50)There was an economic theory holding that the rich spending more would benefit everyone as a whole.But clearly that theory has not worked in reality.__________（48）A:Nobody is poor in the US.B:The top 1 per cent of households has seen its tax bite fall by a full 25 percentage points since 1980.C:For upper class families they have risen 41 per cent.D:Now it is 9.8 times.E:As it does so,the possibility to cross that gap gets smaller and smaller. F: All one has to do is to work hard and climb the ladder towards the top.
考题
After a server has been installed into a rack, an administrator must ensure which of the following?（）A、Warm air flow is permitted through the front bezelB、The system is labeled so that it can be identifiedC、Verify the change control process can be implementedD、Determine the correct power requirements
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单选题Purging air from a hydraulic system is necessary when（）A
adding small amounts of oil to the systemB
the system has been overheatedC
the system has been drained and then filled with new oilD
the system has been idle for a long period of time
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单选题A
It affects the growth of trees.B
It has been increasing since the Ice Age.C
It is determined by the chemicals in the air.D
It follows a certain cycle.
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问答题Smoking bans in public places are becoming more and more common in China. Whether the right of the non-smoker to breathe in fresh air outweighs that of the smoker to smoke freely is a matter of opinion, manifesting itself in a heated smoking ban debate. The following are opinions from both sides on this issue. Read the excerpts carefully and write your response in about 300 words, in which you should: 1. summarize briefly the opinions from both sides, and then 2. give your comment. Marks will be awarded for content relevance, content sufficiency, organization and language quality. Failure to follow the above instructions may result in a loss of marks. A smoking ban is a public policy that includes criminal laws and health regulations that prohibit smoking in certain public places and workspaces. There are many reasons why smoking bans originated, but most of these have medical origins. Research has shown secondhand smoke is almost as harmful as smoking in and of itself. The effects of secondhand smoke are relatively the same as smoking. Lung disease, heart disease, bronchitis and asthma are common. Those who live in homes with smokers have a 20-30 percent higher risk of developing lung cancer than those who do not live with a smoker. Smoking bans are also imposed because they improve air quality in restaurants and other establishments. In Beijing, it is now illegal to smoke in all hospitality venues. Studies have also shown employees are exposed to far fewer toxins in areas where smoking is banned in the workplace. Despite the positive effects on health and air quality, many people are still opposed to smoking bans in China. Critics oppose smoking bans and see these laws as an example of the government interfering in people’s lives. They look at the effects on smokers, not those on non-smokers who are subjected to second-hand smoke. Other critics emphasize the rights of the property owner and draw distinctions between public places, such as government building and privately owned businesses, such as stores and restaurants. Some critics of smoking bans believe that outlawing smoking in the workplace may cause smokers to simply move their smoking elsewhere. Instead of smoking indoors, workers may begin smoking in public parks and exposing a new set of people to their secondhand smoke.
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单选题______ my opinion, customer service here has improved but not as much as expected over the last 2 years.A
OnB
InC
ForD
With
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问答题The Environment in Perspective:Is Everything Getting Steadily Worse? Much of the discussion of environmental problems in the popular press leaves the reader with the impression that matters have been growing steadily worse, and that pollution is largely a product of the profit system and modern industrialization. There are environmental problems today that are both enormous and pressing, but in fact pollution is nothing new. Medieval cities were pestholes—the streets and rivers were littered with garbage and the air stank of rotting wastes. At the beginning of the eighteenth century, a German traveler reported that to get a view of London from the tower of St. Paul’s, one had to get there very early in the morning “before the air was full of coal smoke.” Since 1960 there has been progress in solving some pollution problems, much of it the result of concerted efforts to protect the environment. The quality of the air in most Canadian cities has improved. In Toronto, for example, the concentration of suspended particulates, or soot, in the air has fallen dramatically since 1962. To put this figure in perspective, it should be noted that the current health advisory level for the index is 32. At a level of 58, people with chronic respiratory diseases may be affected. At 100, even healthy people may be affected by prolonged conditions, and those with cardiac and respiratory diseases could suffer severe effects Recently in Toronto, the index has exceeded 32 on fewer than half a dozen days annually. Similar improvements have occurred elsewhere in Canada and in other industrialized countries. Even the famous, or rather infamous, “fogs” of London are almost a thing of the past. There have been two high readings of particular note in the British capital in 1959 (when the index rose to 275 and there was a 10 percent increase over the normal number of deaths) and in 1962 (when the index rose to 575 and there was a 20 percent increase in mortality). But more recently, London’s, cleaner air has resulted in an astounding 50 percent increase in the number of hours of winter sunshine. In short, pollution problems are not a uniquely modem phenomenon, nor is every part of the environment deteriorating relentlessly. Environmental problems do not occur exclusively in capitalist economies. For example, in the People’s Republic of China, coal soot from factory smokestacks in Beijing envelops the city in a thick black haze. Similarly, smoke from brown-coal furnaces pollutes the air almost everywhere in Eastern Europe. It has been estimated that a third of Poland’s citizens live in areas of “ecological disaster”. The citizens of Leipzig, a major industrial city in what was formerly East Germany, have a life expectancy a full six years shorter than the national average. However, we do not mean to suggest that all is well with the environment in market-oriented economies or that there is nothing more to do. While there have been some improvements, serious problems remain. Our world is now subject to a number of new pollutants, most of which are far more dangerous than those we have reduced, even though they may be less visible and less malodorous While environmental problems are neither new nor confined only to capitalist, industrialized economies, these facts are not legitimate grounds for complacency. The potential damage that we are inflicting on ourselves and on our surroundings is very real and very substantial.
考题
单选题The notice has been told everyone _____ a party will be held in the open air tomorrow.A
whetherB
whenC
whereD
that
考题
单选题Steam smoke will occur when（）.A
Extremely cold air from shore passes over warmer waterB
Warm dry air from shore passes over cooler waterC
Cold ocean water evaporates into warm airD
Cool rain passes through a warm air mass
考题
单选题Hannah finished building her new all-purpose projects room last year, and she has been working in the room ever since.A
and she has been working in the room ever sinceB
and since that time she has worked thereC
where always since she worksD
she has been working in that room ever sinceE
and since then is working there
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