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阅读材料，回答题： Energy CycleDo you find getting up in the morning so difficult that it&

阅读材料，回答题：

Energy Cycle

Do you find getting up in the morning so difficult that it&39;s painful？ This might be called lazi-ness, but Dr. Kleitman has anew explanation. He has proved that everyone has adaily energycycle.

During the hours when you labor through your work you may say that you&39;re "hot". That&39;strue. The time of day when you feel most energeticis when your cycle of body temperature is at itspeak. For some people the peak comes during the morning. For others it comes in the afternoon orevening. No one has discovered why this is so, but it leads to such familiar monologues as : "Getup, John! You&39;ll be late for work again!" The possiB．le explanation to the trouB．le is that John isat his temperature-and-energy peak in the evening. Much family quarrelling ends when husbandsand wives realize what these energy cycles mean, and which cycle each member of the family has.

You can&39;t change your energy cycle, B．ut you can learn to make your life fit to it better. HaB．itcan help, Dr. Kleitman B．elieves. MayB．e you&39;re sleepy in the evening but you must stay up lateanyway. Counteract your cycle to some extent by haB．itually staying up later than you want to. Ifyour energy is low in the morning but you have an important job to do early in the day, risebeforeyour usual hour. This won&39;t change your cycle, but you&39;ll get up steam and work better at yourlow point.

Get off to aslow start which saves your energy. Get up with aleisurely yawn and stretch. Siton the edge of the bed aminute before putting your feet on the floor. Avoid the trouble of search-ing for clean clothes by laying them out the night before. Whenever possible, do routine work inthe afternoon and save tasks requiring more energy or concentration for your sharper hours.

If aperson finds getting up early aproblem， most probably__________. 查看材料

A.he is alazy person

B.he refuses to follow his own cycle

C.he is not sure when his energy is low

D.he is at his peak in the afternoon or evening

答案

查看答案

发布时间：2021-09-25

更多“阅读材料，回答题： Energy CycleDo you find getting up in the morning so difficult that it&”相关的问题

第1题

阅读材料，回答题： Renewable Energy SourcesToday petroleum（石油) provides around 40% of t

阅读材料，回答题：

Renewable Energy Sources

Today petroleum(石油) provides around 40% of the world&39;s energy needs, mostly fuellingautomobiles. Coal is still used, mostly in power stations, to cover one-quarter of our energy needs,but it is the least efficient, unhealthiest and most environmentally damaging fossil fuel(矿物燃料). Natural gas reserves could fill some of the gap from oil, but reserves of that will not last into the 22nd century either. Most experts predict we will exhaust easily accessible reserves within 50 years. Less-polluting renewable energy sources offer A．more practical long-term energy solution. "Renewable" refers to the fact that these resources are not used faster than they can be replaced.

Hydroelectric(水力发电的)power is now the most common form. of renewable energy, sup-plying around 20% of world electricity. China&39;s Three Gorges Dam is the largest ever. At five timesthe size of the U. S. &39;s Hoover Dam, its 26 turB．ines(涡轮机) will generate the equivalent energyof 18 coal-fired power stations. It will satisfy 3% of China&39;s entire electricity demand.

In 2003, the first commercial power station to use tidal (潮汐的) currents in the open seaopened in Norway. It is designed like windmill(风车), but others take the form. of turB．ines.

As prices fall, wind power has become the fastest growing type of electricity generation--quadrupling(翻两番) worldwide between 1999 and 2005. Modern wind farms consist of turbinesthat generate electricity. Though it will be more expensive, there is more than enough wind to pro-vide the world&39;s entire energy needs. Wind farms come in onshore and offshore forms. They can of-ten end up at spots of natural beauty, and are often unpopular with residents. And turbines are nottotally harmless--they can interfere with radar, alter climate and kill seabirds. Scotland is build-ing Europe&39;s largest wind farm, which will power 200,000 homes. The U. K. &39;s goal is to generateone-fifth of power from renewable sources, mainly wind, by 2020. but this may cause problems,because wind is unreliable.

