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TF阅读真题第683篇The Solnhofen limestones and Archaeopteryx
TF阅读真题第683篇The Solnhofen limestones and Archaeopteryx
TF阅读真题第757篇Water and ocean life
The physical and chemical properties of water, unsurprisingly, determine much about life in the ocean. Water is dense (high mass per unit of volume), about 840 times as dense as ai...
TF阅读真题第743篇Rural Manufacture
The growing population of eighteenth-century Europe increased demand for cloth to clothe people. Urban merchants turned to rural people for additional, inexpensive labor: farming f...
TF阅读真题第764篇The Chemical Defenses of Trees
Woody plants produce a great variety of chemical compounds to provide protection against other plants, diseases, and herbivores (plant-eating animals) big and small. These chemical...
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754篇Frederick Taylor And United States Industry
By the twentieth century, making workers more “cost-efficient” had become the single most important management goal in large-scale industries. Everywhere in industrial America ma...
TF阅读真题第691篇Natufians and the Domestication of Grain
TF阅读真题第691篇Natufians and the Domestication of Grain
