The passage gives a general description of ancient climate history. Scientists can figure out where glaciers have been in the p

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问题 The passage gives a general description of ancient climate history.
Scientists can figure out where glaciers have been in the past through ______.

选项

答案sediment layering

解析 Scientists can figure out where glaciers have been in the past through______.词汇线索是where,glaciers和past,定位到小标题Sediment Analysis段落次句,则答案应是sediment layering。
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