GRE Reading Comprehension: JiJing 352-GRE阅读机经352篇 - S_B311OF721DDZG7J

It can be inferred from the passage that in sediment cores from the North Atlantic's deep waters, the portions that correspond to the Little Ice Age A. differ very little in composition from the portions that correspond to the Medieval Warm Period. B. fluctuate significantly in composition between the portions corresponding to the 1300s and the portions corresponding to the 1700s. C. would be likely to contain a proportion of red-stained grains closer to 17 percent than to 5percent. D. show a much higher proportion of red-stained grains in cores extracted from the far north of the North Atlantic than in cores extracted from further south. E. were formed in part as result of Gulf Stream waters having been pulled northward.