标签：Red Hat 相关文章
图片 by Jason Marshall Its not often someone suggests that knowing some math could make you the life of the party, but thats exactly what Im going to do. Yes, a properly timed delivery of a few fun facts about the famed Fibonacci sequence just migh
数学英语
《牛津阅读树》（ OxfordReadingTree ），是英国牛津大学出版社组织多位儿童阅读教育专家 , 经过二十多年不断研究及发展而出版的阅读教材。这是一套针对以英语为母语的学龄前及小学孩子培养
牛津阅读树ORTMP3（1-11级）
秋天是我最喜欢的季节，空气清新，阳光明媚。在这美丽的季节，欢迎回到Faith口语课堂-天天学，我是Faith老师。今天的英语快乐之旅开始了。 Sandra同学提问，如何用英语表达暂时，有一个英
faith电台天天学口语
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我们都是有故事的人之生而为赢
By Phuong Tran Dakar 27 December 2006 Only days away from the end of the United Nations' Year of Deserts and Desertification, four experts discuss the challenges of translating a decade's worth of research about the degradation of land in arid areas
2006年VOA标准英语（十二月）
[00:00]T：When did you get back in town? [00:01]D：A couple of days ago. [00:03]T：You heard about Luther Coleman, didn't you? [00:05]D：Yeah. Some of the boys were passing the hat for Alva and the kids. [00:08]I've never seen the guys so worked
英美人天天都在说的4000句:跟着影视学最真实的口语
Saber-tooth died out, but another big cat survived. The puma may have been more able to adapt because its diet is more varied and includes small prey. The grizzly bear also lived through the post Ice Age changes and now thrives in North America. Once
探索与发现2013年
Downtown L.A., the ultimate modern American city, but Los Angeles skyscrapers are built over the graves of thousands of extinct Ice Age beasts. Today all we have are memorials to these vanished animals, but imagine if they had survived into the prese
探索与发现2013年
To find the answers, we need to rewind history around 14,000 years to a time when the first people set foot in North America. The continent was about to undergo a profound change, a change these new arrivals may have played a part in. Throughout the
探索与发现2013年
But even on its own, a mammoth was still highly dangerous and an attack required stealth and teamwork. One of the hunters may have acted as a decoy, distracting the animal while others surrounded it. These hunters had another trick up their sleeve. U
探索与发现2013年
The same signs appear in young male mammoth tusks, but those living in North America at the end of Ice Age laid down their stress rings three years earlier than usual. In other words, it seems that young males were leaving the herd at an earlier age.
探索与发现2013年
But there is a problem with the idea that hunting caused the mass extinction. Mammoths were not the only animals to disappear. Camels survived for millions of years in North America, but disappeared around the same time as the mammoths. Wild horses f
探索与发现2013年
...and may trace their ancestry all the way back to the first dogs to enter North America. The Carolina dogs are pack animals with a strick hierarchy topped by an alpha male. Like most wild dogs, they hunt in groups. But many of the kills they make a
探索与发现2013年
By the mid 1800s, the horse and the cowboy had come to symbolize the wild west. And of course, with the cowboys came cattle. As the bison quickly vanished from the landscape, cattle filled their place. Meanwhile increasing numbers of the tame horses
探索与发现2013年
This may look like a safari through the African savanna. In fact it's a theme park in Florida. And it allows people to experience a world outside their own. In some ways, they are visiting a land from another time. 14 thousand years ago, large parts
探索与发现2013年
Its also a prime hunting ground for red-tailed hawks. And they have the perfect nesting site right next to it. Theyd moved in on the top floor of this expensive Manhattan apartment block. It acts like a surrogate tree, supporting their large nest. Th
探索与发现2013年
But there is at least one place in Florida where the manatees benefit from humans being around. Clean, hot water released from this power plant turns a man-made inlet into a hot tub. And during winter months when sea temperatures drop below 20 degree
探索与发现2013年
Beginners. Do you love to shop? Some people are addicted to shopping; they love to go out and buy things. Others enjoy window shopping, which is safer for your wallet. I am not a big shopper; I have to love something before I am willing to buy it. Ho
英语博客 A cup of English
By Peter Fedynsky Washington, DC 01 March 2006 watch Assessment report How secure is the United States? Who and what threaten Americans, their allies and interests? These and other security-related qu
2006年VOA标准英语（三月）
You know all, this is for me, its about the music industry, I love this industry and its been very kind to me. And the fact we get here, and we get and give something back tonight is very important. And Ive visited the schools that are benefiting fro
英伦广角