请教XDF补充第3篇(2772的63-3)

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pennybehappy

11^#

发表于 2011-2-21 03:30:46 | 只看该作者

同问第七题！

我定位的差不多就是这段（line45 那边）such as the Sea of Japan. These seas have a typical oceanic floor,except that the floor is overlaid by several kilo-meters of sediment. Their floors have probably been sinking for long periods. It seems possible that a sinking current of cooled mantle material

根据自己想象就选了个E。。。。。当时觉得B跟E都可能。反正就是拿不准。
不知道大家怎么考虑的？？？