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Some conventional retailers have reported rising profits this year because
A．they maintain reasonable stock.
B．they cut their retail outlets.
C．they increase their revenues.
D．they use discounting as an effective means.
答案
更多“Some conventional retailers have reported rising profits this year becauseA．they maintain”相关的问题
第1题
Car Pollution
Jump in the car, start your engine and you're off. But do you give any thought to what's coming out of the tailpipe as you go about your drive？
Carbon dioxide is the dominant greenhouse gas that causes global warming. The effects of global warming are uncertain, but they potentially include disruption of global weather patterns and ecosystems, flooding, severe storm, and droughts.
Carbon monoxide, when inhaled, combines with haemoglobin in our blood, impairing the flow of oxygen to our brain and other parts of the body. Carbon monoxide is colourless, odourless, and poisonous even to healthy people (at high levels). It can seriously affect people with heart disease, and can affect the central nervous system. Motor vehicles are the main source of carbon monoxide pollution in many countries.
Sulphur oxides contribute to respiratory illness, particularly in children and the elderly, and aggravate existing heart and lung diseases. It contributes to the formation of acid rain, which damages trees, crops, and buildings; and makes soils, lakes, and streams acidic.
Nitrogen oxide is a noxious pollutant. It is a lung irritant and reacts with compounds in the air to cause acid rain and ozone (the main reason for smog). Nitrogen oxide is one of the main ingredients involved in the formation of ground-level ozone (which can trigger serious respiratory problems), and contributes to global warming.
Particulate matter, consisting of tiny particles of smoke, soot and dust primarily from engines, car parts, tires, and diesel exhaust, are an established cause of lung problems, from shortness of breath to worsening of respiratory and cardiovascular disease, damage to lung tissues, and cancer. The EPA estimates that particulate pollution kills more than 60,000 people per year. In addition, particulates are associated with increased hospital ad missions and emergency room visits for people with heart and lung disease, as well as work and school absences. Particulates can travel deep into the lungs, or in smaller form, directly into the bloodstream.
Hydrocarbons, in their many forms, are directly hazardous, contributing to what are collectively called "air toxics." These compounds directly irritate the lung and other tissues, can cause cancer, contribute to birth defects, and cause other illnesses.
Lead damages organs, affects the brain, nerves, heart, and blood. Although overall blood lead levels have decreased since 1976, urban areas with high levels of traffic or industrial facilities that burn fuel may still have high lead levels in air. In 1999, ten areas of the country did not meet the national health-based air quality standards for lead.
Hybrid cars use less gas, and therefore produce fewer emissions, than conventional cars. Take a look at the statistics below (based on a car travelling 14,000 miles per year).
A conventional car produces 11,100 pounds of CO2 per year, compared with the 4,800 pounds of CO2 produced by a hybrid car.
A conventional car produces 330 pounds of carbon monoxide per year, compared with the 230 pounds produced by a hybrid car.
A conventional car produces 49 pounds of nitrogen oxide per year, compared with the 17 pounds produced by a hybrid car.
A conventional car produces 670 grams of particulate matter per year, compared with the 240 grams produced by a hybrid car.
A conventional car produces 29 pounds of hydrocarbons per year, compared with the 8 pounds produced by a hybrid car.
Rolling Up Your Window Won't Help
Exposure to some car pollutants may be much higher inside your car than outside. Commuters driving in rush hour get the highest exposure, often from pollutants emitted by vehicles ahead of them. You are basically driving in and through -- and contributing to -- a le
A．Y
B．N
C．NG
第2题
A．Y
B．N
C．NG
第3题
According to the governor, why should one use solar panels？
A．The new law requires every resident to install them.
B．They are environmentally friendly and efficient.
C．The energy industry needs to be supported.
D．They costs less to install than the conventional method.
