As people slowly learn to cure diseases, control floods, prevent hunger, and stop wars, fewer people die every year. As a result, the population of the world is becoming larger. In 1925 there were about 2 billion people in the world; today there are over 6 billion.
  When the number rises, extra mouths must be fed. New lands must be brought under development, or land already farmed must be made to produce more crops. In some areas the land is so over-developed that it will be difficult to make it provide more crops. In some areas the population is so large that the land is divided into too tiny units to make improvement possible with farming methods. If a large part of this farming population went into industrial work, the land might be farmed much more productively (多產(chǎn)地) with modern methods.
  There is now a race for science, technology, and industry to keep the output of food rising faster than the number of people to be fed. New types of crops, which will grow well in bad weather, are being developed, so there are now farms beyond the Arctic Circle in Siberia and North America. Irrigation (灌溉) and dry-farming methods bring poor lands under the plough. Dams hold back the waters of great rivers, which can provide water for the fields in all seasons and provide electric power for new industries. Industrial chemistry provides fertilizer to suit different soils. Every year, some new methods are made to increase or to protect the food of the world.
1. The author says that the world population is increasing because _____.
  A. there are many rich valleys and large fields
  B. farmers are producing more crops than before
  C. people are living longer due to better living conditions
  D. new lands are being made into farmlands
2. The author says that in areas with large populations, land might be more productively farmed if _____.
  A. the land was divided into smaller pieces
  B. people moved into the countryside
  C. industrial methods were used in farming
  D. the units of land were much larger
3. We are told that there are now farms beyond the Arctic Circle. This has been made possible by _____.
  A. growing new types of crops
  B. irrigation and dry-farming means
  C. providing fertilizers 
  D. destroying pests and diseases
4. Why is the land divided into tiny units in some areas?
  A. There are too many people living there.
  B. It saves more natural resources there. 
  C. It prevents crops from serious diseases there.
  D. Farmers can grow various kinds of crops there.
5. Why do some people use dams to hold back waters from great rivers?
  A. To develop a new kind of dry-farming methods.       
  B. To prevent crops from floods.
  C. To provide water and electricity in all seasons.          
  D. To water poor lands in bad weather.

 

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相關(guān)習(xí)題

科目:高中英語 來源: 題型:054

完形填空:

  One of the first such clocks was built for a king of France and placed in a tower of the royal palace, The clock did not 1 minutes or seconds.

  Usually it did not even show the correct hour! Since there was no planes or trains to catch, people were not 2 knowing the exact time.

  Gradually, clocks began to be popular, but they did not keep correct time. They were 3 a cart with a horse and driver. One of the wheels was the face of the clock. Watches 4 as soon as clocks were made small enough to be carried. These did not always tell the correct time, either. They were often put into beautiful watchcases, which were made 5 anything the owner wanted.

  The pendulum (鐘擺) clock was invented in 1657. This was the beginning of the style of clocks we call “ grandfather clocks “, which were enclosed in tall wooden boxes. Pendulum clocks showed the hours more exactly than earlier clocks, since the wright on the pendulum could be moved 6 to make the clock go faster or lower. About forty years later, minute and second hands were put on some clocks. Grandfather clocks are very much in demand again today. They are usually very expensive, however, and require 7 than other styles of clocks.

  As people began to travel more and do more things, they were more interested in knowing the correct time, By 1900, almost every house had a clock, and nearly every well-dressed gentleman 8 on a chain tucked in his vest pocket.

  Today, of course, we have electric clocks that keep giving the right time until they are unplugged or the electricity goes off. Scientists have invented clocks that look like large machines all tell the correct time to a split second.

  The most modern electric clocks for home use do not have faces or hands. These clocks are called digital clocks(數(shù)字顯示式電子鐘), and they tell the time with 9 which appear in a little window.

  Many electric locks are combined with radios, which can sometimes be set to turn on automatically(自動). Thus, 10 an alarm ringing in your ear in the morning, you can hear soft music playing when it is time to get up. Some clocks will even start the coffee maker!

1. A. count    B. ring out

   C. show    D. show off

[  ]

2. A. care for       B. concerned about

  C. suggested about    D. anxious to

[  ]

3. A. drawn by    B. of the same size as

   C. pulled by   D. in the shape of

[  ]

4. A. had been used      B. came into use

   C. became a reality   D. didn’t appear

[  ]

5. A. to look like   B. to look as

   C. very valuable    D. as small as possible

[  ]

6. A. up or down      B. right or left

   C. here and there    D. this way or that

[  ]

7. A. many room      B. much room

   C. more space     D. less money

[  ]

8. A. carried a clock    B. wearing a watch

   C. bought a watch   D. bought a watch

[  ]

9. A. a series of letters

   B. a set of numerals

   C. minute hands

   D. second hands

[  ]

10. A. take the place of

    B. in spite of

    C. without 

    D. instead of

[  ]

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科目:高中英語 來源:讀想用 高二英語(上) 題型:050

閱讀理解

  As people continue to grow and age, our body systems(系統(tǒng))continue to change.At a certain point in your life your body system will begin to weaken.Your strength may become weaker.It may become more difficult for you to see and hear.The slow change of aging causes our bodies to lose some of their ability to bounce back from disease and injury.In order to live longer, we have always tried to slow or stop this change that leads us toward the end of our lives.

