The surprising experiment I am about to describe proves that air is all around y

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The surprising experiment I am about to describe proves that air is all around you and that it proves down upon you．Air pressure is a wonderful force．When you swim underwater, you can feel water push down your body．The air all around you does the same．However, your body is so used to it that you do not notice this．The pressure is caused by a layer of air called the atmosphere．This layer surrounds the Earth, extending to about five kilometers above the Earth"s surface．
The following experiment is an easy one that you can do at home．But make sure that you are supervised, because you will need to use matches．
What you need
·A hard-boiled egg without the shell
·A bottle with a neck slightly smaller than the egg
·A piece of paper
·A match
Method
1）Check that the paper will sit firmly on the neck of the bottle．
2）Tear the paper into strips and put the strips into the bottle．
3）Light the paper by dropping a burning match into the bottle．
4）Quickly sit the egg on the neck of the bottle．
Result
Astonishingly, the egg will be sucked into the bottle．Your friends will be amazed when you show them the experiment．But be careful when you handle matches．
Why it happened
As the paper burns, it needs oxygen and uses up the oxygen （air）in the bottle．The egg acts as a seal in the neck of the bottle, so no more air can get inside．This reduces the air pressure inside the bottle．The air pressure must equalize, so more air from outside must enter the bottle．The outside air presses against the egg and then the egg is pushed into the bottle! That proves that air is all around and that it is pressing down on it．
小题1:Why is there the need to take care when you are doing the experiment?

A．The bottle could break．

B．You need to light the paper with a match．

C．The egg needs to be shelled．

D．The egg has to be perfectly placed on the neck of the bottle．

小题2:In the experiment, the burning inside the bottle can__．

A．equalize the air pressure inside and outside

B．make a seal in the neck of the bottle

C．finish up the oxygen inside the bottle

D．produce more oxygen inside th

e bottle

小题3:How did the egg put into the bottle?

A．The oxygen inside the bottle sucked the egg in．

B．It became salt without the shell．

C．The neck of the bottle was wide enough．

D．The outside air pressure forced it into the bottle．

小题4:The experiment is carried out to prove ____．

A．water pushes on your body when you swim underwater

B．the earth is surrounded by a layer of air called the atmosphere

C．the pressure of air around us has a powerful force

D．the air pressure is not equalized around us

答案

小题1:B
小题2:C
小题3:D
小题4:C

解析

小题1:细节理解题。从Result下面的But be careful when you handle matches可以作出判断。
小题2:细节理解题，从Why it happened下面的As the paper burns, it needs oxygen and uses up the oxygen （air）in the bottle可以判断瓶子内部的氧气被消耗殆尽。
小题3:细节理解题。从Why it happened下面的The outside air presses against the egg and then the egg is pushed into the bottle!可以作出判断。
小题4:主旨大意题，文章第一句话The surprising experiment I am about to describe proves that air is all around you and that it proves down upon you．开门见山，提出了写作的目的。

举一反三

As computers become all the more popular in China, Chinese people are increasingly relying on computer keyboards to input Chinese characters. But if they use the computer too much, they may end up forgetting the exact strokes（笔画）of each Chinese character when writing on paper. Experts suggest people, especially students, write by hand more.
Do you write by hand more or type more? In Beijing, students start using a computer as early as primary school. And computer dependence is more wide-spread among university students. Almost all their assignments and essays are typed on a computer.
All the students interviewed say they usually use a computer.
It"s faster and easier to correct if using a computer. And that"s why computers are being applied more and more often to modern education. But when people are taking stock in computers increasingly, problems appear.
"When I"m writing with a pen, I find I often can"t remember how to write a character, though I feel I’m familiar with it."
"I"m not in the mood to write when faced with a pen and paper."
Many students don"t feel this is something to worry about. Now that it"s more convenient and efficient to write on a computer, why bother to handwrite?
Many educators think differently. Shi Liwei , the headmaster of a famous primary school in the capital said "Chinese characters enjoy both practical and aesthetic(审美的) value. But those characters typed with computer keyboards only maintain their practical value. All the artistic beauty of the characters is lost. And handwriting contains the writer"s emotion. Through one"s handwriting, people can get to know one"s thinking and personality. Beautiful writing will give people a better first impression of them"
To encourage students to handwrite more, many primary schools in Beijing have made writing classes compulsory(必修的)and in universities, some professors are asking students to turn in their homework and essays written by hand.
小题1:Which of the following can best serve as the title of the passage?

A．The Importance of Handwriting and Typing.

