世界未解之谜(英文).pptVIP

--ByKellyXia 第一页，编辑于星期三：五点 七分。 Contents Bermuda Triangle -the Devil’s Triangle Crop Circle Loch Ness Monster UFO 第二页，编辑于星期三：五点 七分。 Location The Bermuda Triangle(百慕大三角) is an imaginary area in the Atlantic Ocean. It extends more than one million square kilometers between the island of Bermuda, the coast of southern Florida and the island of Puerto Rico（波多黎各）. Drawing an imaginary line to link these three places creates the three sides of a triangle. 第三页，编辑于星期三：五点 七分。 The mystery surrounding the Bermuda Triangle is that the area seems to be extremely dangerous to airplanes and ships. Some people believe that at least fifty ships and twenty planes have disappeared there during the past one hundred years. The accident that first suggested the danger of the Bermuda Triangle was the disappearance of five American Navy planes in 1945. The planes carried fourteen people on a training flight. They never returned. And a plane sent to search for them also disappeared. Newspaper reporters and other writers called the planes the Lost Patrol. Phenomenon 第四页，编辑于星期三：五点 七分。 Different suspects The magnetic field say（磁场说） The black hole say （黑洞说） The subsonic wave say（次声说） The water bridge say （水桥说） The clear sky swift flow say（清空湍流说）。 第五页，编辑于星期三：五点 七分。 Crop Circles Crop circles (麦田怪圈)is something unknown that flatten（压平） crops to produce geometric（几何的） pictures. 第六页，编辑于星期三：五点 七分。 Phenomenon In the UK farmers recall simple circles appearing on their land for generations. By 1990 crop circles had exploded into the public mind as the new phenomenon changed from simple circular（圆形） patterns into huge and complex, geometric formations. The crop circles are a world-wide phenomenon and each year new reports come from an increasing number of countries. 第七页，编辑于星期三：五点 七分。 Explanations 1. The magnetic field U.S. experts examined the more than 130 Crop Circles, found that 90% of the cycle near the high-voltage wires (高压线). 2. tornado (龙卷风) most of the Crop