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Leonardo da Vinci was born on April 15, 1452 in Italy. He is best known as an artist today. One of his famous paintings is called Mona Lisa. However, Leonardo had many other natural abilities. He was also a great inventor. Many of his inventions have become important in modern day life.

Although Leonardo hated war, he invented many different machines used for war. His most special invention was the machine gun, which was produced and used in war many years later.

      By watching the way birds fly, Leonardo tried to find out the secret of flying. Among his sketches(素描)we can see several objects. We consider them as modern flying machines.

      Leonardo spent many hours thinking about how to make good use of time. He developed ideas for labor-saving machines like cutting machines.

Leonardo was a strange man. He didn't eat any meat, which was very unusual in those times. He never published (发表) his ideas and scientific discoveries. He usually used mirror writing, which looks like writing in a mirror, starting from the right side of the page and moving to the left.

      We have very little of his work today. Leonardo finished only a few of his paintings. He left many unfinished because he thought they were not perfect. No one in his life time knew how great Leonardo was. We now believe, however, that he was one of the cleverest men the world has ever known.

填表对比巴拿马运河与苏伊士运河．

H公司是中国一著名空调企业，注重自主品牌建设提升国际竞争力是其多年来坚持追求的目标。该企业每年的研发经费达20亿元，其空调的变频控制器、DSP芯片等核心技术不断实现突破；企业已开发出400个系列、7000多个品种规格的产品。其品质超越了发达国家在节能环保、售后服务等方面严苛的技术要求；企业“对用户负责，才能对品牌负责”的营销理念，赢得了巨大的市场回报，自主品牌出口占其整体出口的30%，覆盖100多个国家；企业连续5年在美国纽约时代广场展示企业形象，宣示与全球顶尖品牌一起，服务全球消费者。

运用经济生活知识，说明H公司的做法对中国自主品牌的建设的启示。