BEIJING - By the end of 2011 China-made supercomputers will say goodbye to foreign microchips(微芯片) and start using their own "Chinese core(核心)", according to one of the country's leading scientists, Hu Weiwu.
Hu told reporters on Saturday that the "Dawning 6000" supercomputer, developed by the Institute of Computing Technology of CAS and the Dawning Information Industry Company (DIIC), will adopt Loongson microchips for the first time as its core parts. It will have a computing speed of more than 1,000 trillion operations a second.
Making supercomputers with Chinese microchips is one of the nation's major science and technology projects. Three organizations - the Institute of Computing Technology of CAS, Jiangnan Institute of Computing Technology and the National University of Defense Technology (NUDT) - have their own supercomputer projects.
According to their schedules, all three institutions will need to meet the target of using domestically(国内的) developed microchips by the end of this year. Hu said the new supercomputer will use fewer than 10,000 Loongson microchips, and will also be more energy-efficient.
Tianhe-1A, developed by NUDT in Hunan's provincial capital Changsha, is the fastest supercomputer in the world. However, Tianhe-1A largely runs on 14,336 CPUs made by Intel, and 7,186 GPUs (processing units) from Nvidia, two US chip-makers.
Hu said there will be difficulties ahead as there is little affiliated equipment specially developed for these supercomputers. "We have enough supercomputers in China but still can't make full use of them," He said.
Hu added that although the China-made CPUs have improved since they were first produced in 2002, they have a long way to go to compete with US chip-makers such as Intel.
【小题1】What’s the best title for this passage?
A.The Arrival of Chinese Supercomputers |
B.Homemade CPUs with a Long Way to Go |
C.The Supercomputers of Three Organizations in China |
D.Homemade CPUs on the Way for Local Supercomputers |
A.Dawning 6000 | B.Loongson microchips |
C.DIIC | D.Tianhe-1A |
A.cheap | B.suitable | C.expensive | D.modern |
【小题1】D
【小题2】B
【小题3】A
【小题4】B
解析试题分析:国产超级计算机将对外国芯片说再见而采取国产芯片同时还介绍了国产芯片研发和超级计算机的一些相关信息。
【小题1】D 主旨大意题。由文章第一段可知。本文讲述的是国产的超级计算机将采用国产的芯片以及国产芯片研发和超级计算机的一些相关信息,选项B未能提及关键词supercomputers。故D正确。
【小题2】B 推理题。由第二段adopt Loongson microchips for the first time as its core parts. It will have a computing speed of more than 1,000 trillion operations a second.可知提高运算速度的是Loongson microchips。
【小题3】A推理题。由倒数第三段“Nvidia, two US chip-makers.”可知。选项C主语应该是the new supercomputer而不是Tianhe-1A。
【小题4】 B 猜词题。“附属的”。由“specially developed for these supercomputers”可知该词表示的是B项含义。
考点:考察科普类短文阅读
科目:高中英语 来源: 题型:阅读理解
Statistically, air travel is by far the safest way to travel, and you can make flying even safer, just by following these simple rules. As your chances of being involved in an air accident are practically nil (零), many of these tips concern what you should and shouldn't do to make your journey safer when you are airborne (升空的).
Fly on non-stop routes
Most accidents occur during the takeoff, climb, descent and landing phases of a flight, so flying non-stop reduces your exposure to these complex procedures.
Choose larger aircraft.
Although small aircraft have very good safety records, those with more than 30 passenger seats are designed to comply (遵守) with much stricter regulations and are tested more regularly to make sure they still comply. Also, in the unlikely event of a serious accident, larger aircraft provide a better opportunity for passenger survival.
Pay attention to the pre-flight safety briefing
The information may seem repetitious , but it's worth listening to the flight attendants. And even if you've flown before, it doesn't mean you know everything about the aircraft you're on, such as the location of the closest emergency exit.
Store things safely
Never put very heavy articles in the overhead storage bins. They may fall out when someone opens the bin and cause injury. Also, the bin may not be able to hold heavier objects during turbulence (气流).
Keep our seat belt fastened while you are seated
Cabin crew always tell you this, but it's important. You would be seriously injured if the plane hits unexpected turbulence. Always fasten your seat belt if you are told to. The general rule of flying is this: If you are told to do something, do it first and ask questions later.
