一、阅读下面的文段,完成1-4题。(20分,每小题5分)莫高窟位于甘肃敦煌市东南25公里的鸣沙山东麓崖壁上,上下五层,南北长约1600米。始凿于366年,后经十六国至元十几个朝代的开凿,形成一座内容丰富、规模宏大的石窟群。现存洞窟492个,壁画45000平方米,彩塑2400余身,飞天4000余身,唐宋木结构建筑5座,莲花柱石和铺地花砖数千块,是一处由建 First, read the following paragraphs to complete the 1-4 questions. (20 points, 5 points for each topic) The Mogao Grottoes are located on the cliffs in the east of Mingsha Mountain, 25 kilometers southeast of Dunhuang City in Gansu Province. The upper and lower five stories are about 1,600 meters long from north to south. It began in 366 years and was later excavated from the 16th to the 10th dynasties to form a group of caves with rich content and large scale. There are 492 existing caves, 45,000 square meters of frescoes, more than 2,400 bodies of color plastics, more than 4,000 flying bodies, 5 wooden buildings in the Tang and Song Dynasties, thousands of lotus pillar stones and paving tiles.