Waking Up: Coming Out of Hibernation 1 There are animals in most temperate regions in the north that spend approximately six months in hibernation—from October to March. Within...

The Process of Domestication Domestication was not an innovation restricted to farming societies. The first of all domestic animals-the dog-was domesticated by hunter-gatherers dur...

146Wet and Dry Periods on the Great Plains讲解

第318篇Class Structures in Postwar Europe

TF阅读真题第645篇Seasonal Bird Populations

TF阅读真题第650篇Ice Age Sculpture

官方评分规则 谈到分数评估，首先是需要明确PET考试评分规则。1、总分评分简单分析下B1 Preliminary（PET）的评分。PET的最终分数是阅读、写作、听力、口语四项的平均分（这点很类似雅思）。最...

TF阅读真题第654篇Strengths of the Byzantine Empire

TF阅读真题第662篇A Transportation Transformation

第32篇Transport of Food to Rome