A new kind of rice, golden rice, may soon make its way into the world’s food supply by the year 2021, reports Science magazine.
Golden rice was actually first developed back in the 1990s by German scientists who were looking for creative ways to reduce rates of Vitamin A deficiency(维生素A缺乏症) in human body, which continues to be a major concern throughout the developing world. Beta-carotene(胡萝卜素), which exists in some plants, can change into vitamin A in our body.
In view of beta-carotene’s characteristics, German scientists tried and managed to make rice filled with additional beta-carotene, which has a strong red orange color. The beta-carotene that is added to this rice is actually what conduces to its special golden color.
To German scientists, developing this rice was meaningful. But as with all GM(转基因的) crops, some people warn that the golden rice may be unnecessary and even harmful, possibly having some environment consequences. Until now, those voices have prevented golden rice from being planted anywhere.
However, that’s about to change. Bangladesh now plans to become the first country to approve golden rice for planting. Recently, golden rice is receiving a series of tests before the final approval of Bangladesh. Tests conducted by the Bangladesh Rice Research Institute (BRRI) found no new farming challenges with golden rice and no big differences in quality between the crop and the traditional varieties, with the exception that golden rice is more nutritious. Some other organizations are still doing tests about the environmental influences of the crop. If those results are also good, then golden rice will have received all the approval it needs to move forward with planting.
As for the future market for the golden rice, the crop will need to gain the public’s trust. And it remains to be seen whether golden rice will offer a better nutritional and economical choice compared to other sources of vitamin A, such as other vegetables where it occurs naturally.
1.What was German scientists’ main purpose of working on rice?
A.To raise its output. B.To make it look prettier.
C.To collect its beta-carotene. D.To improve its vitamin A content in our body.
2.What does the underlined part “conduces to” in Paragraph 3 probably mean?
A.Causes. B.Changes. C.Removes. D.Lightens.
3.What do BRRI’s tests show about golden rice?
A.It can hardly grow on the farmland of Bangladesh. B.It is nutritionally better than traditional rice.
C.It may do serious harm to the environment. D.It is no different from other rice in taste.
4.How is golden rice’s future market in the author’s opinion?
A.Promising. B.Worrying. C.Uncertain. D.Hopeless.
高一英语阅读选择中等难度题
A new kind of rice, golden rice, may soon make its way into the world’s food supply by the year 2021, reports Science magazine.
Golden rice was actually first developed back in the 1990s by German scientists who were looking for creative ways to reduce rates of Vitamin A deficiency(维生素A缺乏症) in human body, which continues to be a major concern throughout the developing world. Beta-carotene(胡萝卜素), which exists in some plants, can change into vitamin A in our body.
In view of beta-carotene’s characteristics, German scientists tried and managed to make rice filled with additional beta-carotene, which has a strong red orange color. The beta-carotene that is added to this rice is actually what conduces to its special golden color.
To German scientists, developing this rice was meaningful. But as with all GM(转基因的) crops, some people warn that the golden rice may be unnecessary and even harmful, possibly having some environment consequences. Until now, those voices have prevented golden rice from being planted anywhere.
However, that’s about to change. Bangladesh now plans to become the first country to approve golden rice for planting. Recently, golden rice is receiving a series of tests before the final approval of Bangladesh. Tests conducted by the Bangladesh Rice Research Institute (BRRI) found no new farming challenges with golden rice and no big differences in quality between the crop and the traditional varieties, with the exception that golden rice is more nutritious. Some other organizations are still doing tests about the environmental influences of the crop. If those results are also good, then golden rice will have received all the approval it needs to move forward with planting.
As for the future market for the golden rice, the crop will need to gain the public’s trust. And it remains to be seen whether golden rice will offer a better nutritional and economical choice compared to other sources of vitamin A, such as other vegetables where it occurs naturally.
1.What was German scientists’ main purpose of working on rice?
A.To raise its output. B.To make it look prettier.
C.To collect its beta-carotene. D.To improve its vitamin A content in our body.
2.What does the underlined part “conduces to” in Paragraph 3 probably mean?
A.Causes. B.Changes. C.Removes. D.Lightens.
3.What do BRRI’s tests show about golden rice?
