水砂混合体

鹅妈妈童谣 03 Blow, wind, blow! And go, mill, go!

Blow, wind, blow! And go, mill, go! That the miller may grind his corn; That the baker may take it, And into rolls make it, And send us some hot in the morn.

发表于:2018-12-13 / 阅读(359) / 评论(0)

鹅妈妈童谣

SSS 2008-09-24

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Theres a Native American site in Ohio that appeared to be a fort. But recent discoveries by archaeologists at the University of Cincinnati show thats n

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SSS 2011-02-17

This is Scientific Americans 60-Second Science. Im Cynthia Graber. This will just take a minute. Usually, we trust common sense to solve problems. Is a runny mixture too thick? Add some fluid. Thatll make it runnier. Except when the fluid makes it th

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Scientific American(二)月

SSS 2010-01-26

What was around the bend in rivers hundreds of millions of years ago? Its a trick questionbecause there werent any bends. Ancient rivers were typically just wide, sheetlike flows of water. New reports in the journals Geology and Earth-Science Reviews

发表于:2018-12-24 / 阅读(133) / 评论(0)

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托福听力短文 II-03-2

(WA) One reason oceanographers analyze the sediment on the ocean floor is to see how long-terms changes in Earth's temperature have affected the depth of the ocean. By analyzing the remains of sea animals in old layers of ocean sediment, oceanograph

发表于:2018-12-30 / 阅读(102) / 评论(0)

托福听力短文

DEVELOPMENT REPORT - Do-It-Yourself: Preparing Fish for Dryi

DEVELOPMENT REPORT - Do-It-Yourself: Preparing Fish for Drying or Smoking By Bob Bowen Broadcast: Monday, November 07, 2005 I'm Steve Ember with the VOA Special English Development Report. Most of the

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农业与发展

SSS 2009-11-16

It seemed like a good ideabecause rivers and ponds in Bangladesh were contaminated with bacteria, Bangladeshis switched to wells. But soon after, in the early 80s, researchers realized those wells were harming Bangladeshis with a new poisonarsenic. T

发表于:2019-01-08 / 阅读(134) / 评论(0)

Scientific American(十一)月

VOA慢速英语 2008 1110a

This is the VOA Special English Development Report. Dye can bring a little color to life. Most clothing is colored with dyes. Modern, manufactured dyes can be costly. Natural dyes from plant and animal products have been used since ancient times. So

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VOA慢速英语2010年-Development Report - Bringing Color to

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VOA慢速英语2014 荷兰人试验在海水中种植蔬菜

Dutch Experiment Grows Vegetables in Sea Water 荷兰人试验在海水中种植蔬菜 Climate change has caused a rise in sea levels. This has increased the amount of salt in fresh water used on coastal farms. As a result farmers are increasingly un

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2014年VOA慢速英语(十一)月

VOA标准英语2012--Lake Sediment Could Better Date Ancient Finds

Lake Sediment Could Better Date Ancient Finds Radiocarbon dating is the best-known and most widely used method to determine the age of organic material, such as bone or wood or plant matter. All such material contains radioactive carbon atoms, known

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VOA标准英语2012年(十月)

英国学生科学读本第57期:硫(1)

Lesson 57 Sulphur 第57课硫 Did you ever have to take a mixture of brimstone and treacle? This mixture has not a pleasant taste, but it is a useful medicine; and if it will do us good, we should not care much whether it has a nice taste or not. 小朋

发表于:2019-01-17 / 阅读(130) / 评论(0)

英国学生科学读本

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Very quietly I take my leave As quietly as I came here; Quietly I wave good-bye To the rosy clouds in the western sky. The golden willows by the riverside Are young brides in the setting sun; Their re

发表于:2019-01-19 / 阅读(178) / 评论(0)

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DEVELOPMENT REPORT - Bringing Color to Life With Natural Dye

DEVELOPMENT REPORT - Bringing Color to Life With Natural Dyes By Jill Moss Broadcast: Monday, August 15, 2005 I'm Barbara Klein with the VOA Special English Development Report. Dye can bring a little

发表于:2019-01-30 / 阅读(161) / 评论(0)

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首先，我建议同学们不要上完辅导班就去参加考试。虽有趁热打铁之说，但是我相信绝大部分同学在上课期间已经把大部分的精力用于听讲和记笔记了，回家之后基本上就直奔安乐窝了。能够

发表于:2019-02-14 / 阅读(151) / 评论(0)

雅思英语

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Saying Good-bye to Cambridge Again --by Xu Zhimo 再别康桥徐志摩 Very quietly I take my leave As quietly as I came here; Quietly I wave good-bye To the rosy clouds in the western sky. The golden willows by the riverside Are young brides in the

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如何在托福阅读中提取句子的主干?这样即抓住了阅读的重点，也节省了阅读时间。有些同学对于分析长难句并不是那么敏感，看到句子简化题可能就会有晕头转向的感觉，在这里给大家讲解一

发表于:2019-02-18 / 阅读(108) / 评论(0)

托福英语

环球英语 — 196：The Zimbabwean Food Machine

Voice 1 Hello. Im Ruby Jones. Voice 2 And Im Marina Santee. Welcome to Spotlight. This programme uses a special English method of broadcasting. It is easier for people to understand, no matter where in the world they live. Voice 1 Maiba presses a coo

发表于:2019-02-21 / 阅读(135) / 评论(0)

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近来在所接触到的考生当中，绝大部分都是准备到海外读语言、预科或是对雅思分数要求不高的准大学留学生。在他们身上都有着一个共同的特点，那就是时间比较紧迫且对雅思分数要求并不

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4-ethyl-2-picoline

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absorbing rod,absorber rod

accroachment

agreement among underwriters

air diffusion aerator

arteriae laryngea inferior