concept of convergence是什么意思?

the casual friday concept (星期五便装日的概念) was one of the first signs that strict dress rules for offices were starting to relax. the principle of casual fridays seems to have appeared around the 1950s. it was probably in response (回应) to the changing attitudes towards workplaces. over time, some offices have relaxed their dress rules even more by using a "business casual" dress rule.
on casual fridays, employees (员工) may wear clothes which are considered to be "business casual", meaning they still obey certain standards (标准). clothes must be clean and in good condition, with no spots. men are generally allowed to wear casual trousers and bright-colored clothes, and in some offices they may be allowed to wear button-down shirts or polo shirts, with or without a tie. women often wear neat skirts or dresses; casual trousers are common and generally allowed to wear, except in very formal workplaces.
as a general rule, extremely casual clothes, like jeans, shorts, t-shirts, *** tops, and so on, are not encouraged on casual fridays. employees are still expected to make an effort to look professional, out of respect for their offices and their customers.
many people feel that casual fridays are good for employees’mood because they encourage employees to express their individuality (个性) and feel more comfortable in the offices. others feel that business casual clothing and the concept of casual fridays don’t show respect for the workplaces. casual fridays are dealt with differently, depending on the industry and the nation. the technology industry, for example, is well known for casual clothes in general, while major financial companies still dislike casual clothes.
小题1:we can learn from the passage that ________.

a．the casual friday concept has been out of fashion

b．people were required to wear formal clothes in offices before casual fridays concept appeared

c．the casual friday concept had appeared before the 1950s

d．employees who wear formal clothes lack individuality

小题2:in general, on casual fridays, as an employee in a company you can wear ________.

a．jeans

b．*** tops

c．shorts

d．polo shirts

小题3:which of the following is true according to the passage?

a．the casual friday concept changes people’s responsibility at work.

b．button-down shirts are allowed to wear in any formal workplace.

c．in general, leading financial companies don’t prefer casual clothing.

d．the technology industry requires employees to wear formal clothing.

小题4:what does the last paragraph tell us?

a．different kinds of casual clothes.

b．the development of the casual friday concept.

c．people’s different opinions on casual fridays.

d．the rules that employees must obey in companies.

The concept of solar power satellites, or SPS, first put forward in the 1960s, is still not widely known by the general public. For example, at many public exhibitions about energy, SPS is not even mentioned. This is mainly because very little money has been spent on SPS research
There are people who claim that SPS is unrealistic － because launch costs are much too high today; or because it is too far away. So why do we believe that it is important to continue to do researches on SPS? The reason is very simple.
Humans are going to need huge amounts of electric power in coming decades. Within 50 years the world population is expected to double, while economic growth will continue around the world, especially in the poorer countries. But existing energy sources already face serious problems. They are limited; they are polluted; they are dangerous. So 50 or 100 years from now, where is our power going to come from? Nobody knows. And so we believe that new large-scale possibilities should be studied further.
We must remember that humans have some choices concerning our future. To some extent we can choose the direction in which our civilization develops. And choices that are made in the coming decades － such as the energy sources that we will or will not use, will have major, long-term meaning for human life on earth. We believe that if research continues to show that SPS is environmentally and economically attractive, SPS will open the door to a much more attractive future for human civilization than any ground-based energy source, and one that the public will support and that young people will find challenging and exciting. Furthermore energy from SPS can be readily used in developing countries, as the SPS 2000 project will show, thus aiding economic development worldwide. In addition, by creating large commercial fund for space engineering, SPS will open the frontier of space to economic development, thus creating a limitless new field for the growth of the world economy.
小题1:Which of the following may be the best title for the passage?

A．The Future Energy－ SPS	B．The Concept of SPS
C．Humans and SPS	D．Advantages of SPS

小题2:Which of the following statements about SPS is TRUE?

A．The research on SPS started in the 1960s is still not appreciated by the public.

B．The research is showing SPS can benefit environment and economy at present.

C．The energy from SPS is now being used in some developing countries.

D．The public don’t know about SPS because little time is devoted to the research.

小题3:Paragraph 3 mainly talks about ______.

A．the present serious energy problems

B．where to get energy sources in the future

C．the importance of controlling world population

D．the need to explore new energy sources

小题4:The writer’s attitude towards the research can best be summarized by the saying “______”.

A．In time of peace prepare for war

B．Put the cart before the horse

C．One man’s meat is another man’s poison

D．Easier said than done

（宁夏银川一中2008届高三年级第三次模拟考试，23）---Do you have New Concept English Ⅵin your shop?
---Yes, but no more than one copy. Would you like to take ______?
A．it B them C．some D．one