091. The confusion and congestion of individual citizens looking for their letters was itself enough to discou... [查看全文]
081. These writers, who can genuinely be said to have created a genre, the "railroad novel," are now mostly... [查看全文]
071. The external surfaces of plants, in addition to being covered by an epidermis and a waxy cuticle, often... [查看全文]
061. If observations confirm the scientists' predictions, the theory is supported. The word "supported" is... [查看全文]
051. A folk culture is small, isolated, cohesive, conservative, nearly self-sufficient group that is homogeneous... [查看全文]
041. The Earth comprises three principal layers: the dense, iron-rich core, the mantle made of silicate rocks... [查看全文]
031. The quality of preservation is outstanding, but what is even more impressive is the number of ichthyosau... [查看全文]
021. But in many cases consumers are misled if they believe organic foods can maintain health and provide be... [查看全文]
011. The asphalt at La Brea seeps to the surface, especially in the summer, and forms shallow puddles that ... [查看全文]
Most of these leaders were involved in public life as reformers, activists working for women's right to v... [查看全文]