全国大众英语80篇背诵阅读带翻译(七十八) Police and Communities Few institutions are more important to an urban community than its police, yet there are few subjects historians know so little abo... / 2010-06-08 / 查看 5 次

全国大众英语80篇背诵阅读带翻译(八十) Evolution and Wheels In the past, evolutionary biologists contemplating the absence of wheels in nature agreed that the explanation was not undesirability: ... / 2010-06-08 / 查看 7 次

全国大众英语80篇背诵阅读带翻译(四十五) 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 cente... / 2010-06-08 / 查看 512 次

全国大众英语80篇背诵阅读带翻译(五十九) Muscles and Human Body It is in the joints of the human body that movements of the bones take place. The movement itself is caused by the pull of sheets a... / 2010-06-08 / 查看 94 次

全国大众英语80篇背诵阅读带翻译(六十五) The Early Settlers in North America The North American frontier changed some of the characteristics of the pioneers of the 1750’s and intensified others. ... / 2010-06-08 / 查看 12 次

全国大众英语80篇背诵阅读带翻译(五十七) Lighthouses The first navigational lights in the New World were probably lanterns hung at harbor entrances. The first lighthouse was put up by the Massachu... / 2010-06-08 / 查看 475 次

全国大众英语80篇背诵阅读带翻译(七十四) The History of Chemistry Chemistry did not emerge as a science until after the scientific revolution in the seventeenth century and then only rather slowl... / 2010-06-08 / 查看 1103 次

全国大众英语80篇背诵阅读带翻译(七十二) The Satiric Literature Perhaps the most striking quality of satiric literature is its freshness,its originality of perspective. Satire rarely offers origi... / 2010-06-08 / 查看 8 次

全国大众英语测验80篇阅读带翻译汇总 全国大众英语测验80篇阅读带翻译汇总 大众英语80篇背诵阅读带翻译(一)大众英语80篇背诵阅读带翻译(二十一) 大众英语80篇背诵阅读带翻译(二)大众英语80篇背诵阅读带翻译... / 2010-06-08 / 查看 4 次

全国大众英语80篇背诵阅读带翻译(五十三) Nitinol Nitinol is one of the most extraordinary metals to be discovered this century: A IT alloy of nickel and titanium, nitinol has some perplexing prope... / 2010-06-08 / 查看 351 次