According to the passage， which of the following is the most polluting energy resource？查看材料

A.Petroleum

B.Coal

C.Natural gas

D.Water

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第2题

阅读材料，回答题。 NanotechnologyMany of the grand challenges of today and the future are

阅读材料，回答题。

Nanotechnology

Many of the grand challenges of today and the future are found in the question: "How are we going to solve the problems and make serious improvements in industrial manufacturing, disease control, environmental pollution control, global climate change, food production, transportation, communication, and others？"

Nanotechnology (纳米技术 ) promises to make revolutionary contributions.Within the next few years we can expect to see major improvements. Here are some possibilities the things to come.Nanotechnology is fundamentally changing the way materials and devices will be produced in the future.

Nanostructures, ceramics, polymers, metals, and other materials will have greatly improved mechanical properties.In fact, with the ability to build things atom-by-atom and molecule-by-molecule there will be new classes of structural materials.Nanotechnology will enable products to be lighter, stronger, smarter, cheaper,cleaner, and more precise.

The ability to synthesize nanoscale budding blocks with precisely controlled size and composition and then to assemble them into larger structures with unique properties and functions will revolutionize segments of the materials manufacturing industry. Nanotechnology is expected to bring about lighter, stronger, and programmable materials ; reductions in life-cycle costs through lower failure rates; innovative devices based on new principles and architectures ; and use of molecular cluster manufacturing.

Nanotechnology will provide new tools for medicine.It could radically change the way surgery is done.It will make it possible to do molecular scale surgery to repair and rearrange cells.Since disease is the result of physical disorder, misarranged molecules and cells, medicine at this level should be able to cure most diseases.

Mutations in DNA could be repaired and cancer cells, toxic chemicals, and viruses could be destroyed through use of medical Nan devices.

Nanotechnology enabled increases in computational power will permit the characterization of macromolecular networks in realistic environments.Such simulations will be essential elements in the development of biocompatible implants and in the drug discovery process. Nanotechnology has the potential to significantly impact energy efficiency, storage, and production, Nanotechnology can change the economics of energy production.

The passage deals mainly with__________. 查看材料

A.grand challenge in manufacturing， medicine and computer industry

B.possibilities of nanotechnology"s contributions in the future

C.great changes caused by nanotechnology

D.practical application of nanotechnology

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第3题

阅读材料，回答题： Adaptation of Living ThingsCertain animals and plants develop character

阅读材料，回答题：

Adaptation of Living Things

Certain animals and plants develop characteristics that help them cope with their environmentbetter than others of their kind. This natural biological process is called adaptation. Among thesuperior characteristics developed through adaptation are those that may help in getting food orshelter, in providing protection, and in producing and protecting the young. That results in the

evolution of more and more organisms（生物体）that are better fitted to their environments.

Each living thing is adapted to its way of life in a general way, but each is adapted especiallyto its own distinct class. A plant, for example, depends upon its roots to fix itself firmly and toabsorb water and inorganic chemicals(无机物). It depends upon its green leaves for using thesun&39;s energy to make food from inorganic chemicals. These are general adaptations, common tomost plants. In addition, there are special adaptations that only certain kinds of plants have.

Many animals have adaptations that help them escape from their enemies. Some are hiddenby their body color or shape, and many look like a leaf or a little branch. The coats of deer arecolored to mix with the surroundings. Many animals have the ability to remain completely stillwhen an enemy is near.

Organisms have a great variety of ways of adapting. They may adapt in their structure, func-tion, and genetics; in their development and production of the young; and in other respects. Anorganism may create its own environment, as do warm-blooded mammals (哺乳动物), whichhave the ability to adjust body heat exactly to maintain their ideal temperature despite changingweather. Usually adaptations are an advantage, but sometimes an organism is so well adapted to a particular environment that if conditions change, it finds it difficult or impossible to readapt to thenew conditions.

Some plants and animals develop superior characteristics so that they may 查看材料

A.help others of their kind get food， shelter and other things needed

B.survive even in extremely severe conditions

C.become better adapted to the environments than others of their kind

D.result in the evolution and production of more intelligent organisms

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第4题

回答题。 The Process of Gaining or Losing WeightThe process of gaining or losing weight c

回答题。

The Process of Gaining or Losing Weight

The process of gaining or losing weight can be explained by comparing your body to your car. Both run 51 fuel, food for your body and gasoline for your car. Both 52 that fuel, first into heat, then energy, some of 53 is used to do work, and some emitted as waste. And 54 .your car uses more energy when the engine is racing than when it is idling, 55 does your body use more energy when you are working hard than 56 you are resting.

