estimate/'ɛstə,met/（）

听力原文：W: Good morning

M: Good morning.

W: Well, what are your predictions about the world？ What is it going to be like in the year 2020？

M: Hum, if present trends continue, I'm afraid the world in 2020 will be more crowded and more polluted than the world we live in now.

W: Don't you think we will be able to cope with the increase in world population？

M: I don't think so. Even though production is constantly increasing, the people of the world will be poorer than they are today. For hundreds of millions of the desperately poor, the supply of food and other necessities of life will not be any better. And for many they will be worse, unless the nations of the world do something to change the current trends.

W: What is your estimate of world population in the year 2020？

M: If present trends continue, that is with the number of births by far exceeding the number of deaths. In 2020 the world population could approach 6,500 million people.

W: How many people are born every day？

M: About 250 every minute, but only 100 people die!

W: That's worrying! Will there be enough oil to satisfy our needs in the year 2020？

M: During the 2000s, world oil production will reach the maximum and the price of oil will begin to increase. At the next ten years of the century, the available supplies will not be sufficient for our needs. So, at lest part of these needs will have to be met by alternative sources of energy.

W: Well, that's a warning that we all need to take seriously. And with that warning, we end part one of this week's.

(23)

A．Increase food production.

B．Increase oil production.

C．Birth control.

D．All of above.

听力原文：W: Good morning.

M: Good morning.

W: Well, what are your predictions about the world？ What is it going to be like in the year 2020？

M: Hum, if present trends continue, I'm afraid the world in 2020 will be more crowded and more polluted than the world we live in now.

W: Don't you think we will be able to cope with the increase in world population？

M: I don't think so. Even though production is constantly increasing, the people of the world will be poorer than they are today. For hundreds of millions of the desperately poor, the supply of toad and other necessities of life will not be any better. And for many they will be worse, unless the nations of the world do something to change the current trends.

W: What is your estimate of world population in year 2020？

M: If present trends continue, that is with the number of births by far could approach 6,500million people.

W: How many people are born every day？

M: About 250 every minute, but only 100 people die!

W: That's worrying! Will there be enough oil to satisfy our needs in the year 20207

M. During the 2000s, world oil production will reach the maximum and the price of oil will begin to increase. At the next ten years of the century, the available supplies will not be sufficient for our needs. So , at least part of these needs will have to be met by alternative sources of energy.

W: Well, that's a warning that we all need to take seriously. And with that warning, we end part one of this week's.

(23)

A．Increase food production.

B．Increase oil production.

C．Birth control.

D．All of above.

de Center Twin Towers did a good job in designing the buildings. The buildings were safe from the hazards envisioned at the time. Indeed, they were designed to withstand the force of aircraft that might crash into them. They were not, however, designed to withstand the effects of the very high temperatures generated by the ignition of tons of aviation fuel carried by the aircraft.

Steel lightly covered with concrete is the main structural component of the towers and steel loses a lot of structural strength when heated to 1,100 degrees Centigrade and beyond, as it was. To shield the steel the towers beams(柱梁) were c0ated with a few centimeters of concrete. That insulation was to provide structural integrity for at least 1 hour of fire. The towers met that test. The south tower lasted 62 minutes. The north, 103 minutes. Tragedy followed when not all could escape prior to the collapse.

Most experts agree that the Twin Towers were very. well designed. Many also agree that the pan pie planning the attacks were very knowledgeable and aimed the aircraft at a height that would effect the most damage. The aircraft crash and the resulting fuel fed fires were aimed at about the 90th floor. That was just high enough to insure that the upper floors would weaken with the heat and crack down, dropping into the remaining part of the building. The mass of the falling top floors created such a falling load that some experts estimate it exceeded by 5 to 10 times normal bearing loads. The effect was like a giant hammer, each floor contributing more weight to be born by the next floor down.

Were the Trade Towers well designed？ Engineers say yes. But, the public refers to the belief that architects will never again design a tall building without considering the effects of terrorist attacks of all potential kinds. That not only includes the ability of the structure to withstand attack but the means to allow the buildings occupants(居住者) to escape in time to survive.

According to the article, those who designed the tower could have done better if ______.

A．the tower lasted longer after being attacked

B．the tower hold stable until all of the people there managed to escape

C．the tower can be immune to such attacks

D．they considered more about the effects of the very' high temperatures and make duel changes in the structure

A.think

B.believe

C.estimate

D.hope

A.count

B.estimate

C.number

D.calculate

A.估计；估算

B.长度

C.请求；要求

A.evaluate

B.estimate

C.value

D.judge

The estimate that ______ (多达三分之一的求职者没有找到工作) proved to be false.

ed overseas, ______.