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.
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 |
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【推荐1】Last Saturday, my cousin and I went around our neighbourhood, looking at things in yard sales. You wouldn’t believe the great things we found and the great fun we had!
The yard sale in our neighbourhood is one of the biggest in the area. It started with only a few families, but as more and more people came to care about the environment, it became more and more popular. Now, even people from a few kilometers away come to the sale. Each family puts out things such as books, clothes, and even ovens. They hope others will find another use for those things.
The day was quite hot, so we got up quite early. First, we stopped at Ms. Fisher’s house. Her son was leaving for college, so there were lots of things he no longer needed. He had several sets of music CDs and lots of good books. Guess what? I found one of my favorite books. What was more, all I had to pay was a dollar. What a deal! Then, we moved on to other houses. The street was full of people and everyone was happy.
Think about it. It’s really good for the environment and for people too. Next time you feel like an adventure (探险), check out a yard sale. It’s fun, and it’s a great way to use things again.
根据短文内容,选择最佳答案。
1. Why is the yard sale becoming popular in the neighborhood?
A.People think it’s an easy way to save money. |
B.People are too busy to go to shopping centers. |
C.People want to do something for the environment. |
A.The writer felt happy about the price. |
B.The writer decided not to buy anything. |
C.The writer thought the book was expensive. |
A.The writer went to the yard sale alone. |
B.The writer bought several sets of CDs. |
C.The writer enjoyed himself in the yard sale. |
A.To explain what the yard sale is. |
B.To encourage people to visit the yard sale. |
C.To tell the importance of protecting the environment. |
【推荐2】The 2024 Summer Olympics are coming. While waiting for the event to begin, we can learn something about it.
The organizers have promised to bring less harm to the environment by minimizing the number of newly-created buildings. In Paris, 95 percent of places used for the games are already there or will be put in place for a short period.
In one of the latest developments, the organizers said that a total of 11,000 seats in two gyms, Arena Porte de la Chapelle in Paris and the Aquatics Center in Saint-Denis, will use recycled plastic chairs.
The decision was made after local manufacturers (制造商) found there weren’t enough plastic materials, which forced them to turn to recycled waste.
That was why the organizers began working with Lemon Tri and Le Pav. The two companies (公司) got the idea of getting plastic waste from recycling bins around the city. Over 100 tons of plastic is needed to make the seats and 80 percent of it is collected from local schools and street-side bins in Seine-Saint-Denis. It’s also where the plastic waste is processed into new materials.
“When we ask children to put their bottles in the bins and tell them they will become the seats of the Olympic swimming pool, it helps them learn about the importance of recycling waste,” said Augustin Jaclin from Lemon Tri.
Of course, collecting plastic is one thing and turning it into Olympic chairs is another. After all, making them isn’t as easy as making normal chairs.
1. What does Augustin Jaclin think of collecting plastic from children?A.Difficult. | B.Boring. | C.Educational. |
A.The importance of recycling waste. |
B.The process of turning recycled plastic into chairs. |
C.The advantages of using recycled plastic. |
A.11800. | B.11000. | C.11950. |
A.Two companies behind the 2024 Summer Olympics. |
B.A new swimming pool ready for the 2024 Summer Olympics. |
C.The 2024 Summer Olympics will use recycled plastic for some seats. |
You have just finished eating an apple while on a camp. There aren’t any rubbish bins around; what do you do with the apple core (核)? If you answered “throw it in the grass” because you thought fruit would not have a bad influence on nature, you are wrong.
According to the scientists, decomposition (分解) of fruit litter takes much longer time than you imagine. Some of these “natural” food can take years to decompose depending on the environment they are in!
When animals start to get their food from people, they may stop looking for their own food in nature. This is very dangerous because animals need different foods to stay healthy. Food waste also draws animals to go to areas where there are a lot of people. And when food is thrown out of a car window, animals may develop the habit of searching roadsides for food, which increases the chances of their being hit by a car.
In fact, apples, bananas and oranges are not from wild forests. If they are eaten by wild animals, they will probably cause the animals to get sick. Seeds (种子) of these fruit or vegetables that end up on the ground could grow into an exotic plant there. It doesn’t belong to the local kind. And then, of course, nobody wants to see someone else’s fruit litter, which has already gone bad, while enjoying the beautiful outdoors.
