What can we learn from the last paragraph? A. Fighting wastefulness is difficult. B. Needless material is mostly recycled. C. People like collecting recyclable waste. D. The author is proud of their consumer culture. C Batteries can power anything from small sensors to large systems. While scientists are finding ways to make them smaller but even more powerful, problems can arise when these batteries are much larger and heavier than the devices themselves. University of Missouri(MU) researchers are developing a nuclear energy source that is smaller, lighter and more efficient. “To provide enough power, we need certain methods with high energy density .said Jae Kwon, assistant professor of electrical and computer engineering at MU. “The radioisotope battery can provide power density that is much higher than chemical batteries. Kwon and his research team have been working on building a small nuclear battery, presently the size and thickness of a penny, intended to power various micro / nanoelectromechanical systems . Although nuclear batteries can cause concerns, Kwon said they are safe. “People hear the word `nuclear’ and think of something very dangerous, he said, “However, nuclear power sources have already been safely powering a variety of devices, such as pace-makers, space satellites and underwater systems. His new idea is not only in the battery’s size, but also in its semiconductor. Kwon’s battery uses a liquid semiconductor rather than a solid semiconductor. “The key part of using a radioactive battery is that when you harvest the energy, part of the radiation energy can damage the lattice structure of the solid semiconductor, Kwon said, “By using a liquid semiconductor, we believe we can minimize that problem. Together with J. David Robertson, chemistry professor and associate director of the MU Research Reactor, Kwon is working to build and test the battery. In the future, they hope to increase the battery’s power, shrink its size and try with various other materials. Kwon said that battery could be thinner than the thickness of human hair. 查看更多

 

题目列表(包括答案和解析)

Ask someone what they have done to help the environment recently and they will almost certainly mention recycling. Recycling in the home is very important of course. However, being forced to recycle often means we already have more material than we need. We are dealing with the results of that over-consumption in the greenest way possible, but it would be far better if we did not need to bring so much material home in the first place.

The total amount of packaging increased by 12% between 1999 and 2005. It now makes up a third of a typical household’s waste in the UK. In many supermarkets nowadays food items are packaged twice with plastic and cardboard.

Too much packaging is doing serious damage to the environment. The UK, for example, is running out of it for carrying this unnecessary waste. If such packaging is burnt, it gives off greenhouse gases which go on to cause the greenhouse effect. Recycling helps, but the process itself uses energy. The solution is not to produce such items in the first place. Food waste is a serious problem, too. Too many supermarkets encourage customers to buy more than they need. However, a few of them are coming round to the idea that this cannot continue , encouraging customers to reuse their plastic bags, for example.

But this is not just about supermarkets. It is about all of us. We have learned to associate packaging with quality. We have learned to think that something unpackaged is of poor quality. This is especially true of food. But is also applies to a wide range of consumer products, which often have far more packaging than necessary.

There are signs of hope. As more of us recycle, we are beginning to realise just how much unnecessary material are collecting. We need to face the wastefulness of our consumer culture, but we have a mountain to climb.

1.The author uses figures in Paragraph 2 to show _______.

A.the tendency of cutting household waste

B.the increase of packaging recycling

C.the rapid growth of super markets

D.the fact of packaging overuse

2.What can be inferred from Paragraph 4?

A.Unpackaged products are of bad quality.

B.Supermarkets care more about packaging.

C.It is improper to judge quality by packaging.

D.Other products are better packaged than food.

3.What can we learn from the last paragraph?

A.Fighting wastefulness is difficult.

B.Needless material is mostly recycled.

C.People like collecting recyclable waste.

D.The author is proud of their consumer culture.

4.According to the text, recycling ______.

A.helps control the greenhouse effect

B.means burning packaging for energy

C.is the solution to gas shortage

D.leads to a waste of land

5.What does the underlined phrase “over-consumption” refer to?

A.Using too much packaging.

B.Recycling too many wastes.

C.Making more products than necessary.

D.Having more material than is needed.

