We produce 500 billion of plastic bags in a year worldwide and they are thrown away polluting oceans, killing wildlife and getting dumped in landfills where they take up to 1000 years to decompose. Researchers have been unsuccessfully looking for a solution.
The 16-year old Canadian high school student, Daniel Burd, from Waterloo Collegiate Institute,
has discovered a way to make plastic bags degrade(分解) in as few as 3 months, a finding that won him first prize at the Canada－Wide Science Fair, a $10 000 prize, a $20 000 scholarship, and a chance to revolutionize a major environmental issue.
Burd's strategy was simple: Since plastic does eventually degrade, it must be eaten by microorganisms (微生物). If those microorganisms could be identified, we could put them to work eating the plastic much faster than under normal conditions.
With this goal in mind, he ground plastic bags into a powder and concocted(调制) a solution of household chemicals, yeast(酵母) and tap water to encourage microbes growth. Then he added the plastic powder and let the microbes work their magic for 3 months. Finally, he tested the resulting bacterial culture on plastic bags, exposing one plastic sample to dead bacteria as a control. Sure enough, the plastic exposed to the live bacteria was 17% lighter than the control after six weeks.
The inputs are cheap: maintaining the required temperature takes little energy because microbes produce heat as they work, and the only outputs are water and tiny levels of carbon dioxide.
“Almost every week I have to do chores and when I open the closet door, I have piles of plastic bags falling on top of me. One day, I got tired of it and I wanted to know what other people are doing with these plastic bags. The answer: not much. So I decided to do something myself.” said Daniel Burd.Daniel Burd won first prize at the Canada－Wide Science Fair because________.
| A．he found a new kind of microorganism |
| B．he contributed much to environmental protection |
| C．he found a way to degrade plastics in shorter time |
| D．he could encourage microbes growth in an easier way |
Daniel Burd exposed one plastic sample to dead bacteria to ________.
| A．make the live bacteria work better |
| B．test how effective his method was |
| C．know which bacteria worked faster |
| D．control the temperature in the process |
Maintaining the required temperature takes little energy because ________.
| A．plastics can get hot easily |
| B．microbes can produce heat themselves |
| C．much carbon dioxide is produced |
| D．the temperature can be controlled |
Daniel Burd got his idea from ________.
| A．his school textbook | B．the failure of researchers |
| C．his everyday work | D．the practice of other people |
I have been in Limoges for a month now. since living here, I have tried to integrate(融合) into the local community and one way I have found to do this is by following the local rugby team.
I decided to look for information on the local rugby team after the tourism office could not help me. I searched for the club office online and decided to look into it. The following day I went back to the club after speaking with them and decided to get a season ticket for the rest of my stay here. I will now be going to each home game as well as travelling to the away games with the team and the fans. I am sure that it is going to be a great experience during my time abroad here. I will also be travelling through various regions of France so I will be visiting new places throughout the season. There is another team in a town called Brive not so far away who play in the top league in France, but I decided to stay local. I may go and see them with other assistants if possible during our stay.
I witnessed a friendly match on Saturday when they played Stade Dijon in the division below them. The match finished 70-12. After the match, both teams went to the club house to see the Rugby World Cup semi-final between New Zealand and Australia. Both teams respected each others which is something you don’t always see in other sports. I spoke to the president of the club after the game and he told me, “This is a family club.” Hopefully this year will be a good year for Limoges.How did the writer try to combine into Limoges' community?
| A．By taking part in the local rugby team. |
| B．By watching the rugby matches in Limoges, |
| C．By playing often with the people in Limoges. |
| D．By paying close attention to the local rugby team. |
The underlined word “it” in the second paragraph refers to_____________,
| A．the club office | B．the local rugby team |
| C．the tourism office | D．the local community |
Why did the two teams go to the club house aft6r the match?
| A．To show respect to each other. |
| B．To watch the Rugby World Cup semi-final. |
| C．To clean the club together. |
| D．To exchange experience with each other. |
What can we infer from the text?
A. The writer must be a top rugby player.
B. The writer is likely to be a boss of a rugby club.
C The writer is likely to come from Australia.
D. The writer probably works as an assistant in France.
IMAGINE that your parents have bought you the most advanced robot. He looks like a real person. He talks to you and plays with you. He can even think for himself and figure out what you need.
