Let's Read and Find out Science 118本（PDF +音频）
分为两个级别
涉及内容包括：
STAGE 1:
The Human Body
Plants and Animals
The World Around Us
STAGE 2:
The Human Body
Plants and Animals
The World Around Us
Dinoasaurs
Space
Weather ande the Season
Our Earth
The World Around Us
2019-10-18 13:54 上传
2019-10-18 13:58 上传