问题 单项选择题

通观全文,准确说明蓝蝶翅膀独特的光学性能的一项是( )。

A.反射70%以上的蓝光,远远超过蓝色涂料的反射率。

B.光线反射率极高,反射光具有广角性和颜色选择性。

C.具有很强的方向性,对于垂直入射光的反射率极高。

D.反射光耀眼生辉,对半公里以外的雄蝶有示警作用。

答案

参考答案:B

解析:A项“反射70%以上的蓝光,远远超过蓝色涂料的反射率”,不准确。文中第一段原句说的是“有的竟能射70%的蓝色光线”,可知“反射70%以上的蓝光”,是极而言之,并非所有蓝蝶翅膀都如此。C项说的是“人造多层介质反射镜”的光学性能。第二段说得很明确:“人造多层介质反射镜的反射光有很强的方向性:对接近垂直入射的单色光线反射率极高”。如果误选了C项,说明对信息的“筛选”过于草率。D项说的不是“光学性能”。第一段说“蓝蝶耀眼的光辉,原是一种警号,使别的雄性蓝蝶在远处就能知所趋避”,据此可知,这种示警作用属于一种独特的生物本能。如果能“理解并解释”第一段中这些“重要的句子”,排除D项就不成问题。

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.

As used throughout the passage, the term "common" is closest in meaning to which of the following

A.ordinary.

B.shared.

C.simple.

D.popular.

单项选择题 案例分析题