China’s Tianhe-1 has a computing speed of 2,5...

China’s Tianhe-1 has a computing speed of 2,507 trillion（万亿）calculations a second, making it the fastest computer in the world．It is also 40 percent faster than the world’s second fastest supercomputer, Cray XT5 Jaguar, in the US, kept at a national laboratory in Tennessee, according to the New York Times．Jack Dongarra, a University of Tennessee computer scientist, told NYT that the Chinese supercomputer is faster than the existing Number One machine.

Building the fastest supercomputer has become a source of national pride, as these machines are valued for their ability to solve problems in areas like defense, energy and science．These problems are related to national interests．Supercomputing technology is also found in business．Oil and gas companies use supercomputers to find oil and gas．

Obviously, research centers with large supercomputers attract top scientific talents．This adds extra importance to the machines—they’re more than just huge computers．

China’s new supercomputer will be used to speed up greatly scientific calculations, such as hurricane and tsunami modeling, cancer research, car design and even studying stars.

In 2008, two US scientists put together a step-by-step guide on how to build a supercomputer using PlayStation 3 video-game consoles（控制台）．Modern supercomputers are built by combining thousands of small computer servers（服务器）and using software to turn them into one large computer．Really, any organization with enough material and technology can create a fast machine．

The Chinese system follows that model by linking thousands upon thousands of computer servers．But the secret behind the system—and the technological achievement—is China’s own networking technology．“That technology was built by them,” Dongarra said．“They are taking supercomputing very seriously and using a lot of time and money.”

“China is still a developing country,” said Sha Chaoqun, manager at Dawning Company which is the leading supercomputer maker in China．“Maybe one day, China’s total computing power can be greater than that of the US, but there is still a long way to go before we get there.”

高二英语其他题困难题查看答案及解析

China’s Tianhe-1 has a computing speed of 2,507 trillion（万亿）calculations a second, making it the fastest computer in the world. It is also 40 percent faster than the world’s second fastest supercomputer, Cray XT5 Jaguar, in the US, kept at a national laboratory in Tennessee, according to the New York Times. Jack Dongarra, a University of Tennessee computer scientist, told NYT that the Chinese supercomputer is faster than the existing Number One machine.

Building the fastest supercomputer has become a source of national pride, as these machines are valued for their ability to solve problems in areas like defense, energy and science. These problems are related to national interests. Supercomputing technology is also found in business. Oil and gas companies use supercomputers to find oil and gas.

Obviously, research centers with large supercomputers attract top scientific talents. This adds extra importance to the machines—they’re more than just huge computers.

China’s new supercomputer will be used to speed up greatly scientific calculations, such as hurricane and tsunami modeling, cancer research, car design and even studying stars.

In 2008, two US scientists put together a step-by-step guide on how to build a supercomputer using PlayStation 3 video-game consoles（控制台）. Modern supercomputers are built by combining thousands of small computer servers（服务器）and using software to turn them into one large computer. Really, any organization with enough material and technology can create a fast machine.

The Chinese system follows that model by linking thousands upon thousands of computer servers. But the secret behind the system—and the technological achievement—is China’s own networking technology. “That technology was built by them,” Dongarra said. “They are taking supercomputing very seriously and using a lot of time and money.”

“China is still a developing country,” said Sha Chaoqun, manager at Dawning Company which is the leading supercomputer maker in China. “Maybe one day, China’s total computing power can be greater than that of the US, but there is still a long way to go before we get there.”

高二英语其他题中等难度题查看答案及解析

任务型阅读(共10小题,每题1分，满分10分)

请认真阅读下列短文，并根据所读内容在文章后表格中的空格里填入最恰当的单词。

注意：每个空格填1个单词。

China’s Tianhe-1 has a computing speed of 2,507 trillion（万亿）calculations a second, making it the fastest computer in the world. It is also 40 percent faster than the world’s second fastest supercomputer, Cray XT5 Jaguar, in the US, kept at a national laboratory in Tennessee, according to the New York Times. Jack Dongarra, a University of Tennessee computer scientist, told NYT that the Chinese supercomputer is faster than the existing Number One machine.

Building the fastest supercomputer has become a source of national pride, as these machines are valued for their ability to solve problems in areas like defense, energy and science. These problems are related to national interests. Supercomputing technology is also found in business. Oil and gas companies use supercomputers to find oil and gas.