For the purpose of this comparison, 57 , there is one significant difference between them. Your car cannot store fuel by turning it into 58 else ; all gasoline not 59 remains as gasoline. But your body stores 60 energy as fat. When the gas tank is 61 empty, the car won&39;t run ; but your body can burn fat to provide more energy.

Therefore, if you want to gain weight, you must do 62 of two things : eat more calories (units of heat, therefore energy ) , or use less through 63 . If you want to lose weight, you do the 64 , decrease your intake of calories or increase the amount of energy you spend. There is 65 way. Gaining or losing weight is always a relation between intake and output of potential energy.

材料题请点击右侧查看材料问题查看材料

A.in

B.on

C.for

D.against

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第5题

根据材料，回答题。Renewable Energy SourcesToday petroleum provides around 40% of the world"

根据材料，回答题。

Renewable Energy Sources

Today petroleum provides around 40% of the world"s energy needs， mostly fuelling automo- biles. Coal is still used， mostly in power stations， to cover one-quarter of our energy needs， but it isthe least efficient， unhealthiest and most environmentally damaging fossil fuel. Natural gas reservescould plug some of the gap from oil， but reserves of that will not last into the 22nd century either.

Most experts predict we will exhaust easily accessible reserves within 50 years. We could fastreach an energy crisis. We need to rapidly develop sustainable solutions to fuel our future. Less-polluting renewable energy sources offer a more practical long-term energy solution. They may ben-efit the world"s poor too. "Renewable" refers to the fact that these resources are not used fasterthan they can be replaced.

The Chinese and Romans used watermills over 2，000 years ago. But the first hydroelectricdam was built in England in 1870. Hydroelectric power is now the most common form. of renewableenergy， supplying around 20% of world electricity. China"s Three Gorges Dam， which has just beencompleted，is the largest ever. At five times the size of the US"s Hoover Dam， its 26 turbines willgenerate the equivalent energy of 18 coal-fired power stations. It will satisfy 3% of China"s entireelectricity demand. Surprisingly，some argue that hydroelectric dams significantly contribute green-house gases.

In 2003， the first commercial power station to harness tidal currents in the open sea opened inNorway. It is designed like windmill， but others take the form. of turbines.

As prices fall， wind power has become the fastest growing type of electricity generation——quadrupling worldwide between 1999 and 2005. Modern wind farms consist of turbines that gener-ate electricity. Though it will be more expensive， there is more than enough wind to provide theworld"s entire energy needs. Wind farms come in onshore and offshore forms. They can often endup at spots of natural beauty， and are often unpopular with residents. And turbines are not totallybenign——they caninterfere with radar and leave a significant ecological footprint， altering climateand killing sea birds. Migrating birds may have more luck avoiding them. Scotland is building Europe"s largest wind farm， which will power 200，000 homes. The UK"s goal is to generate one-fifth of power from renewable sources， mainly wind， by 2020. But this may cause problems， be-cause wind is unreliable.

What are the energy resources that are renewable according to the article？查看材料

A. Petroleum and coal.

B. Natural gas.

C. Wind and water.

D. A and B.

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第6题

根据材料，回答题。 Thirst for OilWorldwide every day， we devour the energy equivalent of abo

根据材料，回答题。

Thirst for Oil

Worldwide every day， we devour the energy equivalent of about 200 million barrels of oil.Most of the energy on Earth comes from the Sun. In fact enough energy from the Sun hits the planet"s surface each minute to cover our needs for an entire year， we just need to find an efficient way，to use it. So far the energy in oil has been cheaper and easier to get at. But as supplies dwindle， this will change， and we will need to cure our addiction to oil.

Burning wood satisfied most energy needs until the steam-driven industrial revolution， when energy-dense coal became the fuel of choice. Coal is still used， mostly in power stations， to cover one quarter of our energy needs， but its use has been declining since we started pumping up oil. Coal is the least efficient， unhealthiest and most environmentally damaging fossil fuel， but could make a comeback， as supplies are still plentiful: its reserves are five times larger than oil"s.

