Companion planting is the idea that when some crops are planted together, they help each other grow. The compatible plants generally have similar needs for nutrients, soil and moisture.
Advice for companion plantings is sometimes based more on tradition than proof. But Fabian Fernandez at the University of Illinois says there is evidence for some combinations. These can lead to better crops, reduce disease and help with pest control by attracting helpful insects. For example, some kinds of soil bacteria take nitrogen(氮) from the air and make a form that plants can use. The plants keep the nitrogen in their roots. Legumes(豆类) are especially good at this. Any crops sharing the same space can get the nitrogen as the roots decompose(腐烂).
Crops like beans and potatoes, carrots and cabbages, beans and rice can also share territory well because their roots reach different levels in the soil. Deep-rooted vegetables get nutrients and moisture from lower down, so they do not compete with shallower plants. But some plants placed together may harm each other's development. For example, tomatoes do not like wet soil but watercress does, as the name suggests. So you would probably not want to put them together.
Even after harvest, some kinds of produce should be kept apart. Apples, for example, release ethylene gas,a plant hormone. It can cause other foods to ripen(成熟)too quickly. Markets often separate high ethylene-producing foods from those that are sensitive to the gas. But sometimes you might want them together. For example, if you put an apple in a bag with a green banana, the banana will be ready to eat sooner.
Now what about peaches, plums and nectarines that are too firm to eat? Growers in California answer this question at eatcaliforniafruit.com. They say an apple,a banana or a riper piece of fruit is not needed. The peaches, plums and nectarines themselves release enough of the gas to ripen successfully.
Here's their advice: place the fruit in afruit bowl or in a paper bag with the top folded over. Keep the fruit at room temperature. When the fruit is soft enough to your liking, either use it or place it in a refrigerator to stop further ripening.
1.What are the basic needs for companion planting?
A. Good old companions. B. Some kinds of soil bacteria.
C. Nutrients, soil and moisture. D. Helpful insects.
2.What does the underlined sentence in Paragraph 2 most probably mean?
A. To some extent, companion planting relies more on traditional experience.
B. In the field of companion planting, proof always speaks louder than tradition.
C. Traditional experience is much less reliable than scientific experiments.
D. Scientific researches have thrown light on the theory of companion planting.
3.According to the text, which group of plants are not suitable to be planted together?
A. Beans and potatoes. B. Tomatoes and watercress.
C. Carrots and cabbages. D. Beans and rice.
4.What can be inferred from the last two paragraphs?
A. We should choose fruit from markets as often as possible.
B. The peaches, plums and nectarines should always be put together to get riper.
C. The fruit in afruit bowl or in a paper bag should be eaten as soon as possible.
D. We should not place any ripening fruit out in direct sunlight.
高三英语阅读理解中等难度题
Companion planting is the idea that when some crops are planted together, they help each other grow. The compatible plants generally have similar needs for nutrients, soil and moisture.
Advice for companion plantings is sometimes based more on tradition than proof. But Fabian Fernandez at the University of Illinois says there is evidence for some combinations. These can lead to better crops, reduce disease and help with pest control by attracting helpful insects. For example, some kinds of soil bacteria take nitrogen(氮) from the air and make a form that plants can use. The plants keep the nitrogen in their roots. Legumes(豆类) are especially good at this. Any crops sharing the same space can get the nitrogen as the roots decompose(腐烂).
Crops like beans and potatoes, carrots and cabbages, beans and rice can also share territory well because their roots reach different levels in the soil. Deep-rooted vegetables get nutrients and moisture from lower down, so they do not compete with shallower plants. But some plants placed together may harm each other's development. For example, tomatoes do not like wet soil but watercress does, as the name suggests. So you would probably not want to put them together.
Even after harvest, some kinds of produce should be kept apart. Apples, for example, release ethylene gas,a plant hormone. It can cause other foods to ripen(成熟)too quickly. Markets often separate high ethylene-producing foods from those that are sensitive to the gas. But sometimes you might want them together. For example, if you put an apple in a bag with a green banana, the banana will be ready to eat sooner.
Now what about peaches, plums and nectarines that are too firm to eat? Growers in California answer this question at eatcaliforniafruit.com. They say an apple,a banana or a riper piece of fruit is not needed. The peaches, plums and nectarines themselves release enough of the gas to ripen successfully.
Here's their advice: place the fruit in afruit bowl or in a paper bag with the top folded over. Keep the fruit at room temperature. When the fruit is soft enough to your liking, either use it or place it in a refrigerator to stop further ripening.
1.What are the basic needs for companion planting?
A. Good old companions. B. Some kinds of soil bacteria.
C. Nutrients, soil and moisture. D. Helpful insects.
2.What does the underlined sentence in Paragraph 2 most probably mean?