 

查看答案和解析>>

Ask someone what they have done to help the environment recently and they will almost certainly mention recycling. Recycling in the home is very important of course. However, being forced to recycle often means we already have more material than we need. We are dealing with the results of that over-consumption in the greenest way possible, but it would be far better if we did not need to bring so much material home in the first place.
The total amount of packaging increased by 12% between 1999 and 2005. It now makes up a third of a typical household’s waste in the UK. In many supermarkets nowadays food items are packaged twice with plastic and cardboard.
Too much packaging is doing serious damage to the environment. The UK, for example, is running out of it for carrying this unnecessary waste. If such packaging is burnt, it gives off greenhouse gases which go on to cause the greenhouse effect. Recycling helps, but the process itself uses energy. The solution is not to produce such items in the first place. Food waste is a serious problem, too. Too many supermarkets encourage customers to buy more than they need. However, a few of them are coming round to the idea that this cannot continue , encouraging customers to reuse their plastic bags, for example.
But this is not just about supermarkets. It is about all of us. We have learned to associate packaging with quality. We have learned to think that something unpackaged is of poor quality. This is especially true of food. But is also applies to a wide range of consumer products, which often have far more packaging than necessary.
There are signs of hope. As more of us recycle, we are beginning to realise just how much unnecessary material are collecting. We need to face the wastefulness of our consumer culture, but we have a mountain to climb.
【小题1】The author uses figures in Paragraph 2 to show _______.

A.the tendency of cutting household waste
B.the increase of packaging recycling
C.the rapid growth of super markets
D.the fact of packaging overuse
【小题2】What can be inferred from Paragraph 4?
A.Unpackaged products are of bad quality.
B.Supermarkets care more about packaging.
C.It is improper to judge quality by packaging.
D.Other products are better packaged than food.
【小题3】What can we learn from the last paragraph?
A.Fighting wastefulness is difficult.
B.Needless material is mostly recycled.
C.People like collecting recyclable waste.
D.The author is proud of their consumer culture.
【小题4】According to the text, recycling ______.
A.helps control the greenhouse effect
B.means burning packaging for energy
C.is the solution to gas shortage
D.leads to a waste of land
【小题5】What does the underlined phrase “over-consumption” refer to?
A.Using too much packaging.
B.Recycling too many wastes.
C.Making more products than necessary.
D.Having more material than is needed.

查看答案和解析>>

Ask someone what they have done to help the environment recently and they will almost certainly mention recycling. Recycling in the home is very important of course. However, being forced to recycle often means we already have more material than we need. We are dealing with the results of that over-consumption in the greenest way possible, but it would be far better if we did not need to bring so much material home in the first place.

The total amount of packaging increased by 12% between 1999 and 2005. It now makes up a third of a typical household’s waste in the UK. In many supermarkets nowadays food items are packaged twice with plastic and cardboard.

Too much packaging is doing serious damage to the environment. The UK, for example, is running out of it for carrying this unnecessary waste. If such packaging is burnt, it gives off greenhouse gases which go on to cause the greenhouse effect. Recycling helps, but the process itself uses energy. The solution is not to produce such items in the first place. Food waste is a serious problem, too. Too many supermarkets encourage customers to buy more than they need. However, a few of them are coming round to the idea that this cannot continue, encouraging customers to reuse their plastic bags, for example.

But this is not just about supermarkets. It is about all of us. We have learned to associate packaging with quality. We have learned to think that something unpackaged is of poor quality. This is especially true of food. But it also applies to a wide range of consumer products, which often have far more packaging than necessary.

There are signs of hope. As more of us recycle, we are beginning to realize just how much unnecessary materials are collecting. We need to face the wastefulness of our consumer culture, but we have a mountain to climb.

What does the underlined phrase “over-consumption” refer to?

A. Using too much packaging.                      B. Recycling too many wastes.

C. Making more products than necessary.    D. Having more material than is needed.

The author uses figures in Paragraph 2 to show _______.

A. the tendency of cutting household waste         B. the increase of packaging recycling

C. the rapid growth of super markets                   D. the fact of packaging overuse

According to the text, recycling ______.

A. helps control the greenhouse effect                

B. means burning packaging for energy

C. is the solution to gas shortage                        

D. leads to a waste of land

What can we learn from the last paragraph?

A. Fighting wastefulness is difficult.       

B. Needless material is mostly recycled.

C. People like collecting recyclable waste.   

D. The author is proud of their consumer culture.

查看答案和解析>>

Ask someone what they have done to help the environment recently and they will almost certainly mention recycling. Recycling in the home is very important of course. However, being forced to recycle often means we already have more material than we need. We are dealing with the results of that over-consumption in the greenest way possible, but it would be far better if we did not need to bring so much material home in the first place.

