Exposed soil isn’t part of nature’s master pl...

Exposed soil isn’t part of nature’s master plan. Good examples where soil is naturally found with no plants growing in are beneath freshly removed trees, or where the ground has been burnt by a land fire. In these situations bare soil isn’t bare for long; within days seedlings (芽) begin to appear and cover the ground. In a few months’ time, the scar is hardly noticeable.

Unlike these natural examples, ploughed (耕犁) fields and freshly dug gardens are obvious examples created by man. But, left to nature, even these bare soils soon turn green with a large number of tiny seedlings. In fields, gardens and on grasslands, roadside and sports fields, along streets and on paths and pavements, we are constantly battling to stop weeds from growing. All we are doing is stop the recovering powers of nature.

Whenever soil is exposed, weeds act like a kind of medicine to reduce the potentially harmful rays of the sun, so the sooner plant growth covers the soil over again, the better.

Weeds also help to improve the fertility (肥沃) of the soil. Their roots get the soil together, improving its structure and creating a more stable environment in which soil life can grow fast. Those weeds with a deep root draw up plant nutrients from deeper in the ground, making them available to plants growing near the soil surface. Above ground, the stems (茎) of weeds help trap fallen leaves which break down into the soil, adding to the fertility of the soil.

As the soil becomes more fertile, different kinds of plants start to replace the “pioneering” weeds. Bushes move in to take the place by gradually shading them out, followed in turn by trees, which eventually push up through the bushes, finally shading them out too. Fallen leaves from the bushes and trees carry on the job of building soil fertility that was begun by those very first weeds that grew on the bare soil. Then, when one of these mature trees is removed in a storm, leaving a wound of bare soil in the earth, the whole process starts again.

1.When will soil be left bare?

A. A land fire has just happened.　　 B. A young tree is planted in.

C. No one ploughs the land.　　 D. No crops are planted in.

2.Which of the following prevents the bare soil from recovering?

A. Seedlings appearing in gardens.

B. Reducing harmful rays of the sun.

C. Removing weeds from pavements.

D. Replacing plants in sports fields.

3.What can weeds do for the soil?

A. They create soil life.

B. They help improve the soil.

C. They get nutrients from the sun.

D. They break down fallen leaves.

4.How can the soil remain fertile after trees move in?

A. By adding more weeds to the soil.

B. By taking out the weeds constantly.

C. By removing the previous bushes.

D. By making use of the fallen leaves.

高三英语阅读理解困难题查看答案及解析

Culture helps human societies survive in changing natural environment．For example, the end of the last Ice Age, beginning about 15,000 years ago, brought a big challenge to which humans had to adapt．Before this time, large parts of the northern hemisphere were covered in great sheets of ice that contained much of the earth' s water．In North America, large animals that wandered the vast tundra （冰原） provided people with food and materials for clothing and simple shelters．When the earth became warm, large Ice Age animals disappeared, and many land areas were covered by rising sea levels from melting ice．But people survived, they developed new technologies and learned how to survive on new plant and animal species． Finally some people settled into permanent villages, durable houses and farms．

Cultural adaptation has made humans one of the most successful species on the planet． Through history, major developments in technology, medicine, and nutrition have allowed people to reproduce and survive in ever-increasing numbers．The global population has risen from 8 million during the Ice Age to about 6 billion today．

However, the successes of culture adaptation can also create problems in the long run．Over the last 200 years, people have begun to use large quantities of natural resources and energy and to produce a great amount of material and chemical wastes．The global population now consumes some important natural resources—such as petroleum, wood, and minerals—faster than nature can produce them．Many scientists believe that in the process of burning fuels and producing wastes, people may be changing the global climate in unpredictable and possibly harmful ways．Thus, the adaptive success of the present-day global culture of production and trade may be temporary．

1.What is the first paragraph mainly talking about?

2.To deal with the problems, human beings should ______according to the passage．

3.Which of the following is the problem caused by cultural adaptation according to the passage?

4.Which of the following can be the best tide of the passage?

