排序
TF阅读真题第958篇Were Dinosaurs Endothermic
Were Dinosaurs Endothermic 题目: Because dinosaurs are considered reptiles, they were for many years thought to be cold-blooded (ectothermic) like modern reptiles, requiri...
TF阅读真题第968篇Farming in Uruk
题目: Farming in Uruk The ancient city of Uruk in the southern region of Sumer in the ancient Middle East developed an agricultural system that depended on irrigation to ...
TF阅读真题第961篇Developing Sustainable Pesticides
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,...
TF阅读真题第918篇Dating Archaeological Objects
Dating Archaeological Objects For contemporary archaeologists who need to know the age of any objects they study, perhaps the most precise and yet technologically ...
TF阅读真题第947篇Magma
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...
TF阅读真题第938篇Deer and the Forests of Kinkazan
Deer and the Forests of Kinkazan 题目: The ancient beech forests of Kinkazan Island off the coast of northern Japan are in danger of disappearing. Few beech saplings (young tree...
TF阅读真题第963篇Day Length and Reproductive Timing in Animals
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932篇Igloos
Igloos In the language spoken by the Inuit-an indigenous people inhabiting the Arctic regions of Canada, Greenland, and the United States-the word 'igloo' means 'house' or '...
