文章列表

• 1.英语美文背诵 Topaz
• Topaz Topaz is a hard, transparent mineral. It is a compound of aluminum, silica, and fluorine. Gem topaz is valuable. Jewelers call this variety of t...
• 2.英语美文背诵 Icebergs
• Icebergs Icebergs are among natures most spectacular creations, and yet most people have never seen one. A vague air of mystery envelops them. They co...
• 3.英语美文背诵 Plate Tectonics and Sea-floor Sprea
• Plate Tectonics and Sea-floor Spreading The theory of plate tectonics describes the motions of the lithosphere, the comparatively rigid outer layer of...
• 4.英语美文背诵 Oil Refining
• Oil Refining An important new industry, oil refining, grew after the Civil war. Crude oil, or petroleum a dark, thick ooze from the earth had been kno...
• 5.英语美文背诵 Raising Oysters
• Raising Oysters In the oysters were raised in much the same way as dirt farmers raised tomatoes- by transplanting them. First, farmers selected the oy...
• 6.英语美文背诵 Plankton
• Plankton Scattered through the seas of the world are billions of tons of small plants and animals called plankton. Most of these plants and animals ar...
• 7.英语美文背诵 Botany
• Botany Botany, the study of plants, occupies a peculiar position in the history of human knowledge. For many thousands of years it was the one field o...
• 8.英语美文背诵 British Columbia
• British Columbia British Columbia is the third largest Canadian provinces, both in area and population. It is nearly 1.5 times as large as Texas, and ...
• 9.英语美文背诵 The origin of Refrigerators
• The origin of Refrigerators By the mid-nineteenth century, the term icebox had entered the American language, but ice was still only beginning to affe...
• 10.英语美文背诵 Telecommuting
• Telecommuting Telecommuting-- substituting the computer for the trip to the job ----has been hailed as a solution to all kinds of problems related to ...