高三英语阅读理解中等难度题查看答案及解析

Satellites(卫星) are an important part of our ordinary lives．For example, the information for weather forecasts is sent by satellite．Some satellites have cameras which take photographs of the Earth to show how clouds are moving．Satellites are also used to connect our international phone calls．

Computer connections of the World Wide Web and Internet also use satellites. Many of our TV programs come to us through satellites．Airplane pilots also sometimes use a satellite to help them find their exact location．

We use satellites to send television pictures from one part of the world to another．They are usually 35，880 kilometers above the equator（赤道）．Sometimes we can see a satellite in the sky and it seems to stay in the same place．This is because it is moving around the world at 11，000 kilometers an hour—exactly the same speed that the earth rotates．A satellite must orbit the Earth with its antennae(天线)facing the earth．Sometimes, it moves away from its orbit（轨道），So there are little rockets on it which are used to put the satellite back in the right position．This usually happens about every five or six days．

Space is not empty! Every week, more and more satellites are sent into space to orbit the Earth．A satellite usually works for about 10-12 years．Satellites which are broken are sometimes repaired by astronauts or sometimes brought back to Earth to be repaired．Often，very old or broken satellites are left in space to orbit the Earth for a very long time．This is very serious because some satellites use nuclear power and they can crash（撞）into each other．

1.Which of the following is NOT done by satellites according to the passage?

A.Sending information for weather forecast．

B.Taking photographs of the Earth．

C.Sending TV pictures．

D.Providing food for airplane pilots．

2.What’s the speed the earth rotates at?

A.35,880 kilometers per hour．

B.335,880 kilometers per hour．

C.11,000 kilometers per hour．

D.110,000 kilometers per hour

3.Why does the satellite move around the world at the same speed as the Earth rotates?

A.In order to take photographs．

B.In order to stay in a certain position in the orbit．

C.In order to move away from its orbit．

D.In order to send television pictures．

4.What does the underlined word “This” in the 3rd paragraph refer to?

A.A satellite．

B.A little rocket．

C.A satellite seems to stay in the same place in the sky．

D.The satellite puts the rockets in the right position．

高三英语阅读理解中等难度题查看答案及解析

_______ is part of children’s nature. They always insist on getting to the bottom of everything.

A. Motivation B. Imitation

C. Generosity D. Curiosity

高三英语单项填空中等难度题查看答案及解析

Coconut oil has become popular as healthier oil in cooking, cleaning and even as part of a natural beauty product．At room temperature except in warmer climates, it hardens, but naturally becomes liquid as the temperature rises．　　　 1.

Healthy fat is an important part of the diet, and coconut oil is one source of the healthy fat．Coconut oil is also nature’s richest source of medium-chain fatty acids （脂肪酸）．This oil’s health benefits include, but are not limited to, improving heart health, helping chemical reactions on our body, keeping a healthy weight, helping weight loss and supporting the immune system．　　　 2.

Coconut oil is all-natural and does not contain the chemicals you will find in most shampoos and body washes．It is a wonderful body wash that can be applied directly to your skin to keep your skin wet．　　　　 3.　　　 Using it in your mouth for twenty minutes is a much better method of cleaning the entire mouth and removing bacteria．

Strong chemical cleaners are not safe or healthy for you, your family or the environment． ___4. It can be used to clean and shine furniture or leather．You can even use coconut oil as a spot remover．

5.　　　　 Do you use it for cooking, cleaning or as a natural beauty product?

A．It can also take the place of mouth-wash．

B．Instead, clean with greener methods, like coconut oil．

C．There are a number of health benefits of using this oil in your daily life．

D．How do you use coconut oil in everyday life?

E．Coconut oil removes more bacteria．

F．So you can replace most of your cooking oils with coconut oil for better health．

G．It can change our immune system．

高三英语信息匹配中等难度题查看答案及解析

Coconut oil has become popular as healthier oil in cooking, cleaning and even as part of a natural beauty product. At room temperature except in warmer climates, it hardens, but naturally becomes liquid as the temperature rises.　　　 1. Healthy fat is an important part of the diet,

and coconut oil is one source of the healthy fat. Coconut oil is also nature’s richest source of medium-chain fatty acids (脂肪酸). This oil’s health benefits include, but are not limited to, improving heart health, helping chemical reactions on our body, keeping a healthy weight, helping weight loss and supporting the immune system. 　　 2.

