新概念英语第四册Lesson 7 Bats

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

新概念英语85年上外美音版第四册第9课

Lesson 9 Curiosities of Animal Life 动物生活趣闻 Not all sounds made by animals serve as language, and we have only to turn to that extraordinary discovery of echo-location in bats to see a case in which the voice plays a strictly utilitarian r

发表于:2018-12-24 / 阅读(89) / 评论(0)

新概念英语85年上外美音版

牛津少儿英语 let's chant 51 - Big Box, Little Box (solo) - 29 s.

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发表于:2019-01-28 / 阅读(75) / 评论(0)

Let's chant Let's sing

牛津少儿英语 let's chant 52 - Big Box, Little Box (group) - 25 s.

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发表于:2019-01-28 / 阅读(81) / 评论(0)

Let's chant Let's sing

THIS IS AMERICA - Glen Echo Park

THIS IS AMERICA - Glen Echo Park By Jerilyn Watson Broadcast: Monday, June 14, 2004 (MUSIC) VOICE ONE: Welcome to THIS IS AMERICA in VOA Special English. I'm Steve Ember. VOICE TWO: And I'm Faith Lapi

发表于:2019-01-30 / 阅读(141) / 评论(0)

This is America

人生的回音The Echo

A son and his father were walking on the mountains. Suddenly, the son falls, hurts himself and screams, AAAhhhh!!!To his surprise, he hears the voice repeating, somewhere in the mountain, AAAhhhh!!! Curious, he yells, Who are you? He receives the ans

发表于:2019-02-03 / 阅读(63) / 评论(0)

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adjustment of valve tappet or plunger

aerial photograph interpretation