问题 单项选择题

中国古代农业耕种技术史上的第一次动力革命是()

A.牛耕

B.铁家具

C.翻车

D.筒车

答案

参考答案:A

解析:春秋战国时期已有了铁农具,铁犁的使用对提高耕作效率和耕作质量起了重大作用,但使用铁犁所需动力也较大,人力难以适应需要,因此迫切要求解决拉犁的动力问题,于是畜力就作为一种牵拉动力应用到耕作中来了,而当时牛是拉犁的主要畜力,牛耕即应运而生。因此选A。考点:古代中国的经济·农业的主要耕作方式·小农经济产生的条件、特点和评价。

单项选择题
单项选择题

Comparisons were drawn between the development of television in the 20th century and the diffusion 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.

(67)处填()。

A.apparent

B.desirable

C.negative

D.plausible