computer technology D.

self—accelerating

technologies

promote

international cooperation

68. According to the passage, what may slow down the accelerating technology?

A. A carefully planned society. B. simple youthful stupidity.

C. People’s stress and exhaustion. D. The rapid change of the market.

69. What’s the author’s purpose in writing the passage?

A. To guide the new technologies for a safe acceleration.

B. To confirm the public concern about new technologies.

C. To explain the threats in technological self-acceleration.

D. To relieve the public fear for technology acceleration.

70. Which of the following shows the development of ideas in this passage?

The

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第二节（共5小题；每小题2分，共10分） 根据短文内容，从短文后的七个选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。 A kiln(窑) is a type of oven or furnace used to cure, harden, or bum certain materials. Depending

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on which materials are heated in it, a kiln may be square, tunnel shaped, or beehive shaped, and usually made of brick or stone. __71__ It may be set as low as sixty-five degrees to cure grain or as high as 3,200

degrees to transform limestone to quicklime （熟石灰）.

__72__ They have a variety of purposes. The cement （水泥）industry uses revolving kilns to heat

and separate raw materials. Bricks, pottery, and china made from clay must be fired, or hardened, in kilns. Certain kinds of coal and wood must be kiln-dried before they can be used. Hobbyists use small kilns to fire a variety of ceramic （陶瓷）objects.

There are two main types of kilns. A periodic kiln, used to fire certain kinds of delicate china, is raised to a high temperature and then completely cooled before its contents are removed. A continuous, or tunnel kiln contains several

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chambers, or zones, which heat, bake, and cool a product. Stacks of clay

bricks move through a tunnel kiln on tracks. __73__

Gas, oil, and coal are all used to heat modern kilns. __74__ But for special jobs, where cleanliness

and careful heat are important, kilns must be heated by electricity oven though it is more expensive. Small kilns used in the home or in craft shops are also heated electrically because electricity is clean and convenient.

__75__ When ancient people discovered that heat hardened some materials, they were able to make durable household objects such as jugs and bowls. Today our museums display many kinds of ancient statues and art objects that have lasted because they had been kiln-dried. They come from lands as far apart as China and Greece. A. Its temperature may vary.

B. Then they come out, hardened, and cooled.

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