The world has a fast growing population and p...

The world has a fast growing population and people need more land for houses, factories, highways, and so on. The farmland is decreasing with each passing day. How to meet the need of feeding the growing population? One way is to introduce some high-output gene into a crop to enable it to produce more. Biologists over the years have discovered genes which can raise output of the crops, resist pests, improve taste, etc.

However, in many western countries there is widespread concern over the safety of“Genetically Modified”(GM) (转基因) foods, because they think there may be serious problems of environment, health, safety, morality and so on.

As a scientist I must admit GM foods involve great risks to humans. In fact in Europe they’re called “Frankenstein foods” by many. Frankenstein is a character in a novel. He was a very clever scientist. He created a monster（怪物）, which eventually killed him.

Soybeans can be made into many foods. However, it’s hard to trace them. Therefore, it’s very important we have to make sure the soybean, if genetically modified, is free from any poisonous matter harmful to human beings. For this we need very good testing. We do have some testing on some animals, but no completely satisfactory testing has ever been made so far. They’re entirely new, and their problems are entirely unknown. It takes time to develop persuasive tests to know whether they’re harmful to us or not.

We may not be able to tell what may happen if we take GM foods. Some of them may be resistant to antibiotics (抗生素). Then many of the medicines we have today will have no effect on people eating GM foods.

A more likely case is the GM foods may contain genes some people are allergic to.

GM products have already come into our lives but most people even know nothing about it.

At least we have to be clear about what we are eating. The China Consumers Association is calling for labeling (标注) on GM foods so that consumers will know before they buy them.

1.The chief purpose of developing GM foods is to_______.

A. feed the fast growing population

B. make the foods much cheaper

C. make the foods much tastier

D. kill pests on the crops

2.From the passage we can infer that _____.

A. many Europeans reject GM foods

B. GM foods are very popular in Europe

C. Frankenstein foods can make people clever

D. Frankenstein was a scientist creating GM foods

3.The underlined phrase “trace them” in Paragraph 4 probably means“　　　　 ”.

A. find their market　　　　　　　　　　　　　 B. raise their quality

C. find their origins　　　　　　　　　　　　 D. enjoy their taste

4.Which of the following is TRUE about GM foods?

A. The testing shows GM soybean foods are free from poisonous matter.

B. Sometimes consumers can hardly tell GM soybeans from natural ones.

C. GM foods prove to be safe to humans after some testing on animals.

D. GM foods problems have been known after testing on animals.

5.What can we learn from the passage?

A. GM foods make antibiotics fail to function properly.

B. People eating GM foods will suffer from food allergies.

C. As GM foods are safe at present, they’re certainly safe later on.

D. People should be informed of which foods are GM foods.

高三英语阅读理解中等难度题查看答案及解析

The world has a fast growing population and people need more land for houses, factories, highways, and so on. The farmland is decreasing with each passing day. How to meet the need of feeding the growing population? One way is to introduce some high-output gene into a crop to enable it to produce more. Biologists over the years have discovered genes which can raise output of the crops, resist pests, improve taste, etc.

However, in many western countries there is widespread concern over the safety of “Genetically Modified”(GM) (转基因) foods, because they think there may be serious problems of environment, health, safety, morality and so on.

As a scientist I must admit GM foods involve great risks to humans. In fact in Europe they’re called “Frankenstein foods” by many. Frankenstein is a character in a novel. He was a very clever scientist. He created a monster（怪物）, which eventually killed him.

Soybeans﹙大豆﹚ can be made into many foods. However, it’s hard to trace them. Therefore, it’s very important we have to make sure the soybean, if genetically modified, is free from any poisonous matter harmful to human beings. For this we need very good testing. We do have some testing on some animals, but no completely satisfactory testing has ever been made so far. They’re entirely new, and their problems are entirely unknown. It takes time to develop persuasive tests to know whether they’re harmful to us or not.

We may not be able to tell what may happen if we take GM foods. Some of them may be resistant to antibiotics (抗生素). Then many of the medicines we have today will have no effect on people eating GM foods.

A more likely case is the GM foods may contain genes some people are allergic﹙过敏的﹚to.

GM products have already come into our lives, but most people even know nothing about it.

At least we have to be clear about what we are eating. The China Consumers Association is calling for labeling (标注) on GM foods so that consumers will know before they buy them.

1. The chief purpose of developing GM foods is to_______.

A. make the foods much tastier

B. make the foods much cheaper

C. feed the fast growing population

D. kill pests on the crops

2.From the passage we can infer that 　　　　 .

