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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924篇Making the Most of Dark Nights
Making the Most of Dark Nights The main breeding station of the marine bird known as the swallow-tailed gull is the Galápagos Islands, which straddle...
TF阅读真题第956篇Archaeoptertx and Flight
Archaeoptertx and Flight 题目： It is not known whether Archaeopteryx, the earliest birdlike creature for which fossils have been found, could fly-but it probably did, at ...
TF阅读真题第742篇Measuring Climate Change on Mountains
Climate change has been linked to greenhouse gases in Earth's atmosphere that allow sunlight to reach the planet's surface while trapping the infrared energy that it emits...
TF阅读真题第797篇The Australlan Megatauna Extinctions
The Australlan Megatauna Extinctions Many of the species of large animals(megafauna) such as mammoths, mastodons, ground sloths, and giant deer that roamed the Earth tens of thous...
