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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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更多“The making of glass is a very …”相关的问题

第1题

Directions: There are five reading passages in this part. Each passage is followed by five

questions. For each question there are four suggested answers marked A, B, C and D. Choose the best answer and blackening the corresponding letter on the answer sheet.

Passage One

Artificial flowers are used for scientific as well as for decorative purposes. They are made from a variety of materials, such as wax and glass, so skillfully that they can scarcely be distinguished from natural flowers. In making such models, painstaking skill and artistry are called for, as well as thorough knowledge of plant structure. The collection of glass flowers in the Botanical Museum of Harvard University is the most famous in North America and is widely known throughout the scientific world. In all, there are several thousand models in colored glass, the work of two artists-naturalists, Leopold Blaschka and his son Rudolph.

The intention was to have the collection represent at least one member of each flower family native to the United States. Although it was never completed, it contains more than seven hundred species representing 164 families of flowering plants, a group of fruits showing the effect of fungus diseases, and thousands of flower parts and magnified details. Every detail of these is accurately reproduced in color and structure. The models ate kept in locked cases, as they are too valuable and fragile for classroom use.

31. Which of the following is the best title for the passage？

A. An Extensive Collection of Glass Flowers.

B. The Live Leopold and Rudolph Blaschka.

C. Flowers Native to the United States.

D. Materials Used for Artificial Flowers.

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第2题

Artificial flowers are used for scientific as well as for decorative purposes. They are ma

de from a variety of materials, such as wax and glass, so skillfully that they can scarcely be distinguished from natural flowers. In making such models, painstaking skill and artistry are called for, as well as thorough knowledge of plant structure. The collection of glass flowers in the Botanical Museum of Harvard University is the most famous in North America and is widely known throughout the scientific world. In all, there are several thousand models in colored glass, the work of two artists-naturalists, Leopold Blaschka and his son Rudolph.

The intention was to have the collection represent at least one member of each flower family native to the United States. Although it was never completed, it contains more than seven hundred species representing 164 families of flowering plants, a group of fruits showing the effect of fungus diseases, and thousands of flower parts and magnified details. Every detail of these is accurately reproduced in color and structure. The models ate kept in locked cases, as they are too valuable and fragile for classroom use.

Which of the following is the best title for the passage？

A．An Extensive Collection of Glass Flowers.

B．The Live Leopold and Rudolph Blaschka.

C．Flowers Native to the United States.

D．Materials Used for Artificial Flowers.

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第3题

Each day every person in the United States throws away more than five pounds of garbage（垃

Each day every person in the United States throws away more than five pounds of garbage(垃圾). There is more garbage now than ever before and most of it is made up of the packages and cans in which we put our food. The traditional way of getting rid of solid wastes is quickly becoming inadequate. Many cities are experimenting with newer ways of handling their growing piles of garbage.

One of these new ways is "recycling"(回收使用). Through recycling usable materials are taken out of garbage and made into something else. These usable parts of garbage are put through the cycle of going from a raw material to a finished product again.

In some cities a machine called Hydrapulper is being used to help recycle garbage. A Hydrapulper is like a huge mixing machine. The garbage is dropped onto a conveyor belt (传送带) that feeds the machine. At the same time, water is pumped into the Hydrapulper. With a mixing action, the Hydrapulper throws out the heavy metal objects that can later be sold as waste metal. The rest of the garbage—paper, food, plastic, rubber, glass, wood, leaves, and other items—falls apart. The waste is then mixed with water and carried to another piece of equipment where glass, sand and small pieces of metal are thrown out.

With the Hydrapulper, up to 95 percent of the original garbage is made again useful. The rest turns into furnace ash(炉灰).

Traditionally, garbage is thought to be ______.