A.It can hardly grow on the farmland of Bangladesh. B.It is nutritionally better than traditional rice.
C.It may do serious harm to the environment. D.It is no different from other rice in taste.
4.How is golden rice’s future market in the author’s opinion?
A.Promising. B.Worrying. C.Uncertain. D.Hopeless.
高一英语阅读选择中等难度题查看答案及解析
However exciting space travel sounds, astronauts must still suffer with bad food. Now, food in space has to be dehydrated ( 使 脱 水 ) or pre-cooked and stored. This means astronauts aren’t really eating fresh food.
New technology may change this. Scientific American reports that a specially-designed oven will be sent into space this autumn with NASA’s NG-12 cargo (货物) mission (太空飞行任务).
Far from the common vacuum-packed (真空包装的) meals, astronauts may get to enjoy freshly baked cookies before the end of 2019.
Why aren’t they baking cookies in space already? For one thing, there’s the risk of a fire. Engineers also have to overcome the challenge of microgravity ( 微 重 力 ), which prevents heat from circling inside ovens the same way it does on Earth.
Astronauts will still have to wait a while before they can have their cookies, though. After baking, the results will be sent back to Earth for safety testing. If successful, this will be the first oven to bake food in space.
“I believe ... that will be game-changing for both science and astronauts,” food technology researcher Maeena Naman Shafiee told Scientific American.
One of the main driving forces behind this project has been NASA’s 2018 research into the effects of “confinement (封闭) and isolation (隔离)”. Unlike on the International Space Station (ISS), astronauts traveling out of Earth’s orbit (轨道) may not be able to speak to their loved ones on future missions, which could lead to negative feelings.
It’s hoped that the chance to bake and sense familiar smells can bring joy to crews (宇航人员).
“Is the ISS going to smell like fresh-baked cookies? We don’t know,” said NanoRacks’ communications manager Abby Dickes. “But that’s a feeling we all know and love ... that will make someone feel at home.”
Baking cookies in space would mark an important step, offering a small comfort in the difficult and unfamiliar environment of space travel. Astronauts have already grown plants aboard the ISS.
With commercial ( 商 业 的 ) space travel now being planned, who knows what other developments may surprise us in the future?
1.What can the new technology help astronauts to do in space?
A.Enjoy fresh cookies.
B.Store more food.
C.Quickly prepare food.
D.Cook many different kinds of home-made meals.
2.Why is it difficult to bake cookies in space?
A.It’s difficult and costly to send food into space.
B.Microgravity stops food from staying in one place.
C.Baking cookies in space would pollute the spaceships.
D.It is hard to heat food properly because of microgravity.
3.What was the main purpose of the cookie project?
A.To improve astronauts’ health.
B.To make improvements in space travel.
C.To encourage more people to travel to space.
D.To make space travel more comfortable for astronauts.
高一英语阅读选择中等难度题查看答案及解析
Breaking bad eating habits and starting good ones is one of the healthiest steps you can take.
But making healthy choices natural can take time. 1. In fact, it can take a certain time for a new habit to feel natural. So how do you stay on track until your new healthy-eating plan takes hold?
2.Setting too many goals or too many unrealistic ones can disturb you right from the start.
Think about why you’re snacking. 3.Or are you just bored or maybe a little stressed out? Skip the extra calories and take a five-minute walk instead. 4.The buddy(好友)system will keep you both on track. If you fail, don’t give up. According to the European Journal of Psychology study, little bumps(凸块)in the road aren’t likely to disturb the process of creating new habits. So, be patient and get back to your healthy ways as soon as you can. 5..
A.Start small.
B.Are you really hungry?
C.Try to do something big
D.With a little patience, those bad habits will soon be gone
E.After all, it’s hard to change a lifetime of bad habits overnight.
F.What kind of food do you want to eat when you are hungry?
G.And find a friend or co-worker who wants to make healthy changes, too.
高一英语七选五中等难度题查看答案及解析
If you grew up watching the kid’s television channel Nickelodeon, you will probably understand that there is nothing greater than enjoying its special bright green slime ( 水晶泥). The week of May 11, astronauts (宇航员) aboard the International Space Station(ISS) joined the slime.
