Lesson 28 Patients and doctors 病人与医生 First listen and then answer the following question. 听录 ...

小猪妖

Lesson 26 The past life of the earth 地球上的昔日生命 First listen and then answer the following qu ...

小猪妖

Lesson 25 Non-auditory effects of noise 噪音的非听觉效应 First listen and then answer the following ...

小猪妖

Lesson 29 The hovercraft 气垫船 First listen and then answer the following question. 听录音，然后回 ...

小猪妖

Lesson 27 The 'Vasa' “瓦萨”号 First listen and then answer the followin ...

小猪妖

Lesson 30 Exploring the sea-floor 海底勘探 First listen and then answer the following question. 听 ...

小猪妖

Lesson 31 The sculptor speaks 雕塑家的语言 First listen and then answer the following question. 听 ...

小猪妖

Lesson 32 Galileo reborn 伽利略的复生 First listen and then answer the following question. 听录音， ...

小猪妖

Lesson 33 Education 教育 First listen and then answer the following question. 听录音，然后回答以下 ...

小猪妖

Lesson 34 Adolescence 青春期 First listen and then answer the following question. 听录音，然后回答 ...

小猪妖

Lesson 36 The cost of government 政府的开支 First listen and then answer the following question. 听 ...

小猪妖

Lesson 35 Space odyssey 太空探索 First listen and then answer the following question. 听录音，然后 ...

小猪妖

Lesson 37 The process of ageing 衰老过程 First listen and then answer the following question. 听录 ...

小猪妖

Lesson 38 Water and the traveller 水和旅行者 First listen and then answer the following question. ...

小猪妖

Lesson 39 What every writer wants 作家之所需 First listen and then answer the following question. ...

小猪妖

Unit 1 Lesson 1 Finding fossil man 发现化石人 First listen and then answer the following question. ...

小猪妖

Lesson 2 Spare that spider 不要伤害蜘蛛 First listen and then answer the following question. 听录音 ...

小猪妖

Lesson 39 Waves 海浪 First listen and then answer the following question. 听录音，然后回答以下问题 ...

小猪妖

Lesson 4 Seeing hands 能看见东西的手 First listen and answer the following question. 听录音，然后回 ...

小猪妖

Lesson 5 Youth 青年 First listen and then answer the following question: 听录音，然后回答以 ...

小猪妖