第4题
In the 1950s, the pioneers of artificial intelligence (AI) predicted that, by the end of this century , computers would be conversing with us at work and robots would be performing our house-work. But as useful as computers are, they're nowhere close to achieving anything remotely resembling these early aspirations for human like behavior. Never mind something as complex as conversation : the most powerful computers struggle to reliably recognize the shape of an object, the most elementary of tasks for a ten-month-old kid.
A growing group of AI researchers think they know where the field went wrong. The problem, the scientists say, is that AI has been trying to separate the highest, most abstract levels of thought, like language and mathematics, and to duplicate them with logical, step-by-step programs. A new movement in AI, on the other hand, takes a closer look at the more roundabout way in which naturally came up with intelligence. Many of these researchers study evolution and natural adaptation instead of formal logic and conventional computer programs. Rather than digital computers and transistors, some want to work with brain cells and proteins. The results of these early efforts are as promising as they are peculiar, and the new nature-based AI movement is slowly but surely moving to the forefront of the field.
Imitating the brain's neural (神经的) network is a huge step in the right direction, says computer scientist and biophysicist Michael Conrad, but it still misses an important aspect of natural intelligence. "People tend to treat the brain as if it were made up of color-coded transistors" , he explains, "but it's not simply a clever network of switches. There are lots of important things going on inside the brain cells themselves. " Specifically, Conrad believes that many of the brain's capabilities stem from the patternrecognition proficiency of the individual molecules that make up each brain cell. The best way to build and artificially intelligent device, he claims, would be to build it around the same sort of molecular skills.
Right now, the option that conventional computers and software are fundamentally incapable of matching the processes that take place in the brain remains controversial. But if it proves true, then the efforts of Conrad and his fellow AI rebels could turn out to be the only game in town.
The author says that the powerful computers of today
A．are capable of reliably recognizing the shape of an object.
B．are close to exhibiting humanlike behavior.
C．are not very different in their performance from those of the 50's.
D．still cannot communicate with people in a human language.
第5题
Which of the following statements is NOT true？
A．The increase in blood masked some of the subtle changes.
B．It took three seconds after an event for the flow of blood to increase to an area of the brain.
C．The body's reaction was like watering the entire garden for the sake of one thirsty flower.
D．Researchers will use new methods to study human brains because of the limit of conventional imaging techniques.
第6题
By citing me example of his music teacher, the author tries to______.
A．reveal underlying problems in current education system
B．prove the necessity of reviving traditional education
C．complain about some educators" abuse of policies
D．explain why the conventional wisdom is wrong
第7题
In the 1950s, the pioneers of artificial intelligence(AI)predicted that, by the end of this century, computers would be conversing with us at work and robots would be performing our house work. But as useful as computers are, they're nowhere close to achieving anything remotely resembling these early aspirations for humanlike behavior. Never mind something as complex as conversation: the most powerful computers struggle to reliably recognize the shape of and object, the most elementary of tasks for a ten-month-old kid.
A growing group of AI researchers think they know where the field went wrong. The problem, the scientists say, is that AI has been trying to separate the highest, most abstract levels of thought, like language and mathematics, and to duplicate them with logical, step-by-step pro grams. A new movement in AI, on the other hand, takes a closer look at the more roundabout way in which nature came up with intelligence. Many of these researchers study evolution and natural adaptation instead of formal logic and conventional computer programs. Rather than digital computers and transistors, some want to work with brain cells and proteins. The results of these early efforts are as promising as they are peculiar , and the new nature-based AI movement is slowly but surely moving to the forefront of the field.
Imitating the brain' s neural (神经的) network is a huge step in the right direction, says computer scientist and biophysicist Michael Conrad, but it still misses an important aspect of natural intelligence. "People tend to treat the brain as if it were made up of color-coded transistors," he explains. "But it's not simply a clever network of switches. There are lost of important things going on inside the brain cells themselves. "Specifically, Conrad believes that many of the brain's capabilities stem from the pattern-recognition proficiency of the individual molecules that make up each brain cell. The best way to build an artificially intelligent device, he claims, would be to build it around the same sort of molecular skills.