Nickelodeon sent two kilos of its green slime into space in the summer of 2019. The Slime in Space project’s idea was to create an educational trip for teachers to use in class. The green slime was also used to guide astronauts through a series of experiments that were designed to learn more about how slime acts in microgravity.
Researchers from Portland State University(PSU) were excited to design the experiments for the project. Mark Weislogel and his partner designed eight shows for NASA astronauts and European Space Agency astronaut aboard to perform.
If you’re wondering what we could hope to learn from sending slime into space, the answer lies in its very name. Slime is slimy. This is because it is a liquid that is thicker than liquids like water. This makes slime act in unexpected ways in the microgravity of the ISS. Improving our understanding of how thicker liquids act in space may help us improve the design of systems that something were designed with Earth’s gravity in mind.
“Interestingly, we consider liquid on Earth as that takes the shape of its container,” Koch tells CNN. “Water just turns into a ball in microgravity, so we’ve had to have a new understanding of different kinds of matter in space. This experiment shows how microgravity can help us understand things on Earth, especially the things we take for granted.”
1.In paragraph one, Nickelodeon is mentioned .
A.to introduce the topic B.to attract the kids
C.to make advertisements D.to share a TV show
2.Why are the experiments with slime designed in space ?
A.Because they get students interested in space.
B.Because slime takes the shape of its container.
C.Because slime is popular with kids in the TV show.
D.Because they help us understand how slime acts in space.
3.What is Koch’s attitude towards the experiment with slime?
A.Puzzled. B.Worried. C.Uninterested. D.Positive.
4.Which of the following can be the best title of the text?
A.Microgravity makes a difference to matters.
B.Astronauts join the slime in space for science.
C.Kids join the slime so as to become astronauts.
D.Experiments are designed with slimy slime.
高一英语阅读选择中等难度题查看答案及解析
Friendship is a very important human relationship and everyone needs good friends. Good friendship has many benefits. It offers companionship, improves self-worth and promotes good health. There are times in our lives such as when we have recently moved into a new town, or changed our jobs or schools. Such changes often leave us without a friend1.But for many of us the process is difficult and requires courage. Below are some helpful suggestions on how to make and keep friends.
1.Associate with others.
The first step to making friends is associating with other people. You can go to public places to meet new people. Besides, you will need to make yourself known by becoming an active member of such places.
2.Start a conversation
Starting a conversation is the second most important step in making new friends.2.You can always start the conversation. Being able to make small talk is a very useful skill in relating with other people.
3.3.
Choosing friends with common interests is important in building friendship as these interests would always bring you and your friend together. Hanging out will always be a pleasant experience.
4. Let it grow.
It is a good thing to stay in touch. However, try not to press your new friend with calls, messages or visits as this would likely wear him or her out and finally you may lose your friend.4..The best friendships are the ones that grow naturally.
5. Enjoy your friendship
The best way to enjoy your friendship is to allow your friends to be themselves.5..Try not to change them from who they are to what you want them to be. Become the kind of friend you will want your friend to be to you.
A.Be cheerful.
B.Do things together.
C.Do not wait to be spoken to.
D.Try not to find fault with your friends.
E.Making new friends comes easy for some people.
F.For a friendship to develop you need to stay in touch.
G.So you will need to give your friend time to react to you.
高一英语七选五中等难度题查看答案及解析
English playwright Arthur Wing Pinero said, “Where there's tea, there's hope.” Similarly, a Chinese saying goes that “Firewood, rice, cooking oil, salt, sauce, vinegar and tea are the seven necessities to begin a day. ”
1.According to statistics, global tea production reached approximately 5.8 million tons in 2018. It has become the most consumed beverage(饮料) in the world-after water, of course.
In order to celebrate the popular drink, the United Nations General Assembly has named “May 21”as International Tea Day. 2. You probably know that people in China use top-grade tea to show respect when receiving important guests. 3.. Making Malaysia's pulled tea has become a sort of art form, where drinkers take pride in its entertainment aspects. As an expression of Moroccan hospitality(好客)and tradition, mint tea-a mix of green tea, spearmint leaves and sugar-is served during gatherings.
