Scientists use computer games to study how ants fight. Computer games can sometimes be very helpful to scientists! A team of scientists in Australia played Age of Empires, a war game, to study ants. They tried to find ways to help local ants live better.
Argentinian ants are an invasive species (入侵物种) in Australia. When they meet with local meat ants, the two ant types fight. And usually, Argentinian ants win. This is dangerous. When local ants die and the invasive animals grow in number, the newcomers may eat a lot of plants and harm the local environment.
Scientists want to help local ants win. They built two characters in the game: Knights as the meat ants that are bigger in size but smaller in number, and Swordsmen as the Argentinian ants that are smaller in size but bigger in number. When the game starts, the characters start fighting with each other just like the two ant types do in real life.
After rounds (轮) of fighting, nine Knights lost to 50 Swordsmen on the flat ground. But the same team of Knights beat 70 Swordsmen in an uphill (上坡的) environment. It showed that the local meat ants could do better in complex environments. The scientists also did tests with real ants. The results were the same.
The team believes that cities can add more lower plants under trees. This way, there will be more complex environments, and the meat ants may win the “wars” against invasive ants.
【小题1】What will happen if local meat ants die and Argentinian ants grow in number?A.Scientists will be very dangerous. |
B.The two ant types will live better. |
C.Local meat ants may eat up a lot of plants. |
D.Argentinian ants may hurt the environment. |
A.harmless | B.polluted |
C.made of many different things | D.made up of few harmful things |
A.To build more characters in the game. |
B.To grow more lower plants under trees. |
C.To let Argentinian ants smaller in number. |
D.To make the meat ants much bigger in size. |
A.Helping local ants fight | B.Playing computer games |
C.Giving a good suggestion | D.Protecting the environment |
【小题1】When was London the biggest city in the world?
A.In 1750. | B.In 1850. |
C.In 1950. | D.In the 21st century. |
A.It’s a toy shop. | B.It’s a park. |
C.It’s a clock. | D.It’s a museum. |
A.Over half of its population. |
B.Over three quarters of its population. |
C.Over one million. |
D.Over 7,000,000. |
A.It was much cleaner than it is now. |
B.It was the same as it is now. |
C.It was the cleanest in the history of London. |
D.It was not as clean as it is now. |
A.There are not too many cars on the streets. |
B.There are 5 parks in the city. |
C.Many big cities have the problems with traffic and pollution. |
D.Children’s favorite place is Hamleys, the biggest park in London. |
From Millions to None
The Passenger Pigeon’s Flight to Extinction
A new documentary, From Billions to None tells the forgotten story of the extinction of the passenger pigeon 100 years ago.
The story of the passenger pigeon is strange and pretty sad. We want to get your attention. But there is still a lot more we can do as a society. And it starts with you. We help you find ways to change our world for the better. Make a difference!
Organizational Use DVD
For classroom, community, library and business use. (K-12 Schools, Public Libraries, Community Group — $ 89 Colleges, Businesses, Other Organizations — $ 250)
Home Use DVD
For personal home use ONLY. ( $19. 95 each; $13. 00 shipping and handling )
【小题1】How much will Ms Read pay if she orders one DVD for her 8-year-old son online?A.$19. 95. | B.$89. | C.$102. | D.$32. 95. |
A.help protect the passenger pigeons |
B.call on people to do what they can for a better world |
C.sell more DVDs to raise money for passenger pigeons |
D.find out why the passenger pigeons die out |
The music band Coldplay is taking actions to protect the environment. This includes using their fans’ energy to help provide electricity for their performances. In this way, they use electricity without adding carbon gases (碳气体) to the air. The band hopes to cut the amount of CO2 given out by its business activities by 50 percent.
The Coldplay stars have added special dance floors and energy-storing bicycles to their latest world tour performance. The purpose is to get fans to help produce electricity by dancing and riding. Each dance floor can support many people. It creates electricity when people move on it. Each of the bikes can create an average of 200 watts (瓦特) of electricity. In order to encourage fans to dance or ride more during the performance, they even have competitions to find out which group of fans can create the most electricity.
“Being green is a good business model. That’s what we’d like to show,” said Coldplay lead singer Chris Martin. “The changes will bring a sense of belonging to the fans. Everything in our show is planned to bring everyone into the same group, singing together. It makes us feel part of a community.”
Coldplay has taken other steps to protect the environment. One of its tour stages (舞台) uses recycled steel. The band also hopes to set up the world’s first tour battery (电池) system, made from 40 recycled electric car batteries. The hope is to power the whole show with batteries.
“It’s very expensive to try these things for the first time,” said Martin, “but we are very happy that we are changing.”
Coldplay is just one music group working to help the environment. Some other famous bands are also taking such steps.
【小题1】What does Coldplay use their fans’ energy to do?A.To create 200 watts of electricity. | B.To provide power for their shows. |
C.To cut their business activities by 50%. | D.To make their performances wonderful. |
A.The floor. | B.The band. | C.The stage. | D.The bicycle. |
A.By helping them to buy bicycles. | B.By living in the same community. |
C.By traveling around the world with them. | D.By having electricity-creating competitions. |
①Riding energy-storing bicycles. ②Driving or taking electric cars.
③Recycling electric car batteries. ④Building stages with recycled steel.
A.①②③ | B.②③④ | C.①③④ | D.①②④ |
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