首页 > 大学本科

网友您好，请在下方输入框内输入要搜索的题目：

请输入或粘贴题目内容搜题

搜题

拍照、语音搜题，请扫码下载APP

题目内容（请给出正确答案）

[单选题]

Compared with coal, bad effects of solar energy are relatively（), but it costs more at present to utilize it.

A.tender

B.wild

C.mild

D.evident

答案

C、mild

解析：

解析： A.tender主要指人性格温和 B. 是野生的，天然的

发布时间：2023-02-07

更多“Compared with coal, bad effects of solar energy are relatively（), but it costs more at present to ut…”相关的问题

第1题

Besides climate change, developing countries like China need to deal with energy【21】and en

vironmental issues: the development of sources of clean energy needs to be【22】line with their interests. Clean energy has been given greater prominence than ever before; it is seen as a new industrial【23】and【24】of economic growth for the new century. The time for clean energy has come.

In China, clean energy is moving ahead at full speed. Take wind power as an example: by the end of last year, China had【25】wind power generating capacity of 12. 21GW, making China the largest wind power generator in Asia and fourth in the world. But according to the research, one-third of wind power capacity is running【26】due to an inability to get the power to the national【27】.

India-like China—relies【28】on coal for its energy needs. This will only change if the funds and technology to develop clean energy, such as wind and nuclear power, are【29】. India will not choose clean energy【30】. Nuclear power is currently the most【31】of clean energy sources.【32】, if it is to be【33】on a large scale by developing nations, technological advances will be needed to make it competitive with coal.

Compared【34】developed countries, developing countries have more【35】choices when it comes to energy structure. Promoting economic growth requires【36】energy—and coal, the cheapest and most【37】source of energy for many countries—is the【38】choice. Cheap coal means cheap electricity and a competitive economy. Rising electricity prices would cause public【39】and impact on standards of【40】.

(21)

A．scarce

B．scare

C．scarcity

D．scary

点击查看答案

第2题

Beijing is to spend up to ＄20 billion to change the Chinese capital into a 21 st-century o

ne for the 2008 Olympics.

The government managed to host the 2008 Olympics. The general aim is for Beijing to have the same environmental standards as Paris, London or Washington by 2008.

Hundreds of millions of dollars will be spent piping natural gas to the city's homes and taking away dirty coal burning gradually while 60, 000 buses will be changed to liquefied gas.

The money will also be used for relocating the polluting factories and building green belts. By 2008 around 90 percent of Beijing's waste will be treated, compared to only 40 percent at present.

Olympic officials have already announced that around 50 large projects are being dealt with to improve traffic congestion and cut down pollution, They include the construction of Beijing's first light railway, a 40.5-kilometer line which is expected to be completed in 2005.

Beijing, besides, plans to build an 82.25-kilometer-long subway to add to the existing 53 kilometers. Nine major roads will be rebuilt or widened.

Beijing also plans to build a 70-meter-wide green belt among the waterways to protect the water quality as well as to increase the green areas.

The government will spend money piping natural gas to the city's homes in order to ______.

A．reduce the pollution of our capital

B．bring down the cost of daffy life

C．solve the problem of being short of fuel

D．keep up with the development of modem society

点击查看答案

第3题

Women have more problems than men in old age. First of all, they have less money—or no mon

ey at all—and because of this, they often feel they get less respect, even at home. Quite a large number have no pension (退休金) because they have never worked outside the home, and thirty-eight percent are supported mainly by their husbands or children. Second, a larger number of old women than old men become widows (single women). Men are normally older than the women they marry, and women generally live longer than men. The remarriage among older widows is lower than that among widowers (single men). Statistics (统计) from 1990 in Shanghai show only 52 percent of elderly women with husbands still living, compared to (与……相比) 82 percent of men.

Because of lower incomes and the difficulty of remarriage, many elderly women who live alone, are poor and have almost no social life. Even an old couple lives with children, it is the woman who ends up doing the work around the house. She cleans the rooms, prepares meals, and takes care of the family. Some 75 percent of them carry out such heavy physical tasks as buying and carrying grain, coal and other supplies for the home. How to improve the quality of life of women in their later years is a problem that needs to be dealt with by all the society.

If they had more money, elderly women______.

