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选修9《Warming up、Pre-reading、Reading、Comprehending》公开课PPT课件优质课下载
Arctic Ocean
Question: How many oceans are there in
the world?
Have you ever dreamed of sailing on the sea?
Zheng He
Marco Polo
Exploring oceans was always a dream for ancient people.
Look at these famous people.
What do you know about them?
Zheng He
1371-1433
He led a large fleet to explore
Southeast Asia, India and the Middle East in the Ming Dynasty. Altogether he made 7 voyages in the 15th century. He travelled more than 50,000 km and visited 30 countries new to China and developed many trade links. He is considered one of the earliest naval explorers in Chinese history.
海军探险家
舰队
Marco Polo
1254--1324
He is the most famous westerner to travel the Silk Road and the only person to provide information about China to the outside world. In 1271 he set out to reach the Mongol Empire and then China. In 1295, he arrived back in Europe. Three years later he was imprisoned by the Genoese. While in prison, he told the story of his travel to a fellow prisoner who wrote his adventures down. When his book was published it became a best-seller.
热那亚人
How do you think seamen like them found their way before modern accurate methods of navigation were invented?
Kept close to the shore, used nature such as the sun, wind, birds, tide, etc, to help them；
used some of the instruments including a compass, astrolabe, etc
compass
astrolabe
星盘