新概念英语第四册第29课:The hovercraft
Lesson 29 The hovercraft气垫船First listen and then answer the following question.听录音，然后回答以下问题。What is a hovercraft ridi
新概念英语第四册第32课:Galileo reborn
Lesson 32 Galileo reborn伽利略的复生First listen and then answer the following question.听录音，然后回答以下问题。What has modifie
新概念英语第四册第30课:Exploring the sea-floor
Lesson 30 Exploring the sea-floor海底勘探First listen and then answer the following question.听录音，然后回答以下问题。How did peopl
新概念英语第四册第27课:The ‘Vasa’
Lesson 27 The Vasa“瓦萨”号First listen and then answer the following question.听录音，然后回答以下问题。What happened to the Vasa
新概念英语第四册第28课:Patients and doctors
Lesson 28 Patients and doctors病人与医生First listen and then answer the following question.听录音，然后回答以下问题。What are pati
新概念英语第四册第23课:Bird flight
Lesson 23 Bird flight鸟的飞行方法First listen and then answer the following question.听录音，然后回答以下问题。What are the two ma
新概念英语第四册第24课:Beauty
Lesson 24 Beatuy美First listen and then answer the following question.听录音，然后回答以下问题。What do glimpses of beauty, either i
新概念英语第四册第22课:Knowledge and progress
Lesson 22 Knowledge and progress知识和进步First listen and then answer the following question.听录音，然后回答以下问题。In what two