艾滋病感染得到控制(2)
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北美殖民时期的妇女
北殖民时期的妇女Women in Colonial North America The status of women in colonial North America has been well studied and described and can be briefly summarized. Throughout the colonial period t
社会:医学家呼吁关注年轻人的死因
社会:医学家呼吁关注年轻人的死因An international team of doctors and scientists is calling for more focus on the causes of death among young people around the world, age between 10 and 24, saying...
揭秘植物的修枝(2)
揭秘植物的修枝(2)Hints:Ottoline Leyser University of York Think of a major road crowded with traffic. So many cars are on the main road that the cars on the side roads cannot enter. The stem is...
艾滋病感染得到控制(1)
联合国官方称,现有感染艾滋病病毒的人比他们预期的要少...United Nations officials now say fewer people than they thought are infected with the virus that causes AIDS. Last year, the agency known as...