单词:tumourigenicity
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By David McAlary Washington 25 January 2006 When it comes to lung cancer rates among smokers, scientists say race and ethnicity matter. A new study reports significant differences in the rates among s
By Gilbert da Costa Abuja 14 October 2006 Hundreds of soldiers are on the streets of the central Nigerian city of Jos following clashes Friday between riot police and demonstrators protesting the attempted impeachment of the state governor. Witnesse
By Mil Arcega Washington, DC 13 September 2006 watch Kalamazoo Promise The promise of a free college education has brought about a remarkable economic turnaround for the U.S. Midwestern city of Kalamazoo in the state of Michigan. The city had fallen
By Nico Colombant Kaduna, Nigeria 20 April 2007 Nigeria's next president is almost certain to be a northerner, as the ruling party candidate and the two main opposition leaders for Saturday's election are from that region. But analysts say replacing
By Gilbert da Costa Abuja 23 October 2006 Tensions in Nigeria's oil-rich Niger Delta have flared in recent months as local communities accuse foreign oil companies and the government of reneging on promises to provide jobs and social amenities. Gilb
By Nico Colombant Ogoniland, Nigeria 26 May 2007 Market women share anti-oil company feelings In Nigeria's oil-rich Niger Delta, one area, Ogoniland in Rivers State, resists oil production. Residents there say oil companies refuse to meet their deman
By Gilbert da Costa Abuja 21 March 2006 Nigeria's long-delayed head count has started rather sluggishly. Gilbert da Costa reports for VOA that logistical problems could be a major challenge to what au
Learning About Farm Animals at Houston Livestock Show This is where cows get all prettied up for judging or auction. For families from farms and ranches, being around these animals is part of everyday life. But they are in the minority, says the Hous
Sri Lankan military officials say Tamil rebels carried out an aerial bombing raid in the capital of Colombo late Friday. A military spokesman said that shortly after the bombing, Sri Lanka's air force chased two rebel light aircraft and shot down on
U.N. aid agencies report the humanitarian situation in Northern Yemen is worsening. They say fighting between Yemeni government forces and al Houthi rebels is continuing to escalate and approximately 119,000 people have been displaced. Displaced Yem
BBC Learning English A True Mancunian Callum:Hello I'm Callum Robertson and welcome to this programme which we've called 'A True Mancunian'. Now, what is a Mancunian, well a Mancunian is a word for someone who comes from the city of Manchester and i
By Greg Flakus New Orleans 13 May 2006 The more than 2,000 graduates of Tulane University in New Orleans heard from not one, but two former U.S. presidents at their graduation commencement ceremony Sa
By Gilbert da Costa Abuja 20 May 2006 Two unidentified farm worker walk towards birds suspected of having bird flu virus Officials in the northern Nigerian city of Kano are investigating reports of a
By Alisha Ryu Mogadishu 02 May 2007 In the Somali capital, Mogadishu, several days of calm have allowed some African Union peacekeepers from Uganda to move out of their barracks for the first time since their arrival in March. From Mogadishu, VOA Cor
ROME, Dec. 18 (Xinhua) -- AC Milan's offer for Carlos Tevez has been rejected by Manchester City, the Serie A giant's vice president Adriano Galliani confirmed on Sunday. Tevez has agreed personal terms with Milan, but City do not want to release him
By Gilbert da Costa Abuja 15 September 2006 Nigerian oil unions say they could resume their strike, if the government fails to meet their demands. The unions suspended their strike Thursday, a day after it started. ----- A Nigerian army gunboat arri
Would you eat a ready meal from the fridge rather than cook from scratch? Have you been doing internet shopping rather than going to the stores? What cant you be bothered to do? A study into how lazy British people are has found more than half of adu
Hi there, I'm Sonali from the BBC World News for Children. Coming up: A train crash in India has killed 65 people. Brazil's footballers are set to play Tanzania and Zimbabwe. And frogs cause traffic chaos in Greece. First - at least 65 people have di
The Physics of Water Towers 水塔,一般居民区里蓄水作用,有些还是水厂生产工艺的一个重要组成部分,用于保持和调节给水管网中的水量和水压。主要由水柜、基础和连接两者的支筒或支架组成。
世界上跑得最快的是什么?答案是光速。它每秒能跑186,280英里。因为即使在太空中,光速也大致相同,所以光年也就用于描述不同星球之间的距离。记住了哦,光年是距离单位,不是时间单位