B．To Type or To Hand Write

C．Writing By Computer Will Replace Writing By Hand

D．Practical and Aesthetic Value of Chinese Characters.

小题2:The students interviewed prefer to write using a computer mainly because______.

A．they are usually asked to e-mail their Homework and Essays

B．they can correct the mistakes they make quickly and conveniently

C．they find it not easy to remember how to write a character

D．computers have become a trend and fashion in China.

小题3:Which of the following statements is NOT TRUE of the advantages of handwriting?

A．Handwriting contains the writer"s emotion.

B．The writer’s thinking and personality are shown in his or her handwriting,

C．Handwriting can impress people well and build one’s self-confidence

D．Chinese characters enjoy both practical and aesthetic value.

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We have spoken of marriage as a formal contract.It should be noted, however, that this contract does not 1 the same form in different societies.In Western societies, the 2 of a man and a woman 3 given the status of legal marriage by being registered by an official 4 by the state.In some African so cieties, 5 , marriage has nothing to do 6 an official registration of this kind but is legalized by the formal 7 of goods.Generally 8 is the bridegroom who is required to make a 9 of goods to the bride"s kin(亲戚), though sometimes a payment is 10 made by the bridegroom"s kin to that of the bride.
Among the Nuer, a 11 living in Southern Sudan, the payment made to the bride"s kin, 12 as bridewealth, is in the 13 of cattle.Once the 14 of bridewealth is agreed 15 , and the formal payment is made, the marriage becomes a 16 union and the offspring of the union become the acceptable 17 of the husband.They remain 18 children even 19 the wife subsequently leaves him to live with 20 man。
1.A.make B.get C.take D.do
2.A.condition B.difference C.union D.divorce
3.A.is B.are C.was D.were
4.A.recognizing B.recognize C.to recognize D.recognized
5.A.however B.yet C.though D.still
6.A.with B.from C.for D.to
7.A.exchange B.contact C.communication D.connection
8.A.that B.this C.one D.it
9.A.money B.payment C.cost D.consumption
10.A.also B.too C.either D.as well
11.A.a person B.a people C.a man D.a couple
12.A.called B.known C.named D.looked
13.A.shape B.size C.form D.type
14.A.amount B.number C.figure D.volume
15.A.upon B.with C.to D.for
16.A.legal B.casual C.direct D.progressive
17.A.bride B.cattle C.wealth D.children
18.A.his B.her C.their D.ones
19.A.before B.because C.while D.if
20.A.other B.another C.more D.farther

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Today the car is the most popular sort of transportation in all of the United States.It has completely 1 the horse as a 2 of everyday transportation.Americans use their car for 3 90% of all 4 business.Most Americans are able to 5 cars.The average price of a 6 made car was ,050 in 1950, ,470 in 1960 and up to ,750 7 1975.During this period American car manufacturers set about 8 their products and work efficiency.As aresult, the yearly income of the 9 family increased from 1950 to 1975 10 than the price of cars.For this reason 11 a new car takes a smaller 12 of a familys total earnings today.In 1951 13 it took 8.1 months of an average familys 14 to buy a new car.In 1962 a new car 15 8.3 of a familys annual earnings, by 1975 it only took 4.75 16 income.In addition, the 1975 cars were technically 17 to models from previous years.The 18 of automobile extends throughout the economy 19 the car is so important to American.Americans spend more money 20 keeping their cars running than on any other item.
1.A.denied B.reproduced C.replaced D.ridiculed
2.A.means B.mean C.types D.kinds
3.A.hardly B.nearly C.certainly D.somehow
4.A.personal B.personnel C.manual D.artificial
5.A.buy B.sell C.race D.see
6.A.quickly B.regularly C.rapidly D.recently
7.A.on B.in C.before D.after
8.A.raising B.making C.reducing D.improving
9.A.unusual B.smallest C.average D.biggest
10.A.slower B.equal C.faster D.less
11.A.bringing B.obtain C.bought D.purchasing
12.A.part B.half C.number D.quality
13.A.clearly B.proportionally C.percentage D.suddenly
14.A.income B.work C.plans D.debts
15.A.used B.spent C.cost D.needed
16.A.months B.years C.family D.year
17.A.famous B.superior C.fastest D.better
18.A.running B.notice C.influence D.affect
19.A.then B.as C.so D.which
20.A.to B.in C.of D.for

