氯量滴定法

VOA慢速英语2010年-Christmas 2010 in America: Three Stori

FAITH LAPIDUS: Welcome to THIS IS AMERICA in VOA Special English. Im Faith Lapidus. This week on our program we hear from some Americans about Christmas past, present and future. (MUSIC) FAITH LAPIDUS: Jeffrey Davis remembers Christmas two years ago

发表于:2018-12-01 / 阅读(140) / 评论(0)

2010年VOA慢速英语(十二)月

英语听力：自然百科 Baby Gorilla 人类抚养的大猩猩

At the Cheyenne Mountain Zoo, an infant gorilla named Wumundi gets some tender loving care from a dedicated keeper and lots of attention from curious visitors. He is on with a keeper all the time 24 hours a day. Zoo spokesman Sean Anglum explains tha

发表于:2018-12-03 / 阅读(122) / 评论(0)

自然百科2008年

实用英语综合教程第三册-8

UNIT 8 Text A PRE-READING TASK Exercise 1 Before reading the passage, try to answer the questions. 1. How many years do you think it takes to double the world population now? 2. What might be the poss

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实用英语综合教程

名人演讲 "The Great Silent Majority"

Good evening, my fellow Americans. Tonight I want to talk to you on a subject of deep concern to all Americans and to many people in all parts of the world, the war in Vietnam. I believe that one of the reasons for the deep division about Vietnam is

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名人演讲

Jonathan Drori:存蓄数十亿种子的原因

在TED U 2009的这个简短的演讲中，Jonathan Drori鼓励我们保护生物多样性 -- 从一颗颗种子做起。他提醒我们要保护人类赖以生存的植物，同时他也给大家描述了千年种子库这样一个美好的远景，在

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TED公开课:生态谜云

外贸英语之外贸业务常用报价英语

1、报实价 This is to confirm uour telex of 6 April1997,asking us to make you firm offers for rice and soybeans Cf singapore.We telexed you this morning offering you 300 metric tons of一步polished rice at A$2,400 per metric ton ,cf singapore,for

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天天商务口语

Cowgirl1 Hall of Fame / Transylvania/ The Jewels and the Ori

Broadcast: April 18, 2003 By Nancy Steinbach and Shelley Gollust This is Doug Johnson. On our program today, we play some doo-wop music... answer a listener's question about places in the United State

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VOA2003（上）-社会广角

2007年VOA标准英语-Former Russian President Boris Yeltsin Dies of

By Lisa McAdams Moscow 23 April 2007 Russian President Boris Yeltsin waves as he arrives at Helsinki airport (File photo - 20 Mar 1997) Russia's first freely elected president, Boris Yeltsin, has died of heart failure at the age of 76. VOA's Lisa Mca

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2007年VOA标准英语（四月）

VOA标准英语 Accused Mumbai Terrorist Finally Finds Lawyer

The sole surviving gunman suspected of participating last year's terrorist attack in Mumbai has been having difficulty keeping a lawyer. His latest court-appointed counsel had threatened to quit after angry demonstrators surrounded her home. But the

发表于:2019-01-13 / 阅读(104) / 评论(0)

VOA标准英语2009年(四月)

报盘范文

(a.) Dear Mr. Jones: We thank you for your letter dated April 8 inquiring about our leather handbags. As requested, we take pleasure in offering you, subject to our final confirmation, 300 dozen deerskin handbags style No.MS190 at $124.00 per dozen C

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天天商务口语

经济学人156:滴定进食

Science and technology 科学技术 Animal behaviour 动物行为 Drip-feeding 滴定进食 Ecology raids the techniques of chemistry 生态学里应用上了化学技术。 Time to change restaurant 该换家馆子了。 BIOLOGISTS are sometimes acc

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经济学人科技系列

经济学人123:生态学里应用上了化学技术

Science and Technology Animal behaviour Drip-feeding 科技动物行为滴定进食 Ecology raids the techniques of chemistry 生态学里应用上了化学技术。 BIOLOGISTS are sometimes accused of physics envyand there is truth in this accusat

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经济学人科技系列

经济学人122:动物行为滴定进食

发表于:2019-01-26 / 阅读(112) / 评论(0)

经济学人科技系列

万物简史第78期:事物的测定(26)

Delicacy was the key word. Not a whisper of disturbance could be allowed into the room containing the apparatus, so Cavendish took up a position in an adjoining room and made his observations with a telescope aimed through a peephole. The work was in

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万物简史

Tree Nuts

Broadcast: May 6, 2003 By Mario Ritter This is the VOA Special English Agriculture Report. Nuts that grow on trees are an important part of the diet in many cultures. They also provide an important ex

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VOA2003（上）-社会广角

2007年VOA标准英语-New Majority in a New Congress

By Peter Fedynsky Washington, DC 04 January 2007 watch New Congress report The new, 110th session of the U.S. Congress opens today with Democrats enjoying majority status in both houses for the first time in 12 years. But whether they can translate

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2007年VOA标准英语（一月）

2007年VOA标准英语-Astronomers Search for Origin of What Cannot be

By Jessica Berman Washington 14 September 2007 Scientists have known for some time that most of the stuff in the Universe is so-called dark matter, material that cannot be seen directly because it does not interact with light. That makes it very diff

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2007年VOA标准英语（九月）

China reviews anti-dumping measures on Japanese chloroprene rubber

BEIJING, Aug. 8 (Xinhua) -- China on Wednesday started to review anti-dumping measures it imposed on chloroprene rubber imported from a Japanese company, the Ministry of Commerce said. The move came after the ministry received complaints that Japan E

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英语新闻

VOA标准英语2010年-California Company's 'Green' Cement Ca

Cement is a major component of concrete, the world's most widely used man-made material, an integral part of roads, bridges and buildings. But making cement requires heating limestone and other materials to very high temperatures, a process that rele

发表于:2019-02-08 / 阅读(185) / 评论(0)

VOA标准英语2010年(一月)

WADA confirm USADA's action on Armstrong "approriate"

WADA confirm USADA's action on Armstrong approriate BEIJING, Oct. 12 (Xinhua) -- World Anti-Doping Agency has again thrown its support behind USADA after a lengthy report with evidence to prove Lance Armstrong a doper. U.S. Anti-Doping Agency issued

发表于:2019-02-13 / 阅读(122) / 评论(0)

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adverse rising of stomach qi

analog modulation system