Today there are 6 billion people on the Earth. By the year 2050, there may be 12.5 billion. There are a lot of people to feed. We need more food.
One way to produce more food is by growing stronger plants. For thousands of years, farmers have made plants better. Every season, they pick the best plants for the next season. It works very slowly. Since 1983, scientists have been able to change plants more quickly by changing their genetic material(遗传物质). Foods from plants grown in this way are call genetically modified foods(转基因食品), or GM foods.
By changing the genetic material of a plant, it is possible to make new plants. They make plants strong against plant diseases. They can also help in our diseases: a kind of rice is being prepared, for example, which stops people from becoming blind.
Rich countries produce GM foods because they are easy to grow and bring in more money. Poor countries are interested in them because they help produce more food.
GM plants are not natural. No one knows how good or bad they are. Making GM foods is only one way of feeding people in 2050. There are strong feelings against them, because the are unnatural. They may feed people, and then hurt them or their children later. But, both rich and poor countries are very interested in their use, and they are not going away. In 2050, we may think differently about them.
1. GM foods are made by ________.A.farmers | B.workers | C.scientists | D.plants |
A.They make plants strong against diseases. | B.They are unnatural. |
C.They can help in human diseases. | D.Both A and C. |
A.are a quick way to produce food | B.grow in the wild |
C.are safe | D.are grown only in rich countries |
A.They are not useful. | B.They are not helpful. |
C.They are not natural. | D.They are not cheap. |
A.GM foods will disappear one day in the future |
B.GM foods will not disappear in the future |
C.people will not be interested in GM foods |
D.people will have to stop using GM foods |
相似题推荐
【推荐1】 ?
Although “hamburger” has a German name, it actually started in the USA and is now popular all over the world. The most basic hamburger is two buns with a piece of beef and some lettuce and sauce in the middle, but a hamburger can have many other ingredients as well. In Shanghai, you can eat all different kinds of burgers. In Las Vegas, you can even taste a burger with gold foil (金箔)!
![](https://img.xkw.com/dksih/QBM/2023/4/28/3226218026459136/3261721582223360/STEM/3ce2d24a4ecc4e44a8624540f2a5632a.png?resizew=664)
1. When did people start eating hamburgers?
A.100 years ago. | B.120 years ago. | C.200 years ago. |
A.
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B.
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C.
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A.Hamburgers belong to Sandwiches. |
B.People doesn’t like hamburgers with beef. |
C.Hamburger restaurants are the most popular restaurants in the US. |
A.Hamburgers were created by Americans. |
B.Hamburgers may have different ingredients all over the world. |
C.The most expensive hamburger makes a good lunch for a person. |
A.Stories. | B.Facts. | C.Ads. |
【推荐2】But ugly fruits should be loved, too. In recent years, a new crop of “ugly produce” companies have been around the U.S. These start-ups sell those ugly fruits that supermarkets refuse. And they send them right to your door.
The companies say they’re on a mission(使命). They want to stop billions of pounds of imperfect produce(农产品)from going to waste. Think of it this way: Is a banged-up (be knocked and some places broken) banana any less tasty in a peanut butter sandwich? Why should it be thrown away?
Sounds like these companies have the right idea. They even offer deep low prices. That’s great news for customers. But not everyone is happy. Some people say these companies may be thinking only about themselves.
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Imperfect produce isn’t always wasted.
Many small farmers had already been selling imperfect produce to customers and farmers markets. Then the ugly produce companies started growing up. These companies, such as Imperfect Produce, can offer more fruits and veggies from large farms around the country. They make it harder for smaller farms to compete. So the farmers are losing money.
Also, ugly fruits and veggies already have uses. Take the food service industry for example. There, produce is sliced, diced, blended, and more. No one cares if the fruit is pretty or ugly. On farms, fruits can be fed to animals. Rotted(腐烂的)fruit is added back into soil for nutrients. And, what’s more, ugly produce companies have been charged with taking food away from the needy.
Are these start-ups causing more bad than good?
Not So Bad, After All?
What do ugly produce companies say? They are guarding themselves.
In March 2019, Imperfect Produce told people that the company doesn’t take away from the needy. It gets resources from farms only after food banks take what they want, it said. Also, the company often gives food to food banks. Put that in your food basket!
It is true that produce goes to waste in America. The Department of Agriculture has said that food waste is a big problem. In fact, about 30 to 40 percent of the country’s food is wasted.
But Imperfect Produce says both farmers and ugly produce companies can help reduce food waste. It doesn’t have to be either-or.
No matter whose side you’re on, remember this: It’s what’s on the inside that counts.