Let the flight attendant pour your hot drinks
Flight attendants are trained to handle hot drinks like coffee or tea in a crowded aisle on a moving aircraft, so allow them to pour the drink and hand it to you. Never ask to take a coffee pot from one of them.
【小题1】What is the overall reason for these air safety tips?
A.What to do in the event of a crash. |
B.How to avoid turbulence. |
C.How to improve safety while you are flying. |
D.How to avoid injury. |
A.smaller planes | B.passengers | C.larger aircraft | D.safety records |
A.anything the flight staff tell you to do |
B.general safety advice |
C.walking around the plane |
D.pouring hot drinks |
A.Larger planes have more safety checks and are safe in an accident. |
B.Take-offs are safer on non-stop flights than landings. |
C.Every aircraft is different, so the safety procedures may be different. |
D.Seat belts should be worn to protect against turbulence. |
A.The Safest Way to Travel | B.Air Safety Tips |
C.Non-stop Routes | D.How to Fly a Plane |
查看答案和解析>>
科目:高中英语 来源: 题型:阅读理解
You have some great ideas. But they don’t come out because of what your friends say or because you think that only a few people can be creative geniuses(天才). And, you, of course, think that you couldn’t be one of them. But actually, this is not true at all.
Anyone who is a creative genius will tell you that creativity is very much like a muscle that needs to be developed. If you don’t learn how to develop creative thinking, this skill, just like a muscle, will become poor and useless. On the other hand, keep working at it, and this skill will soon be ready for action whenever you need it. So how do you develop your own personal style of creative thinking?
You should realize that your brain has a greater capacity (容量) and a higher speed than the world’s biggest and fastest computer. So it’s important to get as much information as you can every day. Read, watch and listen to everything around you —good and bad. The more you know, the more you’ll want to know, and the more your brain will be exercised.
Try something new every day and let your experiences show you more about the world and people around you. You need to step out of your comfort zone (舒适地带) more and more each day.
Follow these suggestions, and begin thinking beyond your "limits" from today. You’ll soon have a life full of interesting and exciting adventures. Who knows, your idea might be the next great idea to change the world.
【小题1】Most people can’t be creative geniuses because they _______.
A.don’t have great ideas |
B.don’t want to develop their ideas |
C.are too shy to talk about their ideas |
D.don’t believe they can be |
A.creative thinking | B.the muscle | C.personal style | D.great capacity |
A.No computer can store as much information as human’s brain. |
B.It is not necessary to remember everything around you. |
C.Try something new, as long as you are comfortable with it. |
D.It is harder to exercise the brain than the muscles |
A.how they can learn from creative geniuses |
B.about ways to develop their creative thinking |
C.about the importance of exercising the muscles |
D.the reasons why they can’t be creative geniuses |
查看答案和解析>>
科目:高中英语 来源: 题型:阅读理解
Hu Li's heart sank due to the color of the air.Driving 140 kilometers from Tianjin City to Beijing last week,she held her breath as the air became a charcoal grey haze(炭灰色的阴霾).The 39yearold businesswoman has lived in Beijing for a decade,and this past month,she said,brought the worst air pollution she has ever seen.It gave her husband a cough and left her sevenyearold daughter housebound(足不出户).“My husband as well as I is working here,so we have no choice,” she said.“But if we had a choice,we'd like to escape from Beijing.”
The extended heavy pollution over the last month,which caused punishment in return for a day last week-called the “airpocalypse” by internet users- has largely changed the way that Chinese think about the country's air.On one day,pollution levels were 30 times higher than levels considered safe by the World Health Organization (WHO).Flights were cancelled.Roads were closed.One hospital in east Beijing reported they had treated more than 900 children for breathing issues.Bloomberg found that for most of January,Beijing's air was worse than that of an airport smoking area.
The smog's(烟雾) most threatening aspect is its high concentration(浓度) of PM 2.5 - particulate matter that is small enough to breathe deep into the lungs and enter the bloodstream,causing breathing infections,lung cancer and possibly damaging children's development.The WHO has estimated that outdoor air pollution accounts for two million deaths per year,65% of them in Asia.
【小题1】Which conclusion can we draw from the first paragraph?
