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Lesson 7 Bats 蝙蝠 First listen and then answer the following question. 听录音，然后回答以下问题。 In what way does echo-location in bats play an utilitarian role? Not all sounds made by animals serve as language, and we have only to tu

发表于:2018-11-27 / 阅读(746) / 评论(0)

新概念英语第四册

Study Finds Huge Drop in Caribbean Coral

By Caty Weaver Broadcast: August 8, 2003 This is Bill White with the VOA Special English Environment Report. A new study shows an eighty percent decrease of hard coral in the Caribbean Sea over the pa

发表于:2018-12-01 / 阅读(89) / 评论(0)

VOA2003（下）-环境与健康

Atlas Shows Coral Reefs Shrinking Fast

By Rosanne Skirble Coral reefs are home to the greatest diversity of plant and animal life found in any habitat, anywhere on the earth. But, while they are found in 101 countries and territories, the

发表于:2019-01-03 / 阅读(58) / 评论(0)

VOA2004（下）--健康科技

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发表于:2019-01-26 / 阅读(40) / 评论(0)

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发表于:2019-01-26 / 阅读(43) / 评论(0)

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经济学人111:集体行为跟领导走

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发表于:2019-01-26 / 阅读(34) / 评论(0)

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