问题 填空题

甲气体通入澄清石灰水中,石灰水无明显变化;将灼热至发红光的黑色固体放到装有甲气体的集气瓶中,乙继续燃烧,发出白光,并生成新的气体丙,乙熄灭后,往集气瓶中加入澄清石灰水,石灰水变浑浊.则:

(1)这些物质分别是:甲______ 乙______  丙______

(2)甲与乙反应的文字表达式为______.从反应的类型来看,这个反应 属于______反应.我还能写出一个与这个反应具有相反特点的化学反应(文字表达式)______.

答案

根据灼热的黑色固体乙与甲气体能生成使澄清石灰水变浑浊的气体丙,可推测乙是碳,甲是氧气,丙是二氧化碳,对应以上题干中物质间反应的现象可知该推测正确;

(1)由以上分析可知甲是氧气,乙是碳,丙是二氧化碳;

(2)碳与氧气反应产物是一氧化碳,其文字表达式为碳+氧气

点燃
二氧化碳,该反应的特征符合“多变一”的化合反应特征,与这个反应具有相反特点的化学反应应该是“一变多”的分解反应,如碳酸钙
高温
氧化钙+二氧化碳等;

故答案为:(1)氧气;碳;丙是二氧化碳;(2)碳+氧气

点燃
二氧化碳;化合;碳酸钙
高温
氧化钙+二氧化碳;

填空题
阅读理解

Picture a typical MBA lecture theatre twenty years ago. In it the majority of students will have conformed to (符合) the standard model of the time: male, middle class and Western. Walk into a class today, however, and you’ll get a completely different impression. For a start, you will now see plenty more women—the University of Pennsylvania’s Wharton School, for example, boasts that 40% of its new enrolment is female. You will also see a wide range of ethnic groups and nationals of practically every country.

It might be tempting, therefore, to think that the old barriers have been broken down and equal opportunity achieved. But, increasingly, this apparent diversity (多样化) is becoming a mask for a new type of conformity. Behind the differences in sex, skin tones and mother tongues, there are common attitudes, expectations and ambitions which risk creating a set of clones among the business leaders of the future.

Diversity, it seems, has not helped to address fundamental weaknesses in business leadership. So what can be done to create more effective managers of the commercial world? According to Valerie Gauthier, associate dean at HEC Paris, the key lies in the process by which MBA programmes recruit (招聘) their students. At the moment candidates are selected on a fairly narrow set of criteria such as prior (以前的) academic and career performance, and analytical and problem solving abilities. This is then coupled to a school’s picture of what a diverse class should look like, with the result that passport, ethnic origin and sex can all become influencing factors. But schools rarely dig down to find out what really makes an applicant succeed, to create a class which also contains diversity of attitude and approach—arguably the only diversity that, in a business context, really matters.

Professor Gauthier believes schools should not just be selecting candidates from traditional sectors such as banking, consultancy and industry. They should also be seeking individuals who have backgrounds in areas such as political science, the creative arts, history or philosophy, which will allow them to put business decisions into a wider context.

Indeed, there does seem to be a demand for the more rounded leaders such diversity might create. A study by Mannaz, a leadership development company, suggests that, while the bully-boy chief executive of old may not have been eradicated (根除) completely, there is a definite shift in emphasis towards less tough styles of management—at least in America and Europe. Perhaps most significant, according to Mannaz, is the increasing interest large companies have in more collaborative (合作的) management models, such as those prevalent (流行的) in Scandinavia, which seek to integrate the hard and soft aspects of leadership and encourage delegated responsibility and accountability.

小题1:What characterizes the business school student population of today?

A.Greater diversity.

B.Exceptional diligence.

C.Intellectual maturity.

D.Higher ambition.小题2:What is the author’s concern about current business school education?

A.It will arouse students’ unrealistic expectations.

B.It will produce business leaders of a uniform style.

C.It focuses on theory rather than on practical skills.

D.It stresses competition rather than cooperation.小题3:What aspect of diversity does Valerie Gauthier think is most important?

A.Age and educational background.

B.Attitude and approach to business.

C.Social and professional experience.

D.Ethnic origin and gender.小题4:What does Mannaz say about the current management style?

A.It is eradicating the tough aspects of management.

B.It encourages male and female executives to work side by side.

C.It adopts the bully-boy chief executive model.

D.It is shifting towards more collaborative models.