  Many factors(因素)decide your health.A good diet plays an important role.The amount and type of exercise you get is another factor.Your living condition is yet another.But scientists studying aging problem want to know:Why do people grow old?They hope that by studying the aging medical science they may be able to make the length of life longer.

  There is nothing to be afraid of as old age comes.Many consider the later part of life to be the best time for living.Physical activity may become less, but often you get better understanding of yourself and the world.

  What we consider old age now may only be middle-aged some day soon.Who knows, with so many advances in medical science happening so quickly, life length may one day be measured in centuries, rather than in years!

(1)

When people become aging, they will lose some of their ability to bounce back from dis ease and injury, “bounce back”here means ________.

[  ]

A.

to escape from disease and injury

B.

to improve one's health after one's disease and injury

C.

to jump backward

D.

to run fast

(2)

In order to live longer ________.

[  ]

A.

we have to try to improve our food

B.

we should try to do more exercise

C.

we should slow down the change of aging

D.

we should keep in high spirits

(3)

Many consider the later part of life to be the best time of living because ________.

[  ]

A.

they consider their life has been a successful one

B.

they have come through the battle of life safely

C.

they have less misunderstanding of themselves and the outside world

D.

they have nothing to do all day long only to watch their grandchildren growing up around them

(4)

It may be inferred from the passage that our life length may become ________.

[  ]

A.

longer

B.

shorter

C.

no change

D.

the passage didn't mention

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科目:高中英語 來源:101網(wǎng)校同步練習(xí) 高三英語 外語教學(xué)與研究出版社 題型:054

完形填空

  Certainly dustmen prefer to be known as “Reuse Collection and Disposal Officers”(垃圾回收處理官員).You may think that this is rather   1  , and it is better to call a spade a spade.But dustmen can be as   2   as people of any other occupation(職業(yè)),though we must   3   that their job is not a   4   one in the world.We often take dustmen for granted.Perhaps because they usually come very early in the morning, before most people are   5  .We are likely to forget their   6  .Our dustbins are   7   regularly, but we   8   stop to think about the men who do this.However, it is one of the most important jobs in the world, and when there are no dustmen to   9   the rubbish, the general   10   soon becomes aware that something is wrong.

  Recently, the dustmen of England went on strike for higher wages.During the first few days it was regarded as a   11  .But when the first two weeks had passed, and the dustbins were overflowing in nearly every backyard in the country, the joke did not seem so   12   any more.  13   the strike continued, people could not   14   the hills of rubbish around their dustbins, and they looked for other places in which to   15   it.Even Leicester Square, in the heart of West End of London, was   16   high with plastic bags full of smelly rubbish.This was a(n)  17   attraction that the people of London were not at all   18   to see.Even when the strike was over, it took several weeks for the country to get cleaned up completely.Perhaps now the English people   19   the work of their dustmen rather more   20   and won’t take them for granted any more.

(1)

[  ]

A.

clever

B.

silly

C.

interesting

D.

reasonable

(2)

[  ]

A.

sensitive

B.

careless

C.

hopeful

D.

shy

(3)

[  ]

A.

realize

B.

believe

C.

know

D.

admit

(4)

[  ]

A.

necessary

B.

difficult

C.

romantic

D.

heavy

(5)

[  ]

A.

away

B.

up

C.

down

D.

in

(6)

[  ]

A.

existence

B.

presence

C.

absence

D.

performance

(7)

[  ]

A.

cleaned

B.

filled

C.

emptied

D.

burned

(8)

[  ]

A.

generally

B.

frequently

C.

sometimes

D.

seldom

(9)

[  ]

A.

take away

B.

take off

C.

take up

D.

take on

(10)

[  ]

A.

society

B.

citizen

C.

public

D.

community

(11)

[  ]

A.

trick

B.

joke

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trouble

D.

show

(12)

[  ]

A.

pleasing

B.

excited

C.

stupid

D.

funny

(13)

[  ]

A.

When

B.

While

C.

As

D.

Because

(14)

[  ]

A.

bear

B.

contain

C.

manage

D.

control

(15)

[  ]

A.

keep off

B.

give up

C.

take care of

D.

get rid of

(16)

[  ]

A.

crowded

B.

piled

C.

fixed

D.

put

(17)

[  ]

A.

business

B.

industrial

C.

tourist

D.

agricultural

(18)

[  ]

A.

disappointed

B.

serious

C.

nervous

D.

happy

(19)

[  ]

A.

like

B.

recognize

C.

find

D.

appreciate

(20)

[  ]

A.

highly

B.

eagerly

C.

differently

D.

entirely

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科目:高中英語 來源:河北省唐山一中2011屆高三9月調(diào)研考試英語試題 題型:050

閱讀理解

  Domestic(馴養(yǎng)的)horses now pull ploughs, race in the Kentucky Derby, and carry police.But early horses weren't tame(馴服的)enough to perform these kinds of tasks.Scientists think the first interactions humans had with horses were far different from those today.

