阅读理解。????Nineteen-year-old Christopher Paolini...

第1题

A lens designer in the past______.A．did their work betterB．did not use glass for making le

A lens designer in the past______.

A．did their work better

B．did not use glass for making lenses

C．was usually poor

D．designed the lens all by himself

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第2题

Glass making was apparently the first industry to be brought from Europe to the United States.

A.predictably

B.regretfully

C.seemingly

D.naturally

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第3题

Glass can be easily molded into all kinds of forms because ______.A．it melts like liquid w

Glass can be easily molded into all kinds of forms because ______.

A．it melts like liquid when heated

B．it softens gradually through varying stages when heated

C．it retains the shape at the point when it is suddenly cooled

D．various heating techniques can be used in making glass

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第4题

The processes of making drinking glasses by Green Glass are a. the bottle is turned upside

down. b. the neck is attached to the base. c. the base is removed from the bottle, d. the glass is heated to strengthen it.

A．a, d, c, b

B．c, a, b, d

C．c, d, b, a

D．a, c, b, d

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第5题

For thousands of years,people thought of glass as something beautiful to look at.Only

recently 21 come to think of it as something look through.Stores 22 their goods in large glass windows.Glass bottles and jars 23 food and drink allow us to see the contents.Glass 24 spectacles(眼镜),microscopes(显微镜),telescopes,and many other very useful and necessary objects,and glasses are used by people who cannot see 25 or by people who want to protect their eyes 26 bright light.Microscopes make tiny things larger 27 we can examine them.Telescopes make objects that are far away appear 28 closer to us.However in recent years plastics have replaced glass 29 conditions where glass might be easily broken.There are new uses being developed for glass that were never imagined in the past.Perhaps the greatest 30 of glass is that its constituent(形成的) parts are inexpensive and can be found all over the world.21.A.they B.do they C.they have D.have they

22.A.protect

B.hide

C.display

D.set aside

23.A.hold

B.held

C.that hold

D.that holding

24.A.used to make

B.is used to make

C.is used to making

D.used to making

25.A.perfectly

B.perfect

C.perfection

D.perfected

26.A.from

B.in

C.with

D.beyond

27.A.so as

B.as that

C.so that

D.such that

28.A.ever

B.rather

C.more

D.much

29.A.under

B.below

C.within

D.on

30.A.goodness

B.advance

C.advantage

D.progress

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第6题

Glass （1)Since the Bronze Age, about 3000 B. C, glass has been used for making various kin

Glass

(1)Since the Bronze Age, about 3000 B. C, glass has been used for making various kinds of objects. It was first made from a mixture of silica, lime, and an alkali such as soda or potash, and these remained the basic ingredients of glass until the development of lead glass in the seventeenth century.

(2) When heated the mixture becomes soft and moldable and can be formed by various techniques into a vast array of shapes and sizes. The homogeneous mass thus formed by melting then cools to create glass, but in contrast to most materials formed in this way (metals, for instance), glass lacks the crystalline structure normally associated with solids, and instead retains the random molecular structure of a liquid. In effect, as molten glass cools, it progressively stiffens until rigid, but does so without setting up a network of interlocking crystals customarily associated with that process. This is why glass shatters so easily when dealt a blow.

(3) Another unusual feature of glass is the manner in which its viscosity changes as it turns from a cold substance into a hot, ductile liquid. Unlike metals that flow or "freeze" at specific temperatures, glass progressively softens as the temperature rises, going through varying moldable stages until it flows like a thick syrup. Each of these stages allows the glass to be manipulated into various forms, by different techniques, and if suddenly cooled the object retains the shape achieved at that point. Glass is thus open to a greater number of heat-forming techniques than most other materials.

According to the passage glass cools and becomes rigid differently from metals because ______.

A．it has an unusually low melting temperature

B．it does not set up a network of interlocking crystals

C．it has a random molecular structure of a liquid

D．it is made from a mixture of silica, lime, and soda

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第7题

Glass （1) Since the Bronze Age, about 3000 B. C., glass has been used for making various k

Glass

(1) Since the Bronze Age, about 3000 B. C., glass has been used for making various kinds of objects. It was first made from a mixture of silica, lime, and an alkali such as soda or potash, and these remained the basic ingredients of glass until the development of lead glass in the seventeenth century.

(2) When heated the mixture becomes soft and moldable and can be formed by various techniques into a vast array of shapes and sizes. The homogeneous mass thus formed by melting then cools to create glass, but in contrast to most materials formed in this way (metals, for instance), glass lacks the crystalline structure normally associated with solids, and instead retains the random molecular structure of a liquid. In effect, as molten glass cools, it progressively stiffens until rigid, but does so without setting up a network of interlocking crystals customarily associated with that process. This is why glass shatters so easily when dealt a blow.