A．a worthless burden to big cities

B．something that can be reused

C．a raw material for making new products

D．able to be recycled but difficult to handle

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第4题

Olympic swimmer Michael Phelps【C1】______Sunday that he had【C2】______in "regrettable" behav

ior. and "demonstrated bad【C3】______" after a photo was published that appeared to【C4】______him smoking cannabis(大麻制品). A British newspaper, The News of the World, published the【C5】______allegedly showing the multiple Olympic gold medal-winner inhaling from a glass pipe which is gene rally used to【C6】______the drug. "I engaged in behavior. which was regrettable and demonstrated bad judgment," Phelps said in a【C7】______, "Im 23 years old, and【C8】______the successes I have had in the【C9】______, I acted in a youthful and【C10】______way, not in a manner that people have come to expect from me." "For this, I am sorry. I promise my fans and the public—it will not happen again." The US Olympic Committee【C11】______disappointment in the swimmer, who on January 22 was named the USOCs Sportsman of the Year for making Olympic history in Guangzhou by collecting the most【C12】______won by any athlete at a single Games, giving him a total of 14 golds. "We are disappointed in the behavior. recently【C13】______by Michael Phelps." Michael is a role model, and he is well【C14】______of the responsibilities and accountability that come with setting a【C15】______example for others,【C16】______young people. In this instance, regrettably, he failed to【C17】______those responsibilities, the USOC said. The photograph shows Phelps,【C18】______a white T-shirt and a baseball cap back to front,【C19】______the pipe—known as a bong—to his lips and apparently inhaling. The tabloid(小报)quoted a party goer as saying: "You could tell Michael had smoked before. He grabbed the bong and a lighter and knew exactly【C20】______to do."

【C1】

A．declared

B．realized

C．admitted

D．promised

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第5题

Anyone who has ridden on a railroad train knows how rapidly another train【36】by when it is

traveling in the【37】direction and conversely how it may look almost【38】when it is moving in the same direction.【39】a train at a station starts to move forward【40】gently that passengers feels no backward movement【41】.Then if they happened to【42】the window and see another train slide past on the next track, they have no way of knowing【43】train is in motion and which is at rest;【44】can they tell how fast either one is moving or in which direction The only way they can judge their【45】is by looking out the other side of the car for some fixed body of reference【46】the station platform. or a single fight. Newton was【47】these tricks of motion, only he thought in terms of ships. He knew that on a calm day at sea a sailor can shave himself or drink soup as【48】as when his ship is lying motionless in harbor. The water in his basin, the soup in his bowl, will remain【49】whether the ship is making five knots, 15 knots or 25 knots. So【50】he looks hard at the sea it will be【51】for him to know how fast his ship is moving or indeed if it is moving at all. Of course, if the sea should get rough or the ship changes course suddenly,【52】he will sense his state of motion. But even supposing that we have the idealized conditions of a glass calm sea and a silent ship, nothing that happens below decks -- no amount of observation or mechanical experiment performed inside the ship --will reveal its velocity through the sea. The physical【53】based on these facts was formulated by Newton in 1687."The motions of bodies included in a given space , he wrote, "are the same【54】themselves, whether that space is at rest or moves uniformly【55】in a straight line."

(66)

A．passes

B．goes

C．flashes

D．moves

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第6题

The beautiful ______ are made of a special kind of ______ in these factories.A．glass; glas

The beautiful ______ are made of a special kind of ______ in these factories.

A．glass; glass

B．glass; glasses

C．glasses; glass

D．glasses; glasses

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第7题

______ such articles as window glass, porcelain and other breakable things of this nature, the insur

ance company insures this risk ______ 5% franchise.

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第8题

A) plastered B) glass C) fragile D) limited

A) plastered

B) glass

C) fragile

D) limited

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第9题

According to the passage, which of the following four groups of garbage is ready for burni

ng？

A．food scraps and metals

B．paper and glass

C．metals and glass

D．food scraps and paper

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第10题

A. petrolB. advice C. glass D. glasses

A.petrol

B. advice

C. glass

D. glasses

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