第61章 Lesson 61: Is Pluto a Planet?
- 跟美國學生同步練閱讀：Smart Reading（英文原版 Grade 6）
- (加)韋恩·埃弗里特
- 352字
- 2016-12-27 15:19:51
Many people are saying that Pluto is no longer a planet. Are they right? There's debate in the scientific world about this issue. According to the International Astronomical Union, a full-fledged plan...
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