The total amount of packaging increased by 12% between 1999 and 2005. It now makes up a third of a typical household’s waste in the UK. In many supermarkets nowadays food items are packaged twice with plastic and cardboard.

Too much packaging is doing serious damage to the environment. The UK, for example, is running out of it for carrying this unnecessary waste. If such packaging is burnt, it gives off greenhouse gases which go on to cause the greenhouse effect. Recycling helps, but the process itself uses energy. The solution is not to produce such items in the first place. Food waste is a serious problem, too. Too many supermarkets encourage customers to buy more than they need. However, a few of them are coming round to the idea that this cannot continue, encouraging customers to reuse their plastic bags, for example.

But this is not just about supermarkets. It is about all of us. We have learned to associate packaging with quality. We have learned to think that something unpackaged is of poor quality. This is especially true of food. But it also applies to a wide range of consumer products, which often have far more packaging than necessary.

There are signs of hope. As more of us recycle, we are beginning to realize just how much unnecessary materials are collecting. We need to face the wastefulness of our consumer culture, but we have a mountain to climb.

44. What does the underlined phrase “over-consumption” refer to?

A. Using too much packaging.                           B. Recycling too many wastes.

C. Making more products than necessary.      D. Having more material than is needed.

45. The author uses figures in Paragraph 2 to show _______.

A. the tendency of cutting household waste            B. the increase of packaging recycling

C. the rapid growth of super markets                        D. the fact of packaging overuse

46. According to the text, recycling ______.

A. helps control the greenhouse effect                    

B. means burning packaging for energy

C. is the solution to gas shortage                              

D. leads to a waste of land

47. What can we learn from the last paragraph?

A. Fighting wastefulness is difficult.                

B. Needless material is mostly recycled.

C. People like collecting recyclable waste.     

D. The author is proud of their consumer culture.

查看答案和解析>>

Ask someone what they have done to help the environment recently and they will almost certainly mention recycling. Recycling in the home is very important of course. However, being forced to recycle often means we already have more material than we need. We are dealing with the results of that over-consumption in the greenest way possible, but it would be far better if we did not need to bring so much material home in the first place.

   The total amount of packaging increased by 12% between 1999 and 2005. It now makes up a third of a typical household’s waste in the UK. In many supermarkets nowadays food items are packaged twice with plastic and cardboard.

    Too much packaging is doing serious damage to the environment. The UK, for example, is running out of areas for burying this unnecessary waste. If such packaging is burnt, it gives off greenhouse gases which go on to cause the greenhouse effect. Recycling helps, but the process itself uses energy. The solution is not to produce such items in the first place. Food waste is a serious problem, too. Too many supermarkets encourage customers to buy more than they need. However, a few of them are coming round to the idea that this cannot continue, encouraging customers to reuse their plastic bags, for example.

    But this is not just about supermarkets. It is about all of us. We have learned to connect packaging with quality. We have learned to think that something unpackaged is of poor quality. This is especially true of food. But it also applies to a wide range of consumer products, which often have far more packaging than necessary.

   There are signs of hope. As more of us recycle, we are beginning to realise just how much unnecessary material we are collecting. We need to face the wastefulness of our consumer culture, but we have a mountain to climb.

1.What does the underlined phrase “that over-consumption” refer to?

  A. Using too much packaging.

  B. Recycling too many wastes.

  C. Making more products than necessary.

  D. Having more material than is needed.

2. The author uses figures in Paragraph 2 to show _______.

  A. the tendency of cutting household waste

B. the fact of packaging overuse

  C. the rapid growth of supermarkets

  D. the increase of packaging recycling

3.What can be inferred from Paragraph 4?

   A. Unpackaged products are of bad quality.

   B. Supermarkets care more about packaging.

   C. It is improper to judge quality by packaging.

   D. Other products are better packaged than food.

4. What can we learn from the last paragraph?

   A. Needless material is mostly recycled.

  B. Fighting wastefulness is difficult.

    C. People like collecting recyclable waste.

   D. The author is proud of their consumer culture.

 

 

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