战火纷飞伊拉克(1)
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- 南京大学
科学60秒:满月:狮子猎食的预兆
Think humans are at the top of the food chain? Not quite, in parts of Africa. Lions have attacked over 1000 people in Tanzania in the last 20 years. Two thirds of those attacks were ___1___, and ...
词语掌故:和水有关的俚语(1/2)
Expressions about water are almost as common as water itself. But many of the expressions using water have unpleasant meanings. The expression "to be in hot water" is one of them. It is a very o...
最早的摩天楼和迪拜塔(1)
天下高楼无极限 Hints: Home Insurance Building Chicago Illinois Skyscrapers were invented in the United States. As early as the 1880s, 2 new technical developments made these taller buildings po...
DIY:手工造纸(1)
最早的造纸工业起源于大约5000年前的埃及和尼罗河谷。Hints: Nile ValleyThe earliest process of making paper was done almost 5,000 years ago in Egypt and the Nile Valley. In those days, paper was mad...