Obviously, research centers with large supercomputers attract top scientific talents. This adds extra importance to the machines—they’re more than just huge computers.

China’s new supercomputer will be used to speed up greatly scientific calculations, such as hurricane and tsunami modeling, cancer research, car design and even studying stars.

In 2008, two US scientists put together a step-by-step guide on how to build a supercomputer using PlayStation 3 video-game consoles（控制台）. Modern supercomputers are built by combining thousands of small computer servers（服务器）and using software to turn them into one large computer. Really, any organization with enough material and technology can create a fast machine.

The Chinese system follows that model by linking thousands upon thousands of computer servers. But the secret behind the system—and the technological achievement—is China’s own networking technology. “That technology was built by them,” Dongarra said. “They are taking supercomputing very seriously and using a lot of time and money.”

“China is still a developing country,” said Sha Chaoqun, manager at Dawning Company which is the leading supercomputer maker in China. “Maybe one day, China’s total computing power can be greater than that of the US, but there is still a long way to go before we get there.”

高二英语填空题中等难度题查看答案及解析

5G technology will ______ 15.2 trillion yuan _______ China’s digital industry between 2020 and 2025, Science and Technology Daily reported on August 28.

A.contribute, to B.adjust, to C.leave, behind D.balance, against

高二英语单项填空简单题查看答案及解析

－It’s necessary to limit the speed of electric bikes.

－Yes, most riders of electric bikes in China ________ 40-50 kilometers per hour often ignore red lights, ________ the risk of traffic accidents.

A. reaching; increase               B. reach; increase

C. to reach; to increase                D. reaching; increasing

高二英语单项填空困难题查看答案及解析

Though its economy is speeding fast, China's average family income is far below ________ of the developed countries.

A. it                B. that                C. one                D. those

高二英语单项填空中等难度题查看答案及解析

China will build 16,000 km of high-speed railway by 2020, with trains _______ 350 km/h.

A. running as fast as     B. run as fast as   C. runs as quickly as   D. run as quickly as

高二英语单项填空中等难度题查看答案及解析

For busy people, the idea of speed dating has really caught on in popularity. In a speed dating event, usually 8-10 __66__ go around from table to table, each spending 6-8 minutes at each one. From that, you may not know for sure if you want to __67__ something more with an individual, but, you will __68__ know if you don't want to.

The first thing that you will realize about speed dating is that it makes you __69__. Unlike a bar, where you might get a whole evening to __70__ check a potential partner out and to see what they’ve got, when it comes to __71__, you know that you only have a certain amount of time to put your best foot forward there. You’ll find the other participants are __72__ of this and will put their best foot forward.

An 8-minute speed dating will also give you a chance to see how someone __73__ under pressure. You may already know a little more about their __74__ if you find someone who can’t seem to make eye-contact. The best advice is to make eye contact, be open and direct. You’ll find that the __75__ time can make for some excellent opportunities to really shine, and there’s nothing like a deadline to make you more __76__! An important detail to keep in mind is that you will be __77__ to a dozen or more singles in a short time. Those who feel that there is an advantage in larger numbers will surely find this __78__.

When you are looking for __79__, you may not want to do the long search, so think about speed dating and see what you can do to make sure that it works for you. __80__, give this exciting opportunity a try!

1.

A. lovers             B. couples                 C youths                  D. singles

2.

A. learn            B. have                   C. explore                 D. develop

3.

A. equally         B. hardly                  C. definitely                D. eventually

4.

A. chase           B. hurry                    C. focus                  D. cheer

5.

A. constantly    B. frequently              C. occasionally              D. unexpectedly

6.

A. making friends          B. speed dating    C. family planning         D. home improving

7.

A. sick           B. fond          C. aware                D. confident

8.

A. acts            B. talks                   C. lives                   D. loves

9.

A. interest               B. background             C. intention               D. personality

10.

A. spare           B. limited        C. appointed             D. luxurious

11.

A. creative              B. passive                 C. negative               D. objective

12.

A. introduced            B. devoted                 C. mentioned            D. used

13.

A. demanding      B. surprising               C. convincing     D. appealing

14.

A. fun          B. love                   C. friendship              D. adventure

15.