A．would have no more problems

B．could live a fairy life

C．would get more respect

D．would need no care of others

点击查看答案

第4题

CWomen have more problems than men in old age. First of all, they have less money--or no m

oney at all-- and because of this, they often feel they get less respect, even at home. Quite a large number have no pension (退休费) because they have never worked outside the home, and thirty-eight percent are supported mainly by their husbands or children. Second, a larger number of old women than old men become window (single women). Men are normally older than the women they marry, and women generally live longer than men. The remarriage among older windows is lower than that among widows (single men). Statistics (统计) from 1990 in Shanghai show only 52 percent of elderly women with husbands still living, compared to (与…相比) 82 percent of men.

Because of lower incomes and the difficulty of remarriage, many elderly women who live alone, are poor and have almost no social life. Even an old couple lives with children, it is the woman who ends up doing the work around the house. She cleans the rooms, prepares meals, and takes care of the family. Some 75 percent of them carry out such heavy physical tasks as buying and carrying grain, coal and other supplies for the home. How to improve the quality of life of women in their later years is a question that needs to be dealt with by all the society.

第44题：If they had more money, elderly women ________.

[A] would have no more problem

[B] could live a fairy life

[C] would get more respect

[D] would need no care of others

点击查看答案

第5题

Remember global warming？（记得全球变暖吗？) Back in December, the threat of climate ch

Remember global warming？ (记得全球变暖吗？) Back in December, the threat of climate change was thundering and the rich countries agreed to cut their carbon-dioxide and other green-house-related emissions. Since then, interest has cooled markedly, and many European countries are already running away from the promises they made so loudly a few months ago. But there has been much talk, and a bit of action, to encourage renewable energies such as wind, hydro, solar and all living organisms. These emit no greenhouse gases, but tend to cost more than coal, oil or gas.

The better, simpler idea is to remember that the easiest way to reduce something is to tax it - in this case, by taxing the carbon content power. The dirtier the power, the more tax it would pay. So dirty coal would be more expensive than clean coal, which would see its price rise in relation to oil, which would be more expensive compared with gas, which would lose some of its price advantage over renewables.

Unless a carbon tax was so huge as to be economically crippling, it would not remove the price differential between all renewables and fossil fuels. But it would narrow that gap, by fixing the differing environmental costs into the price - a useful principle in itself. It would also give renewable producers a strong incentive to cut costs, and fossil-fuel suppliers the motivation to clean their products.

Precedents suggest strongly that a carbon tax would be effective. But the disadvantage to carbon tax is political. After almost a decade of trying, the European Union gave up an attempt at a European carbon tax last year. Germany’s ruling coalition is fighting against a proposed energy tax. In America, politicians believe that even mentioning the notion is certain death. But many of the political objections could be met if a carbon tax were made up for the loss elsewhere, for example by lowering payroll or sales taxes. There is always suspicion when governments come up with clever new ways to tax, and rightly so. The response to that suspicion should be to win the argument, not to abandon it.

1.According to the passage, the easiest way to remove global warming is ___________.

A.to encourage people to use renewable energies

B.to cut down the cost of wind, hydro, solar and all living organisms

C.to force people to pay more tax for the carbon content of power

D.to talk less but act more

2.The standard of paying tax was _________.

A.that the more carbon content of power it contained, the higher tax one would pay

B.that oil would be more expensive than clean coal

C.that renewables would be most expensive of all

D.in the order that renewables are the most expensive while clean coal the cheapest

3.We can infer from the passage that carbon tax ___________.

A.may not be as effective as people expect

B.has encouraged renewable producers to cut costs

C.has reduced consumption of the carbon content energy successfully

D.couldn’t be that effective if fossil fuels would not be forbidden

4.The word “crippling”(Para. 3) most probably means _________.

A.greatly increasing

B.seriously weakening

C.sharply declining

D.abruptly halting

5.The reason why many countries stopped introducing carbon tax eventually was mainly that ___________.

