标签：catalyst 相关文章
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用Mp3背六级单词
AS IT IS 2015-07-30 North Korea: 'No Interest at All' in Nuclear Deal A North Korean official says his country will not negotiate with other countries about its nuclear weapons program. The (North) Korean ambassador to China said Tuesday that his cou
2015年VOA慢速英语(七)月
Instead of prizing the ideal physique, Lisa Sandin finds beauty in something less than perfect. She believes she is more than her body and more than her birth defect. I believe in mystery. I believe in family. I believe in being who I am. I believe
2007年NPR美国国家公共电台
Lesson 31 The Carnival 狂欢节 Words: carapace n. （蟹或龟等的）甲壳 carat n. (宝石重量单位)克拉 cardiac adj. 心脏的 cardinal adj. 首要的，主要的；红衣风头鸟（一种美洲鸟，雄性有深红色羽毛） cargo n. 船货，货物 caricature n. （滑稽模仿的）讽刺画 carna
胡敏托福词汇记单词
alkali碱 alloy结合体 aluminum铝 ajar半开的 bleach漂白 catalyst催化剂 compound化合物 crystal水晶 combustible易燃的 distill提炼 electrician电工 erase抹掉 flask烧瓶 fuse融合 hydrogen氢气 insulate隔热 intrinsic内在的
80天攻克雅思核心词汇
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
By Naomi Schwarz Dakar 31 October 2007 The Economic Community of Central African States has named Democratic Republic of Congo President Joseph Kabila to be its next head. Analysts say Mr. Kabila, who has been accused of human rights abuses and corru
2007年VOA常速英语（十月）
Engineered devices are all around us. From cell phones and computers to hybrid cars and deep-water oil platforms, advances in engineering are profoundly changing our lives. But concerns are growing that public understanding of how these technologies
VOA标准英语2010年(七)月
New clashes between police and demonstrators erupted Wednesday in the Tunisian capital of Tunis, after sporadic disturbances overnight. The new wave of unrest took place just hours after Prime Minister Mohamed Ghannouchi announced that the country's
VOA标准英语2011年(一月)
Delegates to conference express support for idea of reintegrating Taliban militants into society, but analysts say plan will be tough sell in region Sean Maroney | Islamabad 28 January 2010 Afghan President Hamid Karzai makes a speech during the Open
VOA标准英语2010年(一月)
A Pakistani boy shouts to attract attention from a man handing out relief goods at a camp flood victims in Muzaffargarh, Punjab province, Pakistan, 18 Aug 2010 Secretary of State Hillary Clinton will announce another increase in U.S. flood aid to Pak
VOA标准英语2010年(八)月
Greek Protests Grow Over Closure of State Broadcaster An emotional farewell to colleagues in the newsroom of Greek state broadcaster ERT Tuesday night. Then, as the newsreader began a live interview, the channel was pulled from the airwaves. Some 2,7
VOA标准英语2013年(六月)
ECONOMICS REPORT - Hewlett-Packard Ousts 'Most Powerful Woman in Business' By Mario Ritter Broadcast: Friday, February 18, 2005 I'm Gwen Outen with the VOA Special English Economics Report. AP Photo W
健康与经济
RACHEL MARTIN, HOST: Now a legal dispute over the death penalty in Florida that's turned into a political standoff. The Florida Supreme Court must decide whether Governor Rick Scott has the authority to remove cases from a state attorney who refuses
2017年NPR美国国家公共电台5月
By Gergely, Valer Moscow and Washington 14 March 2007 watch Gergely report Space tourism is no longer science fiction, at least for those who can afford it. Private companies around the world are now competing to become leaders in commercial space a
2007年VOA标准英语（三月）
Ukraine's acting president Oleksandr Tuchynov has lashed out at Russia and separatist groups in the East of Ukraine. He spoke at the start of a roundtable dialogue as part of an initiative of the organization for security and cooperation in Europe. T
CCTV9英语新闻2014年05月
By Jeffrey Young Washington 03 November 2009 US diplomats held captive by Iranian militants November 4 is the 30th anniversary of the siezure, by young Iranian militants, of the U.S. embassy in Tehran. Leading up to that event, the Ayatollah Ruholla
VOA标准英语2009年(十一月)
China's first global import expo, to be held later this year, is expected to offer unprecedented opportunities for Australian businesses to tap the Chinese market. A series of business forums have been held recently in major Australian cities to prom
2018CRI中国国际广播电台
With Sudan's referendum on independence approaching, a coalition of economic and security groups are warning that renewed violence could cost as much as $100 billion. There are less than 50 days left before southern Sudan holds a critical referendum
VOA标准英语2010年(十一)月
By Richard Green Washington 05 November 2009 New York Yankees' Derek Jeter, left, and Mariano Rivera look at championship trophy after winning Major League Baseball World Series, 4 Nov 2009 The New York Yankees defeated the visiting Philadelphia Phi
VOA标准英语2009年(十一月)