问题 单项选择题

产业结构演化论是根据产业结构演进的特点,将经济发展划分为五个时期,按正确的发展顺序排列的是()。①传统结构阶段; ②二元结构时期;③复合结构阶段; ④先进技术主导结构阶段;⑤高度化结构阶段

A.①②③④⑤

B.②①③④⑤

C.②①④③⑤

D.①②③⑤④

答案

参考答案:A

解析:①传统结构阶段是以农业为主体;②二元结构时期是手工操作的农业技术和比较先进的半机械化、机械化、自动化的工业技术并存;③复合结构阶段,工业技术装备普遍扩散到各个产业;④先进技术主导结构阶段,以当代高科技为特征;⑤高度化结构阶段,以完善的高技术体系为标志。由此可排出正确的顺序为①②③④⑤,故选A。

选择题
单项选择题

Throughout the 19th century and into the 20th, citizens of the United States maintained a bias against big cities. Most lived on farms and in small towns and believed cities to be centres of (1) , crime, poverty and moral (2) Their distrust was caused, (3) , by a national ideology that (4) farming the greatest occupation and rural living (5) to urban living. This attitude (6) even as the number of urban dwellers increased and cities became an essential (7) of the national landscape. Gradually, economic reality overcame ideology. Thousands (8) the precarious (不稳定的) life on the farm for more secure and better paying jobs in the city. But when these people (9) from the countryside, they carried their fears and suspicions with them. These new urbanities, already convinced that cities were (10) with great problems, eagerly (11) the progressive reforms that promised to bring order out of the (12) of the city.

One of many reforms came (13) the area of public utilities. Water and sewerage systems were usually operated by (14) governments, but the gas and electric networks were privately owned. Reformers feared that the privately owned utility companies would (15) exorbitant (过渡的) rates for these essential services and (16) them only to people who could afford them. Some city and state governments responded by (17) the utility companies, but a number of cities began to supply these services themselves. (18) of these reforms argued that public ownership and regulation would (19) widespread access to these utilities and guarantee a (20) price.

17()

A.degenerating

B.generating

C.regenerating

D.regulating