如下图所示的实验中，向一杯冷水中滴入一滴红墨水，你所看到的现象是 ，这说明 ．分子运动的快慢与 有关。为了证明这个猜想请列举一个实例： 。
整杯水变红、分子在不停的做无规则运动、温度、分别向一杯冷水和一杯热水中滴入一滴红墨水，比较两杯水变红的速度。
题目分析：向一杯冷水中滴入一滴红墨水，你所看到的现象是整杯水变红，这说明分子在不停的做无规则运动．分子运动的快慢与温度有关，证明猜想举例：分别向一杯冷水和一杯热水中滴入一滴红墨水，比较两杯水变红的速度。
点评：两种相互接触的物质彼此进入对方的现象叫扩散，扩散现象说明分子不停地做无规则运动．温度越高，扩散进行得越快。
| 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 modem 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 farming community share work and the food that they grow.