TF阅读真题第941篇Megapode Approaches to Incubation Megapode Approaches to Incubation 题目：     The megapodes are a family of birds with unusually large legs. Alone am...

Is Panspermia Possible 题目：   In 1996,NASA scientists claimed that Allan Hills 84001 (abbreviated ALH 84001),a meteorite containing materials ejected from Mars 15 million ...

Deer Antlers and Seasonal Mating 题目：   In temperate (moderate)climates and subpolar regions (those nearer to the poles), where winters are usually long and the vegetation ...

Developing Sustainable Pesticides   题目：   Pesticides are substances used to get rid of insects or other pests. A pesticide gets a bad name if, as is usually the case,...

题目： Magma   Magma is a mixture of molten (melted)and semi-molten rock and other solids found beneath Earth's surface.Melting in Earth requires very specific conditions:the...

题目： Day Length and Reproductive Timing in Animals For many animals, producing offspring at a time of year when a maximum amount of food is available is essential. Producing yo...

TF阅读真题第696篇The Northern Long-necked Turtle

The Greek City-States: Sparta and Athens Of the hundreds of city-states that evolved during the Archaic Age, (800- 479 B.C.), Sparta and Athens stand out for their vividly contras...

The Azolla Event     During the early Eocene period, about 56 million years ago, Earth's atmosphere had high levels of carbon dioxide(CO2) which warmed the planet. But a...

The American Hospital     Few institutions have undergone as radical a transformation as the hospital has in its modern history. It is perhaps distinctive among social i...