A. To some extent, companion planting relies more on traditional experience.
B. In the field of companion planting, proof always speaks louder than tradition.
C. Traditional experience is much less reliable than scientific experiments.
D. Scientific researches have thrown light on the theory of companion planting.
3.According to the text, which group of plants are not suitable to be planted together?
A. Beans and potatoes. B. Tomatoes and watercress.
C. Carrots and cabbages. D. Beans and rice.
4.What can be inferred from the last two paragraphs?
A. We should choose fruit from markets as often as possible.
B. The peaches, plums and nectarines should always be put together to get riper.
C. The fruit in afruit bowl or in a paper bag should be eaten as soon as possible.
D. We should not place any ripening fruit out in direct sunlight.
高三英语阅读理解中等难度题查看答案及解析
Companion planting is the idea that some kinds of plants can help each other grow. Plants that are compatible together generally have similar needs in terms of nutrients, soil and moisture levels.
Advice about which plants are compatible is sometimes based more on tradition than proof. But experts say there is evidence to support certain combinations. These can improve harvests, reduce disease and help with pest control by attracting helpful insects.
For example, some kinds of soil bacteria take nitrogen from the air and make it into a form that plants can use. The plants hold the nitrogen in their roots. Legumes（豆科植物）are especially good at this nitrogen（氮）-fixing. Then any crops that share the same space with the legumes can get the nitrogen when the roots are broken down.
Beans and potatoes can also share territory well because their roots reach different levels in the soil. Deep-rooted vegetables get nutrients and moisture from lower down in the soil, so they do not complete with plants with shallower roots.
But some plants placed together may harm each other’s development. For example, tomatoes do not like wet soil but watercress does, so you would probably want to keep them separated.
Some kinds of produce should be kept apart even after being harvested. This is because of ethylene gas（乙烯气体）. Ethylene is a plant hormone（激素）that can cause some foods to ripen too quickly. Apples release ethylene gas. Apricots, melons and tomatoes also release a lot of ethylene. Some vegetable are easily affected by ethylene, including asparagus, broccoli, cabbage and cucumbers.
This risk of ripening too soon is why markets often separate high ethylene-producing foods from those that are sensitive to the gas. But if you put an apple in a bag with a green banana, the ethylene from the apple will make the banana ready to eat sooner.
What about peaches, plums and nectarines? These kinds of fruit do not need any help from an apple—they release enough ethylene to ripen themselves. But that does not mean there is no way to get the job done faster.
Growers suggest placing the fruit in a fruit bowl or in a paper bag with the top folded over. Keep the fruit at room temperature, out of direct sunlight. Once the fruit is soft enough, either use it or put it in the refrigerator to keep it from getting too ripe.
1.Companion planting refers to the idea that ________
A. some crops can grow together to benefit each other.
B. some crops have the similar needs of nutrients, soil and water level.
C. some plants can damage each other if grown together.
D. a good farming method to prevent natural disasters.
2.According to the text, ________cannot grow together.
A. beans and potatoes B. tomatoes and watercress
C. legumes and corns D. rice and sugarcane
3.What is the function of ethylene?
A. To improve the quality of fruits. B. To produce a poisonous gas.
C. To keep vegetables fresh. D. To make fruits ripe earlier.
4.The text is most likely to be taken from ________.
A. a newspaper of medicine B. a magazine of biology
C. a journal of agriculture D. a travel report
高三英语阅读理解中等难度题查看答案及解析
Scientists are working to develop crop plants that can reduce the amount of water used for agriculture. Almost sixty percent of the world’s freshwater withdrawals from rivers, lakes and other water resources go toward irrigating fields.
Scientists are using biotechnology as well as traditional breeding methods to develop water-saving crops to feed a growing world.
Thomas “Tommy” Carter is a plant scientist in North Carolina. He works for the Agricultural Research Service in the United States Department of Agriculture. He leads Team Drought, a group of researchers at five universities. They have been using conventional breeding methods to develop and test soybeans that can grow well under dry conditions.
Tommy Carter started working on drought-resistant soybeans in 1981. His research has taken him as far as China, where soybeans have been grown for thousands of years.
Farmers in the United States, however, have grown soybeans for only about a century. Tommy Carter says the soybeans they grow are for the most part genetically similar. More differences could better protect crops against climate changes that can reduce production. Those changes include water shortages which could increase from global warming.
The Agriculture Department has a soybean germplasm(胚质) collection, a collection of genetic material passed from one generation to the next. Members of Team Drought studied more than 2,500 examples from the collection.