1. What does Paragraph 3 mainly talk about?A.Ugly produce companies are doing more good than bad. |
B.Not everyone supports ugly produce companies’ missions. |
C.Ugly produce companies are loved because of lower prices. |
D.Ugly produce companies make the most use of imperfect produce. |
A.The Ugly Truth? | B.Not So Good, Above All. |
C.But So Bad, Really? | D.The Ugly Wasted. |
A.It’s important for smaller farms to get more customers to make money. |
B.Food waste is caused because supermarkets refuse ugly produce. |
C.Ugly produce companies sell imperfect produce to prevent waste. |
D.Customers are interested in stopping food waste and saving money. |
A.tell ugly produce companies to give unwanted fruits and vegetables to the needy |
B.show the reasons why there are more and more ugly produce companies |
C.offer readers an introduction to ugly produce companies and their missions |
D.make readers only buy food from companies that work with smaller farms |
The way to a man’s heart is through his stomach. This is what Chin a offered me the moment my feet touched its ground. My first date with Chinese food was not a good experience.
One day, my Chinese classmates took me to a Chinese restaurant near our university. It was a treat from our older student. As we went inside the restaurant, I saw big round tables with a number of chairs around. My classmates then called the waiter for our orders.
A.My first impression didn’t last. |
B.I thought it did not suit my taste. |
C.One dish after another until the table was full. |
D.Since I was new, I just let them choose the dishes for me. |
E.China won my heart when the Chinese food got through my stomach. |
F.I found each dish interesting to my mouth, and I forgot to slow down. |
A. The 3D printed houses will be made by ICON in Texas.The company can print a 60-square-metre house in just 12-24 hours. The walls of the house look like cream. Each house costs $10.000 The materials can be used again.
B. Some houses have been made in a shape like a ball. The walls, ceiling and floor are all in a house with this shape. The wind moves around the outside of the house. Ball-shaped houses can be hung from things or float on water.
C. Some people live in windy places. Big winds can blow houses down. A dome house is made of triangle shapes to let the wind to around it. There is no wind in a dome house, so it is safer in a fire.
D. A house in a tree doesn't use any space on the ground at all. No trees have to be cut down to make room for these houses. And the tree house can be built in the shape of a bee nest. Such a house doesn’t take very long to move to a new place.
E. Some scientists have made a house that can walk. The house has six legs. It can walk over any ground. When it walks, three legs are always on the ground. A walking house would be very good if there was a flood or a fire.
F. Some scientists are tying to turn used plastic into bricks. These bricks are designed well and can be used to build houses for the poor families in some parts of the world.
1. Ken worries that there will be less and less space on the ground if people keep on building houses. It is bad for human to cut down so many trees for houses.
2. Cindy is interested in houses with new technology, because it takes less time and costs less to build this kind of house. And it is better for the environment.
3. Carrie lives near the sea. Sometimes her house will be blown down by the strong wind. She really hopes that her house can be kept away from the wind.
4. Mary’s son is a super ball fan. He is crazy about ball games. He even dreams that he can live in a ball.
5. Nancy is an environmental protection member. She hopes that she can build some houses with used things like plastic, bottles and so on.
It’s reported that a Chinese company has created a new facial recognition (面部识别) system that can know who you are even if you are wearing a mask.
“When people wear a mask, the recognition rate (比率) can reach about 95 percent,” said Huang Lei, Hanwang’s vice president. “
Nowadays the new system is trying to know who a person is when he or she is wearing sunglasses and a mask. “In such situations, all of the key facial information is lost, making recognition hard,” Huang said.
A.It’s said that the multi-channel system can find a person in a group of up to 30 people quickly. |
B.The system’s success rate for people without wearing a mask is about 99.5 percent. |
C.China is leading the world in the development of artificial intelligence (AI). |
D.Developers began working on the new system in January 2020 when COVID-19 appeared in China. |
E.Hanwang is now selling two kinds of machines using the new technology. |
Cool Glasses ![]() Researchers from Cornell University, US, made a pair of glasses. It looks nothing special, but it can read lips (嘴形)! There are sensors (传感器) on the frame (框架). They can understand silent speech through lip and mouth movements. Then the glasses can send the text to a smartphone. For people who can’t speak, the eyeglasses give them a voice. It is correct 95 percent of the time. _____________ ![]() This kind of alarm clocks is right for people who feel difficult to get out of bed in the early morning. You may find many alarm clocks are easy to turn off and can hardly help you get up. Now this alarm clock is different. It flies around your room making some noises you don’t like. The only way to stop it is to catch the noisy thing and place it on the base (底座). Fruit Lamps ![]() This lamp might not look special. But it smells like an orange! This is because it’s made of orange peels. Italian company Krill Design made it out of oranges. They used 3D printing technology (技术). This technology doesn’t waste materials. The lamp is 23cm tall and has an LED bulb (电灯泡). The company is now selling it for 72 pounds (640 yuan). |
1. The “cool glasses” can ________.
A.move people’s mouths | B.make sounds correctly |
C.understand silent speech | D.help people see more clearly |
A.Great Bases | B.Flying Alarms | C.Noisy Things | D.Different Clocks |
A.get up very early | B.put it on the base |
C.walk around your bed | D.stand some noises |
A.it’s made of orange peels | B.it sells at a good price |
C.it’s tall and has an LED bulb | D.it’s made with a 3D printer |
A.People should help each other. | B.No one can live alone in the world. |
C.Everyone can be inventors (发明家). | D.Technology changes people’s life. |
【推荐1】Flamenco is very popular in southern Spain. It begins with guitar music and clapping(击掌)and then dancers join the performance. Sometimes a woman dances alone and sometimes she dances with a man. The woman always wears a long, colorful dress. She moves her arms and hands slowly but her feet move in fast difficult steps. The man often wears black. Both dancers click their shoes on the floor when they dance around each other.
