Lesson 2 Spare that spider不要伤害蜘蛛
First listen and then answer the following question.
听录音,然后回答以下问题。
How much of each year do spiders spend killing insects?
Why, you may wonder, should spid...
Lesson 43 Are there strangers in space?宇宙中有外星人吗?
First listen and then answer the following question.
听录音,然后回答以下问题。
What does the 'uniquely rational way' for us to communicate with other inte...
Lesson 44 Patterns of culture文化的模式
First listen and then answer the following question.
听录音,然后回答以下问题。
What influences us from the moment of birth?
Custom has not commonly been regarded as ...
Lesson 48 Planning a share portfolio规划股份投资
First listen and then answer the following question.
听录音,然后回答以下问题。
How does the older investor differ in his approach to investment from the younger...
Lesson 1 Finding fossil man发现化石人
First listen and then answer the following question.
听录音,然后回答以下问题。
Why are legends handed down by storytellers useful?
We can read of things that happened ...