高二英语usinglanguagelistening内容摘要：
ENING TEXT(P42) DATING METHODS Zhou Heping has e to ask the archaeologist, Richard Leakey, how he dates the bones he finds. RL: There are two main ways: the first uses layers in the ground and the second uses the radiocarbon dating. ZH: How does the layer method work? RL: Well, many layers of soil were produced at different times. Each time people build houses and live somewhere, they make an occupation layer. Each has a different color and texture. ZH: How does that help? RL: Look at the diagram in your book. Think of your wastepaper basket. When you came into work you threw the orange skin into it. Later someone threw their empty yogurt pots into it. T。阅读剩余 0%
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