损坏、盗窃公路设施的处罚可分为（）A、返还原物 B、恢复原状 C、赔偿损失 D、没收非法所

苯二氮䓬类药物的基本结构为：

苯二氮䓬A环上7位的取代基的性质对生物活性影响较大，下列叙述中错误的是（）

A.当7位引入吸电子取代基时，药物活性明显的增强

B.吸电子越强，作用越强，其次序为NO>Br>CF>Cl

C.硝西泮活性比地西泮强

D.氯硝西泮活性比地西泮强

E.奥沙西泮活性比地西泮强

阅读理解.

     There are many thoughts on the origins of civilization. One of the major factors involved

was the increase in population. The development of techniques, primarily irrigation and

flood control, which permitted agriculture in special areas such as the flood plain of the

Tigris and Euphrates rivers, made possible the support of large population. Once

populations reach a certain number, the older pattern of social organization breaks down

and new ones develop. Specifically the older system, whereby each individual participated

in food production and maintained a similar standard of living and whereby kinship

(家属关系) served as the basic method of social organization, was replaced by the

occupational division of labor, political and religious hierarchies (等级制度) public works

such as road and public building construction, class systems, codes of law, markets,

new forms of warfare, and urban centres. Allied with these important sociological traits

are material traits, such as monumental architecture and the development of science and,

in many cases, metallurgy (冶金学) and writing systems.

     The earliest civilization, Sumer, developed in the Middle East. This was the Bronze

Age of the Old World, during which people first developed the art of metallurgy,

civilization also arose in other parts of the Old World first in Egypt, China, and India,

and later in Europe and Africa. At this time, civilization also developed independently in

the New World, in the Mexican area and in Peru and its neighboring areas.

      In the Old World the Bronze Age was followed by the Iron Age, which saw the rise

and fall of great empires and the shift of power from the Middle East to Greece and

Rome and then to Western Europe. In the 1700s the Industrial Age began, leading

directly to the modem civilization of today.

1. The author of this passage ______.

A. gives a comparison between ancient civilization and modern civilization

B. suggests that population increase is most important in the development of civilization

C. tries to explain how civilization developed in human history

D. explore the relation between agriculture and industry

2. According to the first paragraph, the increase in population ______.

A. resulted in the development of agricultural technology

B. resulted from the breakdown of old social organization

C. caused the occupational division of labor

D. was impossible without the development of agriculture

3. Which of the following is NOT tree according to the passage?______

A. The Bronze Age is one of the earliest civilizations.

B. The Industrial Age started in the Middle East.

C. The Bronze Age developed into the Iron Age.

D. The use of metal instruments started from the Bronze Age.

4. Which of the following is NOT included in the expression "the Old World" used

in the passage?______

A. American continent.

B. Both Western and Eastern Europe.

C. African continent.

D. Asian countries.

对于变压器阻抗保护而言，汲出电流一般使测量阻抗增大

环氧树脂自流平地面表面平整度应符合（）mm。

A、≤2

B、≥2

C、≤3

D、≥3

微型计算机按照结构可以分为

A．单片机、单板机、多芯片机、多板机

B．286机、386机、486机、Pentium 机

C．8位机、16位机、32位机、64位机

D．以上都不是