单词：mixed metal oxide catalyst
单词：mixed metal oxide catalyst 相关文章
By Gary Garriott Broadcast: November 3, 2003 This is Steve Ember with the VOA Special English Development Report. People have been recycling metals for hundreds of years. Today, re-using metal waste o
VOA2003（下）-发展与科学
In Islamabad, Mixed Reactions to Musharraf Return On the streets of Pakistan's capital, reactions to former military president Pervez Musharraf's return to the country's political scene are mixed. For residents like Azim Ehsan Qazi, the possibility t
VOA标准英语2013年(四月)
我姐姐刚在一个高尚社区买了房子，那里住的都是医生、律师这一类的高薪单身贵族，跟我住的地方截然不同。我们这里有单身汉、有年轻父母、有双职工、也有不上班的专职妈妈;有白领，也
美国习惯用语
Grammar Girl here. Today's topic is mixed metaphors. Politicians often provide good fodder for language commentary, and one of Barack Obama's comments during the debates has been rattling around in my head for a while now. He made a comment that some
英语语法 Grammar Girl
One main goal in the renewable energy field is to find an efficient, inexpensive way to split water into hydrogen and oxygen. The hydrogen could then be used as a fuel source for vehicles or fuel cells. Typically, an electric current breaks the water
60秒科学
Libyan Conflict Brings Out Mixed Emotions in Rebel Hub Rebels in Libya continue to battle forces loyal to leader Moammar Gadhafi for control of the country. Many in the rebel hub of Benghazi have mixed emotions about the conflict. Scott Bobb reports
VOA标准英语2011年(四月)
By Roger Hsu Mephis, Tennessee 17 August 2006 watch Museum report The National Ornamental Metal Museum in Memphis is devoted to the conservation and advancement of metalwork. It is a place where metal smiths become synonymous with artists and where
2006年VOA标准英语（八月）
One main goal in the renewable energy field is to find an efficient, inexpensive way to split water into hydrogen and oxygen. The hydrogen could then be used as a fuel source for vehicles or fuel cells. Typically, an electric current breaks the water
Scientific American(四)月
[全屏观看] 点击右键- 另存为 可保存这个Flash影片 Description: Metal Sonic is flying through space and comes to an asteroid field, you need to help him blast his way through without getting hit or its game over. Instructions: Move: Up
Daily Free Games
Staying with the precious metal, and Chinas largest gold company says the country will surpass India to become the top consumer of gold in the world. In the first three quarters of this year, China produced 284 tons of the yellow metal, a nine percen
英语演讲
At least seven million Americans identify themselves as belonging to more than one race, and interest is rapidly growing in issues of multi-racial identity. In his new book, Mixed, writer and artist Kip Fulbeck presents a collection of portraits cele
VOA标准英语2010年(五)月
Kid Rock describes his latest album, Born Free, as organic blues-based rock and roll. Born Free is Kid Rock's first new album in more than three years. He left the comforts of his home studio in Detroit, Michigan to record the collection in Los Angel
VOA标准英语2011年(一月)
It's been 10 years now since the attacks on September 11, 2001 that killed thousands in America. For families and friends of those killed, the pain is still raw. However, the tragedy has proved a catalyst for one organization to rise out of the rubbl
世界各地新闻集锦
By Jim Teeple Jerusalem/Ramallah 28 November 2007 There has been a mixed reaction in Israel and the Palestinian territories to the Annapolis Mideast peace conference. VOA's Jim Teeple spoke with Palestinians in the West Bank city of Ramallah, and wit
VOA常速英语2007年（十一月）
By Barry Wood Washington 20 February 2008 The International Monetary Fund Wednesday gave Afghanistan a mixed economic report card, saying the country's overall reforms are on track but corruption and a dramatic rise in opium production pose significa
VOA常速英语2008年（二月）
Lesson 13 THE METAL CALLED IRON 第十三课 一种叫铁的金属 Iron is the most useful of all metals. Hammers, nails, grates, horse-shoes, railings, bridges, and many other things are made of iron. 在所有金属里面, 铁是最有用的一种。
英国学生科学读本
Researchers from Xian Jiaotong University in Northwest Chinas Shaanxi Province have developed a way to eliminate air pollutants during the coal-burning process, which they hope would significantly address the countrys smog problems. 来自中国西北的
英语新闻
电脑英语--常见硬件篇CPU：Central Processing Unit，中央处理单元，又叫中央处理器或微处理器，被喻为电脑的心脏。 RAM：Random Access Memory，随机存储器，即人们常说的内存。 ROM：Read－Only Memory，只
天天商务口语
The World Health Organization, upgrading a previous warning, said June 12 that diesel exhaust causes cancer and called for tighter emissions standards, comparing the risk of exhaust to second-hand cigarette smoke. Tuesdays announcement comes after in
英语新闻
The Cleaning Power of Soft Drinks! 饮料的神奇清洁能力 Lets begin with a cleaning tip: If you have some tarnished or corroded brass that you want to clean, an old brass candlestick for example, you can use Coca-Cola, or any other cola soft dr
英语听力文摘 English Digest