Did you hear of the supercomputer? Recently, China’s Tianhe-1 (天河一号) was ranked as the world’s fastest supercomputer, according to a new list of world’s TOP 500 supercomputers.
It took 200 Chinese scientists two years to build the fastest supercomputer. It can do 2,507 trillion (万亿次) calculations in a second! That means it will take a personal computer 600 years to finish the work that a supercomputer does in a day!
The US now leads the world in the area of supercomputers. It is home to more than half of the world’s top 500 supercomputers. Japan also has advanced technology. China is developing its supercomputer technology quickly. But experts say it will take years before China’s total computing power can catch up with that of the US.
Supercomputers can work on many different things. They can solve problems in areas like national defense (国防), energy and science. In business, you can also use supercomputers. Oil companies use them to find oil and gas. Banks use them for quick trades. Food companies even use supercomputers to make sure that they put potato chips into cans without breaking them.
To make a supercomputer, scientists first need to link (连接) thousands of small computers together. Then they use software to turn them into one supercomputer. In fact, any person with enough knowledge about computers can make a supercomputer. But you need the top technology to make a supercomputer run fast.The world’s fastest supercomputer ________.
| A．was made in America |
| B．was made within two months |
| C．can do 2,507 trillion calculations in a minute |
| D．was made by 200 Chinese scientists |
Among the world’s top 500 supercomputers, ________ of them are made in the US.
| A．less than 20% | B．more than 50% |
| C．less than 50% | D．more than 20% |
The main idea of the fourth paragraph is ________.
| A．supercomputers can be used in different kinds of areas |
| B．supercomputers can work fast |
| C．supercomputers can only be used to find oil and gas |
| D．supercomputers can be used to make money |
According to the passage, to make a supercomputer, ________.
| A．you needn’t know enough knowledge about computers |
| B．you need to know how to play computer games |
| C．scientists first need to link thousands of small computers together |
| D．scientists first need to make some software |
Which of the following is true?
| A．A personal computer needs 300 years to finish the work that a supercomputer does in a day. |
| B．Japan now leads the world in the area of supercomputers. |
| C．Supercomputer can be used by food companies. |
| D．Scientists needn’t use software to turn small companies into one supercomputer. |
阅读下面短文，从每题所给的四个选项（A、B、和C）中，选出最佳选项。
This is Paul and Ben．They are twins(双胞胎)．They are twelve．This is their bedroom．It’s a nice room．There are two beds in the room．The yellow bed is Paul’s and that green one is Ben’s．T he twins have one desk and two chairs．The chairs look the same．Paul’s sweater is on his bed． Ben’s coat is on his chair．Their clock, books and pencil-cases are on the desk．Their school bags are behind the chairs．Paul and Ben are ________．
A． friends
B． brothers
C． sistersPaul and Ben have ________．
A． two chairs and one desk
B． two desks and one chair
C． two chairs and two desksPaul’s ________ is yellow and Ben’s ________ is green．
A． chair; bed
B． sweater; sweater
C． bed; bedPaul’s sweater is ________．
A． on his bed
B． on Ben’s bed
C． on the chairWhich is right（正确的）?
A． They are in the same room．
B． Their two beds look the same．
C． Their school bags are under the chairs．
Kenya, a country in East Africa, is known for its amazing wildlife, especially lions. However, over the last decade (十年) the number of lions has decreased from 10,000 to over 2,000. Most of them were killed by the local people because they had to do so to protect their cows.
As well as the cows, wild animals should be protected. Now because of a creative idea thought of by a young boy, this problem can be solved peacefully.
At the age of 11, Richard Turere was put in charge of the family’s cows. The local people think this job is an honor since cows are considered the family fortune.
The only problem was that their land was next to Nairobi National Park, home to the largest number of lions in the world. As a result, the cows were often eaten by the hungry lions.
Richard noticed that when he walked around the cows with a flashlight, the lions kept away because they were afraid of humans and the flashlight. So he decided to create an automated (自动的) flashlight. Richard tied some bulbs (灯泡) from broken flashlights around the cow stockade (栅栏). Under an automated lighting system, the bulbs flashed one by one, just like someone walking around with a flashlight that could keep lions away.
Since Richard’s invention was put to use, none of Richard’s cows has lost. As it only costs $10 to make this simple device, it can be widely used in Kenya in the future.How many lions died during the last decade?
A. About 2,000.
B. About 8,000.
C. About 10,000.What does the “so” in paragraph one refer to?
A. Over the last decade (十年) the number of lions has decreased from 10,000 to over 2,000
B. the local people killed the lions.
C. the local people killed the cows.Richard wanted to make an automated flashlight because .
A. he wanted to became famous
B. he had lots of broken flashlights
C. he found lions were afraid of humans and flashlightsHow did the automated flashlight drive lions away?
A. Its bulbs flashed one by one.
B. All the bulbs flashed at the same time.
C. By producing strong light that could kill lions.What is the best title of the passage?
A. The lions and cows in Kenya
B. How were the bulbs invented?
C. How was an automated flashlight created?
Do you have sleeping problems? Is it hard for you to remember or pay attention in class? Do you easily get angry? If your answer is yes, you may be under stress.
