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 known for hundreds of years, but little use had e
新东方优美背诵短文50篇 Unit33:Plankton浮游生物 33 Plankton浮游生物. Scattered through the seas of the world are billions of tons of small plants and animals called plankton. Most of these plants and animals are too sma
Tell me not in mournful numbers, Life is but an empty dream! For the soul is dead that slumbers And things are not what they seem.请别用哀伤的诗句对我讲； 人生呵，无非虚梦一场！ 因为沉睡的灵魂如死一般， 事物的表里并不一样。Life is real! Life is
新东方优美背诵短文50篇 Unit30:The origin of Refrigerators 30 The origin of Refrigerators By the mid-nineteenth century, the term “icebox” had entered the American language, but ice was still only be
新东方优美背诵短文50篇 Unit42:Coal-fired power plants 42.Coal-fired power plants The invention of the incandescent light bulb by Thomas A. Edison in 1879 created a demand for a cheap, readily available fuel wit
新东方优美背诵短文50篇 Unit45:The Source of Energe 45.The source of Energy A summary of the physical and chemical nature of life must begin, not on the Earth, but in the Sun; in fact, at the Sun’s very ce
Ronald Reagan: The Space Shuttle "Challenger" Tragedy Address "We'll continue our quest in space. There will be more shuttle flights...more volunteers, more civilians, more teachers in space." Ladies
John F. Kennedy: Address to the Greater Houston Ministerial Association delivered 12 September 1960 at the Rice Hotel in Houston, TX Video Stream of Address Audio mp3 of Address Audio mp3 Stream of Ad