Coconut oil is all-natural and does not contain the chemicals you will find in most shampoos and body washes. It is a wonderful body wash that can be applied directly to your skin to keep your skin wet. 　　　 3.　　　 Using it in your mouth for twenty minutes is a much better method of cleaning the entire mouth and removing bacteria.

Strong chemical cleaners are not safe or healthy for you, your family or the environment.　　　　 _____4.　　　　 It can be used to clean and shine furniture or leather. You can even use coconut oil as a spot remover.

5.　　 Do you use it for cooking, cleaning or as a natural beauty product?

A. It can also take the place of mouth-wash.

B. Instead, clean with greener methods, like coconut oil.

C. There are a number of health benefits of using this oil in your daily life.

D. How do you use coconut oil in everyday life?

E. Coconut oil removes more bacteria.

F. So you can replace most of your cooking oils with coconut oil for better health.

G. It can change our immune system.

高三英语其他题中等难度题查看答案及解析

Coconut oil has become popular as healthier oil in cooking, cleaning and even as part of a natural beauty product．At room temperature except in warmer climates, it hardens, but naturally becomes liquid as the temperature rises．　　 1.

Healthy fat is an important part of the diet, and coconut oil is one source of the healthy fat．Coconut oil is also nature’s richest source of medium-chain fatty acids（脂肪酸）．This oil’s health benefits include, but are not limited to, improving heart health, helping chemical reactions on our body, keeping a healthy weight, helping weight loss and supporting the immune system．　　 2.

Coconut oil is all-natural and does not contain the chemicals you will find in most shampoos and body washes．It is a wonderful body wash that can be applied directly to your skin to keep your skin wet．　　　 3.　　　　 Using it in your mouth for twenty minutes is a much better method of cleaning the entire mouth and removing bacteria．

Strong chemical cleaners are not safe or healthy for you, your family or the environment． __4.　 It can be used to clean and shine furniture or leather．You can even use coconut oil as a spot remover．

5.　　　　 Do you use it for cooking, cleaning or as a natural beauty product?

A．It can also take the place of mouth-wash．

B．Instead, clean with greener methods, like coconut oil．

C．There are a number of health benefits of using this oil in your daily life．

D．How do you use coconut oil in everyday life?

E．Coconut oil removes more bacteria．

F．So you can replace most of your cooking oils with coconut oil for better health．

G．It can change our immune system．

高三英语其他题中等难度题查看答案及解析

Coconut oil has become popular as healthier oil in cooking, cleaning and even as part of a natural beauty product. At room temperature except in warmer climates, it hardens, but naturally becomes liquid as the temperature rises.　　　　 1.

Healthy fat is an important part of the diet, and coconut oil is one source of the healthy fat. Coconut oil is also nature’s richest source of medium-chain fatty acids (脂肪酸). This oil’s health benefits include, but are not limited to, improving heart health, helping chemical reactions on our body, keeping a healthy weight, helping weight loss and supporting the immune system. 　　　 2.　　　　

Coconut oil is all-natural and does not contain the chemicals you will find in most shampoos and body washes. It is a wonderful body wash that can be applied directly to your skin to keep your skin wet. 　　　　 3.　　 Using it in your mouth for twenty minutes is a much better method of cleaning the entire mouth and removing bacteria.

Strong chemical cleaners are not safe or healthy for you, your family or the environment.　　　　 ______4.　　 It can be used to clean and shine furniture or leather. You can even use coconut oil as a spot remover.

5.　　 Do you use it for cooking, cleaning or as a natural beauty product?

A. It can also take the place of mouth-wash.

B. Instead, clean with greener methods, like coconut oil.

C. There are a number of health benefits of using this oil in your daily life.

D. How do you use coconut oil in everyday life?

E. Coconut oil removes more bacteria.

F. So you can replace most of your cooking oils with coconut oil for better health.

G. It can change our immune system.

高三英语其他题中等难度题查看答案及解析

Taking drugs has become part of every sport _________ athletes seek to achieve beyond their natural limits.

A. which　　　　　　　　 B. that

C. who　　　　　　　　　 D. where

高三英语单项填空中等难度题查看答案及解析

Taking drugs has become part of every sport _________ athletes seek to achieve beyond their natural limits.

A．which    B．that    C．who    D．where

高三英语单项填空中等难度题查看答案及解析