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2013托福考试备考：托福阅读必备背景资料（十二）的相关文章推荐

2013托福考试备考：托福阅读必备背景资料（十二）

 The loss of genes that guide the development of fins may help to explain how fish evolved into four-limbed vertebrates, according to a study. In the late Devonian period, around 365 million years ago, fish-like creatures started venturing from shallow waters onto land with the help of eight-fingered limbs. The limbs had evolved from fins; during the transition, our back-boned ancestors lost rows of rigid fibers, called actinotrichia, that provide structural support and guide fin development. The number of digits was also later winnowed t... [ 查看全文 ]
2013-03-14

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托福阅读考试备考

2013托福考试备考：托福阅读必备背景资料（十二）的相关文章

2013托福考试备考：托福阅读必备背景资料（十一）

近几天来，南非世界杯各大球场内气氛紧张，各国球队正为争取16强席位而奋力厮杀，而此时此刻我们这些远在遥远东方的球迷们除了看看比赛还能看看什么呢?趁着今天比赛还没开始，我们一起来看看关于世界杯比赛的趣闻吧。 The FIFA World Cup is an international association football competition contested by the men's ...[ 查看全文 ]
2013-03-14

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托福阅读考试备考

2013托福考试备考：托福阅读必备背景资料（十）

Biomedical engineers have built many types of human organs in the lab, but they've lagged on lung tissue--until now. Two new studies have used very different approaches to do the job. One team has ...[ 查看全文 ]
2013-03-14

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托福阅读考试备考

2013托福考试备考：托福阅读必备背景资料（九）

Dramatic event that will determine the course of the 21st century will take place in 2014, according to a Cambridge University academic. In 1517 Martin Luther nailed his theses to the door of Witten...[ 查看全文 ]
2013-03-14

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2013托福考试备考：托福阅读必备背景资料（八）

The campaign to conserve electricity in the home needs to pay more attention to consumers and not just fix on the gee-whiz technology of smart meters, a leading energy conservation advocacy organiza...[ 查看全文 ]
2013-03-14

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2013托福考试备考：托福阅读必备背景资料（七）

Over half of the world is covered with water, we need it to stay alive. When there's too much water, or water in the wrong place, it's a problem we call flooding. In the UK people are sometimes for...[ 查看全文 ]
2013-03-14

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托福阅读考试备考

2013托福考试备考：托福阅读必备背景资料（六）

We all carry our DNA around with us—in every cell of our bodies—but some biotech trailblazers are toting their genomes with them, too. In a recent talk Jay Flatley, president and CEO of sequencing g...[ 查看全文 ]
2013-03-14

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2013托福考试备考：托福阅读必备背景资料（五）

The stink of exhaust, the mind-numbing tedium of traffic, parking lots blighting central city real estate. The urban sins of the automobile are numerous indeed. As more people move to cities and ga...[ 查看全文 ]
2013-03-14

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托福阅读考试备考

2013托福考试备考：托福阅读必备背景资料（四）

Fights between couples are personal. So it makes sense that the passionate ones are rarely about the actual content but rather are typically about something else entirely. But what is the “somethin...[ 查看全文 ]
2013-03-14

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2013托福考试备考：托福阅读必备背景资料（三）

世界杯已经走过了长长80年的历史了。世界杯创造了许多有趣搞笑的记录，我们一共选出了10个世界杯历史中最搞笑的时刻。 The World Cup has the power to conjure up so many different emotions in people. Should you be asked to list them off, humour would probably ...[ 查看全文 ]
2013-03-14

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2013托福考试备考：托福阅读必备背景资料（二）

作为世界上现存最大的哺乳动物，鲸鱼的生活一直充满着挑战，每年日本渔船以科考名义的捕鲸活动都会杀死大批鲸鱼，而现在又有一个坏消息传来，据研究表明，生存环境的日益恶化也在对鲸鱼的生存构成巨大威胁。 More whales are being killed by chemical and noise pollution, entanglement in nets, climate change or...[ 查看全文 ]
2013-03-14

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