Economic distance is connected with the time and money spent in traveling.（）

A.the distance between the buyer and the seller.

B.the nature of the merchandise

C.political and economic stability in either or both countries.

D.the nature and length of the business relationship between the buyer and the seller.

economic advance has been remarkable. During this relatively short period of time, greater changes in people's living conditions have occurred than in the thousands of years which preceded.

During the past 200 years the world population has increased 6 times, the annual world output has increased 80 times, and the distance a person can travel has gone up 1,000 times. There has also been much recent progress in art, culture, learning, and science. Such changes have led to a high rate of production and growth of the economy.

Economists fear that within the next 100 to 150 years, the earth's resources will become very scarce. Their fears are partly justified, but we should not be afraid. Industrial civilization adapts to new knowledge. By advancing knowledge, we not only create new forms of resources, but we also find ways to economize their use. Advanced modern knowledge can feed the hungry people of the world and improve their standard of living.

The figures in the second paragraph are used for the following purposes EXCEPT______.

A．prediction.

B．contrast.

C．definition.

D．explanation.

iffusion of printing in the 15th and 16th centuries. Yet much had happened between. As was discussed before, it was not until the 19th century that the newspaper became the dominant pre- electronic(61), following in the wake of the pamphlet and the book and in the(62)of the periodical. It was during the same time that the communications revolution(63)UP, beginning with transport, the railway, and leading on through the telegraph, the telephone, radio, and motion pictures into the 20th-century world of the motor car and the air plane. Not everyone sees that process in(64). It is important to do so.

It is generally recognized,(65), that the introduction of the computer in the early 20th century,(66)by the invention of the integrated circuit during the 1960s, radically changed the process, although its impact on the media was not immediately(67). As time went by, computers became smaller and more powerful, and they became "personal" too, as well as(68), with display becoming sharper and storage(69)increasing. They were thought of, like people,(70)generations, with the distance between generations much(71).

It was within the computer age that the term "information society" began to be widely used to describe the(72)within which we now live. The communications revolution has(73)both work and leisure and how we think and feel both about place and time, but there have been(74)view about its economic, political, social and cultural implications. "Benefits" have been weighed(75)"harmful" outcomes. And generalizations have proved difficult.

A．means

B．method

C．medium

D．measure