A.Hu Li is living in Beijing. |
B.Hu Li traveled to Tianjin for business. |
C.The haze is harmful to people. |
D.The pollution is the worst in Beijing's history. |
A.the way they traveled |
B.the opinion about national air |
C.the way they lived their life |
D.the life style of internet |
A.can lead to choke |
B.can cause heart cancer |
C.will damage children's development |
D.will damage people's organ |
A.Hu Li's attitudes to Beijing's haze |
B.The damages of Beijing's haze |
C.WHO suggests improving Beijing's air |
D.What caused air pollution in Beijing |
查看答案和解析>>
科目:高中英语 来源: 题型:阅读理解
(2013·高考四川卷,E)Fear may be felt in the heart as well as in the head,according to a study that has found a link between the cycles of a beating heart and the chance of someone feeling fear.
Tests on healthy volunteers found that they were more likely to feel a sense of fear at the moment when their hearts are contracting(收缩) and pumping blood around their bodies,compared with the point when the heartbeat is relaxed.Scientists say the results suggest that the heart is able to influence how the brain responds to a fearful event,depending on which point it is at in its regular cycle of contraction and relaxation.
Sarah Garfinkel at the Brighton and Sussex Medical School said:“Our study shows for the first time that the way in which we deal with fear is different depending on when we see fearful pictures in relation to our heart.”
The study tested 20 healthy volunteers on their reactions to fear as they were shown pictures of fearful faces.Dr Garfinkel said,“The study showed that fearful faces are better noticed when the heart is pumping than when it is relaxed.Thus our hearts can also affect what we see and what we don’t see-and guide whether we see fear.”
To further understand this relationship,the scientists also used a brain scanner(扫描仪) to show how the brain influences the way the heart changes a person’s feeling of fear.
“We have found an important mechanism by which the heart and brain ‘speak’to each other to change our feelings and reduce fear,”Dr Garfinkel said.
“We hope that by increasing our understanding about how fear is dealt with and ways that it could be reduced,we may be able to develop more successful treatments for anxiety disorders,and also for those who may be suffering from serious stress disorder.”
【小题1】What is the finding of the study?
A.One’s heart affects how he feels fear. |
B.Fear is a result of one’s relaxed heartbeat. |
C.Fear has something to do with one’s health. |
D.One’s fast heartbeats are likely to cause fear. |
A.volunteers’ heartbeats when they saw terrible pictures |
B.the time volunteers saw fearful pictures and their health conditions |
C.volunteers’ reactions to horrible pictures and data from their brain scans |
D.different pictures shown to volunteers and their heartbrain communication |
A.Order. | B.System. |
C.Machine. | D.Treatment. |
A.treating anxiety and stress better |
B.explaining the cycle of fear and anxiety |
C.finding the key to the heartbrain communication |
D.understanding different fears in our hearts and heads |
查看答案和解析>>
科目:高中英语 来源: 题型:阅读理解
The first flights of the new airlines that will take tourists into space are ready to take off in 2012, and getting a seat on one is not all that different from booking a trip someplace on Earth. You can sign up on the website of, say, Virgin Galactic,the most wellknown of the new space tourism companies, or go to an approved travel agency and put down a large deposit. Soon you will be able to buy travel insurance,just as you can for any other vacation.
Until now,space tourism has been limited to the ultrawealthy. Just seven people have paid tens of millions of dollars each for a trip to the International Space Station aboard a Russian rocket.
But that could change this year, when Virgin Galactic intends to start offering flights just beyond the space barrier on a rocket ship it has built, featuring five minutes of weightlessness during a twoandahalfhour tour. At $ 200,000 a seat, this will open the final frontier to far more people.
At least two other specialty airlines have jumped in as well, taking reservations and deposits for future space flights.Allianz, the big insurer, will introduce an insurance product in 2012, lending space tourism the trappings of the regular travel industry.
“Just to be able to sell space travel as a regular part of your business, really, just how cool is that?” said Lynda Turley Garrett, president of Alpine Travel of Saratoga, Calif.,who is one of 58 accredited space agents for Virgin Galactic in the United States.
In five years,Ms.Garrett has sold three seats. But she expects that to change once passengers start going up and coming down to tell their friends. “By 2017,it'll be just like scheduling a flight to L.A.,” Ms.Garrett predicted.
【小题1】If you want to book a flight to space in 2012, you can________.
