单词：tris(hydroxymethyl)aminomethane(Tris)
单词：tris(hydroxymethyl)aminomethane(Tris) 相关文章
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冀教版高中英语必修五
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海豹Kid 英文儿歌
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单词解析速记
In other countries, women usually take the lead in cabaret. But here in Thailand many feel they are just not the right gender for the job. In Thai society, women are usually very prim and proper, this profession requires them to be outgoing, cheeky
国家地理2007年
A man found a cocoon of a butterfly. He sat and watched the butterfly for several hours as it struggled to force its body through that little hole. Then it seemed to stop making any progress. It appeared as if it had gotten as far as it could and it
我们都是有故事的人之生而为赢
Grammar Girl here. Today's topic is troublesome contractions. Guest writer Bonnie Trenga writes, This episodes about contractions. Or would it be better to say, This episode is about contractions? While were in the neighborhood, well talk about some
英语语法 Grammar Girl
THE MAKING OF A NATION - President Cleveland Uses Federal Troops to Stop Railroad Strike By Frank Beardsley Broadcast: Thursday, December 01, 2005 (MUSIC) VOICE ONE: THE MAKING OF A NATION -- a progra
The Making of a Nation
在世界流行乐坛中，北欧常常能为我们带来一些惊喜。而来自丹麦的Michael Learns To Rock（MLTR）就是其中之一，他们在九十年代风靡世界，带来抚动我们心弦的音乐--斯堪的纳维亚清新气息和经典流行音乐的完美结合。没有漂亮迷人的外表，没有铺天盖地的宣传，没有引人遐
音乐咖啡厅
A first grade teacher was having trouble with one ofher students. One day she asked Johnny what his problem was. He replied, I'm too smart for the first grade, my sister is in the third grade and I'm smarter than her . The teacher took him to the pri
趣味英语
This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. In 1953 a student named Stanley Miller did an experiment showing that the simple chemicals present on the early Earth could give rise to the basic buildi
Scientific American(十)月
Low-cost airlines have changed the travel business. Carriers like Southwest and Jetblue serve fewer cities than traditional airlines and offer fewer perks to passengers. They force the bigger carriers like United and Delta to change their business pr
2005年NPR美国国家公共电台
THISISAMERICA-AmericaandtheStruggleforJobs FAITH LAPIDUS: Welcome to THIS IS AMERICA in VOA Special English. Im Faith Lapidus. DOUG JOHNSON: And Im Dough Johnson. This week on our program, we look at the job situation in the United States. There was
2011年VOA慢速英语(九)月
This is the VOA Special English Economics Report. This year's Consumer Electronics Show opened Thursday in Las Vegas. The event is the world's biggest technology trade show. More than three hundred companies are presenting more than twenty thousand n
2010年慢速英语(一)月
CANBERRA, Oct. 14 (Xinhua) -- The Australian dollar hit a 28 year high as it edged closer to parity with the U.S. dollar, rising to a new post-float record of 99.70 U.S. cents on Thursday morning. At 11:15am (AEDT) on Thursday, the local unit was tra
英语新闻
URUMQI, Feb. 14 (Xinhua) -- A total of 168 tourists were rescued early Thursday after being stranded by high winds for 12 hours in northwest China's Xinjiang Uygur Autonomous Region, rescuers said. The tourists were traveling by car and bus on a prov
英语新闻
MELBOURNE, Jan. 12 (Xinhua) -- Should Djokovic lift the Norman Brookes Challenge Cup in two weeks' time, not only will he remain No. 1, he will also become the first player in the Open era to win three consecutive Australian Open titles. From my pers
英语新闻
HAVANA, Jan. 2 (Xinhua) -- The Australian swimmer Chloe McCardel announced her intentions to swim across the Florida Straits without the protection of an anti-shark cage, Cuban media highlighted here Wednesday. According to Radio Havana Cuba, McCarde
英语新闻
BEIJING, June 29 (Xinhua) -- China's government procurement amounted to 1.13 trillion yuan (179.37 billion U.S. dollars) in 2011, or 11 percent of the country's fiscal expenditure, the Ministry of Finance announced on Friday. The figure showed a huge
英语新闻
19 The Rise Of Life 第十九章 生命的起源 In 1953, Stanley Miller, a graduate student at the University of Chicago, took two flasksone containing a little water to represent a primeval ocean, 1953年，芝加哥大学的研究生斯坦利米勒拿
万物简史
破擦音[tr] 发音要领: [tr]是清辅音一一舌位：先做好发[t]的口形准备，然后将舌尖轻抵在上齿龈上发[t]音，并迅速将舌尖滑到[r]的部位上；声带：不振动。 技巧提示： [tr]的发音与汉语拼音ch
英语国际音标