A. In a word        B. As a result               C. On the whole           D. Believe it or not

高二英语完型填空简单题查看答案及解析

For those who make journeys across the world, the speed of travel today has turned the countries into a series of villages. Distances between them appear no greater to a modern traveler than those which once faced men as they walked from village to village. Jet plane fly people from one end of the earth to the other, allowing them a freedom of movement undreamt of a hundred years ago.

Yet some people wonder if the revolution in travel has gone too far. A price has been paid, they say, for the conquest (征服) of time and distance. Travel is something to be enjoyed, not endured . The boat offers leisure and time enough to appreciate the ever-changing sights and sounds of a journey. A journey by train also has a special charm about it. Lakes and forests and wild, open plains sweeping past your carriage window create a grand view in which time and distance mean nothing. On board a plane, however, there is just the blank blue of the sky filling the narrow window of the airplane. The soft lighting, in-flight films and gentle music make up the only world you know, and the hours progress slowly.

Then there is the time spent being “processed” at a modern airport. People are conveyed like robots along walkways; baggage is weighed, tickets produced, examined and produced yet again before the passengers move again to another waiting area. Journeys by rail and sea take longer, yes, but the hours devoted to being “processed” at departure and arrival in airports are luckily absent. No wonder, then, that the modern high-speed trains are winning back passengers from the airlines.

Man, however, is now a world traveler and can not turn his back on the airplane. The working lives of too many people depend upon it; whole new industries have been built around its design and operation. The holiday maker, too, with limited time to spend, patiently endures the busy airports and limited space of the flight to gain those extra hours and even days, relaxing in the sun. Speed controls people’s lives; time saved, in work or play, is the important thing—or so we are told. Perhaps those first horsemen, riding free across the wild, open plains, were enjoying a better world than the one we know today. They could travel at will, and the clock was not their master.

1.What does the writer try to express in Paragraph1?

A. Travel by plane has speeded up the growth of villages．

B. The speed of modern travel has made distances relatively short．

C. The freedom of movement has helped people realize their dreams．

D. Man has been fond of travelling rather than staying in one place．

2.How does the writer support the underlined statement in Paragraph2?

A. By giving instructions.

B. By analyzing cause and effect.

C. By following the order of time.

D. By giving examples.

3.According to Paragraph 3, passengers are turning back to modern high-speed trains because______．

A. they pay less for the tickets

B. they feel safer during the travel

C. they can enjoy higher speed of travel

D. they don’t have to be “processed”

4.What is the main idea of the passage?

A. Air travel benefits people and industries．

B. Train Travel has some advantages over air travel．

C. Great changes have taken place in modern travel.

D. The high speed of air travel is gained at a cost.

高二英语阅读理解中等难度题查看答案及解析

Tips of Avoiding the Computer or Internet Addiction

The Internet has been widely used in recent years. It is a convenient way to share information, do business and contact others. 1. Getting rid of the addiction requires discipline and commitment. Here are some steps that may help your kids to overcome the Internet addiction.

First, you should try to find out just how much time your kids are spending online. Track the information for a few weeks and try to separate time spent on homework or research and time spent playing. Compare this to the amount of time spent with friends, at clubs, in activities and for hobbies. 2.

3. In my house, the family computer sits in the living room. At no time is someone allowed to be “behind closed doors” with a computer. Not only does this help honest people stay honest, but it helps to connect to your teens when they are online. Besides, it is easier to monitor your teens’ time online.

4. Don’t speak of the fact that they are online all the time, but try to get to the root cause. Often someone gets online because he/she feels safe there. Talk to your teens about what is going on in their life. If they will not talk to you, then find a way to connect your teens to the people they contact in real life.

Lastly, remember that if an Internet addiction is growing, your kids need help. In many cases, the Internet is a safe place for people with poor self-esteem, negative self-image, or for people who have been hurt. 5.

If there is a problem, and a person needs help, these symptoms will continue to worsen until they get help.

A. If things are out of balance, try to correct them.

B. There are some disadvantages of getting online.

C. Second, move computers out of your children’s rooms.

D. It is a good idea to contact the teacher for help if possible.

E. Also, if your kids spend too much time online, talk to them.

F. Unfortunately, some people develop an addiction to the Internet.

G. It is the same with people with eating disorders or drug addictions.

高二英语七选五中等难度题查看答案及解析