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TF阅读真题第891篇The Early Iron Age
The Early Iron Age During the Bronze Age (roughly 3300-1200 B.C.E. in the Middle East), civilizations were limited in their use of iron. Most iron occurred not in ...
TF阅读真题第893篇Erratics and Drift
Erratics and Drift In the nineteenth century, scientists theorized that glaciers (ice sheets) covered much of Earth's surface during an ancient very cold period known as the...
TF阅读真题第823篇The Radiocarbon Dating of Prehistoric American Sites
TF阅读真题第823篇The Radiocarbon Dating of Prehistoric American Sites
TF阅读真题第895篇Parental Care by Frogs
Parental Care by Frogs Only an estimated 10 percent of anuran (frog and toad) species provide any kind of parental care. But within this 10 percent there is very great diversity ...
WS 100L4
听力音频： WS 100听力音频 https://mp.weixin.qq.com/s?__biz=Mzg3MTg0NDM1Ng==&mid=2247506766&idx=3&sn=8e369007dfaeabdd79f8e2382242fa44&scene=21#wechat_redirect ...
TF阅读真题第849篇Azolla and Climate in the Arctic and Europe
TF阅读真题第849篇Azolla and Climate in the Arctic and Europe
