第49章 Lesson 49 The Moon and Tides
- 跟美國學(xué)生同步練閱讀：Smart Reading（英文原版 Grade 8）
- (加)韋恩·埃弗里特
- 608字
- 2017-12-29 13:02:34
In order to understand ocean tides, we first need to travel nearly 400000 kilometres into space! That's the distance from Earth to the Moon. The Moon revolves in an orbit around the Earth and it takes...
上QQ閱讀APP看后續(xù)精彩內(nèi)容
登錄訂閱本章 >