B

Energy-saving Finns invented the first ice skate more than 5,000 years ago, as a practical method of transport to make getting across frozen lakes less of a struggle.

The earliest skates would have been blades made from bones and are one of the oldest means of transport ever discovered —they may even have been essential survival tools.

Researchers at Manchester Metropolitan University have calculated that ice skates would have saved energy by 10 percent, and suggest that they were developed for practical use and were not used for recreation, as they are today.

They think the most likely birthplace of skating is southern Finland, where there are many icy lakes.

The scientists have put their theory to the test and made replica（復(fù)制品） skates modeled after examples held at the British Museum and the Fitzwilliam Museum in Cambridge.

Volunteers on ice rinks in the Alps had their heart rates, oxygen intake and skating speeds measured while they skated with the replica skates. From this experiment, re-searchers were able to calculate energy consumption and the efficiency of their skating. They discovered that skating over the land in ancient Fin-land would have saved 10 percent of people’s energy. The result is based on the fact that Finland has the highest concentration of lakes in the world. The ancient Finnish people could benefit more than others from developing this tool for transport.

In a time and environment in which the balance between energy taken from food and energy required to live was crucial; the least cost of energy might have helped humans survive in extreme conditions.

45. The first ice skate invented by the Finns was used for _____.

      A. recreation                            B. transportation across lakes 

    C. saving energy                        D. sports

46. The birthplace of skating might be southern Finland because _____.

      A. there are many icy lakes there  

    B. people need more oxygen to breathe in there

      C. people feel tired easily there   

    D. transportation there is more difficult

47. Scientists have experimented with replica skates and found that with those skates the ancient

Finnish people would have _____.

     A. crossed a lot of lakes

     B. saved 10 percent of energy when crossing the lakes

     C. climbed the Alps easily 

     D. otherwise wasted a lot of food and energy

48. It can be inferred from the story that _____.

     A. the Finnish people were clever enough to invent the practical skates

     B. there were a lot of lakes in ancient Finland

     C. the living conditions were very hard for the ancient Finnish people

     D. it was very cold in ancient times in Finland

練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：高中英語(yǔ) 來(lái)源： 題型：

There is a lot of love in today’s world and I’m convinced that this is still the most powerful ______ in the world.

  A. power          B. energy         C. force             D. strength

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源： 題型：閱讀理解

The weight-loss world is full of assertions①, rarely proved, that some pill can help you “burn calories while you sleep.” But a recent Dutch study reports that it can be done – simply by eating more lean protein②.

Researchers report for the first time that consuming nearly a third of daily calories as lean protein – for example, lean meats without the skin – speeds up a person’s metabolism③ during sleep and that higher protein intake increases the burning of calories and fat during the day. Plus, when the study’s participants, who were all women of healthy weight, ate more protein, they felt fuller, more satisfied and less hungry than when they consumed a diet with the amount of protein, about 10 percent of calories.

The findings suggest that adding lean protein to your daily food “enables you to reach the same level of satiety④ that you are used to with about 80 percent of your normal energy intake,” notes Margriet Westerterp-Plantenga. “That means you can eat about 20 percent less and still have the same satiety.”

What gives protein its caloric edge? It’s more difficult for the body to metabolize protein than either fat or carbohydrates⑤. The body also doesn’t store protein as efficiently as it does carbohydrates or fat. So protein is more likely to be burned and that in turn requires more oxygen and helps you feel satisfied in the hours after eating.

But the latest findings don’t mean it’s time to dust off those high-protein diet books. The current study limited fat to about 30 percent of daily calories, and included 40 percent of calories as healthy carbohydrates, including fruit and vegetables. For example, lunch included bread, soy milk, fruit yogurt, tuna in water, tomatoes, cucumbers, feta cheese and salad dressing.

