Hello everyone, my name is….im glad to do this presentation in our class.In this presentation we will show you some famous civil engineer over the world.Let’s start our travel nowPart oneAs the saying goes, never has been to the Great Wall, never will be a bawcock. 不到长城非好汉。
Now we are in Beijing, the capital of our countray.The great wall is One of the largest building-construction projects ever carried out, it runs (with all its branches) about 4,000 mi (6,400 km) east to west from the Bo Hai (Gulf of Chihli) to a point deep in Central Asia. Parts of the fortification date from the 4th century BC. In 214 BC Shihuangdi connected existing defensive walls into a single system fortified by watchtowers. These served both to guard the rampart and to communicate with the capital, Xianyang (near modern Xi'an) by signalsmoke by day and fire by night. Originally constructed partly of masonry and earth, it was faced with brick in its eastern portion. It was rebuilt in later times, especially in the 15th and 16th centuries. The basic wall is about 30 ft (9 m) high, and the towers rise to about 40 ft (12 m). It was designated a UNESCO World Heritage site in 1987.中国北方防御性的屏障，是人类建造的大规模建筑工程之一。
