• Eighteen land sports including: adventure racing（冒险赛车）,ice
climbing（攀登冰坡）, freestyle skiing（花样滑雪）, speed biking （变速自行 车）etc.
• Fifteen water sports including: free-diving（自由潜水）, open water
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• Jumpers stand at about 40 meters above the height of the tower crane, bridge, building, or even a hot air balloon,and the end is fixed by a long rubber strip(橡胶带) tied to the ankle, then outstretch arms, legs close together, head down to jump
swimming（天然水域游泳）,scuba（戴水肺潜水）diving, windsurfing（帆板 运动 ）etc.
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NOW let's go to see some popular extreme sports
Bungee jumping is an
activity that involves jumping from a tall structure while connected to a large elastic cord.
founder of extreme sports, extreme
spห้องสมุดไป่ตู้rts are a number of projects
extending from skateboarding. At
the end of fifties and the early
nineteen sixties，the Skateboarding
evolved from surfing, and now has
become one ofgthe world's most"
cool" movement.
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• Skateboarding is not to look cool。 Skateboarding is a physical exercise, it's very challenging
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Skydiving 跳伞运动
Skydiving involves jumping from an aircraft with a parachute(降落伞） and performing acrobatics(杂 技) in the free fall as long as possible before pulling the ripcord（降落伞的开 伞索） and opening the parachute.
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• Skateboarding day is on June 21st. If you are loyal to skateboarding molecules, so on this day on your board to celebrate the world on board.
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The definition of extreme sports
An extreme sport(also called action sport and adventure sport)is a popular term for certain activities perceived as having a high level of inherent danger.
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蹦极之最 The world's highest bungee jumping point is located at the American
Royal Gorge Bridge(皇家峡谷悬索桥 )bugee jumping, 321 meters high.
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Second high bungee jumping point is in Macao tower, 233 meters high
• Nine air sports are mentioned including: base jumping, （定点或极限 跳伞）bungee jumping, ski jumping（跳台滑雪）,hang gliding（滑翔式飞行） sky surfing（空中冲浪滑翔）sky flying（空中飞行） etc.
These activities often involve speed,height,hight level of physical exertion,and hightly specialized gear or spectacular stunts.
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Classification
In 2004, author Joe Tomlinson classified extreme sports into those that take place in air, land, and water.
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The third tallest bungee jumping points is
Swiss Verzasca(韦尔扎撕卡) dam
bungee jumping, 220 meters high
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Skateboarding 滑板运动
Skateboard project is the historical
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Since the beginning of 20th Century, aircraft are widely used in aviation(航空） and military（军事） aspects, a parachute is practical for flight personnel life-saving appliances, and gradually developed into sports activities.