题目内容
（请给出正确答案）
A.①, ②；
B.②, ④；
C.①, ②, ③, ④.
D.--
参考答案
简答题官方参考答案
（由简答题聘请的专业题库老师提供的解答）
网友提供的答案
更多“Fossil fuel contains ① coal; ② Petroleum; ③ Natural gas; ④ Combustible ice.”相关的问题
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
Some growth stems from a commitment by governments and farsighted businesses to fund cleaner energy sources. But increasingly the story is about the plummeting prices of renewables, especially wind and solar. The cost of solar panels has dropped by 80 percent and the cost of wind turbines by close to one-third in the past eight years.
In many parts of the world renewable energy is already a principal energy source. In Scotland, for example, wind turbines provide enough electricity to power 95 percent of homes. While the rest of the world takes the lead, notably China and Europe, the United States is also seeing a remarkable shift. In March, for the first time, wind and solar power accounted for more than 10 percent of the power generated in the US, reported the US Energy Information Administration.
President Trump has underlined fossil fuels – especially coal – as the path to economic growth. In a recent speech in Iowa, he dismissed wind power as an unreliable energy source. But that message did not play well with many in Iowa, where wind turbines dot the fields and provide 36 percent of the state’s electricity generation – and where tech giants like Microsoft are being attracted by the availability of clean energy to power their data centers.
The question "what happens when the wind doesn’t blow or the sun doesn’t shine？" has provided a quick put-down for skeptics. But a boost in the storage capacity of batteries is making their ability to keep power flowing around the clock more likely.
The advance is driven in part by vehicle manufacturers, who are placing big bets on battery-powered electric vehicles. Although electric cars are still a rarity on roads now, this massive investment could change the picture rapidly in coming years.
While there’s a long way to go, the trend lines for renewables are spiking. The pace of change in energy sources appears to be speeding up – perhaps just in time to have a meaningful effect in slowing climate change. What Washington does – or doesn’t do – to promote alternative energy may mean less and less at a time of a global shift in thought.
26、The word "plummeting" (Line 3, Para 2) is closest in meaning to_____.
A.stabilizing
B.changing
C.falling
D.rising
According to Paragraph 3,the use of renewable energy in America______.A.is progressing notably
B.is as extensive as in Europe
C.faces many challenges
D.has proved to be impractical
It can be learned that in Iowa,_____.A.wind is a widely used energy source
B.wind energy has replaced fossil fuels
C.tech giants are investing in clean energy
D.there is a shortage of clean energy supply
Which of the following is true about clean energy according to Paragraphs 5&6？A.Its application has boosted battery storage
B.It is commonly used in car manufacturing
C.Its continuous supply is becoming a reality
D.Its sustainable exploitation will remain difficult
It can be inferred from the last paragraph that renewable energy_____.A.will bring the US closer to other countries
B.will accelerate global environmental change
C.is not really encouraged by the US government
D.is not competitive with regard to its cost
When We Are Asleep
Everyone dreams, but some people never recall their dreams, or do so very rarely. Other people always wake up with vivid recollections (记忆 ) of their dreams, though they forget them very quickly. In an average night of eight hours&39;sleep, an average adult will dream for around one hundred minutes, probably having three to five dreams, each lasting from ten to thirty minutes.
Scientists can detect when someone is having a dream by using an instrument which measures the electrical waves in the brain. During dreaming, these waves move more quickly. Breathing and pulse rate also increase, and there are rapid eye movements under the lids, just as though the dreamer were really looking at moving objects. These signs of dreaming have been detected in all mammals (哺乳动物) studied, including dogs, monkeys, cats, and elephants, and also some birds and reptiles (爬行动物) .This period of sleep is called the "D" state for around 50% of their sleep; the period reduces to around 25% by the age of 10.
Dreams take the form. of stories, but they may be strange and with incidents not connected, which make little sense. Dreams are seldom without people in them and they are usually about people we know. One estimate says that two-thirds of the "cast" of our dream dramas are friends and relations. Vision seems an essential part of dreams, except for people blind from birth. Sound and touch senses are also often aroused, but smell and taste are not frequently involved. In "normal" dreams, the dreamer may be taking part, or be only an observer. But he or she cannot control what happens in the dream.
However, the dreamer does have control over one type of dream. This type of dream is called a "lucid"(清醒的) dream. Not everyone is a lucid dreamer. Some people are occasional lucid dreamers. Others can dream lucidly more or less all the time. In a lucid dream, the dreamer knows that he is dreaming.
Some people dream but cannot remember their dreams. 查看材料
A.Right
B.Wrong
C.Not mentioned
A、Coal
B、Oil
C、Hydroelectric power
D、Natural gas
A、Convert potential energy into electric energy;
B、Convert electric energy into potential energy；
C、Convert water energy into electric energy.
D、--
警告：系统检测到您的账号存在安全风险
为了保护您的账号安全，请在“简答题”公众号进行验证，点击“官网服务”-“账号验证”后输入验证码“”完成验证，验证成功后方可继续查看答案！