A.governments had tried to put it into effect for many years but with no obvious result

B.if one country made up the loss by paying the carbon tax, other countries would follow it

C.governments were afraid of being suspected if they adopted the new tax

D.governments had been discussing what to do with carbon tax for a long time, but they hadn’t come to an agreement

点击查看答案

第6题

C Women have more problems than men in old age. First of all, they have less money—or no m

Women have more problems than men in old age. First of all, they have less money—or no money at all—and because of this, they often feel they get less respect, even at home. Quite a large number have no pension (退休金) because they have never worked outside the home, and thirty-eight percent are supported mainly by their husbands or children. Second, a larger number of old women than old men become widows (single women). Men are normally older than the women they marry, and women generally live longer than men. The remarriage among older widows is lower than that among widowers (single men). Statistics (统计) from 1990 in Shanghai show only 52 percent of elderly women with husbands still living, compared to (与……相比) 82 percent of men.

If they had more money, elderly women______.

A. would have no more problems

B. could live a fairy life

C. would get more respect

D. would need no care of others

点击查看答案

第7题

回答题。 Electromagnetic Energy1. White light seems to be a combination of all colors. Th

回答题。

Electromagnetic Energy

1. White light seems to be a combination of all colors. The energy that comes from a source of light is not limited to the kind of energy you can see. Heat is given off by a flame or an electric light. On a cloudy day it is possible to get a sunburn even though you feel cool. Visible light and the kind of energy that produce warmth and sunburn are examples of electromagnetic energy.

2. The sun is 93 million miles from the earth. Yet we can use energy from the sun because electromagnetic energy travels through space.

3. Many other kinds of energy are also types of electromagnetic energy. Radio, television, and radar signals travel from transmitters to receivers as low-energy electromagnetic waves. Infrared (红外线的 ) radiation is an electromagnetic wave. When it is absorbed by matter, heat is produced. Waves of infrared and visible light have more energy than waves of radio, television, or radar. Ultraviolet rays (紫外线 ) and X-rays are electromagnetic waves with even greater amounts of energy. Infrared radiation is used in cooking food and heating buildings. Sunlight and electric lights are part of our requirements for normal living. Ultraviolet radiation is useful in killing certain disease organisms. X-rays and gamma rays have so mush energy that they travel right through solid objects. They can be used to detect and treat cancer. X-rays are used in industry to find hidden cracks in metal, and in medicine to reveal broken bones.

4. Usually we use electricity to generate electromagnetic energy. The source of most of our energy is the sun. Heat from the sun causes water to evaporate. When the water falls to the earth as rain, some of it is trapped behind dams and then used to operate electric generators. Other generators are powered by coal, but the energy stored in coal came from the sun, too.

5. Until recently, the source of the tremendous amount of energy given off by the sun was a puzzle. If the sun depended on chemical reactions, it would have used up all its energy long ago. Experiments with electromagnetic radiation led to the theory that mass can be converted into energy. About forty years after the theory was proposed, nuclear energy was harnessed (利用 ) by man. Chemical energy comes from electron (电子 ) rearrangement. Nuclear energy comes from a change in the nucleus of an atom. Compared with chemical reactions, nuclear reactions release millions of times more energy per pound of fuel. We now believe that the sun&39;s energy comes from the nuclear reactions in which hydrogen is changed into helium (氦 ) .

6. Nuclear energy is beginning to compete with coal as an economical source of power to generate electricity. It is also being used to operate engines in large ships. Scientists continue to seek new and better methods of obtaining and using energy.

Paragraph 3__________ 查看材料

A.Nuclear reactions as the lasting source of the sun"s energy

B.The most important source of energy

C.Types of electromagnetic energy

D.The machines used for energy generation

E.Seeking new sources of energy

F.The use of ultraviolet radiation in medicine

点击查看答案

第8题

根据下列文章,请回答 23～30 题。 Electromagnetic Energy 1 White light seems to be a com

根据下列文章,请回答 23～30 题。

Electromagnetic Energy

1 White light seems to be a combination of all colors. The energy that comes from a source of light is not limited to the kind of energy you can see. Heat is given off by a flame or an electric light. On a cloudy day it is possible to get a sunburn even though you feel cool. Visible light and the kinds of energy that produce warmth and sunburn are examples of electromagnetic energy.

2 The sun is 93 million miles from the earth. Yet we can use energy from the sun because electromagnetic energy travels through space.