“Apart from its cultural significance, tea is also a medicine.” Tea is cold and lowers the fire, Chinese Ming Dynasty herbalist Li Shizhen once said. 4.Preventing heart disease, obesity and cancer has all been linked to drinking green tea, according to the National Center for Biotechnology Information in the US. The love for healthy tea products continues into a new decade as it's used in moisturizers, lip balms and other beauty products.
5. It's a social custom and also a magic medicine, a link to the past and a way of life.
A.Avoid drinking too much though it is beneficial.
B.Tea is, without doubt, welcomed all over the world.
C.The health benefits of tea are still being discovered today.
D.Hot or cold, bagged or loose-leaf, tea is more than a drink.
E.It has become a big part of many cultures around the world.
F.China, the homeland of tea, is a leading producer and consumer.
G.Meanwhile, afternoon tea is an important part of the British culture.
高一英语七选五中等难度题查看答案及解析
阅读下面短文,根据其内容写一篇60词左右的内容概要。
In our modern world, when something wears out, we throw it away and buy a new one. The problem is that countries around the world have growing mountains of rubbish because people are throwing out more rubbish than ever before, which, of course, raises the public’s concern of our living environment.
How do the society become a throwaway one? First of all, it is now easier to replace an object than to spend time and money repairing it. Thanks to modern technology, companies are able to produce products quickly and inexpensively. Products are plentiful and cheap, and it’s more convenient to get them delivered nowadays.
Another course is our love of disposable (一次性的) products. As busy people, we are always looking for ways to save time and make our lives easier. Companies produce thousands of different kinds of disposable products: paper plates, plastic cups and cameras, to name a few. It seems that disposable products have become a common part of our life.
Longing for new products also leads to the problem. We are used to buying new things and are always talked into buying something we don’t need. Advertisements persuade us that newer is better and that we will be happier with the latest products. The result is that we throw away useful belongings to make room for new ones. To decrease the amount of rubbish and to protect the environment, more governments are requiring people to recycle materials. However, this is not enough to solve our problem. Maybe there is another way out. We need to repair our belongings instead of throwing them away, we also need to rethink our attitudes towards spending. Repairing our belongings and changing our spending habits may be the best way to reduce the amount of rubbish and take care of our environment.
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高一英语概要写作中等难度题查看答案及解析
Dazzling (眼花缭乱) with their bright colors and eye — catching displays, fireworks light up our night skies during the holidays. However, these crowd -pleasers can have some damaging side effects. Once a firework is set off, it only takes a couple of seconds before smoke, dust and harmful chemicals are let out into the atmosphere. The loud booming noises are caused by gunpowder. While the sounds may excite some people, they can be frightening to domestic and wild animals — as well as some humans.
The pretty colors you see are a result of more chemicals. Barium, added to make green, is known for its poisonous and radioactive qualities. Blue comes from copper compounds. Cadmium, lithium and lead — all found in fireworks — have been linked to diseases, such as allergies and skin rashes in both humans and animals. Acid rain has been linked to gases given off by fireworks, which sometimes go beyond the toxin (毒素) limits of the United States Clean Air Act.
Once all those chemicals come back down to the ground, they can cause problems too. Debris (碎片) from the fireworks falls to the ground, where animals can bum their paws or noses on piping hot pieces. Humans also are at risk of stepping on or picking up something sharp or hot. Meanwhile, debris that finds its way into waterways can damage animal habitats and water supply sources. Instead of setting off fireworks, try to come up with some new ways for fun. Here are some ideas to get you started:
Sky lanterns — a tradition that originated long ago in the most-populated Asian country.
Party crackers — a favorite in the United Kingdom — give you noise and surprises without the mess of fireworks. You can make your own or buy eco-friendly crackers.
Want noise excitement with less volume? Consider a fireworks sound recording beforehand or break out the party horns (号角) and blow up a storm!
1.The advantages of fireworks can be seen below EXCEPT that _________.
A.the special sounds of fireworks excite people
B.the pretty and bright colors add to the beauty of night skies
C.fireworks are enjoyed as one of the crowd-pleasers
D.debris from fireworks can even find its way into water
2.Which of the following is NOT true according to the passage?
A.Chemicals in fireworks are both poisonous and dangerous.
B.Too much gases from fireworks can result in acid rain.
C.Copper compounds are needed to make green in fireworks.
D.Chemicals in fireworks are harmful in the air and on the ground.
