Here’sanamazingwaytogetahardbo

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更新 2022-09-03
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Here’s an amazing way to get a hard-boiled egg into a bottle, even though the mouth of the boiled is smaller than the egg! What’s more, you don’t even need to touch the egg to get it to go in!
For this experiment you will need:
·a hard-boiled egg
·a glass bottle with a mouth just slightly smaller than the egg (a fruit-drink bottle works well)
·a 8-cm by 8-cm(3-inch by 3-inch)piece of newspaper
·a match
Remove the shell from the egg. Set the egg on the mouth of the bottle to see that the egg does not fit through the mouth.
Light the paper. Remove the egg from the mouth of the bottle and drop the burning paper into the bottle. Before the fire goes out, set the egg back onto the mouth of the bottle. Within a few seconds the egg will squeeze(挤) through the mouth and into the bottle.
As it entered the bottle, the egg may have broken into pieces. This happens when the diameter(直径) of the egg is more than about 0.5 cm(about 3/16 inch) larger than the diameter of the bottle’s opening.
Why does the egg slide into the bottle, even though no one is pushing it? Because the pressure of the air is pushing it. Before the burning paper is put into the bottle, the pressure of the air inside is the same as outside. The burning paper, however, heats the air inside. This causes the air inside to expand. When the egg is placed on top of the bottle, it seals(封住) the bottle. When the fire goes out, the air inside cools. As it cools, the air contracts(紧缩), and the pressure of the air inside becomes less than the pressure outside. Then, the higher outside pressure pushes the egg into the bottle!
The best title of this passage can be .

A．An interesting story	B．The pressure of the air
C．Egg in a bottle	D．Egg, bottle and match

What don’t you need in this experiment?

A．Eggs.

B．Water.

C．Bottles.

D．Paper.

Why will the egg break into pieces while entering the bottle?

A．Because of the burning paper.

B．Because the diameter of the egg is too larger than that of the bottles opening.

C．Because it is cool inside the bottle.

D．Because the pressure of the air inside is larger.

What is the most important to get the egg into a bottle?

A．A match.

B．A fruit-drink bottle.

C．The pressure of the air.

D．The burning paper.

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In 1790 the first sewing machine was patented. The inventor was an Englishman called Thomas Saint. There was nothing to match his machine for forty years, and then someone built a similar device. He was a Frenchman, Bartelemy Thimonier. Neither of these early machines worked very well, however. It wasn’t until 1846 that an inventor came up with a really efficient（高效的）sewing machine. He was an American, Elias Howe and his machine was good enough to beat five skilled sewing women. He didn’t make much money from it, however. The first commercially（商业的）successful sewing machine was patented by Isaac Singer five years later.
Today, we take washing machines for granted, but there was none before 1869. The revolving drum（旋转桶）of that first machine set a pattern for the future, but it was crude by today’s standards. The drum was turned by hand, and needed a lot of effort. Eight years passed before someone produced an electric washing machine. The world had to wait even longer for a machine to dry clothes. The first spin-drier was another American invention, patented in 1924; but it was 20 years before such machines were widely used.
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57. Inventors patent the inventions so as to __________ .
A. produce more machines               B. avoid being copied by others
C. make the inventions more popular       D. make more money
58. Whose sewing machine could do far more than the work that was done by five skilled sewing   women?
A. Thomas Saint’s.                 B. Bartelemy Thimonier’s.
C. Elias Howe’s.                   D. Isaac Singer’s.
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A. follow the pattern of the first revolving drum but improve it much
B. only imitate the first washing machine
C. power the first ever-made washing machine by electricity
D. have to wait for the first spin-drier for a long time
60. The underlined word “crude” in the sentence “but it was crude by today’s
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Consider the recent yearly conference of the Shakespeare Association of America in Washington, where more than 600 people who study or admire Shakespeare from 18 countries took in topics like ''Whither Attribution Studies,'' ''Unpopular Shakespeare'' and ''Sex Me Here,'' a talk on breast-feeding and Lady Macbeth.
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C. To celebrate Shakespeare’s birthday and study his works.
D. To discuss how to teach students using Shakespeare’s plays.
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A. Washington D.C.                                           B. Shakespeare Association.
C. The birthday anniversary.                 D. The Shakespeare business.
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A. King Lear.              B. Hamlet.        C. Macbeth.              D. Romeo and Juliet.
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A. More and more people are becoming interested in Shakespeare.
B. Shakespeare business is being run well in America nowadays.
C. Plays by Shakespeare can be used at school for more studies.
D. Shakespeare belongs not only to Britain but also to the USA.

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