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  When you see or hear the word ‘glass’, most of you will think first of what is used for windows and bottles, which is easily broken.But great changes have taken place in the making of glass.Now it can be made as hard as steel or as soft as silk, as light as paper or as heavy as iron.

  We don’t know just when or where man first started making glass, but the oldest man-made pieces of it have been found in the Middle East.It was soon discovered that many different kinds of glass could be made by adding different kinds of chemicals.

  As centuries passed, people could make many useful things of glass, and almost everybody came to make some use of it.Not long ago, plastics, metal and paper began to take the place of many glass bottles, drinking glasses, containers, and so on.So glassmakers realized they needed to improve their products and find new uses for it.It is often said that necessity is the mother of invention.This has proved to be true, because they are now making glass that will bend, stretch, resist great heat and pressure, and do many other useful and interesting things.Today there are over one hundred thousand methods for the making of glass.

  There is an old saying,“People who live in glass houses shouldn’t throw stones.”But now it is safe to live in a glass house, because we have a type of glass that can hardly be broken.It is so strong that it is being used for the wall of large buildings.The walls can be of any colour and they need no care.

  Another type of glass becomes stronger as the pressure on it increases.It can even be used in space travel.The heads of missiles(導(dǎo)彈)are made of a type of glass.

  So glass is proving to be the most valuable in many uses.We can hardly do without it in the modern world.

(1)

When we speak of glass, most of us think it ________

[  ]

A.

easy to break

B.

hard as steel

C.

soft as silk

D.

heavy as iron

(2)

The passage shows that ________

[  ]

A.

glass was first made in the Middle East

B.

Chinese began to make glass first

C.

the making of glass developed with a long history

D.

the plastics, metal and paper have taken the place of glass

(3)

To meet the demand of the market, glass-makers ________

[  ]

A.

stopped making the easily-broken glass

B.

didn’t produce any glass bottles any more

C.

began to make some plastic products instead

D.

kept on improving their products

(4)

According to the passage, ________

[  ]

A.

glass will take the place of plastics, metal and paper

B.

glass will be widely used in our daily life

C.

man can build over one hundred kinds of houses made of glass

D.

glass can’t be broken by stones

(5)

Choose the best title for this article, ________

[  ]

A.

Broken Glass

B.

The Valuable Substance

C.

Glass Used in Building

D.

Strangest Glass

答案:1.A;2.C;3.D;4.B;5.B;
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科目:高中英語(yǔ) 來(lái)源:設(shè)計(jì)必修一英語(yǔ)北師版 北師版 題型:050

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How Long Can People Live?

  She took up skating at age 85, made her first movie appearance at age 114, and held a concert in the neighborhood on her 121st birthday.

  Whe n it comes to long life, Jeanne Calment is the world’s recordholder.She lived to the ripe old age of 122.So is 122 the upper limit to the human life span(壽命)?If scientists come up with some sort of pill or diet that would slow aging, could we possibly make it to 150-or beyond?

  Researchers don’t entirely agree on the answers.“Calment lived to 122, so it wouldn’t surprise me if someone alive today reaches 130 or 135,”says Jerry Shay at the University of Texas.

  Steve Austad at the University of Texas agrees.“People can live much longer than we think,”he says.“Experts used to say that humans couldn’t live past 110.When Calment blew past that age, they raised the number to 120.So why can’t we go higher?”

  The trouble with guessing how old people can live to be is that it’s all just guessing.“Anyone can make up a number,”says Rich Miller at the University of Michigan.“Usually the scientist who picks the highest number gets his name in Time magazine.”

  Won’t new anti-aging techniques keep us alive for centuries?Any cure, says Miller, for aging would probably keep most of us kicking until about 120.Researchers are working on treatments that lengthen the life span of mice by 50 percent at most.So, if the average human life span is about 80 years, says Miller,“adding another 50 percent would get you to 120.”

  So what can we conclude from this little disagreement among the researchers?That life span is flexible(有彈性的),but there is a limit, says George Martin of the University of Washington.“We can get flies to live 50 percent longer,”he says.“But a fly’s never going to live 150 years.”

  “Of course, if you became a new species(物種),one that ages at a slower speed, that would be a different story,”he adds.

  Does Martin really believe that humans could evolve(進(jìn)化)their way to longer life?“It’s pretty cool to think about it,”he says with a smile.

(1)

What does the story of Jeanne Calment prove to us?

[  ]

A.

People can live to 122.

B.

Old people are creative.

C.

Women are sporty at 85.

D.

Women live longer than men.

(2)

According to Steve Austad at the University of Texas, ________.

[  ]

A.

the average human life span could be 110

B.

scientists cannot find ways to slow aging

C.

few people can expect to live to over 150

D.

researchers are not sure how long people can live

(3)

Who would agree that a scientist will become famous if he makes the wildest guess at longevity?

[  ]

A.

Jerry Shay.

B.

Steve Austad

C.

Rich Miller

D.

George Martin

(4)

What can we infer from the last three paragraphs?

[  ]

A.

Most of us could be good at sports even at 120.

B.

The average human life span cannot be doubled.

C.

Scientists believe mice are aging at a slower speed than before.

D.

New techniques could be used to change flies into a new species.

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