断续周期工作制的特征是（）。 A.t1≥4T B.t2≥4T C.t1 D.t2

绝对值等于本身的数是（    ）．相反数等于本身的数是（    ），绝对值最小的负整数是（    ），绝对值最小的有理数是（    ）。

头寸

治疗阴虚阳亢所致的烦躁不安，心悸失眠，头晕目眩，耳鸣者，应首选：（ ）

A．决明子

B．地龙

C．钩藤

D．牡蛎

E．酸枣仁

阅读下列材料，结合所学知识回答问题。

材料一：在马克思之前，所有重大革命——英国革命、美国革命和法国革命——都发生在西方。但在20世纪，所有重大革命都发生在第三世界（落后国家）：1917年——俄国、1949年——中国……。20世纪90年代……由于计划经济的失败，1917年以来在第三世界建立的新的革命 * * 相继垮台。

——以上材料均引自斯塔夫里阿诺斯《全球通史》

材料二：鸦片战争以后的100多年时间里，中国在西方国家的眼中一直是一个弱小国家，但新中国成立以来尤其是最近30年的发展颠覆了这个形象。

综合上述，指出“中国最近30年的发展”的突出表现，并阐释该发展的原因。

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