14、ever, in comparison to planting trees and building parks, the above two measures enjoy less popularity among the residents of the community and thus are unlikely to be implemented. The underlying reason is that growing trees and constructing parks can create a more comfortable living environment whi 。

15、le the other two choices can bring about more inconvenience. To be more specific, if shops stop the use of plastic shopping bags, the customers have to take a cloth bag while shopping. Also, taking public transportation will take longer time than driving the private cars, which means that commuters。

16、have to get up much earlier than before. It is self-evident that whether a policy can be carried out directly determines its effect, which is especially true of the above situation. Taking what has been discussed above, we can draw the conclusion that the most effective way of protecting environment 。

17、 in local communities is to plant trees and create parks. 托福独立写作模板：Television Television Television-the most pervasive and persuasive of modern technologies, marked by rapid change and growth-is moving into a new era, an era of extraordinary sophistication and versatility, which promises to reshape。

18、our lives and our world. It is an electronic revolution of sorts, made possible by the marriage of television and computer technologies. The word television, derived from its Greek (tele: distant) and Latin (visio: sight) roots, can literally be interpreted as sight from a distance. Very simply put, 。

19、 it works in this way: through a sophisticated system of electronics, television provides the capability of converting an image (focused on a special photoconductive plate within a camera) into electronic impulses, which can be sent through a wire or cable. These impulses, when fed into a receiver ( 。

20、television set), can then be electronically reconstituted into that same image. Television is more than just an electronic system, however. It is a means of expression, as well as a vehicle for communication, and as such becomes a powerful tool for reaching other human beings. The field of televisio 。

21、n can be divided into two categories determined by its means of transmission. First, there is broadcast television, which reaches the masses through broad-based airwave transmission of television signals. Second, there is nonbroadcast television, which provides for the needs of individuals or specif 。

22、ic interest groups through controlled transmission techniques. Traditionally, television has been a medium of the masses. We are most familiar with broadcast television because it has been with us for about thirty-seven years in a form similar to what exists today. During those years, it has been co 。

23、ntrolled, for the most part, by the broadcast networks, ABC, NBC, and CBS, who have been the major purveyors of news, information, and entertainment. These giants of broadcasting have actually shaped not only television but our perception of it as well. We have come to look upon the picture tube as。

24、a source of entertainment, placing our role in this dynamic medium as the passive viewer. 托福独立写作模板：Skyscrapers and Environment Skyscrapers and Environment In the late 1960s, many people in North America turned their attention to environmental problems, and new steel-and-glass skyscrapers were widely 。

25、 criticized. Ecologists pointed out that a cluster of tall buildings in a city often overburdens public transportation and parking lot capacities. Skyscrapers are also lavish consumers, and wasters, of electric power. In one recent year, the addition of 17 million square feet of skyscraper office sp 。

26、ace in New York City raised the peak daily demand for electricity by 120, 000 kilowatts-enough to supply the entire city of Albany, New York, for a day. Glass-walled skyscrapers can be especially wasteful. The heat loss (or gain)through a wall of half-inch plate glass is more than ten times that thr 。

27、ough a typical masonry wall filled with insulation board. To lessen the strain on heating and air-conditioning equipment, builders of skyscrapers have begun to use double-glazed panels of glass, and reflective glasses coated with silver or gold mirror films that reduce glare as well as heat gain. Ho 。

28、wever, mirror-walled skyscrapers raise the temperature of the surrounding air and affect neighboring buildings. Skyscrapers put a severe strain on a citys sanitation facilities, too. If fully occupied, the two World Trade Center towers in New York City would alone generate 2.25 million gallons of ra 。

29、w sewage each year-as much as a city the size of Stanford, Connecticut , which has a population of more than 109, 000. 托福独立写作模板：有些高校要求同学穿校服 Some high schools require all students to wear school uniforms. Other high schools permit students to decide what to wear to school. Which of these two school p 。

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