氨嘧啶

NPR美国国家公共电台 2013-07-07

from npr news in washingdon,i am nor ram.the federal aviation administration says a boening 777 crashed a short while ago when landing in san francisco airport.the asian airlines flight has come from soul south korea,a spokes man says it appears the

发表于:2018-12-17 / 阅读(92) / 评论(0)

2013年NPR美国国家公共电台7月

国家地理-2008-06-12 Lost Pyramind Found 发现新的金字塔

Egyptian archaeologists have discovered the bottom part of an unknown pyramid in the Sakkara area about 18 miles south of Cairo. NationalGeographic explorer-in-residence Dr. Zahi Hawass, the Secretary General of the Egyptian Supreme Council for Anti

发表于:2018-12-30 / 阅读(105) / 评论(0)

国家地理2008年

英语单词词根词典(4)

发表于:2019-01-03 / 阅读(78) / 评论(0)

英文语法词汇

词汇资料-英语单词词根词典（4）

发表于:2019-01-11 / 阅读(78) / 评论(0)

考研英语

2007年VOA标准英语-Russian Officials Urge West to Help Transform C

By Peter Fedynsky Moscow 22 June 2007 In 1957, the United States and Soviet Union began a series of exhibits to showcase the life and achievements of the two countries. Russia is marking the 50th anniversary of the exchanges in place of the USSR, whi

发表于:2019-01-13 / 阅读(121) / 评论(0)

2007年VOA标准英语（六月）

VOA标准英语2012--Japan Heightens Military Alert for North Korean 'Space Launch'

Japan Heightens Military Alert for North Korean 'Space Launch' It is perhaps the highest state of readiness for Japan's military since World War II. The country has deployed naval ships equipped with interceptor missiles and set up missile defenses o

发表于:2019-01-13 / 阅读(84) / 评论(0)

VOA标准英语2012年(四月)

英语听力：自然百科 Lost Pyramind Found 发现新的金字塔

Egyptian archaeologists have discovered the bottom part of an unknown pyramid in the Sakkara area about 18 miles south of Cairo. National Geographic explorer-in-residence Dr. Zahi Hawass, the Secretary General of the Egyptian Supreme Council for Anti

发表于:2019-01-22 / 阅读(110) / 评论(0)

自然百科2008年

环球英语 — 155：Laughter Yoga

Voice 1 Thank you for joining us for todays Spotlight program. Im Liz Waid. Voice 2 And Im Ryan Geertsma. Spotlight uses a special English method of broadcasting. It is easier for people to understand, no matter where in the world they live. Voice 1

发表于:2019-02-14 / 阅读(86) / 评论(0)

环球英语 Spotlight

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学英语单词

apocryphe

asexual species

Asiatic Moonseed Rhizome

auroral ray

available surplus

bagassosis

ballooning instability