3.What is implied from the passage?
A.Gunpowder in fireworks makes loud booming noises.
B.It must be Indians who first started to hang sky lanterns.
C.Fireworks can even break the balance of nature.
D.Fireworks does less harm in the air than on the ground.
4.What can be concluded as the writer’s attitude towards fireworks?
A.It is not allowed to set off fireworks except during the holidays.
B.Night is the best time to set off fireworks and see the pretty colors.
C.You cannot set off fireworks unless you come up with new ways.
D.Fireworks should be banned and replaced by some other means.
高一英语阅读选择中等难度题查看答案及解析
To many of us, art is obviously a kind of human expression of creativity. But in recent years, you may have read news about artificial intelligence (AI) creating its own art, such as painting or writing poems. Some people worry that AI might someday replace artists.
1.Many artists today are turning AI into a useful tool. Instead of replacing artists, AI is bringing artists more possibilities.
A piece of music created by AI recently attracted attention. AI was used to turn the novel virus into a piece of nearly two-hour long music based on its protein structure. The project was led by Markus Buehler, an American musician and MIT professor of engineering. He assigned (指定) a unique note to each amino acid (氨基酸) in the protein.2.
Listeners found the project to be “mind-blowing”. “It allows me to see the virus from a new angle,” said one listener.3.As The Verge wrote, “AI helps artists play around in unpredictable ways, creating things beyond what they have ever thought was possible before.”
4.For example, in the comic and animation industries, there are now AI tools that can automatically (自动地) color in black-and-white line drawings. Although the results can be unpredictable and require a little cleanup, it “could give artists room to experiment, by cutting down the time it takes to color each frame (画面)”, said Joao Do Lago, animator of Netflix’s Castlevania.
As Peter Ward wrote for The Culture Trip, art of every kind has always been influenced by technological breakthroughs.5.
A.The AI then translated these notes into music.
B.AI has become an important part of our everyday life.
C.But this worry seems to be unnecessary, at least for now.
D.AI can become a useful tool to bring change to the art world.
E.Besides the music industry, AI has entered the world of poetry as well.
F.This surprising marriage between science and art could not be achieved without AI.
G.Apart from co-creating imaginative works, AI can also help artists avoid repeating tasks.
高一英语七选五中等难度题查看答案及解析
Scientists blame greenhouse gases for being a major cause of climate change around the world. This is because greenhouse gases trap heat in the atmosphere and make the planet warmer.
Now, a team of researchers has announced a successful experiment that turned carbon dioxide into useful liquid fuel. The researchers created a device, called a reactor, which changes carbon dioxide into a pure form of formic acid(甲酸). Formic acid is a substance (物质) found in ants and some other insects, as well as in many plants. It is used as an antibacterial material and in the processing of some kinds of clothing.
Haotian Wang led the research team. He said in a statement that the results of the experiment were important because formic acid is a major carrier of energy. So, the substance can provide a way to reuse carbon dioxide and prevent it from being released into the atmosphere. “It's a fuel-cell fuel that can generate electricity and send out carbon dioxide which you can grab and recycle again,” Wang said.
“Other methods for turning carbon dioxide into formic acid require intense purification processes,” Wang said. Such methods are very costly and require a lot of energy. The Rice University team said it was able to reduce the number of steps in the traditional process to create a low-cost, energy-saving method.
The researchers reported the reactor device performed with a conversion rate (转化率) of 42 percent. This means that nearly half of the electrical energy can be stored in formic acid as liquid fuel. The team said the reactor was able to create formic acid continuously for 100 hours with little degradation (退化) of the device’s parts.
Wang said the reactor could easily be used to produce other high-value products, including alcohol-based fuels. The researchers noted that the technology could also be a big help in solving another major energy problem—how to store large amounts of power in small places.
1.What do we know about formic acid?
A.It is a large amount of power. B.It is high- value equipment
C.It can be found in ants. D.It is a substance in clothing.
2.What is Wang’s attitude towards his own research?
A.Optimistic. B.Aggressive. C.Doubtful. D.Uncaring.
3.In what magazine can you read this text?
A.A travel magazine. B.A science magazine.
C.A music magazine. D.A sports magazine.
高一英语阅读选择中等难度题查看答案及解析