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昨天的高科技,今天可能就是低科技。美国首都华盛顿纪念碑的顶上,是一块再便宜不过的金属铝为什么这个花了36年才完工的纪念塔用的是铝,而不是黄金,白金?原来1884年之前,把金属铝提炼出来的技术,就是当时的最新高科技,那时铝比黄金贵10倍。美国人当然要把最珍贵的金属,用到自己的国父纪念碑上。而今天,黄金比铝贵25600倍。1890年,华尔街的有钱人每天坐着4匹马拉的豪华轿车,在曼哈顿招摇过市曼哈顿的16万匹马,使繁华的纽约
Yesterday’s high-tech, today may be low-tech. On top of the memorial in Washington, the capital of the United States, it is an inexpensive aluminum metal. Why did this 36-year-old memorial tower use aluminum instead of gold and platinum? Originally, the technology of extracting metallic aluminum before 1884 , Is the latest high-tech then, when aluminum is 10 times more expensive than gold. Of course, Americans need to use the most precious metal on their own Monument to the Sun Yat-sen. Today, gold is 25,600 times more expensive than aluminum. In 1890, rich people on Wall Street sat in a four-horse-drawn limousine every day, swaggering over 160,000 horses in Manhattan in Manhattan, bringing bustling New York