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In the late 1960's, many people in North America turned their attention to environmental problems, and new steel-and-glass skyscrapers were widely criticized. Ecologists pointed out that a cluster of tall buildings in a city often overburdens public
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 our lives and our world. It is an e
A painter hangs his or her finished pictures on a wall, and everyone can see it. A composer writes a work, but no one can hear it until it is performed. Professional singers and players have great responsibilities, for the composer is utterly depende
If by suburb is meant an urban margin that grows more rapidly than its already developed interior, the process of suburbanization began during the emergence of the industrial city in the second quarter of the nineteenth century. Before that period th
Archaeology is a source of history, not just a bumble auxiliary discipline. Archaeological data are historical documents in their own right, not mere illustrations to written texts, Just as much as any other historian, an archaeologist studies and tr
Before the 1930's ,workers were only paid as long as they were smart [00:05.69]If they were smart enough not to be ill,they were pai [00:10.06]If they were smart enough not to by injured,they were pai [00:13.66]And if they were very smart,they would
A new device is helping computers provide great amounts of informatio [00:27.35]The device is the compact disc or C [00:43.02]It was invented several years ag [00:57.50]to replace music records made of plasti [01:13.67]A CD is played on a machine tha
Ladies and gentleme [00:08.91]we are arriving at the scenic spot now [00:26.04]and there are a few things you need to remembe [00:43.76]First,remove all valuables from the coa [01:01.49]because we can't guarantee their safet [01:17.74]Second,note the
The best way to find a book in the librar [00:16.46]is to use the card catalogu [00:27.53]The catalogue is an index of all the book [00:46.24]All the cards are filed alphabeticall [01:01.20]and storied in drawers in large cabinet [01:16.04]There are
By the mid-nineteenth century, the term icebox had entered the American language, but ice was still only beginning to affect the diet of ordinary citizens in the United States . The ice trade grew with the growth of cities. Ice was used in hotels, ta
If the salinity of ocean waters is analyzed, it is found to vary only slightly from place to place. Nevertheless, some of these small changes are important. There are three basic processes that cause a change in oceanic salinity. One of these is the
An important new industry, oil refining, grew after the Civil war. Crude oil, or petroleum a dark, thick ooze from the earth had been known for hundreds of years, but little use had ever been made of it. In the 1850 s Samuel M. Kier, a manufacturer i
In the oysters were raised in much the same way as dirt farmers raised tomatoes- by transplanting them. First, farmers selected the oyster bed, cleared the bottom of old shells and other debris, then scattered clean shells about. Next, they planted f
Telecommuting-- substituting the computer for the trip to the job ----has been hailed as a solution to all kinds of problems related to office work. For workers it promises freedom from the office, less time wasted in traffic, and help with child-car
When did sport begin? If sport is, in essence, play, the claim might be made that sport is much older than humankind, for , as we all have observed, the beasts play. Dogs and cats wrestle and play ball games. Fishes and birds dance. The apes have sim
The United States is a land of immigrant [00:20.87]The immigrants brought many different styles of food with the [00:41.74]That's why you can find almost every kind of food in Americ [01:04.89]In some case [01:13.04]Americans have adopted foods from
1. 职业的选择很重要 2. 如何明智的选择自己的职业 3. 你的职业选择。 Every individual faces the problem of choosing an occupation after graduating from university, which is of great importance in ones whole life. An appropriat
More 4G phones are expected to go on the market in 2011 as Sprint(冲刺) Nextel Corp. and Verizon Wireless plan to release their 4G phones at a cheaper price. With the expanding mobile industry, companies are releasing new products to keep up with t
阅读是四六级考试中的重头戏,考生们该怎样复习阅读呢?我们一贯强调的都是真题为主,越到最后就越需要研究真题。只有仔细总结真题阅读中的出题思路以及命题人常设的陷阱,升华以往