Today petroleum， a mineral oil obtained from below the surface of the Earth and used to pro: duce petrol， diesel oil and various other chemical substances， provides around 40% of the world"s energy needs， mostly fuelling automobiles. The US consumes a quarter of all oil， and generates a similar proportion of greenhouse gas emissions.

The majority of oil comes from the Middle East， which has half of known reserves. But other significant sources include Russia， North-America， Norway， Venezuela and the North Sea. Alaska"s Arctic National Wildlife Refuge could be a major new US source， to reduce reliance on foreign imports.

Most experts predict we will exhaust easily accessible reserves within 50 years， though opinions and estimates vary. We could fast reach an energy crisis in the next few decades， when demand exceeds supply. As conventional reserves become more difficult to access， others such as oil shales and tar sands may be used instead. Petrol could also be obtained from coal.

Since we started using fossil fuels， we have released 400 billion tonnes of carbon， and burning the entire reserves could eventually raise world temperatures by 13℃. Among other horrors，this would result in the destruction of all rainforests and the melting of all Arctic ice.

"... we will need to cure our addiction to oil. " Why does the author say so？查看材料

A.Most of the energy on Earth comes from the Sun.

B.Oil supply is increasing all the time.

C.Demand for oil is increasing all the time.

D.Oil，supply is decreasing.

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第7题

根据下面内容，回答题：Earth is the only 21 we know of in the universe that can support huma

根据下面内容，回答题：

Earth is the only 21 we know of in the universe that can support human life.22 human activities are making the planet less fit to live on. As the western world 23 on consuming two-thirds of the world" s resources while half of the world" s population do so 24 to stay alive we are rapidly destroying the 25 resource we have by which all people can survive and prosper.

Everywhere fertile soil is 26 built on or washed into the sea. Renewable resources are exploited so much that they will never be able to recover 27 We discharge pollutants 28 the atmosphere without any thought of the consequences. As a 29 the planet" s ability to support people is being 30 at the very time when rising human numbers and consumption are 31 increasingly heavy demands on it. The Earth" s 32 resources are there for us to use. We need food， water， air， energy， medicines， warmth， shelter and minerals to 33 us fed， comfortable， healthy and active. If we are sensible in how we use the resources they will 34 indefinitely. But if we use them wastefully and excessively they will soon run 35 and everyone will suffer.

材料题请点击右侧查看材料问题查看材料

A.situation

B.place

C.position

D.site

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第8题

根据以下材料，回答题An Essential Scientific ProcessAll life on the earth depends upon green

根据以下材料，回答题

An Essential Scientific Process

All life on the earth depends upon green plants. Using sunlight， the plants produce their own food. Then animals feed upon the plants. They take in the nutrients the plants have made and stored.

But that"s not all. Sunlight also helps a plant produce oxygen. Some of the oxygen is used by the plant， but a plant usually produces more oxygen than it uses. The excess oxygen is necessary for animals and other organisms to live.

The process of changing light into food and oxygen is called photosynthesis. Besides light energy from the sun， plants also use water and carbon dioxide. The water gets to the plant through its roots. The carbon dioxide enters the leaves through tiny openings called stomata. The carbon dioxide travels to chloroplasts （叶绿题）， special cells in the bodies of green plants. This is where photosynthesis （光合作用） takes place. Chloroplasts contain the chlorophylls （叶绿素） that give plants their green color. The chlorophylls are the molecules that trap light energy. The trapped light energy changes water and carbon dioxide to produce oxygen and a simple sugar called glucose.

Carbon dioxide and oxygen move into and out of the stomata. Water vapor also moves out of the stomata. More than 90 percent of water a plant takes in through its roots escapes through the stomata. During the daytime， the stomata of most plants are open. This allows carbon dioxide to enter the leaves for photosynthesis. As night falls， carbon dioxide is not needed. The stomata of most plants close. Water loss stops.

If photosynthesis ceased， there would be little food or other organic matter on the earth. Most organisms would disappear. The earth"s atmosphere would no longer contain oxygen. Photosynthesis is essential for life on our planet.

