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TF阅读真题第895篇Parental Care by Frogs-托您的福

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 ...
TF阅读真题第894篇Jazz-托您的福

TF阅读真题第894篇Jazz

Jazz   Jazz music, an art form original to the United States, originated in the southern city of New Orleans at the turn of the twentieth century. It combined the elements of ...
TF阅读真题第893篇Erratics and Drift-托您的福

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892篇Mars's Disappearing Atmosphere-托您的福

TF阅读真题第892篇Mars’s Disappearing Atmosphere

Mars's Disappearing Atmosphere   For about the first billion years of its life, Mars was probably a watery planet. There are signs of past water in surface features, such as d...
TF阅读真题第891篇The Early Iron Age-托您的福

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 ...
写作真题第201套(rs121)-托您的福

写作真题第201套(rs121)

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写作真题第200套(rs120)-托您的福

写作真题第200套(rs120)

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写作真题第199套(rs119)-托您的福

写作真题第199套(rs119)

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写作真题第198套(rs118)-托您的福

写作真题第198套(rs118)

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写作真题第197套(rs117)-托您的福

写作真题第197套(rs117)

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