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TF阅读真题第698篇European Cities and the Rise of Commerce
TF阅读真题第698篇European Cities and the Rise of Commerce
TF阅读真题第760篇Bird Molt
Molt is the process in which birds shed feathers and replace them by growing new ones. It is a costly effort that typically follows breeding in the warmest months of the year and p...
TF阅读真题第738篇Sauropods and Conifers
The sauropod dinosaurs were gigantic, long-necked herbivores (plant eaters) that flourished during the Jurassic period (201-145 million years ago). At the same time that the saurop...
TF阅读真题第766篇The River Nile in Ancient Egypt
The special character of the Nile, which made it central to ancient Egyptian culture, was its annual inundation (flooding). During June the river began to rise, and a quantity of g...
TF阅读真题第747篇The European Freshwater Fish Crisis
In Europe, rapid human population growth and the rise of agriculture toward the end of the first millennium had profound effects on freshwater fish, especially migratory fish like ...
TF阅读真题第699篇Transportation and American Development
TF阅读真题第699篇Transportation and American Development