A.go to any travel agency |
B.telephone Virgin Galactic |
C.pay a visit to Allianz |
D.sign up on the website of Virgin Galactic |
A.only the extremely rich people can afford the space trip |
B.seven people have paid tens of millions of dollars for a space trip |
C.Russia is the first country to build the space station |
D.ordinary people are not allowed to take space tour |
A.It is one of the approved space agencies. |
B.It is a famous space tourism company. |
C.It sells insurance products to space tourists. |
D.Its rocket has carried space passengers successfully. |
A.Standard uniforms. |
B.Traditional decorations. |
C.Symbolic signs. |
D.Personal belongings. |
A.Common. | B.Changeable. |
C.Flexible. | D.Reasonable. |
查看答案和解析>>
科目:高中英语 来源: 题型:阅读理解
A black hole is a place in space where gravity pulls so much that even light cannot get out. The gravity is so strong because matter has been squeezed into a tiny space. This can happen when a star is dying.
Because no light can get out, people can’t see black holes. Space telescopes with special tools can help find black holes. The special tools can see how stars that are very close to black holes act differently from other ones.
Black holes can be big or small. Scientists think the smallest black holes are as small as just one atom. These black holes are very tiny but have the mass of a large mountain. Mass is the amount of matter, or “staff”, in an object.
Another kind of black hole is called “stellar”(星球黑洞). Its mass can be up to 20 times more than the mass of the sun. There may be many stellar mass black holes in Earth’s galaxy. Earth’s galaxy is called the Milky Way.
The largest black holes are called “supermassive”(超大质量黑洞). These black holes have masses that are more than one million suns together. Scientists have found proof that every large galaxy contains a supermassive black hole at its center. The supermassive black hole at the center of the Milky Way galaxy has a mass equal to about four million suns and would fit inside a very large ball that could hold a few million Earths.
Scientists think the smallest black holes formed when the universe began. Stellar black holes are made when the center of a very big star falls in upon itself, or falls apart. When this happens, it exploded part of the star into space. Scientists think supermassive black holes were made at the same time as the galaxy they are in.
A black hole can not be seen because strong gravity pulls all of the light into the middle of the black hole. But scientists can see how the strong gravity affects the stars and gas around the black hole. Scientists can study stars to find out if they are flying around, or orbiting a black hole.
When a black hole and a star are close together, high-energy light is made. This kind of light cannot be seen with human eyes. Scientists use satellites and telescopes in space to see the high-energy light.
【小题1】The gravity of a black hole may become so strong that light cannot get out when ____________.
A.the star is going to die |
B.special tools are used on it |
C.other stars come close to it |
D.it is seen from the space telescopes |
A.A black hole can be very tiny but extremely heavy. |
B.The gravity of a black hole holds all light in its center. |
C.Scientists observe high-energy light through their own eyes. |
D.Some small black holes came into being as early as the universe. |
A.a black hole | B.the Milky Way |
C.a series of stars | D.a planet near the earth |
A.Neither the sun nor the earth is as heavy as a black hole. |
B.There is a supermassive black hole at the center of the Milky Way. |
C.The supermassive black hole had existed before the Milky Way was formed. |
D.There is a reason why the large black holes are called “supermassive”. |
A.what a black hole is |
B.how black holes form |
C.how big black holes are |
D.how scientists know about black holes |
查看答案和解析>>
科目:高中英语 来源: 题型:阅读理解
At the moment, there are two reliable ways to make electricity from sunlight. You can use a panel of solar cells to create the current directly, by liberating electrons from a semiconducting material such as silicon. Or you can concentrate the sun’s rays using mirrors, boil water with them, and employ the steam to drive a generator.
Both work. But both are expensive. Gang Chen of the Massachusetts Institute of Technology and Zhifeng Ren of Boston College therefore propose an alternative. They suggest that a phenomenon called the thermoelectric(热电)effect might be used instead—and they have built a prototype(原型)to show that the idea is practical.
Thermoelectric devices are not new. They are used, for example, to capture waste heat from car engines. They work because certain materials generate an electrical potential difference within themselves if one part is hotter than another. That can be used to drive a current through an external circuit.
