第412章 Lesson 21 Carbon Dating
- 跟美国学生同步练阅读：Smart Reading（英文原版 Grade 1-8）
- (加)韦恩·埃弗里特
- 388字
- 2017-12-29 12:36:18
Carbon dating — also called carbon 14 dating, is a process for determining the age of organic materi...
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Carbon dating — also called carbon 14 dating, is a process for determining the age of organic materi...