应当先履行合同债务的当事人，可以行使不安抗辩权的情形是，有确切证据证明对方( )。

我们要全面考察长城的建筑技术，选择的范围应是[ ]

A．西起临洮东到辽东              

B．西起临洮东到鸭绿江  

C．西起嘉峪关东到鸭绿江          

D．西起嘉峪关东到辽东

下列不属于青春期的正常心理表现的是（　　）

A．自我意识增强

B．内心世界逐渐复杂

C．沉缅于对某位异性的思恋，上课时经历无法集中

D．对所属集体有强烈的归属感和依赖感

开车中，当250℃恒温热紧后，继续升温升至（）℃时，需再进一次恒温热紧。

A．270

B．300

C．350

D．380

市场调研的目的在于为数字出版产品的生产和营销找到（）。

A.市场依据

B.需求依据

C.资源依据

D.技术依据

Sociology is a social science that studies (1) societies, their interactions, and the processes that (2) and change them. It does this by (3) the dynamics of constituent parts of societies (4) as institutions, communities, populations, and gender, racial, (5) age groups. Sociology also studies social status (6) stratification, social movements, and social change, as (7) as societal disorder in the form of (8) , deviance, and revolution.
Social life overwhelmingly regulates (9) behaviour of humans, largely because humans lack (10) instincts that guide most animal behaviour. Humans (11) depend on social institutions and organizations to (12) their decisions and actions. Given the important (13) organizations play in influencing human action, it (14) sociology’s task to discover how organizations affect (15) behaviour of persons, how they are established, (16) organizations interact with one another, how they (17) , and, ultimately, how they disappear. Among the (18) basic organizational structures are economic, religious, educational, (19) political institutions, as well as more specialized (20) such as the family, the community, the military, peer groups, clubs, and volunteer associations.