|
|
صفحة: 57
Booklet Page 35 : More Practice One problem that mountain climbers and travelers to high altitudes might experience is altitude sickness . Find out more about this problem . Complete the passage with one word in each blank space . If you ' re planning to climb Everest , fly to La Paz , Bolivia , or go somewhere where the altitude is above the 6 , 000 feet ( 1 , 800 meters ) , you need to prepare for altitude sickness . Altitude sickness occurs as a of the body ' s failure to adapt to the lack of oxygen at higher altitudes . Travelers who ascend quickly to high altitudes may not give their bodies enough time to adjust and they may suffer from symptoms , as headaches , nausea , confusion and shortness of breath . a person feels the first sign of these symptoms , it is time to 4 _ climbing . Early symptoms do not mean that a person has to descend 5 immediately . _ , they do mean that the climber should slow down and stop ascending until the have disappeared . This may take a day or two , or several weeks , depending the altitude and the time taken to 8 reach that altitude . If the symptoms worsen , a person has to descend as soon as possible that the body can adjust . the dangers , many climbers ignore the symptoms and keep on going 10 they are determined to reach the top at all costs . These people put their lives _ danger and risk serious physical consequences . 12 breaking a leg or twisting an ankle , altitude sickness can result in death . Problems are usually avoided by stopping for at one day at 14 7 , 000 feet ( 2 , 000 meters ) and by climbing no more than 2 , 000 feet ( 600 meters ) a day above 7 , 000 feet ( 2 , 000 meters ) . This rest can the difference between 15 life and death . _ altitude sickness is very dangerous , it can be avoided 16 if a climber takes precautions and lets the body gradually adjust to the different altitude .
|
|