生态农业最大的优点是[ ] A．能量的多级利用 B．物质循环再生 C．废物资源化

Cooperation is the common endeavor of two or more people to perform a task or reach a jointly cherished goal. Like competition and conflict, there are different forms of cooperation, based on group organization and attitudes.
In the first form, known as primary cooperation, group and individual unite. The group contains nearly all of each individual’s life. The rewards of the group’s work are shared with each member. There is an interlocking identity of individual, group, and task performed. Means and goals become one, for cooperation itself is valued.
While primary cooperation is most often characteristic of preliterate societies, secondary cooperation is characteristic of many modern societies. In secondary cooperation, individuals devote only part of their lives to the group. Cooperation itself is not a value. Most members of the group feel loyalty, but the welfare of the group is not the first consideration. Members perform tasks so that they can separately enjoy the fruits of their cooperation in the form of salary, prestige, or power. Business offices and professional athletic teams are examples of secondary cooperation.
In the third type, called tertiary cooperation or accommodation, latent conflict underlies the shared work. The attitudes of the cooperating parties are purely opportunistic; the organization is loose and fragile. Accommodation involves common means to achieve antagonistic goals; it breaks down when the common means cease to aid each party in reaching its goals. This is not, strictly speaking, cooperation at all, and hence the somewhat contradictory term antagonistic cooperation is sometimes used for this relationship.

Which of the following is an example of the third form of cooperation as it is defined in Paragraph 4

A．Students form a study group so that all of them can improve their grades.

B．A new business attempts to take customers away from an established company.

C．Two rival political parties temporarily work together to defeat a third party.

D．Members of a fanning community share work and the food that they grow.

汽车计划预防保修制度的主要内容是（）、（）。

增加平行测定的目的是( )。

A．减少系统误差

B．减少偶然误差

C．提高精密度

D．提高分析人员技术水平

爆破施工前应做哪些准备？

下列不属于现代广告事业的任务的是（）。

A.传播经济信息，沟通产销

B.活跃市场，指导消费

C.促进物质文明建设

D.促进精神文明建设