The reason thermoelectric materials have not, in the past, been applied successfully to the question of solar power is that to get a worthwhile current you have to have a significant temperature difference. (200℃ is considered a good starting point.) In a car engine, that is easy. For sunlight, however, it means concentrating the heat in some way. And if you are going to the trouble of building mirrors to do that, you might as well go down the steam-generation route, which is a much more efficient way of producing electricity. If the heat concentration could be done without all the equipment of mirrors, though, thermoelectricity’s inefficiency would be balanced by the cheapness of the equipment.
In their view, three things are needed to create a workable solar-thermoelectric device. The first is to make sure that most of the sunlight which falls on it is absorbed, rather than being reflected. The second is to choose a thermoelectric material which conducts heat badly but electricity well. The third is to be certain that the temperature gradient(梯度)which that badly conducting material creates is not wasted by poor design.
【小题1】The following methods can be adopted to make electricity from sunlight EXCEPT .
A.putting a panel of solar cells into use |
B.concentrating sun’s rays with mirrors |
C.creating a solar-thermoelectric device |
D.building a practical solar prototype |
A.Because it’s hard for them to build enough mirrors to make it work. |
B.Because 200℃ was hard to reach at that time even in a car engine. |
C.Because of the failure of having a significant temperature difference. |
D.Because it was hard to focus the sun’s rays with equipment of mirrors. |
A.Thermoelectric Device --- the Best Method of All |
B.A New Method of Making Electricity from Sunlight |
C.How to Create a Workable Thermoelectric Device |
D.Solar Power --- a New Energy Trend in the Future |
查看答案和解析>>
科目:高中英语 来源: 题型:阅读理解
Global warming is causing more than 300,000 deaths and about $125 billion in economic losses each year, according to a report by the Global Humanitarian Forum, an organization led by Kofi Annan, the former United Nations secretary general.
The report, to be released Friday, analyzed data and existing studies of health, disaster, population and economic trends. It found that human-influenced climate change was raising the global death rates from illnesses including malnutrition and heat-related health problems.
But even before its release, the report drew criticism from some experts on climate and risk, who questioned its methods and conclusions. Along with the deaths, the report said that the lives of 325 million people, primarily in poor countries,were being seriously affected by climate change. It projected that the number would double by 2030.
Roger Pielke Jr., a politicalscientist at the University of Colorado, Boulder, who studies disaster trends, said the Forum’s report was “a methodological embarrassment” because there was no way to distinguish deaths or economic losses related to human-driven global warming amid(在...中间) the much larger losses resulting from the growth in populations and economic development in vulnerable(易受伤害的) regions. Dr. Pielke said that “climate change is an important problem requiring our utmost attention.” But the report, he said, “will harm the cause for action on both climate change and disasters because it is so deeply flawed(有瑕疵的).”
However, Soren Andreasen, a social scientist at Dalberg Global Development Partners who supervised the writing of the report, defended it, saying that it was clear that the numbers were rough estimates. He said the report was aimed at world leaders, who will meet in Copenhagen in December to negotiate a new international climate treaty.
In a press release describing the report, Mr. Annan stressed the need for the negotiations to focus on increasing the flow of money from rich to poor regions to help reduce their vulnerability to climate hazards while still controling the emissions of the heat-trapping gases. More than 90% of the human and economic losses from climate change are occurring in poor countries, according to the report.
【小题1】 What is the finding of the Global Humanitarian Forum?
A.Rates of death from illnesses have risen due to global warming. |
B.Global temperatures affect the rate of economic development. |
C.Malnutrition has caused serious health problems in poor countries. |
D.Economic trends have to do withpopulation and natural disasters. |
A.It caused a big stir in developing countries. |
B.It was warmly received by environmentalists. |
C.It caused a lot of interest in the scientific circles. |
D.It was challenged by some climate and risk experts. |
A.Its conclusions are based on carefully collected data. |
B.It is vulnerable to criticism if the statistics are closely examined. |
C.It will give rise to heated discussions at the Copenhagen conference. |
D.Its rough estimates are meant to draw the attention of world leaders. |
A.How human and economic losses from climate change can be reduced. |
B.How rich countries can better help poor regions reduce climate hazards. |
C.How emissions of heat-trapping gases can be reduced on a global scale. |
D.How rich and poor regionscan share responsibility in curbing global warming. |
查看答案和解析>>
湖北省互联网违法和不良信息举报平台 | 网上有害信息举报专区 | 电信诈骗举报专区 | 涉历史虚无主义有害信息举报专区 | 涉企侵权举报专区
违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com