It may feel as if you have a considerate new brother who keeps you company all the time. But come to think of it, can you really trust him?
Ever since the first robot was created decades ago, scientists have kept thinking about the task of making robots more like humans. However, as they have gotten closer to that goal, doubts have grown. According to the BBC, Japanese robot designer Masahiro Mori argues that the more lifelike robots become, the more humans feel a connection to them. But once they become too similar to humans, people begin to feel uncomfortable.
This theory is what led to the creation of a brand new robot in Switzerland earlier this month. Roboy, as the new machine is called, has various human-like abilities such as hand-shaking and bicycle-riding, but instead of a skin-like covering, Roboy is wrapped in shiny white armor (盔甲) that clearly shows its robot status.
“As long as people can clearly see that the robot is a machine, even if they project their feelings into it, then they feel comfortable,” Rolf Pfeifer, the creator of Roboy from the University of Zurich, Switzerland, told the BBC.
But the problem that people have with robots is not just with the way they look. It also has to do with the roles that they play in our lives.
A survey last year of European Union countries showed that 88 percent of those interviewed agreed that robots are “necessary as they can do jobs that are too hard or dangerous for people”, such as space exploration and war fighting. But when it comes to taking care of children, 60 percent said that robots should not be allowed to participate, because as robots become more advanced and complicated, parents may tend to hand over too much responsibility to them.
No matter what, robots will soon enter our homes, Pfeifer said. What is not yet clear is whether they will act more like servants who work for us or companions who live with us.What is the purpose of the text?
| A．To introduce the newly-invented robot, Roboy. |
| B．To discuss problems related to designing robots. |
| C．To explore the roles robots will play in our future lives. |
| D．To argue what kinds of robots appeal to people more. |
Why did Pfeifer make Roboy look like a robot?
| A．To better protect it. |
| B．To make it look cool and modern. |
| C．To make it clearly different from a human. |
| D．To keep its price down. |
Which best describes the author’s tone in the article?
| A．Objective(客观的). | B．Critical(批评的). |
| C．Admiring. | D．Anxious. |
Which of the following statements is true according to the passage?
| A．The brand new robot in Switzerland can do everything human beings can. |
| B．Scientists have long been dreaming of creating human-like robots. |
| C．Robots in the future will serve as human beings’ good friends. |
| D．People won’t be comfortable with robots like a machine in the house. |
Eating too much fatty food，exercising too little and smoking can raise your future risk of heart disease. But there is another factor that can cause your heart problems more immediately：the air you breathe.
Previous studies have linked high exposure（暴露）to environmental pollution to an increased risk of heart problems, but two analyses now show that poor air quality can cause heart attack or stroke（中风） within as little as a few hours after exposure. In one report of the research, scientists found that people exposed to high levels of pollutants（污染物）were up to 5% more likely to suffer a heart attack within days of exposure than those with lower exposure. Another study of stroke patients showed that even air that the U.S. Environmental Protection Agency（EPA）considers to be of “moderate”(良好) quality and relatively safe for our health can raise the risk of stroke as much as 34% within 12 to 14 hours of exposure.
The authors of both studies stress that these risks are relatively small for healthy people and certainly modest compared with other risk factors such as smoking and high blood pressure. However, it is important to be aware of these dangers because everyone is exposed to air pollution regardless of lifestyle choices. So stricter regulation by the EPA of pollutants may not only improve environmental air quality but could also become necessary to protect public health.The text mainly discusses the relationship between _________ .
| A．heart problems and air quality |
| B．heart problems and exercising |
| C．heart problems and smoking |
| D．heart problems and fatty food |
The underlined word “modest” in Paragraph 3 most probably means _________ .
| A．relatively high | B．extremely low |
| C．relatively low | D．extremely high |
We can learn from the text that __________？
| A．eating fatty food has immediate effects on your heart. |
| B．the EPA conducted many studies on air quality. |
| C．moderate air quality is more harmful than smoking. |
| D．stricter regulations on pollutants should be made. |
The author’s purpose of writing the text is most likely to _________ .
| A．inform | B．persuade | C．describe | D．entertain |
Guide to Stockholm University Library
Our library offers different types of studying places and provides a good studying environment.
