问题 问答题 简答题

代数运算的目的是什么?

答案

参考答案:

对于多波段遥感图像和经过空间配准的两幅或多幅单波段遥感图像,可以通过代数运算来突出特定的地物信息,从而达到某种增强的目的。代数运算是根据地物本身在不同波段的灰度差异,通过不同波段之间简单的代数运算产生新的“波段”,来达到突出感兴趣的地物信息、压抑不感兴趣的地物信息的图像增强方法。进行代数运算后,数值范围可能超过了显示设备的范围,因此,在显示的时候往往还需要进行灰度拉伸。

阅读理解

Art museums are places where people can learn about various cultures. The increasingly popular "design museums" that are opening today, however, perform quite a different role. Unlike most art museums, the design museum shows objects that are easily found by the general public These museums sometimes even place things like fridges and washing machines in the center of the hall

Pele have argued that design museums are often made use of as advertisements for new industrial technology. But their role is not simply a matter of sales-it is the honoring of excellently invented products. The difference between the window of a department store and the showcase in a design museum is that the first tries to sell you something, while the second tells you the success of a sale.

One advantage of design museums is that they are places where people feel familiar with the exhihits. Unlike the average art museum visitors, design museum visitors seldom feel frightened or puzzled. This is partly because design museums clearly show how and why mass-produced products work and look as they do, and how design has improved the quality of our lives. Art museum exhibits, on the other hand, would most probably fill visitors with a feeling that there is something between their understanding.

In recent years, several new design museums have opened their door. Each of these museums has tried to satisfy the public’s growing interest in the field with new ideas. London's Design Museum, for example, shows a collection of mass-produced objects from Zippo lighters to electric typewriters to a group of Italian fish-tins. The choices open to design museums seem far less strict than those to art museums, and visitors may also sense the humorous part of our society while walking around such exhibits as interesting and unusually attractive toys collected in our everyday life.

小题1:Showcases in design museums are different from store windows because they_.

A.show more technologically advanced products

B.help increase the sales of products

C.show why the products have sold well

D.attract more people than store windows do小题2:The author believes that most design museum visitors_.

A.do not admire mass-produced products

B.are puzzled with technological exhibits

C.dislike exhibits in art museums

D.know the exhibits very well小题3:The choices open to design museums_

A. are not as strict as those to art museums

B, are not aimed to interest the public

C. may fail to bring some pleasure to visitors

D. often contain precious exhibits

小题4:The best title for this passage is“_”

A.The Forms of Design Museums

B.The Exhibits of Design Museums

C.The Nature of Design Museums

D.The Choices Open to Design Museums

综合题

阅读下列材料:

材料一:建立一个世界上所有国家都参加的联盟,不管是大国还是小国,一起合作来维持和平,这是威尔逊总统梦寐以求的事……联盟。从来就没有取得它的创始人所期望达到的出色成就……在所有重大危机中,人们要么不是不听联盟的话,要么就是根本不理睬它。

———波恩斯·拉尔夫《世界文明史》

材料二:国联最终没有能够制止二战爆发。有其自身结构上的原因:国联成立仓促,从建议的提出到正式成立,时间短,没有进行充分准备;美苏这两个具有世界影响的大国长期处于国联之外,操纵国联的是英法这样的二流国家,严重削弱了国联的权威。国联大会和行政院各自职权规定不清,大会全体一致通过的决议才能有效,极大地限制了国联的行动能力。

———《世界近代现代史教学参考》

材料三:早在20世纪60年代,亚洲和非洲的成员国已经占有联合国大会过半数的席位。美国失去了原先能够组成的对付苏联的多数。第三世界国家。尽管奉行不结盟政策,但是却百般挑剔美国,他们大多数一贯在所有的问题上投票反对美国。

———尼伯尔默等《现代世界的历史》下

材料四:伴随着苏联解体、美苏对抗的消失和日本经济实力的大大增强,日本越来越不满足“经济强国”的地位,积极谋求与之相应的“军事强国”和”政治大国”地位。为此,日本众议院通过了允许向海外派遣自卫队协助联合国维和行动的法律,并谋求联合国安理会常任理事国的席位。

———《中学历史教学参考丛书》

请回答:

(1)国联、联合国成立时标榜的共同目的是什么?两个组织成立后初期是否达到这一目的?为什么?

(2)结合材料二以及所学知识,说明联合国的作用得到改变的必然性。

(3)有报道说日本越来越不满足“经济强国”的地位,积极谋求与之相应的“军事强国”和“政治大国”地位……谋求联合国安理会常任理事国的席位。你是否同意日本成为联合国“安理会常任理事国”?理由是什么?