Right now, the notion that conventional computers and software are fundamentally incapable of matching the processes that take place in the brain remains controversial. But if it proves true, then the efforts of Conrad and his fellow Al rebels could turn out to be the only game in town.
The author says that the powerful computers of today ______.
A．are capable of reliably recognizing the shape of an object
B．are close to exhibiting humanlike behavior
C．are not very different in their performance from those of the 50's
D．still cannot communicate with people in a human language
第8题
Preparing for Computer Disasters
Fires，power surges，and floods，they're all facts of life.We read about them in the morning paper and see them on the evening news．We sympathize with the victims and commiserate over their bad luck．We also shake our heads at the digital consequences-melted computers，system failures，destroyed data.Yet，somehow，many of us continue to live by that old mantra of denial：“It won't happen to me．”Well，the truth is，at some point you'll probably have to deal with at least one disaster．That's just how it goes，and in most aspects of our lives we do something about it．We buy insurance．We stow away provisions．We even make disaster plans and run drills．But for some reason，computer disaster recovery is a blind spot for many of us．It shouldn't be．Home computers contain some of our most important information，both business and personal，and making certain our data survives a disaster should be a priority．Moreover，even the smallest disaster can be a serious disruption．Personal computers have become an integral part of the smooth-running household. We use them to communicate, shop, and do homework, and they're even more vital to home office users. When home office computers go down, many small businesses grind to a halt. Fortunately, taking steps to recover from disasters and minimize their effects is quite straightforward. With a good offsite storage plan and the right tools, you can bounce back quickly and easily from minor computer disasters. And, should a major calamity strike, you can rest assured your data is safe.
Offsite Storage: Major Disasters
House fires and floods are among the most devastating causes of personal computer destruction. That's why a solid offsite backup and recovery plan is essential. Although many home users faithfully back up their hard drives, many would still lose all their data should their houses flood or burn. That's because they keep their backups in relatively close to their computers. Their backup disks might not be in the same room as their computers-tucked away in a closet or even the garage-but they're not nearly far enough away should a serious disaster strike. So, it's important to back up your system to a removable medium and to store it elsewhere.
There are many ways to approach offsite storage. It starts with choice of backup tools and storage medium. Disaster situations are stressful, and your recovery tools shouldn't add to that stress. They must be dependable and intuitive, making it easy to schedule regular backups and to retrieve files in a pinch. They must also be compatible with your choice of backup medium. Depending on your tools, you can back up to a variety of durable disk types--from CDs to Jaz drives to remote network servers. Although many of these storage media have high capacity, a backup tool with compression capabilities is a big plus, eliminating the inconvenience of multiple disks or large uploads.
Once you select your tools and a suitable medium, you need to find a remote place to store your backups. The options are endless. However, no matter where you choose, be sure the site is secure, easily accessible, and a good distance away from your home. You may also want to consider using an Internet-based backup service. More and more service providers are offering storage space on their servers, and uploading files to a remote location has become an attractive alternative to conventional offsite storage. Of course, before using one of these services, make certain you completely trust the service provider and its security methods. Whatever you do, schedule backups regularly and store them far away from your home.
Come What May: Handling the Garden Variety Computer Crisis
Not all home computer damage results from physical disaster. Many less menacing problems can also hobble your PC or destroy your information. Systems crash, kids "rearrange" data, ad
A．take steps to recover from them
B．call the computer company
C．buy insurance
D．stow away provision
第9题
听力原文：(A) They're standing in a line.
(B) They're studying a map.
(C) They're buying some magazines.
(D) They're looking at the same book.
A．
B．
C．
D．
第10题
听力原文：(A) They're signing some forms.
(B) They're standing next to the sign.
(C) They're putting up signs.
(D) A man is pointing into the distance.