They looked at ones from the home of soybeans, Asia. They searched for germplasms that could keep plants from weakening and wilting (凋谢)during hot, dry summers in the United States.
Tommy Carter says they found only five. But these slow-wilting lines, he says, produce four to eight bushels（英斗）more than normal soybeans under drought conditions. The yield depends on location and environment.
Scientists are also working on other plants that either use less water or use it better, or both. For example, companies like Monsanto, DuPont and Syngenta have been developing corn with reduced water needs. Monsanto expects to be ready in a few years to market its first corn seeds genetically engineered to resist drought.
1.According to the passage, scientists try to find out how to _______.
A. grow crops with less water
B. increase crop production
C. feed a growing world
D. save the world’s water resource
2.Why did Tommy Carter come to China?
A. He likes traveling.
B. China has a long history.
C. He’s doing research into soybeans.
D. He works for the Agricultural Research Service.
3.What’s inferred from the passage?
A. Climate changes lead to global warming.
B. Water shortages contribute to global warming.
C. Genetically different soybeans need much water to grow.
D. Genetically different soybeans help to fight against damaging climate changes.
4.What do we know about slow-wilting plants talked about in the passage?
A. They yield big profits.
B. They can grow in almost any climate.
C. They seem to be drought-resistant.
D. They need much water for their growth.
高三英语阅读理解中等难度题查看答案及解析
When looking for diet plans to gain muscle there are some great tips that can help you to ensure that you are eating to help you build the muscle that you want. Your diet is just as important as exercise when you attach importance to your diet, it can help you to reach your goal much faster.
You will find that you will eat lean meat almost daily. If you eat meat each day this can help you to keep your figure. The trick with beef is to find lean cuts and this is something that can provide you with protein. Fish and turkey will also be included in the diet. Chicken has some rules and you should always eat skinless and avoid frying.
Fiber is something that is not talked much about when looking for a muscle building diet, but this is basis part of the muscle building diet. Fiber has many benefits and will aid in digestion and help you to feel full. Oatmeal (燕麦片) is a great source of fiber, but you should avoid the premade oatmeal. Fruit and vegetables contain a lot of fiber and this can also aid in weight loss if this is a problem you are working on.
If you want to complete your workout more effectively, you need to make sure that you are drinking adequate amount of water each day. Your body is made up of water and you need to replenish (补充) this water source each day in order to be in the best shape. If you are completing a very intense workout, you will need to make sure that you are drinking even more water to stay hydrated(含水的).
When protein(乳清蛋白质) is a great way for busy individuals to get the protein they need on the go. You will use soy and tofu for sources of protein if you do not eat meat and this can be a wonderful alternative.
There are diet plans to gain muscle for every category. You can make minor adjustments to your diet that can have some great benefits.
1.What’s the best title of the passage?
A. Proper diets can help build your muscle
B. The diet is not as important as exercise
C. Diet plans are very important
D. Paying attention to your diet
2.When you eat chicken, you should always _______.
A. eat chicken with skin
B. eat baked chicken
C. not eat chicken with skin and the fried
D. not eat boiled chicken
3.What’s the main idea of Paragraph 3?
A. Oatmeal is a great source of fiber.
B. Fruit and vegetables contain a lot of fiber.
C. Losing weight needs fiber.
D. The function of fiber.
高三英语阅读理解中等难度题查看答案及解析
The olive is one of the oldest planted crops known to man and is still widely grown in the Mediterranean.An olive tree can have a life of 500 years and is strong enough to continue to grow if ever chopped to the ground.It takes up four years before the olive tree is ripe enough to bear fruit.
Olive trees originated in the Mediterranean region where there is the perfect climate for the olive tree planting.It is characterized by abundant sunshine year-round and hot,dry summers with an average temperature of 80°F.In winter,it rarely drops below 50°F.Olive trees were first planted by humans around 4000 BC in an area known as the Fertile Crescent.Before the areas became desert,countries such as modern-day Turkey and Iraq had a lush environment with soil that plants grow well.Archaeological findings suggest that farming began in the Fertile Crescent before 7000BC.Instead of living as hunter-gatherers,these early humans settled down and harvested native plants.They selected olive trees that produced larger and oilier olives than the wild trees.
Olives and olive oil became valuable trade items between societies and civilizations.People who moved from one place to another and traders from the Fertile Crescent introduced olive oil to Syria and Crete,which spread to Egypt,Greece,and Rome.It continued to migrate westward until olive trees were first introduced to Califomia between 1769 and 1785.
The olive tree and olive oil have important symbolism in each religion.In Christianity,a dove(鸽子)brought an olive branch to Noah as a symbol of peace and new life after God flooded the Earth.The Prophet Muhammad suggested the use of olive oil for medicinal(药用的) purposes and massage(按摩).
