18.The Leaning Tower of Pisa
The tower of Pisa has never been upright. Its leaning can date back to the time not long after it was built in 1173. First, the tower tilted towards the north. Then during the prolonged process of construction till 1370, the tower had always been leaning to the south.
Throughout the monuments history, many efforts have been made to halt the lean. These efforts have so far helped prevented the tower from topping over. But since 1911, the offset at the top of the tower has increased at a fairly consistent rate. Shortly after 1989, for the sake of safety, the tower at Pisa was closed to visitors.
In 1990, a special commission was organized to find new ways to save the tower. At first the commission worked mainly on the outside of the tower, but in the next few months, more radical techniques will be tried to stop the towers lean. The ultimate goal is not to straighten the tower but to ease its top back a little. With luck, the landmark can stand into the next century.
湖南高考英语复习课件牛津译林版模块选修6《Unit 4 Helping people around the World》帮助全球
湖南高考英语复习牛津译林版模块必修4练习《Unit 3 Tomorrow’s World》Tomorrow’s world明天的世界界
湖南高考英语复习牛津译林版模块选修6练习《Unit 1 Laughter is good for you》笑对你有好处
湖南高考英语复习课件牛津译林版模块必修5《Unit 3 Science versus nature》科学与自然
湖南高考英语复习牛津译林版模块必修2练习《Unit 2 Wish you were here》希望你在这里
湖南高考英语复习牛津译林版模块必修3练习《Unit 3 Back to the past》回到过去
湖南高考英语复习牛津译林版模块选修7练习《Unit 4 Public transport》公共交通
广东高考英语复习单元测试必修2:Unit5《Music》(新人教版)
湖南高考英语复习牛津译林版模块选修6练习《Unit 2 What is happiness to you?》对你来说幸福是什么
广东高考英语复习单元测试必修1:Unit5《Nelson Mandela- a modern hero》(新人教版)
湖南高考英语复习课件牛津译林版模块选修6《Unit 2 What is happiness to you?》对你来说幸福是什么
湖南高考英语复习牛津译林版模块选修7练习《Unit 2 Fit for life》健康生活
湖南高考英语复习牛津译林版模块选修7练习《Unit 1 Living with technology》与技术同在
湖南高考英语复习牛津译林版模块必修5练习《Unit 3 Science versus nature》科学与自然
湖南高考英语复习牛津译林版模块选修6练习《Unit 3 Understanding each other》相互了解
广东高考英语复习单元测试必修3:Unit2《Healthy eating》(新人教版)
广东高考英语复习单元测试必修1:Unit4《Earthquakes》(新人教版)
广东高考英语复习单元测试必修2:Unit1《Cultural relics》(新人教版)
湖南高考英语复习课件牛津译林版模块选修6《Unit 3 Understanding each other》相互了解
湖南高考英语复习课件牛津译林版模块选修7《Unit 4 Public transport》公共交通
湖南高考英语复习课件牛津译林版模块必修4《Unit 3 Tomorrow’s World》Tomorrow’s world明天的世界
广东高考英语复习单元测试必修2:Unit4《Wildlife Protection》(新人教版)
湖南高考英语复习课件牛津译林版模块必修2《Unit 2 Wish you were here》希望你在这里
湖南高考英语复习牛津译林版模块必修3练习《Unit 1 The world of our senses》感觉的世界
广东高考英语复习单元测试必修3:Unit1《Festivals around the world》(新人教版)
湖南高考英语复习牛津译林版模块选修7练习《Unit 3 The World online》网上世界
广东高考英语复习单元测试必修3:Unit3《The Million Pound Bank Note》(新人教版)
湖南高考英语复习课件牛津译林版模块必修5《Unit 2 The Environment》The environment环境
湖南高考英语复习牛津译林版模块必修2练习《Unit 3 Amazing people》有所作为的人
广东高考英语复习单元测试必修1:Unit1《Friendship》(新人教版)
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