12、Travelers are screened by metal detectors. Explosive detection machines used include X-ray machines and explosives trace-detection portal machines called TSA is working on new scanning machines that are still effective searching for objects that arenot allowed in the airplanes but that don\'t depict the passengers in a state of undress that some find embarrassing. Explosive detection machines can also be used for both carry on and checked baggage. In the United
States, non-passengers were once allowed on the concourses to meet arriving friends or relatives at their gates, but this is now greatly restricted due to the terrorist attacks on September 11, 2001. Non-passengers must obtain a gate pass to enter the secure area of the airport. The most common reasons that a non-passenger may obtain a gate pass is to assist children and the elderly as well as for attending business meetings that take place in the secure area of the airport. In the United States, at least 24 hours notice is generally required for those planning to attend a business meeting inside the secure area of the airport.
13、A pyramid is a structure whose outer surfaces are triangular and converge to a single point at the top, making the shape roughly a pyramid in the geometric sense. The square pyramid, with square base and four triangular outer surfaces, is a common version.Pyramids have been built by civilizations in many parts of the
world. For thousands of years, the largest structures on Earth were pyramids，such as the Great Pyramid of Khufu in Egypt, which is the only one of the Seven Wonders of the Ancient World still remaining. Khufu\'s Pyramid is built mainly of limestone, and is considered an architectural masterpiece. It contains over 2,000,000 blocks ranging in weight from 2.5 tonnes to15 tonnes and is built on a square base with sides measuring about 230 m, covering 13 acres. Its four sides face the four cardinal points precisely and it has an angle of 52 degrees. The original height of the Pyramid was 146.5 m, but today it is only 137 m high, the 9 m that is missing is due to the theft of the fine quality white Tura limestone covering, or casing stones, for construction in Cairo. It is still the tallest pyramid.
14、Moscow is the capital and the largest city of Russia with 12.2 million residents within the city limits and 16.8 million within the urban area. It is the capital of the Central Federal District and Moscow Oblast. Moscow is a major political, economic, cultural, and scientific center in Russia and Eastern Europe, as well as the largest city entirely on the European continent. The city is well known for its unique architecture which consists of many different historic buildings such as Saint Basil\'s Cathedral with its brightly colored domes. Moscow is considered the center of Russian culture, having served as the home of prestigious Russian artists, scientists and sports figures during the course of its history and because of the presence of many different museums, academic and political institutions and theaters. Moscow is also the seat of power of
the Government of Russia, being the site of the Moscow Kremlin, a medieval city-fortress that is today the residence of the Russian president. The Moscow Kremlin and the Red Square are also one of several World Heritage Sites in the city.
15、London is the capital and most populous city of England and the United Kingdom. Standing on the River Thames, London is a leading global city, with strengths in the arts, commerce, education, entertainment, fashion, finance, healthcare, media, professional services, research and development, tourism, and transport all contributing to its prominence. London is a world cultural capital. It is the world\'s most-visited city as measured by international arrivals and has the world\'s largest city airport system measured by passenger traffic. London\'s 43 universities form the largest concentration of higher education institutes in Europe. London contains four World Heritage Sites: the Tower of London; Kew Gardens; the site comprising the Palace of Westminster, Westminster Abbey, and St Margaret\'s Church; and the historic settlement of Greenwich. Other famous landmarks include Buckingham Palace, the London Eye, St Paul\'s Cathedral, Tower Bridge, etc. London is home to numerous museums, galleries, libraries, sporting events and other cultural institutions, including the British Museum, National Gallery, British Library and 40 West End theatres.
2、 请用英语回答下列问题（测试口语能力，要求每个问题至少需用八句句子回答）：
1、 What are the advantages and disadvantages of online shopping?
2、 What important notices should a tour leader mention to the tour group members before the departure to Thailand?
3、 What important notices should a tour leader mention to the tour group members before the departure to Western Europe?
4、Suppose a tourist is seriously ill during the outbound tour and needs rescue, what should the tour leader do?
