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It takes more energy to do a job in two minutes than__________ the same job in two hours．
A.to do
B.do
C.will do
D.is doing
答案
更多“It takes more energy to do a job in two minutes than__________ the same job in two hours．A”相关的问题
第1题
answer for each statement from the four choices marked A, B，C and D.
“It hurts me more than you”, and “This is for your own good.” These are the statements my mother used to make years ago when I had to learn Latin, clean my room, stay home and do homework.
That was before we entered the permissive period in education in which we decided it was all right not to push our children to achieve their best in school. The schools and the educators made it easy on us. They taught that it was all right to be parents who take a let-alone policy. We stopped making our children do homework. We gave them calculators, turned on the television, left the teaching to the teachers and went on vacation.
Now teachers, faced with children who have been developing at their own pace for the past 15 years, are realizing we’ve made a terrible mistake. One such teacher is Sharon·Klompus who says of her students—“so passive”—and wonders what happened. Nothing was demanded of them, she believes. Television, says Klompus, contributes to children’s passivity. “We’re not training kids to work any more,” says Klompus. “We’re talking about a generation of kids who’ve never been hurt or hungry. They have learned somebody will always do it for them. Instead of saying ‘go look it up’, you tell them the answer. It takes greater energy to say no to a kid.”
Yes, it does. It takes energy and it takes work. It’s time for parents to end their vacation and come back to work. It’s time to take the car away, to turn the TV off, to tell them it hurts you more than them but it’s for their own good. It’s time to start telling them no again.
1.Children are becoming more inactive in study because__________.
A.they watch TV too often
B.they have done too much homework
C.they have to fulfil too many duties
D.teachers are too strict with them
2.According to historic books, women in the Song Dynasty used paper cut as headdress.()
A.Right
B.Wrong
C.Doesn’t say
第2题
According to the writer, the main problem to our environment today is______.
A．the increase of population
B．the limited energy resources
C．the more serious air pollution
D．the development of technology
第3题
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
请帮忙给出每个问题的正确答案和分析，谢谢！
第4题
A．only a very small part is available
B．the sun is too distant from the earth
C．it takes thousands of years for this energy to be stored up in coal and oil
D．our scientific knowledge is not sufficient
第5题
Most people learn best using a variety of _________, but traditional classes are an ideal(理想的)start for many people. They _______ an environment where you can practice under the ________ of someone who’s good at the language. We all lead ________ lives and learning a language takes _______. You will have more success if you study regularly, so try to develop a ________. It doesn’t matter if you haven’t got long. Becoming fluent in a language will take years, but learning to get by takes ________.
Many people start learning a language and soon give up. “I’m too _______,” they say. Yes, children do learn languages more _______ than adults, but research has shown that you can learn a language at any ________. And learning is good for the health of your brain, too. I’ve also heard people ________ about the mistakes they make when ________. Well, relax and laugh about your mistakes ________ you’re much less likely to make them again.
Learning a new language is never ________. But with some work and devotion, you’ll make progress. And you’ll be _________ by the positive reaction of some people when you say just a few words in ________ own language. Good luck!
1.A. technical B. political C. practical D. physical
2.A. After B. So C. Though D. Or
3.A. literature B. transport C. agriculture D. medicine
4.A. view B. knowledge C. form. D. database
5.A. paintings B. regulations C. methods D. computers
6.A. protect B. change C. respect D. provide
7.A. control B. command C. guidance D. pressure
8.A. busy B. happy C. simple D. normal
9.A. courage B. time C. energy D. place
10.A. theory B. business C. routine D. project
11.A. some risks B. a lot less C. some notes D. a lot more
12.A. old B. nervous C. weak D. tired
13.A. closely B. quickly C. privately D. quietly
14.A. age B. speed C. distance D. school
15.A. worry B. hesitate C. think D. quarrel
16.A. singing B. working C. bargaining D. learning
17.A. if B. and C. but D. before
18.A. tiresome B. hard C. interesting D. easy
19.A. blamed B. amazed C. interrupted D. informed
20.A. their B. his C. our D. your
第6题
No wooded landscape we see today has been forest for all time. Plants have minimum requirements of temperature and moisture and, in ages past, virtually every part of Earth's surface has at some time been either too dry or too cold for plants to survive. However, as soon as climatic conditions change in favor of plant life, a fascinating sequence of changes occurs, called a primary succession.
First to colonize the barren land are the lowly lichens, surviving on bare rock. Slowly, the acids produced by these organisms crack the rock surface, plant debris accumulates, and mosses establish a shallow root-hold. Ferns may follow and, with short grasses and shrubs, gradually form. a covering of plant life. Roots probe even deeper into the developing soil and eventually large shrubs give way to the first trees. These grow rapidly, cutting off sunlight from the smaller plants, and soon establish complete domination-closing their ranks and forming a climax community which may endure for thousands of years.
Yet even this community is not everlasting. Fire may destroy it outright and settlers may cut it down to gain land for pasture or cultivation. If the land is then abandoned, a secondary succession will take over, developing much faster on the more hospitable soil. Shrubs and trees are among the early invaders, their seeds carried by the wind, by birds and lodged in the coats of mammals.
For as long as it stands and thrives, the forest is a vast machine, storing energy and many elements essential for life.
What does the forest strike mankind as permanent？
A．The trees are in community.
B．The forest is renewed each season.
C．Man's life is short in comparison.
D．It is an essential part our lives.
第7题
A.They provide more energy
B.They help improve the skin
C.They help build healthy teeth
D.They are good for eyesight
第8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
第9题
第10题
No wooded landscape we see today has been forest for all time. Plants have minimum requirements of temperature and moisture and, in ages past, virtually every part of Earth's surface has at some time been either too dry or too cold for plants to survive. However, as soon as climatic conditions change in favour of plant life, a fascinating sequence of changes occurs, called a primary succession.
First to colonize the barren land are the lowly lichens, surviving on bare rock. Slowly, the acids preduced by these organisms crack the rock surface, plant debris accumulates, and mosses establish a shallow root-hold. Ferns may follow and, with short grasses and shrubs, gradually form. a covering of plant life. Roots probe even deeper into the developing soil and eventually large shrubs give way to the first trees. These grow rapidly, cutting off sunlight from the smaller plants, and soon establish complete domination-closing their ranks and forming a climax community which may endure for thousands of years.
Yet even this community is not everlasting. Fire may destroy it outright and settlers may cut it down to gain land for pasture or cultivation. If the land is then abandoned, a secondary succession will take over, developing nmch faster on the more hospitable soil. Shrubs and trees are among the early invaders, their seeds carried by the wind, by birds and lodged in the coats of mammals.
For as long as it stands and thrives, the forest is a vast machine, storing energy and many elements essential for life.
What does the forest strike mankind as permanent？
A．The trees are in community.
B．The forest is renewed each season.
C．Man's life is short in comparison.
D．It is an essential part our lives.