1. According the first paragraph, we know that ______.

  A. there’re few studies on weight-loss in the world

B. many studies on weight-loss only cheat customers

C. only few studies are useful for weight-loss

D. there’re few studies about lean protein

2. According to the passage, lean protein can help burn calories while you sleep because ______.

  A. it can slow down a person’s metabolism       B. it’s difficult for the body to metabolize

  C. it will not make you feel full                D. it’s easy to be stored in the body

3. The underlined phrase “dust off” in the last paragraph means ______.

   A. get rid of      B. put away      C. get ready to rewrite      D. get ready to reuse

4. The passage is mainly to tell readers ______.

  A. there is a good diet for weight-losers

B. you can burn your calories in your sleep

  C. high-protein diet books will be popular

D. choosing right food is of great use

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源： 題型：閱讀理解

After the U.S. House of Representatives passed a bill aimed at retaliatory(報(bào)復(fù)的) action against China for its “significantly undervalued” currency, Treasury Secretary Timothy Geithner urged the IMF to pressure China to adopt “more flexible, more market-directed exchange-rate management”. This is a coded message to China: You’re keeping on purpose your currency cheap, and the U.S. economy is paying the price. So cut it out --- or else. The normally dull IMF meeting became the latest battleground for the U.S. to be against a fast developing China.

    Our new conventional wisdom is that China’s policy leads to make trade deficits (逆差) greater and the loss of American jobs. Dozens of candidates have run ads attacking a competitor for allowing China to take advantage of us. In the election-year view, China grew 10% annually for the past decade while maintaining low inflation(通漲) only by taking advantage of its artificially low currency. The idea that the U.S. is not responsible for its own economy is a black-is-white view. It argues that China and its currency are causing the lion’s share of harm.

This is an argument born of fear. It covers a fact that the economies of China and the U.S. have become beneficial to each other. Those trillions in reserves that China accumulates: Where do they go? Back to the U.S. in the form of lending money to the federal government. Those made-in-China goods that account for the trade deficit: Whom do they benefit? China, yes, but also American consumers and companies. Without China, American companies could not have maintained their profitability in recent years. Take two brand names, Caterpillar and Nike. Both have their products made in China, but both also view China as a fast-growing market for their products.

George Soros warned recently that a currency war could put the world into disorder more damaging than anything caused by the financial crisis of the 1930s. He’s right. Whether we like it or not, we live in a global system. The zero-sum attitude toward China and its currency is a relic, the remaining of an earlier time when nations defined economic life.

China is far from perfect and seeks its own advantage, but holding it accountable for our domestic problems is beyond outdated. It reflects a dangerous refusal to deal with the world as it is. Retaliating against China over currency will not regain high-end jobs in the U.S., which needs more our own demand. It will not renew construction or retool the American labor force. It will not rebuild rotting bridges or create a next-generation energy network.

Which of the following argument can be supported by the writer?

A. China is the winner in the Sino-US trade.

B. China’s rapid development over the past ten years is based on its low inflation.

C. The world’s economy will benefit from China’s policy changes on its currency.

D. The US will get hurt if it tries hard on damaging China’s economy.

This passage is in a tone that is ____________.

A. in favor of China

B. in the shoes of US

C. blaming China’s low currency policy

D. helping IMF solve the world’s economic problem

The writer makes his point of view clear through the passage by using _____________.

A. reasonable analysis

B. leaders’ quotations

C. figure examples

D. moving stories

China’s currency policy ________.

A. will help increase the demand in the US

B. is unable to equip the American labor force with new working skills

C. could guide the world economy for the next decade

D. is to be controlled by the international currency groups

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：鹽城市20092010學(xué)年度高三年級(jí)第二次調(diào)研考試 題型：閱讀理解