3 Many other kinds of energy are also types of electromagnetic energy. Radio, television, and radar signals travel from transmitters to receivers as low-energy electromagnetic waves. Infrared (红外线的) radiation is an electromagnetic wave. When it is absorbed by matter, heat is produced. Waves of infrared and visible light have more energy than waves of radio, television, or radar. Ultraviolet rays (紫外线) and X-rays are electromagnetic waves with even greater amounts of energy. Infrared radiation is used in cooking food and heating buildings. Sunlight and electric lights are part of our requirements for normal living. Ultraviolet radiation is useful in killing certain disease organisms. X-rays and gamma rays have so much energy that they travel right through solid objects. They can be used to detect and treat cancer. X-rays are used in industry to find hidden cracks in metal, and in medicine to reveal broken bones.

4 Usually we use electricity to generate electromagnetic energy. The source of most of our energy is the sun. Heat from the sun causes water to evaporate. When the water falls to the earth as rain, some of it is trapped behind dams and then used to Operate electric generators. Other generators are powered by coal, but the energy stored in coal came from the sun, too.

5 Until recently, the source of the tremendous amount of energy given off by the sun was a puzzle. If the sun depended on chemical reactions, it would have used up all its energy long ago. Experiments with electromagnetic radiation led to the theory that mass can be converted into energy. About forty years after the theory was proposed, nuclear energy was harnessed (利用) by man. Chemical energy comes from electron (电子) rearrangement. Nuclear energy comes from a change in the nucleus of an atom. Compared with chemical reactions, nuclear reactions release millions of times more energy per pound of fuel. We now believe that the sun's energy comes from the nuclear reactions in which hydrogen is changed into helium (氦).

6 Nuclear energy is beginning to compete with coal as an economical source of power to generate electricity. It is also being used to operate engines in large ships. Scientists continue to seek new and better methods of obtaining and using energy.

第 23 题 Paragraph 3__________

A．Nuclear Reactions as the Lasting Source of the Sun's Energy

B．The Most Important Source of Energy

C．Types of Electromagnetic Energy

D．The Machines Used for Energy Generation

E．Seeking New Sources of Energy

F．The Use of Ultraviolet Radiation in Medicine

点击查看答案

第9题

Electromagnetic Energy？？ 1. White light seems to be acombination of all colors. The energy

Electromagnetic Energy

？？ 1. White light seems to be acombination of all colors. The energy that comes from a source of light is notlimited to the kind of energy you can see. Heat is given off by a flame or anelectric light. On a cloudy day it is possible to get a sunburn even though youfeel cool. Visible light and the kinds of energy that produce warmth andsunburn are examples of electromagnetic energy.

？？ 2. The sun is 93 millionmiles from the&39;earth. Yet we can use energy from the sun because electro-magnetic energy travels through space.

？？ 3. Many other kinds ofenergy are also types of electromagnetic energy. Radio, television, and ra- darsignals travel from transmitters to receivers as low-energy electromagneticwaves. Infrared (红外线的) radiation is an electromagnetic wave. When it is absorbed by matter,heat is produced. Waves of infrared and visible light have more energy thanwaves of radio, television, or radar. Ultraviolet rays（红外线） ahd X-rays areelectromagnetic waves with even greater amounts of energy. Infrared radia- tionis used in cooking fo？？od？？ and heating buildings. Sunlight and electric lights arepart of our require- ments for normal living. Ultraviolet radiation is usefulin killing certain disease organisms. X-rays and gamma rays have so much energythat they travel right through solid objects. They can be used to de- tect andtreat cancer. X-rays are used in industry to find hidden cracks in metal, andin medicine to re-veal broken bones.

？？ 4. Usually we useelectricity to generate electromagnetic energy. The source of most of our energyis the sum Heat from the sun causes water to evaporate. When the water falls tothe earth as rain, some of it is trapped behind dams and then used to operateelectric generators. Other generators are powered？？ by coal, but the energystored in coal came from the sun, too.