So, no litter is safe litter, not even an apple core.
1. How does the writer start the text?A.By collecting readers’ answers. |
B.By describing a situation in life. |
C.By encouraging people to protect nature. |
A.It provides different foods for them. |
B.It prevents them from dying of bunger. |
C.It makes them depend on humans too much. |
A.外来的 | B.本地的 | C.变质的 |
A.To advise us not to eat while camping. |
B.To ask us to protect the wild animals. |
C.To call on people not to litter food waste. |
A.HEALTH | B.ENVIRONMENT | C.SPORTS |
【推荐1】Do you get angry when your friends sing loudly while you are working, or when your best friend does not wait for you after school?
If you do, you need to take control of your feelings and stop getting angry so easily. Getting angry with people can make you lose friends.
Gary Egeberg, an American high school teacher, has written My Feelings Are Just Like Wild Animals to help you control your feelings. It tells teenagers how to stay cool when bad things happen to them. The book says that getting angry only makes problems worse. Getting angry is not a natured(本性的) way to act. It is just a bad habit, like smoking. The book says you can control your anger easily—all you have to do is to tell yourself not to be angry.
When a baby falls over, it only cries if people are watching it. Like a baby, you should only get angry if you are sure it is the right thing to do.
The book gives many tips to help you if you get angry easily. Here are the top three:
★Keep a record. Every time you get angry, write down why you are angry. Look at it later and you will see you get angry too easily.
★Ask your friends to stop talking to you when you get angry. This will teach you not to be angry.
★Do something different. When you get angry, walk away from the problem and go somewhere else. Try to laugh!
1. The writer thinks that if you get angry easily you will .A.lose your friends | B.get ill very easily | C.lose weight easily |
A.book | B.story | C.picture |
A.the book | B.the habit | C.the baby |
A.write down a song | B.do something different | C.ask our friends to talk to us |
A.How to keep a record | B.When to stop getting angry | C.How to keep cool when you get angry |
【推荐2】Life in the future will be different from life today. Between then and now many changes will happen. But what will the changes be?
The population (人口)is growing fast. There will be many people in the world and most of them will live longer than people living now.
Computers will be much smaller and more useful, and there will be at least(至少)one in every home. And computer studies will be one of the important subjects in schools then. People will work fewer hours than they do now and they will have more free time for sports, watching TV and traveling. Traveling will be much cheaper and easier, and many more people will go to other countries for holidays.
There will be changes in our food, too. More land will be used for building new towns and houses for people. Then there will be less room for cows and sheep, so meat will be more expensive. Maybe no one will eat it every day. Instead, they will eat more fruit and vegetables. Maybe people will be healthier. Work in the future will be different, too. Robots will do dangerous and hard work. Because of this, many people will not have enough work to do. That will be a problem.
1. In the future there will be________.A.less fruit | B.fewer people |
C.fewer vegetables | D.much more people |
A.robot | B.cow | C.TV set | D.computer |
A.work long hours | B.work fast | C.walk on foot | D.eat meat |
A.fruit | B.fish | C.meat | D.rice |
A.people have to work fast |
B.many people don’t have to work |
C.all the work will be done by robots |
D.many people will not be able to find work |
【推荐3】Do you know the flea market (跳蚤市场)? It’s a street market where people sell second-hand things. These can be anything from clothes and shoes to chairs and beds.
________. We don’t know. It is said that these second-hand things attract (吸引) fleas, so people call the market “flea market”.
There are many great flea markets in the world. Do you know Old Spitalfields Market in London? It is open for over 350 years. We can buy all the things at very good prices there. It attracts 70 000 visitors one week.
You need to have a good eye when you go to a flea market because some things are really nice, but others are not. And it is good if you know what you want to buy before you go, or you may go home with many old things that you don ’t need at all.
1. We can find ________ at a flea market.A.a new chair | B.a lost sweater | C.a second-hand bed | D.a flea |
A.Why there are so many fleas | B.How the second-hand things are |
C.What people do at the flea market | D.Where the name “flea market” is from |
A.the flea market is boring. |
B.all the things are nice at the flea market. |
C.we can buy all the things at the flea market. |
D.we should have a good eye when we buy things at the flea market. |