【Earth&Sky】隐藏的鲨鱼世界_英语听力练习mp3下载-自然-沪江听力酷

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【Earth&Sky】隐藏的鲨鱼世界

听力简介：

听写填空,只写填空内容,不抄全文,4个单词/词组+1个句子,不用写标号~~

People are [---1---] by sharks, but scientists still have a lot to learn about them. That's according to Washington Post science reporter Juliet Eilperin, whose new book on sharks is called Demon Fish. The book was released in June 2011. Here she is.

What's happened is there advances in technology particularly in terms of tracking, things like [---2---], radio transmission, that have allowed scientists to get a better sense of all sorts of shark behavior.

Eilperin said that, for example, scientists studying in great white sharks off the U.S. Pacific coast have been able to identify with precision how many sharks are living there and their pattern of migration to the Hawaiian islands.

What we've learned is that they have as regular migration pattern as wildebeest in Africa, that are traveling on land. [---3---] In addition we simply had no idea how many whites are out there.

Sharks have a built-in compass, called [---4---], that allows them to migrate long distances and to navigate the underwater highways of the earth oceans.

For example, hammerheads go out at night on certain patterns, find food, and then find their way back home, and they shift where they go, when [---5---] of the Earth shift.