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问题 单项选择题

近年来，“限”已成为热词，楼市“限”价、“限”购，电视节目“限”播、“限”娱；温室气体“限”制排放……从经济生活的角度看，“限”是（）

①发挥宏观调控在部分资源配置中的决定性作用

②为了促进经济平稳健康运行的需要

③运用法律手段实施宏观调控

④因为市场调节具有自身的弱点和缺陷

 

A.①④

B.②③

C.②④

D.①②

答案

参考答案：C

解析：

材料中的措施是政府采取强制性的行政命令进行宏观调控的表现，是为了弥补市场调节的缺陷和弊端，促进国民经济平稳健康发展的需要。由此可见，②④两项符合题意。题肢①错误，在市场经济条件下，市场在国家宏观调控下对资源配置起决定性作用，故答案选C。

考点：市场调节与宏观调控

单项选择题

下列关于流感病毒及其致病性的描述错误的是

A．甲型流感病毒易发生抗原转变，而使人群对新病毒株缺乏免疫力
B．丙型流感病毒不发生变异，抗原性稳定
C．流感病毒不能进行组织细胞培养，因此只能依靠血清学实验进行病原学诊断
D．流感病毒通过空气飞沫传播，主要引起呼吸道感染
E．甲型流感较乙型及丙型流感病情严重
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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.

（13）（）

A.at

B.by

C.out

D.in
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