A. Frankenstein was a scientist creating GM foods

B. GM foods are very popular in Europe

C. Frankenstein foods can make people clever

D. many Europeans reject GM foods

3.The underlined phrase “trace them” in Paragraph 4 probably means“　　　　 ”.

A. find their market　　　 B. find their origins

C. raise their quality　　 D. enjoy their taste

4.Which of the following is TRUE about GM foods?

A. The testing shows GM soybean foods are free from poisonous matter.

B. GM foods problems have been known after testing on animals.

C. GM foods prove to be safe to humans after some testing on animals.

D. Sometimes consumers can hardly tell GM soybeans from natural ones.

5. What can we learn from the passage?

A. People should be informed of which foods are GM foods.

B. People eating GM foods will suffer from food allergies.

C. As GM foods are safe at present, they’re certainly safe later on.

D. GM foods make antibiotics fail to function properly.

高三英语阅读理解中等难度题查看答案及解析

As the world’s population grows, farmers will need to produce more and more food. And large farms are increasingly using precision farming to increase yields (产量), reduce waste, and reduce the economic and security risks that inevitably accompany agricultural uncertainty.

Traditional farming relies on managing entire fields—making decisions related to planting, harvesting, irrigating, and applying pesticides and fertilizer (农药和化肥)—based on regional conditions and historical data. Precision farming, by contrast, combines sensors, robots, GPS, mapping tools and data-analytics software to customize（量身定制）the care that plants receive without increasing labor. Robot-mounted sensors and camera-equipped drones (无人机) wirelessly send images and data on individual plants to a computer, which looks for signs of health and stress. Farmers receive the feedback in real time and then deliver water, pesticide or fertilizer in adjusted doses（剂量）to only the areas that need it. The technology can also help farmers decide when to plant and harvest crops.

As a result, precision farming can improve time management, reduce water and chemical use, and produce healthier crops and higher yields—all of which benefit farmers’ bottom lines and conserve resources while reducing chemical runoff.

Many small businesses are developing new software, sensors, and other tools for precision farming, as are large companies such as Monsanto, John Deere, Bayer, Dow and DuPont. The U.S. Department of Agriculture, NASA and the National Oceanic and Atmospheric Administration all support precision farming, and many colleges now offer course work on the topic.

In a related development, seed producers are applying technology to improve plant characteristics. By following individual plants over time and analyzing which ones flourish in different conditions, companies can relate the plants’ response to their environments with their genomics (基因组学). That information, in turn, allows the companies to produce seed varieties that will grow well in specific soil and weather conditions. This advanced technology may also help to improve crop nutrition.

Farmers do not universally welcome precision agriculture for various reasons, such as high equipment costs and lack of access to the Internet. The technology may bring great challenges to experienced farmers who are not good at computers. And large systems will also be beyond the reach of many small farming operations in developing nations. But less expensive, simpler systems could potentially be applied. For others, though, cost savings in the long run may reduce the financial concerns. And however reticent some farmers may be to adopt new technology, the next generation of farmers are likely to warm to the approach.

1.Precision farming differs from traditional farming partly because it ________.

A. guarantees high yields with more labor

B. relies on regional conditions and historical data

C. offers plenty of water, pesticides and fertilizer

D. provides real time information about target crops

2.About precision farming, we can learn that________.

A. the government holds a cautious attitude

B. it draws positive responses from businesses

C. seed producers have already made huge profits

D. large systems will soon be built in developing nations

3.The underlined word “reticent” in the last paragraph probably means ________.

A. disappointed　　 B. confused

C. unwilling　　 D. shocked

4.What is the best title for the passage?

A. Precision Farming Increases Crop Yields

B. More Challenges Faced by Modern Farmers

C. Development of Farming Systems in the U.S.

D. Traditional Farming is Gradually Disappearing

高三英语阅读理解困难题查看答案及解析

As the world’s population continues to grow, the ___of food becomes more and more of a concern.

A．worth            B．supply            C．package           D．list

高三英语单项填空中等难度题查看答案及解析

(2013·浙江，4)As the world's population continues to grow，the ________ of food becomes more and more of a concern.

A．worth　 B．supply　 C．package　 D．list

高三英语单项填空中等难度题查看答案及解析

As the world’s population continues to grow, the ___of food becomes more and more of a concern.