Cossack dances are from Russia and Ukraine. They are very energetic—some are more like gymnastics than dancing! Dancers have to be very fit because they jump very high and kick their legs up and down. They often jump over swords(剑). The movements are similar to traditional Cossack activities, for example, sword fighting and getting on and off horses.
Limbo dancing is first from West Africa but today it is an important part of celebrations in the Caribbean. Young people have to dance under a pole(杆). The pole is often on fire and the dancer mustn’t touch it! After a successful “limbo”, they put the pole lower and do it again. Some dancers can dance under a pole just twenty centimeters off the ground!
Mask(面具)dances are important for the Dogon people in Mali. Each village makes different masks. They are often huge and colorful. There are masks of people, monsters or local animals like crocodiles and monkeys. Mask dancers are always men and they dance to the sound of drums for hours after the death of a person in the village. Today, Dogon villagers also perform the dances for tourists.
1. What do we know about flamenco dancing?A.Dancers begin performing before the guitar music starts. |
B.A woman dancer often wears a long black dress. |
C.A woman dancer moves her hands and feet at different speeds. |
D.Dancers clap loudly while moving around each other. |
A.A play. | B.A sport. | C.A celebration. | D.A show. |
A.![]() | B.![]() |
C.![]() | D.![]() |
A.Dance Jumps and Moves | B.Dances for Different Ages |
C.Dance Music and Clothing | D.Dances from Around the World |
【推荐2】My name is Bob. I am an American boy but I am living in China now. I’m studying in Yucai Middle School. My parents are both teachers in this school. My school is not big but very beautiful.
You can see a big playground when you come into my school. Usually there are many students doing sports between classes. Around the playground, there are many tall trees. Under the trees, there are many stone(石头) tables. We can sit on them and have a rest. On the left of the playground. there is a classroom building. It has six floors. There are five classrooms on each floor. In front of the playground, there is a dining hall. We have breakfast and lunch in it. Behind the playground, there is a big garden. There are many beautiful flowers in it. You can see butterflies dancing among(在……之间) flowers, too. The multi-function(多功能的) building is behind the classroom building.
Welcome to my school and I will show you around it.
根据材料内容选择最佳答案
1. How many classrooms are there Bob’s school?
A.Six | B.Five | C.Thirty | D.Forty |
A.Garden | B.Gym | C.Dining hall | D.Classroom building |
A.at the back of | B.in the center of |
C.in the front of | D.across from |
A.蝴蝶 | B.苍蝇 | C.蜻蜓 | D.燕子 |
A.My School Life | B.My outdoor Activities |
C.My Day | D.My School |
The World Health Organization (WHO) is worried that 1.1 billion children and young people are damaging their hearing by listening to loud music. Nearly half the young people in developed countries may lose their hearing because of the "unsafe use" of music players, including smartphones. Loud music in nightclubs, parties and at sports also make it worse. The WHO advises young people to listen to music for just one hour a day. Dr. Etienne Krug told BBC: "What we're trying to do is to draw people's attention to a problem that is not talked about enough." He said it's easy to solve this problem.
Dr. Krug said keeping the music down and limiting (限制) the listening time to less than one hour a day would save a lot of people's hearing. However, he also said, "Even an hour can be too much if the music is too loud.” Ralph Holme, a researcher, explained how loud noise can damage ears. He said: "Loud sounds damage your hearing by killing off thousands of little hair cells(细胞) in the inner ear. The cells can tell different sounds through vibration(振动). But they are very fragile—they get damaged easily and even die if they vibrate too much because of loud sounds for too long.” He warned: "The bigger problem is they don't grow back and the ear can no longer get sound."
No one wants to lose their hearing! Therefore, next time when you listen to music, make sure it's not too loud and only listen for less than an hour. You can enjoy your music much better in this way.
1. How are the children and young people damaging their hearing?
A.By using smartphones. |
B.By going to the party. |
C.By listening to loud music. |
D.By talking with friends. |
A.For a long time. |
B.For just one hour. |
C.For half of the day. |
D.For more than one hour. |
A.Weak. |
B.Clever. |
C.Small. |
D.Strong. |
A.keeping the music down would save young people's hearing |
B.the damaged cells can grow back and the ear can get sound |
C.young people lose their hearing because of going to the nightclubs |
D.the problem of young people's hearing damage is talked about enough |