Stress is a normal physical response (反应) to things that make people feel worried. In China, 70 percent of the 2,000 students about to take the college or high school entrance examination are under high stress, according to a recent survey by Wuhan University of Hubei province.
Sometimes stress is good for people. It pushes people to do their best, like while getting ready before a big competition or exam. However, too much or long-term stress makes people feel a stress overload (负荷过多), and affects people’s health.
When you feel stressed, there are some ways you can deal with (处理) it. Learning to solve small problems in everyday life is helpful. It can help build confidence to move on to life’s bigger ones. Try saying positive things to yourself, like “I will do the best that I can,” or “I can manage this if I take one step at a time.” That encourages you to work toward your goal. It is also important to relax sometimes.
But if you are under high stress and can’t handle it by yourself, it is also good to ask parents or friends for help. Everyone has stress. Don’t be too shy to tell others that you are having a hard time. They may comfort you or give you some useful advice. You may feel better just from sharing your problems with them.You may be under stress if you are in the following situation EXCEPT___.
A. you get angry easily
B. you can’t get up in the morning.
C. you can’t pay attention in class.Who did a survey about stress in middle school students recently?
A. Wuhan University
B. Hubei University
C. Wuhan Technology UniversityIn what way is stress good for people?
A. it can keep people wake at night.
B. it makes people do well in exams.
C. it pushes people to do their best.How many ways of dealing with stress are discussed in the passage?
A.2 B. 3 C.4Why should we ask parents or friends for help if we are under high stress?
A. because they can solve our problems.
B. because they must give us useful advice.
C. because sharing our problems can make us feel better.
The universal two-child policy(政策) will possibly add about 2.5 million newborn babies every year, said a professor of Peking University. According to a statement made on Thursday by the Chinese government, about 90 million couples will be able to have a second child.
The universal two-child policy will tell us the country's aging trend and if no action is taken to change this situation, there will be labor shortages in the future because of the low birth rate in recent years. Low birth rate means less adults of working age, which will cause some danger for our country’s development and the future of us.
However, before the new policy was made, the one-child policy influenced Chinese people for a long time. It was put forward in the 1970s aimed at slowing the fast population growth caused by a baby boom (爆炸)after the country recovered from three years of natural disasters in the early 1960s. Besides, with the only child becoming the center of a family, the child may be too spoiled, which can be seen in many news reported nowadays. Still, if the only child dies before his parents, it's hard to imagine how the parents will spend the rest of their lives, especially when they are old.
In late 2013, the government first relaxed the family planning policy, allowing couples to have a second child in situations where one spouse was an only child. However, as of June, only 1.5 million of the 11 million couples had decided to have a second child.
"This policy change could have a good influence on our society, and it will help to develop the economy in our country, but any such influence can only appear over the long term," Atsi Sheth, an director of Moody’s, said in a report on Friday.How many newborn babies may be added in two years after the two-child policy?
A. 2.5 million
B. 1.5 million
C. 5millionThe following are the influences of low birth rate EXCEPT_____
A. There will be labor shortages.
B. There will be more adults of working age.
C. It will cause some danger to our country’s development.How long did the one-child policy last for?
A. About 35 years
B. about 45years
C. about 55yearsWhy should we stop the one-child policy?
A. Because the parents may spend the rest of their lives to raise the only child.
B. Because the only child will become the center of the family and be spoiled.
C. Because it will cause the labor shortage.When did the government completely relax the family planning policy?
A. In 2013 B. In 2014 C. In 2015
| Monday |
10:30～11:00am |
visit Uncle Peter in General Hospital |
| Tuesday |
2:00～4:00pm |
swimming class |
| Wednesday |
12:00～6:00pm |
part-time job (业余工作) |
| Thursday |
10:30～11:30am |
Appointment (约会) Mr. Green |
| 12:00～5:00pm |
Free |
|
| Friday |
11:00am |
go to the airport to meet Sam |
| Saturday |
10:00～12:00am |
Meet Dave to study for test |
| Sunday |
5:00～7:00pm |
Birthday party for Kate |
阅读John的日程表，选择正确答案。__________ is ill in hospital.
A. Kate B. Peter C. JohnJohn does his part-time job for _________ hours a week.
A. five B. six C. tenKate’s birthday is from _________ to _________.
A. 2:00, 4:00pm B. 5:00, 7:00pm C. 12:00, 5:00