Olive oil has medicinal benefits.Olive oil has been used for health benefits.Regular eating olive oil can reduce the risk of cancers.It was used during the Spanish Civil War from 1808 to 1813 to treat cases of fever.In 1960,oleuropein(橄榄多酚)was removed from olive leaves,which helps with food poisoning.
1.If an olive tree is chopped to the ground,______.
| A．it can’t grow any more |
| B．it can produce more new ones |
| C．there is no doubt that it will die |
| D．it is able to grow back strongly |
2.What does the underlined word “lush”in para.2 probably mean?
| A．Of bad climate. | B．Changeable or unstable. |
| C．Extremely disadvantaged. | D．Growing thickly and strongly. |
3.We can learn from the first two paragraphs that_____.
| A．the olive tree can stand extreme cold |
| B．the olive tree enjoys the long sunshine |
| C．the olive is the oldest tree in the world |
| D．the climate of deserts suits the olive tree |
4.Which of the following is true according to the passage?
①Olive trees bear fruits every four years.
②Olive oil was a food production before 7000BC.
③In Muhammad,olive oil was used as medicine.
④Olive trees were introduced to California in the 18th century.
A.②③④ B. ①②③ C. ①③④ D. ①②④
5.What is this passage mainly about?
| A．The history of the olive tree. |
| B．The characteristic of the olive tree. |
| C．The origin and medicinal benefits of the olive tree. |
| D．The different symbols of the olive tree in each region. |
高三英语阅读理解中等难度题查看答案及解析
Some people claim________the rumor that some Egyptians are planning a 100,000 people anti-government protest．
A． to overhear B． to have overheard
C． having overheard D． to be overheard
高三英语单项填空中等难度题查看答案及解析
The idea that computers have some amount of “intelligence” is not new, says Ralph Haupter, the president of Microsoft Asia, pointing as far back as 1950 when computer pioneer Alan Turing asked whether machines can think. “So it has taken nearly 70 years for the right combination of factors to come together to move AI from concept to reality,” says Haupter.
It is predicted that the development of artificial intelligence will be the story of the coming generations, not just the coming year, but as 2019 gets underway, you’ll find AI will begin to touch your life in many ways according to some researchers.
“Personal assistant AIs will keep getting smarter. As our personal assistants learn more about our daily routines, I can imagine the day I need not to worry about preparing dinner. My AI knows what I like to eat, which days of the week I like to cook at home, and makes sure that when I get back from work all my groceries are waiting at my doorstep, ready for me to prepare that delicious meal I had been longing for.” ---Alecjandro Troccoli, senior research scientist, NVIDIA.
“Thanks to AI, the face will be the new credit card, the new driver’s license and the new barcode (条形码). Facial recognition is already completely transforming security with biometric capabilities being adopted, and seeing how technology and business are connected, like Amazon is with Whole Foods, I can see a near future where people will no longer need to stand in line at the store.” ---Georges Nahon, president, Orange Institute, a global research laboratory.
“2019 will be the year AI becomes real for medicine. By the end of the year we’re seeing solutions for population health, hospital operations and a broad set of clinical specialties quickly follow behind.” ---Mark Michalski, executive director, Massachusetts General Hospital.
1.What can we know about AI from the first two paragraphs?
A.People didn't expect AI to develop so rapidly.
B.The idea of AI just came up recently.
C.The concept of AI was put forward by Ralph Haupter.
D.It took more than 70 years to turn the concept into reality.
2.Who sees the future of AI doing housework instead of human being?
A.Alan Turing. B.Georges Nahon. C.Mark Michalski. D.Alejandro Troccoli.
3.What is Georges Nahon’s job?
A.Executive director of a hospital. B.President of a research laboratory.
C.Chairman of an energy corporation. D.Chief operating officer of a newspaper.
4.How is the passage developed?
A.By explaining cause and effect. B.By presenting research results.
C.By listing some predictions. D.By describing personal experiences.
高三英语阅读理解中等难度题查看答案及解析
The biggest problem for most plants, which ______ just get up and run away when threatened, is that animals like to eat them.
A. shan’t B. can’t C. needn’t D. mustn’t
高三英语单项填空中等难度题查看答案及解析
The biggest problem for most plants, which ______ just get up and run away when threatened, is that animals like to eat them．
A．can’t B．shan’t
C．needn’t D．mustn’t
高三英语单项填空简单题查看答案及解析
The biggest problem for most plants, which ______ just get up and run away when threatened, is that animals like to eat them．
A．can’t B．shan’t
C．needn’t D．mustn’t
高三英语单项填空中等难度题查看答案及解析