A Low-Carbon Economy (LCE) or Low-Fossil-Fuel Economy (LFFE) is an economy which has a smallest output of greenhouse gas (GHG) release into the atmosphere, but specifically refers to the greenhouse gas CO2. Recently, most of scientific and public opinion has come to the conclusion that there is such an accumulation of GHG (especially CO2) in the atmosphere due to human-related activities that the climate is changing. The over-concentration of these gases is producing global warming that affects long-term climate, with negative impacts on humanity in the foreseeable future. Globally performed LCEs therefore, are proposed as a means to avoid catastrophic climate change, and as a forerunner to the more advanced, zero-carbon society and renewable-energy economy.
Some nations are low-carbon societies which are not heavily industrialized or populated. In order to avoid climate change at any point in the future, all nations considered carbon-thick societies and societies which are heavily populated, should become zero-carbon societies and economies. Several of these countries have promised to become ‘low carbon’ but not entirely zero carbon, and claim that release will be cut by 100% by offsetting release rather than stopping all release. In other words, some release will continue which will be offset, so they are not low-release.
Nations seek to become low-carbon economies as part of a national global warming reduction strategy. A comprehensive strategy to manage global warming is carbon neutrality, geoengineering and adaptation to global warming.
Nuclear power, or, the proposed strategies of carbon collection and storage (CCS) have been proposed as the primary means to achieve a LCE while continuing to exploit non-renewable resources; there is concern, however, with the matter of spent-nuclear-fuel storage, security and the uncertainty of costs and time needed to successfully carry out CCS worldwide and with guarantees that the stored release will not leak into the atmosphere. Alternatively, many have proposed renewable energy should be the main basis of a LCE, but, they have their associated problems of high-cost and inefficiency; this is changing, however, since investment and production have been growing significantly in recent times. Furthermore, regardless of the effect to the atmosphere by GHG releases, the growing issue of peak oil may also be reason enough for a change to a LCE.
63. Low-carbon economy is encouraged for the following reasons except that ______.
A. too much greenhouse gas CO2 is released
B. the over-concentration of greenhouse gases is producing global warming
C. it can avoid catastrophic climate change
D. low carbon and zero carbon nations and societies claim for it
64. The underlined word in the first paragraph probably means ______.
A. warning                             B. pioneer                           C. symbol                            D. guide
65. According to the passage, which of the following is NOT true?
A. Nuclear power could act as one of the primary means to achieve a LCE.
B. There’s worry about spent-nuclear-fuel storage, security and the uncertainty of costs.
C. The stored release will be likely to leak into the atmosphere.
D. Renewable energy tends to become the only means to achieve a LCE.
66. From the last paragraph, we can infer that the writer’s attitude toward the proposal of adapting renewable energy is ______.
A. negative                            B. positive                           C. self-confident                D. doubtful

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：2013-2014學(xué)年安徽省六校教育研究會(huì)高三2月聯(lián)考英語(yǔ)試卷（解析版） 題型：完型填空

There was once a group of young people searching everywhere for happiness but what they got was only annoyance, grief and misery.

So they       Socrates for advice on where happiness      . But       giving any answers, Socrates asked them to help with building a       first. The group of guys had to       the task, laying aside their own business of seeking happiness. It took them a long time to cut down a tall tree, gouging out (挖空) the center. Through painstaking effort, they made a canoe out of the tree. They launched the canoe into a river, and then       together in it, singing with      .

Socrates asked, “My children, do you have happiness now?” They answered in chorus: “We       be happier!” Socrates      , “That’s it!       you are too busy pursuing something to notice anything bitter, happiness will occur.”

From the story I got to know that happiness      hides behind every tiny thing that you are involved in, and that you may only get pleasure through       work and creativity.

We may have to       pain in our daily life and in the process of       happiness. Sometimes we tend to look for happiness in       things, like a new car, clothes, etc. True long term happiness, however, comes from within our       and spirit. So why not turn suffering into       life, and       tears into the light in your heart? Only in this way can we make it through and find true happiness.

So my dear friends, just remember happiness is a state of mind and a matter of      , and I       you all a life of happiness.

1.A. pointed to           B. referred to             C. turned to                D. kept to

2.A. lay                                  B. belonged                C. stood                       D. laid

3.A. apart from          B. instead of               C. other than              D. for fear of

4.A. house                            B. boat                         C. bridge                     D. school

5.A. set about             B. set down                 C. set out                     D. set up

6.A. sat                                  B. stood                       C. got                           D. rowed

7.A. joy                            B. sorrow                      C. curiosity                  D. hope

8.A. mustn’t                         B. shouldn’t                C. couldn’t                  D. needn’t

9.A. declared            B. thought            C. added                      D. assumed

10.A. Unless                         B. Whenever              C. Until                         D. However

11.A. never                          B. always                     C. ever                         D. seldom

12.A. cautious            B. endless          C. hard                         D. effective

13.A. experience                B. avoid                       C. enjoy                       D. deny

14.A. searching                   B. seeking          C. hoping                     D. improving

15.A. spiritual             B. nice                         C. new                         D. material

16.A. body                           B. part                          C. soul                          D. head

17.A. blaming             B. praising                   C. ending                     D. cursing

18.A. turn                   B. put                           C. divide                      D. draw

19.A. time                            B. energy                    C. fact                          D. choice

20.A. wish                            B. promise                  C. bring                        D. require

 

查看答案和解析>>

同步練習(xí)冊(cè)答案