gre的机经对我们的备考有很强的参考价值，为了方便大家，下面小编给大家带来GRE阅读高频机经原文及答案：地球冷暖周期，来看看吧！
GRE阅读高频机经原文及答案：地球冷暖周期
地球冷暖周期通过石头含铁量推定 新题
Recent studies of sediment in the North Atlantic’s deepwaters reveal possible cyclical patterns in the history of Earth’s climate. Therock fragments in these sediments are too large to have been transported thereby ocean currents; they must have reached their present locations by travelingin large icebergs that floated long distances from their point of origin beforemelting.
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