？？ 5. Until recently, thesource of the tremendous amount of energy given off by the sun was a puz- zle.If the sun depended on chemical reactions, it would have used up all its energylong ago. Experi- ments with electromagnetic radiation led to the theory thatmass can be converted into energy. About forty years after the theory wasproposed, nuclear energy was harnessed (利用) by man. Chemical en- ergy comes from electron (电子) rearrangement. Nuclear ene？？rgy comes from a change in the nucleus of anatom. Compared with chemical reactions, nuclear reactions release millions oftimes more energy per pound of fueL Wenow believe that the sun&39;s energy comes from the nuclear reactions in which hy-drogen is changed into helium (氦）.

？？ 6. Nuclear energy isbeginning to compete with coal as an economical source of power to generate, electricity.It is also being used to operate engines in large ships. Scientists continue toseek new and better methods of obtaining and using energy.？？

Paragraph 3_______？？

？？Paragraph 4____？？

？？Paragraph5___？？

？？Paragraph 6_________？？

？？Visible light that produce warmth is an example of_____？？

？？We can use energy from the sun because________？？

？？The energy stored in coal_______.？？

？？___________when electron rearrangement takes place？？

请帮忙给出每个问题的正确答案和分析，谢谢！

点击查看答案

第10题

Electromagnetic EnergyWhite light seems to be a combination of all colors. The energy that

Electromagnetic Energy

White light seems to be a combination of all colors. The energy that comes from a source of light is not limited to the kind of energy you can see. Heat is given off by a flame or an electric light. On a cloudy day it is possible to get a sunburn even though you feel cool. Visible light and the kind of energy that produce warmth and sunburn are examples of electromagnetic energy.

The sun is 93 million miles from the earth. Yet we can use energy from the sun because electromagnetic energy travels through space.

Many other kinds of energy are also types of electromagnetic energy. Radio, television, and radar

signals travel from transmitters to receivers as low-energy electromagnetic waves. Infrared (红外线的) radiation is an electromagnetic wave. When it is absorbed by matter, heat is produced. Waves of infrared and visible light have more energy than waves of radio, television, or radar. Ultraviolet rays (紫外线) and X-rays are electromagnetic waves with even greater amounts of energy. Infrared radiation is used in cooking food and heating buildings. Sunlight and electric lights are part of our requirements for normal living. Ultraviolet radiation is useful in killing certain disease organisms. X-rays and gamma rays have so mush energy that they travel right through solid objects. They can be used to detect and treat cancer. X-rays are used in industry to find hidden cracks in metal, and in medicine to reveal broken bones. Usually we use electricity to generate electromagnetic energy. The source of most of our energy is the sun. Heat from the sun causes water to evaporate. When the water falls to the earth as rain, some of it is trapped behind dams and then used to operate electric generators. Other generators are powered by coal, but the energy stored in coal came from the sun, too.

Until recently, the source of the tremendous amount of energy given off by the sun was a puzzle. If the sun depended on chemical reactions, it would have used up all its energy long ago. Experiments with electromagnetic radiation led to the theory that mass can be converted into energy. About forty years after the theory was proposed, nuclear energy was harnessed (利用) by man. Chemical energy comes from electron (电子) rearrangement. Nuclear energy comes from a Change in the nucleus of an atom. Compared with chemical reactions, nuclear reactions release millions of times more energy per pound of fuel. We now believe that the sun&39;s energy comes from the nuclear reactions in which hydrogen is changed into helium (氦).

Nuclear energy is beginning to compete with coal as an economical source of power to generate electricity. It is also being used to operate engines in large ships. Scientists continue to seek new and better methods of obtaining and using energy.

Paragraph 3 ______.

A. Nuclear reactions as the lasting source of the sun&39;s energy.B. The most important source of energy.C. Types of electromagnetic energy.D. The machines used for energy generation.E. Seeking new sources of energy. F. The use of ultraviolet radiation in medicine.

Paragraph 4 ______.

Paragraph 5 ______.

Paragraph 6 ______.

One can get a sunburn even ______.

A. when it is absorbed by matterB. when it is cloudyC. because they can pass through solid objectsD. when the sunrays are fierceE. when a change in the nucleus of an atom takes place F. when electron rearrangement takes place

Infrared radiation can produce heat ______.

X-rays and gamma rays can be used to detect and treat cancer ______.

Chemical energy is generated ______.

请帮忙给出每个问题的正确答案和分析，谢谢！

点击查看答案

第11题

The energy stored in coal ______.

点击查看答案