In the first paragraph， the word "excess" means___________ . 查看材料

A.heavy

B.extra

C.green

D.liquid

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第9题

请根据短文的内容，回答题。 Save Energy at HomeOn the average, Americans waste as much energy

请根据短文的内容，回答题。

Save Energy at Home

On the average, Americans waste as much energy as two-thirds of the world&39;s population consumes. That&39;s largely the __________ .(51) of driving inefficient cars, using inefficient appliances (设备), and living and working in poorly insulated (隔热)buildings. Then what can you do to __________ (52) the situation？＜br＞

Buy energy-efficient products--buy new appliances or electronics of the highest energy-efficiency rating. New energy-efficient models may cost more initially, but have a lower operating __________ (53)over their lifetimes. The most energy-efficient models __________ (54) the Energy Star label, which identifies products __________ (55) use 20-40 percent less energy than standard new products.＜br＞

According to the EPA (美国环境保护署), the typical American household can save about $400 per year in __________ (56) bills with products that carry the Energy Star.＜br＞

Switch to compact fluorescent bulbs (荧光灯) --change the three bulbs you use __________ .(57)in your house to compact fluorescents. Each compact fluorescent bulb will keep half a ton of CO2 out of the air __________ (58) its lifetime. __________ .(59), compact fluorescent bulbs last ten times as long and can save $30 per year in electricity costs.＜br＞

Set heating and cooling temperatures correctly--check thermostats (温度自动调节器) in your home to make sure they are __________ (60) at a level that doesn&39;t waste energy. Turn off lights and other electrical appliances such as televisions and radios when you&39;re not __________ .(61) them. Install automatic timers for lights that people in your house frequently __________(62) to turn them off when leaving a room. Let the sun shine in--the cheapest and most energy-efficient light and heat source is often fight outside your window. On __________ (63) days, open blinds (百叶窗) to let the sun light your home for free. Also remember that .(64) entering a room equals passive solar heating.＜br＞

Even on cold winter days, sun streaming into a room can raise the temperature by several __________ (56).

__________ 查看材料

A.power

B.result

C.way

D.work

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第10题

根据以下材料，回答题Better Solar Energy Systems: More Heat， More LightSolar photovoltaic th

根据以下材料，回答题

Better Solar Energy Systems: More Heat， More Light

Solar photovoltaic thermal energy systems， or PVTs， generate both heat and electricity， but__________ （51） now they haven"t been very good at the heat-generating part compared to a stand-alone solar thermal collector. That"s because they operate at low temperatures to cool crystalline silicon solar cells，__________ （52） lets the silicon generate more electricity but isn"t a very efficient way to gather heat.

That"s a problem of economics. Good solar hot-water systems can harvest much more energy than a solar-electric system at a substantially lower__________（53）. And it"s also a space problem: photovoltaic cells can__________ （54） up all the space on the roof， leaving little room for thermal applications.

In a pair of studies， Joshua Pearce， an associate professor of materials science and engineering，has devised a__________ （55） in the form. of a better PVT made with a different kind of silicon.

His research collaborators are Kunal Girotra from Thin Silicon in California and Michael Pathak and Stephen Harrison from Queen"s University， Canada.

Most solar panels are made with crystalline silicon， but you can also make solar cells out of amorphous silicon， commonly known__________ （56） thin-film silicon. They don"t create as much electricity， but they are lighter， flexible， and cheaper. And， because they__________ （57） much less silicon， they have a greener footprint. __________ （58）， thin-film silicon solar cells are vulnerable to some bad-news physics in the form. of the Staebler-Wronski effect.

"That means that their efficiency drops when you __________（59） them to light——pretty much the worst possible effect for a solar cell，" Pearce explains， which is one of the__________ （60） thin-film solar panels make up only a small fraction of the market.

However， Pearce and his team found a __________（61） to engineer around the Staebler-Wronski effect by incorporating thin-film silicon in a new __________（62） of PVT. You don"t have to cool down thin-film silicon to make it work. In fact， Pearce"s group discovered that by heating it to solar-thermal operating temperatures， near the boiling__________ （63） of water， they could make thicker cells that largely __________（64） the Staebler-Wronski effect. When they applied the thin-film silicon directly to a solar thermal energy collector， they also found that by baking the cell once a day， they__________ （65） the solar cell"s electrical efficiency by over 10 percent.

回答（51）题查看材料

A.until

B.unless

C.when

D.if

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