Glacier National park in Montana shares boundaries with Canada, an American Indian reservation, and a national forest. Along the North Fork of the Flathead River, the park also borders about 17,000 acres of private lands that are currently...
伦敦奥运会英语应该是目前托福考生最关注的时事英语之一，无论是托福口语，还是托福写作中，我们都可以把伦敦奥运会英语熟练的融入其中，充实内容。 北京时间7月31日凌晨，在伦...
Jazz has been called "the art of expression set to music", and "America's great contribution to music". It has functioned as popular art and enjoyed periods of fairly widespread public response, in the "jazz age" of the 1920s, in the "swing...
一篇托福阅读文章，哪些方面是我们值得分析的呢?本文中，我们以一篇阅读文章为例，提取它的难词，难句，复杂的文章结构，说明我们应该从阅读文章中获得些什么资源。提炼一个文...
What is p53 ? After the identification of the p53 protein and the subsequent cloning of p53 genes from several species, early observations suggested that p53 may function as an oncogene, because overexpression of p53 appeared to cause oncog...
According to some scientists, migratory birds should be able to withstand the winter. A bird's feathery coat is good insulation against the cold. BECause a bird is warm- blooded, its body temperature always remains constant, even if the tem...
一、利用上下文线索猜测词义 1、根据同义、反义关系猜词 Today' s teenagers seem to be more liberal in their ideas than their _______ grandparents. A. freethinking B. traditional C. old D. happy traditional与liberal意思...
About 纳米材料及其应用 纳米技术在生物工程上的应用 众所周知，分子是保持物质化学性质不变的最小单位。生物分子是很好的信息处理材料，每一个生物大分子本身就是一个微型处理...
第一步：花两三分钟时间扫描每篇托福阅读文章头一两个句子，定位文章难易程度。虽然平均每篇文章做题时间为11分钟，但是有的文章七八分钟便可以轻松对付，有的文章则需要15分钟...
There were two widely divergent influences on the early development of statistical methods. Statistics had a mother who was dedicated to keeping orderly records of governmental units (state and statistics come from the same Latin root, stat...
About 纳米材料及其应用 纳米技术在生物工程上的应用 众所周知，分子是保持物质化学性质不变的最小单位。生物分子是很好的信息处理材料，每一个生物大分子本身就是一个微型处理...
一篇托福阅读文章，哪些方面是我们值得分析的呢?本文中，我们以一篇阅读文章为例，提取它的难词，难句，复杂的文章结构，说明我们应该从阅读文章中获得些什么资源。提炼一个文...
Backgrounds of washington Map of Federal City, 1797 Historical Society of Washington, DC The plan of the city of Washington was designed in 1791 by Pierre L'Enfant, and mapped the following year; a design which remains largely in place. For...
一、带-ing词尾的介词 barring：except，not including除....外 concerning：about，regarding论及，关于 excepting=except failing：in default of因缺少...;在缺少。..时 following：after in time;as a sequel to在....以后...
睡与梦( dream and sleep) 梦是生活中难解之谜，自古以来引起各种各样的解释和猜想。释梦几乎是精神分析医生及占卜者所独有。笔者就近期对脑电波、香味、音乐与气功的研究科学观点出...
鹦鹉螺(中文版) 鹦鹉螺属于头足纲中的四鳃类。古老的头足类也都像鹦鹉螺一样，有不同形状的贝壳。但到现在它们大都已经灭绝，唯一剩下的只有在海底生活的鹦鹉螺了，所以鹦鹉螺...
在托福阅读备考过程中，词汇、语法、背景知识、阅读速度四方面的训练是非常必要的。青年人网为您分析托福阅读这四个方面的训练。 托福阅读训练一：词汇 与旧托福相比，新托福...
About nautilus and king nautilus By 1986, Saunders and I had collected tissue from nautiluses around Fiji, Samoa, Australia, New Guinea, the Philippines, Palau, and New Caledonia. Two independent sequencings of their genes yielded the same...
梦的背景知识 1953年，美国芝加哥大学，柯立行曼教授和他的研究生阿赛斯基(Rleitman Aserinsk)正在用脑电波测量的方法研究睡眠，阿赛斯基负责观察被试----是一些婴儿----睡眠时的脑电图...
海水发电 硕大无比的天然热库，辽阔的海洋既是一个硕大无比的“储热库”，它大量地吸收着太阳能;同时它又是一台极其巨大的“调温机”，随时都在调节着海洋的表面和深层的水温...
