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问题 实验题

某同学做验证阿基米德原理的实验，如图所示，完成下列各题。

（1）实验的合理步骤是：_____________。

（2）将图中的数据填入表中

（3）计算物体受到的浮力F浮= ________N。

（4）物体排开的液重G液= _______N。

（5）实验的结论是：__________________________________。

答案

（1）BACD；

（2）4，3，0.5 ，1.5；

（3）1；

（4）1；

（5）浸入液体中的物体所受的浮力大小等于物体排开的液体的重。

单项选择题

某患者疑胆管结石行ERCP检查，4小时后剑突下偏左出现持续性疼痛并呕吐。查体：体温37.8℃，剑突下偏左轻压痛，无反跳痛和肌紧张。

行ERCP术后处理，下列哪项是错误的（）。

A.禁食

B.保持胃肠道通畅

C.制酸

D.术后不用抗生素

E.检测血淀粉酶
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单项选择题

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.

According to the passage, why do people join groups that practice secondary cooperation

A. To share the happiness with others.
B. To get rewards for themselves.
C. To associate with people who have similar backgrounds.
D. To defeat a common enemy.
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