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Shopping habits in the United States have changed greatly in the last quarter of the 20th century. 1 in the 1900s most American towns and cities had a Main Street.Main Street was always in the heart of a town.This street was 2 on both sides with many 3 businesses.Here, shoppers walked into stores to look at all sorts of merchandise: clothing,furniture,hardware,groceries. 4 ,some shops offered 5 .These shops included drugstores, restaurants, shoerepair stores, and barber or hairdressing shops. 6 in the 1950s, a change began to 7 .Too many automobiles had crowded into Main Street 8 too few parking places were 9 shoppers.Because the streets were crowded, merchants began to look with interest at the open spaces 10 the city limits.Open space is what their cardriving customers needed.And open space is what they got 11 the first shopping centre was built.Shopping centres, or rather malls, 12 as a collection of small new stores 13 crowded city centres. 14 by hundreds of free parking space, customers were drawn away from 15 areas to outlying malls.And the growing 16 of shopping centres led 17 to the building of bigger and betterstocked stores. 18 the late 1970s,many shopping malls had almost developed into small cities themselves.In addition to providing the 19 of onestop shopping, malls were transformed into landscaped parks, 20 benches,fountains,and outdoor entertainment.
1.A.As early as B.Early C.Early as D.Earlier
2.A.built B.designed C.intented D.lined
3.A.varied B.various C.sorted D.mixed up
4.A.Apart from B.However C.In addition D.As well
5.A.medical care B.food C.cosmetics D.services
6.A.suddenly B.Abruptly C.Contrarily D.But
7.A.be taking place B.take placeC.be taken place D.have taken place
8.A.while B.yet C.though D.and then
9.A.available for B.available to C.used by D.ready for
10.A.over B.from C.out of D.outside
11.A.when B.while C.since D.then
12.A.started B.founded C.set up D.organized
13.A.out of B.away from C.next to D.near
14.A.Attracted B.Surprised C.Delighted D.Enjoyed
15.A.inner B.central C.shopping D.downtown
16.A.distinction B.fame C.popularity D.liking
17.A.on B.in turn C.by turns D.further
18.A.By B.During C.In D.Towards
19.A.cheapness B.readiness C.convenience D.handiness
20.A.because of B.and C.with D.provided

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Who won the World Cup 1994 football game? What happened at the United Nations? How did the critics like the new play? 1 an event takes place, newspapers are on the streets 2 the details.Wherever anything happens in the world, reports are on the spot to 3 the news.
　　Newspapers have one basic 4 , to get the news as quickly as possible from its source, from those who make it to those who want to 5 it.Radio, telegraph, television, and 6 inventions brought competition for newspapers.So did the development of magazines and other means of communication. 7 , this competition merely spurred the newspapers on.They quickly made use of the newer and faster means of communication to improve the 8 and thus the efficiency of their own operations.Today more newspapers are 9 and read than ever before.Competition also led newspapers to branch outsintosmany other fields.Besides keeping readers 10 of the latest news, today"s newspapers 11 and influence readers about politics and other important and serious matters.Newspapers influence readers" economic choices 12 advertising.Most newspapers depend on advertising for their very 13 .Newspapers are sold at a price that 14 even a small fraction of the cost ofproduction.The main 15 of income for most newspapers is commercial advertising.The 16 in selling advertising depends on a newspaper"s value to advertisers.This 17 in terms of circulation.How many people read the newspaper? Circulation depends 18 on the work of the circulation department and on the services or entertainment 19 in a newspaper"s pages.But for the most part, circulation depends on a newspaper"s value to readers as a source of information 20 the community, city, country, state, nation, and world—and even outer space. 1.A.Just when B.While C.Soon after D.Before
2.A.to give B.giving C.given D.being given
3.A.gather B.spread C.carry D.bring
4.A.reason B.cause C.problem D.purpose
5.A.make B.publish C.know D.write
6.A.another B.other C.one another D.the other
7.A.However B.And C.Therefore D.So
8.A.value B.ratio C.rate D.speed
9.A.spread B.passed C.printed D.completed
10.A.inform B.be informed C.to be informed D.informed
11.A.entertain B.encourage C.educate D.edit
12.A.on B.through C.with D.of
13.A.forms B.existence C.contents D.purpose
14.A.tries to cover B.manages to coverC.fails to cover D.succeeds in
15.A.source B.origin C.course D.finance
16.A.way B.means C.chance D.success
17.A.measures B.measured C.Is measured D.was measured
18.A.somewhat B.little C.much D.something
19.A.offering B.offered C.which offered D.to be offered
20.A.by B.with C.at D.about

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