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题目材料:
In California's Mojave Desert, archaeologists found two fluted projectile points, one on the surface. one buried, both similar to classic Clovis stone points from the American Plains. They obtained a radiocarbon date of 8,470 years from material associated with the buried point, a date far more recent than the known time range for Clovis points. There are three ways of accounting for this date. First, it is possible that fluted points were in use in this region around 8,470 years ago. Second, this point may somehow have been deposited at the California site long after its creation. Third, the 8,470-year date may be wrong; a second date from the same context providing an age of 4,360 years was rejected by archaeologists as incorrect.
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以上解析由 考满分老师提供。