单词:Iohexolum
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British Columbia is the third largest Canadian provinces, both in area and population. It is nearly 1.5 times as large as Texas, and extends 800 miles(1,280km) north from the United States border. It
Columbus Day is a special holiday all across the Americas. Countries in North, Central and South America celebrate the anniversary of Christopher Columbus's arrival in the Americas on October the 12th, 1492. In the United States, the day is called Co
Welcome to AMERICAN MOSAIC in VOA Special English. (MUSIC) Im Doug Johnson. This week on our program, we answer a question about Oprah Winfrey. We also have new music from MGMT. But first, we tell you about a new exhibit remembering some Americans wh
Autumn Leaves Show Their True Colors As days grow shorter and nights grow cooler in Boulder, Colorado, the green leaves of summer have been putting on party colors. On cottonwood trees and aspens, theyre golden yellow coins. On Mapleton Avenue, the m
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-Today we take for granted that the world is round. In the fifteenth century, however, most people believed the world was flat. They thought that monsters or a trip over the edge of the earth waited for anybody who sailed outside the limits of known