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TF阅读真题第888篇The Origin of Mars’s Moons
The Origin of Mars's Moons Mars has two tiny moons, Phobos and Deimos. The orbits of both these satellites are nearly circular and close to the planet: Phobos orbits...
TF阅读真题第859篇Food Caching by Scrub Jays
Food Caching by Scrub Jays The western scrub jay is a highly intelligent bird, and biologists have conducted a number of experiments on its cognitive abilities base...
TF阅读真题第886篇Opera in Seventeenth-Century Venice
Opera in Seventeenth-Century Venice Opera, a form of drama set to music and featuring vocal performance supported by an orchestra, was born in Italy at the very end ...
TF阅读真题第836篇Changes in Ancient Egyptian Art Production
TF阅读真题第836篇Changes in Ancient Egyptian Art Production
TF阅读真题第897篇How Fossils Map the Past
How Fossils Map the Past Only a tiny fraction of the organisms that have lived during the geologic past have been preserved as fossils.Normally the remains of an ani...
