TF阅读真题第816篇Characteristics of Seaweeds

TF阅读真题第779篇The Decline of the Large Blue Butterfly in England

  Periglacial Mounds   Periglacial regions are cold-climate areas that are located near the margins of glaciers-permanent ice sheets covering parts of the Arctic and ot...

TF阅读真题第833篇The Radiocarbon Dating of Prehistoric American Sites

The Roman Empire(31 B.C.E.-A.D. 476)， which conquered much of Europe, the Near East, and northern Africa, enjoyed great prosperity before facing economic decline in its later cent...

WS 032C2

TF阅读真题第709篇How Earth's Oceans Formed

TF阅读真题第714篇Origin of Comets

TF阅读真题第790篇Theatrical Staging

Early Food Production in Africa   Farming appeared in Africa by 5000 B.c.E. Eventually, several different styles of food production developed. These variations were caused by ...