A. worth         B. supply          C. package         D. list

高三英语单项填空中等难度题查看答案及解析

(2013·高考浙江卷)As the world’s population continues to grow，the ________ of food becomes more and more of a concern.

A．worth　　     B．supply

C．package　　     D．list

高三英语单项填空中等难度题查看答案及解析

As the world’s population continues to grow，the ________ of food becomes more and more of a concern.                　　　　　　　　　 　　　　　　　　　 　　　　　　　　　 　　　　　　　　　 　　　　　　　　　 　　　　　　　　　 　　　　　　　　　 　　　　　　　　　 　　　　　　　　　 　　　　　　　　　 (2013·浙江，4)

A．worth　                         B．supply

C．package　                         D．list

高三英语单项填空简单题查看答案及解析

The need to feed a growing population is putting much pressure on the world's supply of water. With 97% of the world's water too salty to be drunk or used in agriculture, the worldwide supply of water needs careful management, especially in agriculture. Although the idea of a water shortage(短缺)seems strange to someone fortunate enough to live in a high rainfall country, many of the world's agricultural industries experience constant water shortages.

Although dams can be built to store water for agricultural use in dry areas and dry seasons, the costs of water redistribution(重新分配)are very high. Not only is there the cost of the engineering itself, but there is also an environmental cost to be considered. Where valleys(山谷)are flooded to create dams, houses are lost and wildlife homes destroyed. Besides, water may flow easily through pipes to fields, but it cannot be transported from one side of the world to the other. Each country must therefore rely on the management of its own water to supply its farming requirements.

This is particularly troubling for countries with agricultural industries in areas dependent on irrigation (灌溉). In Texas, farmers' overuse of irrigation water has resulted in a 25% reduction of the water stores. In the Central Valley area of southwestern USA, a huge water engineering project provided water for farming in dry valleys, but much of the water use has been poorly managed.

Saudi Arabia's attempts to grow wheat in desert areas have seen the pumping of huge quantities of irrigation water from underground reserves. Because there is no rainfall in these areas, such reserves can only decrease, and it is believed that fifty years of pumping will see them run dry.

1.What is most likely to be discussed in the paragraph that follows?

2.From the first two paragraphs we learn that________.

3.The text is mainly about________.

高三英语阅读理解极难题查看答案及解析

The need to feed a growing population is putting much pressure on the world’s supply of water. With 97% of the world’s water too salty to be drunk or used in agriculture, the worldwide supply of water needs careful management, especially in agriculture. Although the idea of a water shortage（短缺）seems strange to someone fortunate enough to live in a high rainfull country, many of the world’s agricultural industries experience constant water shortages.

Although dams can be built to store water for agricultural use in dry areas and dry seaons, the costs of water redistribution(重新分配)are very high. Notonly is there the cost of the engineering itself, but there is also an environmental cost to be considered. Where valleys(山谷)are flooded to create dams, houses are lost and wildlife homes destroyed. Besides, water many flow easily through pipes to fields,but it cannot be transported from one side of the world to the other. Each country must therefore rely on the management of its own water to supply its farming requirements.

This is particularly troubling ro countries with agricultural industries in areas dependent on irrigation（灌溉）. In Texas, farmers’ overuse of irrigation water be resulted in a 25% redcution of the water stores. In the Central Valley area of south eastern USA, a huge water engineering project provided water for farming in dry vallege, but much of the water use has been poorly managed.

Saudi Arabia’s attempts to grow wheat in desert areas have been the pumping of huge quantities of irrigation water from underground reserves. Because there is no rainfall in these areas, such reserves can only decrease, and it is believed that fifty years of pumping will see them run dry.

1. From the first two paragraphs we learnt that _______.

A.much of the world’s water is available for use

B.people in high rainfll countries feel lucky

C.the costs of water redistribution should be considered

D.water can be easily carried through pipes across the world

2.Which of the following is true?

A.The water  in Texas have been reduced by 75%.

B.Most industries in the world suffer from water shortagers.

C.The underground water in Saudi Arabia might run out in 50 years.

D.Good management of water use resulted from the project in the Central Valley.

3.What is most likely to be discussed in the paragreh that follows?

A.Steps to improving water use managet.

B.Ways tor redjuce the costs of builing dams.

C.Measured to dmal with worldwide water shortages.

D.Appmihes to handling the pressure on water supply.

4.The text is mainly about____________.

A.water supply and increasing population

B.water use management and agriculture

C.water redistribution and wildlife protection

D.water shornages and environmental protection.

高三英语阅读理解简单题查看答案及解析