London Bridge is falling down, falling down<div>London Bridge is falling down, my fair lady</div> <div><br></div>一、英国地图->桥的作用 london is a city of England there is one river that cross london, that river is the Thames. <div>people who live on this side of river want to go across over the river, so they build bridge.</div><div>Bridges are mostly useful for crossing rivers, but people have also used bridges for a long time for walking. Bridges are structures built over rivers or some other obstacle. They allow people or vehicles to cross from one side to another<br></div> 二、两个著名的桥<div><font color="#ed2308">A、Tower Bridge</font></div> Tower Bridge is in London. It crosses the River Thames near the Tower of London伦敦塔. It is a drawbridge可开合的吊桥, which allows ships through the bridge deck桥板 when the deck is raised at an angle.<div>Many tourists go to London to see the Tower Bridge. It has its own exhibition centre展览中心 in the horizontal walkway水平走道. This gives one of the best exhibition centre in London.<br></div> <ul><li> facts about London's Tower Bridge:</li></ul>1、The central span of the bridge can be raised to allow ships to pass 桥的中心可以升起让船只通过。<br>2、More than 400 workers helped to build the bridge and over 70000 tons of concrete were was sunk to the bed of the River Thames to support the bridge 超过7万吨水泥注入到河床来支撑桥。<br>3、Tower Bridge is 244 metres long and each tower is 65 metres high.<br> <font color="#ed2308">B、London Bridge</font> london经典建筑：<div><br></div><div>亲亲科学图书馆</div> <div><br><br></div> <div><br></div> <div><br></div>