  Thousands of years ago, people killed the wild horses that lived around them for food.Over time, people began to catch the animals and raise them.This was the first step in domestication.

  As people began to tame and ride horses, they chose to keep those animals that had more desirable characteristics.For example, people may have chosen to keep horses that had a gentle personality so they could be ridden more easily.People who used horses to pull heavy loads would have chosen to keep stronger animals.Characteristics like strength are partly controlled by the animals' genes.So as the domesticated horses reproduced, they passed the characteristics on to their young.Each new generation of horses would show more of these chosen characteristics.

  Modern-day horse breeds(種類)come in a wide variety of shapes and sizes.This variety didn't exist in the horse population before domestication.The Shetland horse is one of the smallest breeds-typically reaching only one meter tall.With short, strong legs, the animals were bred to pull coal out of mine shafts(礦井)with low ceilings.Huge horses like the Clydesdale came on the scene around 1700.People bred these heavy, tall horses to pull large vehicles used for carrying heavy loads.

  The domestication of horses has had great effects on societies.For example, horses were important tools in the advancement of modern agriculture.Using them to pull ploughs and carry heavy loads allowed people to farm more efficiently.Before they were able to ride horses, humans had to cross land on foot.Riding horses allowed people to travel far greater distance in much less time.That encouraged populations living in different areas to interact with one another.The new form of rapid transportation helped cultures spread around the world.

(1)

Before domestication horses were ________.

[  ]

A.

caught for sports

B.

hunted for food

C.

made to pull ploughs

D.

used to carry people

(2)

The author uses the Shetland horse as an example to show ________.

[  ]

A.

it is smaller than the Clydesdale horse

B.

horses used to have gentle personalities

C.

some horses have better shapes than others

D.

horses were of less variety before domestication

(3)

Horses contributed to the spread of culture by ________.

[  ]

A.

carrying heavy loads

B.

changing farming methods

C.

serving as a means of transport

D.

advancing agriculture in different areas

(4)

The passage is mainly about ________.

[  ]

A.

why humans domesticated horses

B.

how humans and horses needed each other

C.

why horses came in different shapes and sizes

D.

how human societies and horses influenced each other

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科目:高中英語 來源: 題型:閱讀理解

Typing your password or credit card number into a computer is a moment’s work. But if you think your personal details disappear as soon as you hit the Return key, think again: they can sit on the computer’s hard disk for years waiting for a hacker to rip them off.

  As people spend more time on the web and hackers become more sophisticated, the dangers of storing personal information on computers are growing by the day, security experts say. There are some safeguards, such as never allowing your computer to store your passwords. But even that is no guarantee of security.

  When you type in a password, it is stored in random access memory (RAM), where it is held temporarily until other data overwrites it or the computer is switched off.

  But every so often, the computer copies the contents of its RAM onto hard disk, where it is easy prey for a hacker, who can read it directly or design a worm to e-mail it back. The longer sensitive data stays in RAM, the more likely it is to be copied onto the disk, where it stays until it is overwritten—which might not happen for years.

  Tal Garfinkel and colleagues from Stanford University have created a software tool which simulates the workings of a complete computer system. Within the simulation, sensitive data can be tagged and then tracked as it passes through the system. Next, Garfinkel and his team simulated computers running common software that regularly handles passwords or confidential personal information, such as Internet Explorer, the Windows login script and Apache server software.

  In a paper to be presented, they conclude that the programs took virtually no measures to limit the length of time the information is retained. Some of the tested software even copied the sensitive information, apparently without restraint.

  This is the first time anyone has tried to measure the extent of this problem, says Rebecca Wright, a security expert at Stevens Institute of Technology. Garfinkel hopes the results will arouse software developers to take action.

1.Which of the following statements is true according to the passage?

  A.It is secure to use your password as long as you hit the Return key.

  B.Your personal details is likely to be in danger if you spend more time on the web.

  C.Your password will be safe if you have some safeguards.

  D.Never allowing your computer to store your passwords will be safe.

2.Which of the following is NOT the reason for the unsafety of a password?

  A.It will be stored in RAM.

  B.It will be copied onto hard disk.

  C.It might not be overwritten.

  D.It will disappear as soon as you hit the return key.

3.Tal Garfinkel and his team measured the extent of security of    .

  A.simulating the working of a complete computer system

  B.tagging sensitive data

  C.passing through the system

  D.running common software

4.What can be inferred from the passage?

  A.The length of the time the information is stored is not limited.

  B.The programs can not retain the information.

  C.The security problem should be paid more attention to.

  D.Some sensitive information has been copied.

 

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