(3) Another unusual feature of glass is the manner in which its viscosity changes as it turns from a cold substance into a hot, ductile liquid. Unlike metals that flow or "freeze" at specific temperatures, glass progressively softens as the temperature rises, going through varying moldable stages until it flows like a thick syrup. Each of these stages allows the glass to be manipulated into various forms, by different techniques, and if suddenly cooled the object retains the shape achieved at that point. Glass is thus open to a greater number of heat-forming techniques than most other materials.

According to the passage glass cools and becomes rigid differently from metals because ______.

A．it has an unusually low melting temperature

B．it does not set up a network of inter3ocking crystals

C．it has a random molecular structure of a liquid

D．it is made from a mixture of silica, lime, and soda

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第8题

Glass is everywhere in our lives. It is so common 【21】______we hardly think about it. We 【

Glass is everywhere in our lives. It is so common 【21】______ we hardly think about it. We 【22】______ it when we look out of the window and if we wear glasses. We drink from it and sometimes eat from it. The light in our homes comes through glass windows in the daytime and from glass lights 【23】______ . Glass 【24】______ in homes, schools, businesses, industry, and automobiles.

Fortunately for us, glass is 【25】______ very inexpensive materials. The main material is sand from quartz rock. The mixture is heated until it becomes a syrupy 【26】______ . When the liquid cools, it becomes glass.

No one knows 【27】______ first discovered glass or how. Early humans used obsidian, a natural glass 【28】______ by volcanoes, to make tools and jewelry. People probably began making glass themselves around 3000 B.C. in Syria. Then in a war 【29】______ Egypt and Syria in 1400 B. C., Syria became part of Egypt. The Egyptians took Syrian glassmakers 【30】______ to Egypt, and over the centuries the entire eastern Mediterranean area became a glassmaking center.

Probably around 300 B.C. the blowpipe 【31】______ . Egyptian glassmakers developed the use of the blowpipe. They specialized 【32】______ beautiful jewelry, dishes, and other containers.

The Romans soon started making their own glass. Then they 【33】______ that glass could be used to make windows. 【34】______ centuries later, Europeans made magnificent church windows 【35】______ colored glass.

【36】______ 1900 companies have developed many new types of glass. Safety glass is a sandwich of glass and plastic. If it breaks, the pieces stay together 【37】______ flying in all directions. This invention is very useful 【38】______ automobile windows.

Today most glass is made 【39】______ machines in large factories. No one 【40】______ it. People use television and computers to control the machines.

【21】

A．that

B．which

C．where

D．as

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第9题

The making of glass is a very old industry--at least 4,500 years old. Glass has many extra

ordinary qualities and it is frequently being used in new ways.

One of the most interesting new uses for glass is in telephone communication. Scientists have developed glass fibers as thin as human hair, which are designed to can-y light signals. When the light reaches the other end, it is first changed into electrical signals, which are in turn converted into sound messages.

Called light wave communication, the new system was used successfully in an experiment in Chicago in 1997. During the experiment, two glass fibers were able to carry 672 conversations at the same time. The lightwave cable, containing 144 glass fibers, has the capacity to carry 50,000 conversations at the same time.

The lightwave communication system has two important advantages. First, the glass fiber cables are smaller and weigh less than copper. Second, they cost less.

Perhaps it can be said that telephone communication has entered the age of light.

One of the extraordinary qualities of glass is that it can carry ______.

A．sound signals

B．light signals

C．electrical signals

D．any signals

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第10题

Which of the following is TRUE according to the passage？A．The new way of recycling used bo

Which of the following is TRUE according to the passage？

A．The new way of recycling used bottles is said to save 10 percent of the energy normally used to make recycled glasses.

B．Each year, Green Glass Company makes 150,000 glasses at most.

C．Many bottles are broken when making a new drinking glass.

D．The seven machines used to make glasses are all designed and built by the company itself.

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第11题

The making of glass is a very old industry -- at least 4 500 years old. Glass has many ext

raordinary qualities and it is often being used in new ways.

One of the most interesting new uses for glass is in telephone communication. Scientists have developed glass fibres as thin as human hair which are designed to carry light signals. When the light reaches the other end, it is first changed into electrical signals which are in turn changed into sound messages.

Called lightwave communication, the new system was used, successfully in an experiment in Chicago in 1977.

During the experiment, two glass fibres were able to carry 672 conversations at the same time. The lightwave cable, containing 144 glass fibres,is able to carry 50 000 conversations at the same time.

The lightwave communication system has two important advantages. First the glass fibre cables are smaller and weigh less than copper cables. Second, they cost less.

Perhaps it can be said that telephone communication has entered the age of light.

According to the passage, people started to make glass ______.

A．4 500 years ago

B．nearly 4 500 years ago

C．less than 4 500 years ago

D．no less than 4 500 3,ears ago

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