Zones
The library is divided into different zones. The upper floor is a quiet zone with over a thousand places for silent reading, and places where you can sit and work with your own computer. The reading places consist mostly of tables and chairs. The ground floor is the zone where you can talk. Here you can find sofas and armchairs for group work.
Computers
You can use your own computer to connect to the wi-fi specially prepared for notebook computers; you can also use library computers, which contain the most commonly used applications, such as Microsoft Office. They are situated(位于) in the area known as the Experimental Field on the ground floor.
Group-study places
If you want to discuss freely without disturbing others, you can book a study room or sit at a table on the ground floor. Some study rooms are for 2-3 people and others can hold up to 6-8 people. All rooms are marked on the library maps.
There are 40 group-study rooms that must be booked via the website. To book, you need an active University account and a valid University card. You can use a room three hours per day, nine hours at most per week.
Storage of Study Material
The library has lockers for students to store course literature. When you have got at least 40 credits(学分), you may rent a locker and pay 400 SEK for a year’s rental period.
Rules to be Followed
Mobile phone conversations are not permitted anywhere in the library. Keep your phone on silent as if you were in a lecture and exit the library if you need to receive calls.
Please note that food and fruit are forbidden in the library, but you are allowed to have drinks and sweets with you.The library’s upper floor is mainly for students to __________.
| A．read in a quiet place |
| B．have group discussions |
| C．take comfortable seats |
| D．get their computers fixed |
Library computers on the ground floor __________.
| A．help students with their field experiments |
| B．contain software necessary for schoolwork |
| C．are for those who want to access the wi-fi |
| D．are mostly used for filling out application forms |
What condition should be met to book a group-study room?
| A．A group must consist of 8 people |
| B．Three-hour use per day is the minimum |
| C．One should first register (注册) at the university |
| D．Applicants must mark the room on the map |
A student can rent a locker in the library if he __________.
| A．can afford the rental fee |
| B．attends certain courses |
| C．has nowhere to put his books |
| D．has earned the required credits |
When 47yearold volunteer Susan Boyle stepped onto the stage of Britain's Got Talent and announced she was unemployed, had never been married and “never been kissed, actually”， few in the audience would have wondered why. This Ms Boyle, looking unfashionable, from a village in Scotland, shocked the three judges and the audience with the song I dreamed a dream on a show of Britain's Got Talent.
She couldn't hide the awkwardness when walking to the center of the stage in a house dress, and everyone — including the judges — seemed laughing at her when she said she wanted to be as successful as Elaine Paige. As soon as she began singing, however, everyone in the hall fell silent, then rose within seconds to admire her wonderful voice as the celebrity judges sat openmouthed, and remained standing to the end.
After her performance, one of the judges Piers Morgan said，“Without doubt that was the biggest surprise I've had in three years of this show. When you stood there everyone was laughing at you. No one is laughing now. That was amazing.” Actress Amanda Holden followed，“I'm so thrilled because I know that we everybody were against you. I honestly think that we were all being very cynical (愤世嫉俗的) and I think that's the biggest wakeup call ever.”
Susan obviously won over the hearts of millions around the world with success spreading across the Atlantic. Hollywood actor Ashton Kutcher, who has nearly 1.5 million followers, speaks highly of her. Kutcher posted a link to the video clip (片段). The Scottish talent made her live American show via satellite connection on CBS's The Early Show, doing an interview and singing live from her room. And she already accepted an invitation from talk show hostess Oprah Winfrey.
Now Boyle has become one of the world's hottest celebrities. The video clip of her performance has been viewed more than 50 million times on Youtube, becoming a hit on the Internet.We learn from the passage that Susan Boyle ________.
| A．rose from a low social class |
| B．had an unhappy marriage |
| C．lived with a dog alone on a farm |
| D．won the championship in the Britain's Got Talent show |
At the beginning of the show, almost everybody ________.
| A．looked forward to her wonderful performance |
| B．was attracted by her beautiful dress |
| C．looked down upon her |
| D．placed great hope on her |
The 4th paragraph is mainly about ________.
| A．how Susan Boyle achieved her success |
| B．the comment made by American actor Ashton Kutcher |
| C．Susan Boyle's influence in the USA |
| D．Oprah Winfrey's invitation to Susan Boyle |