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  3. Death comes quickly in the mountains. Winter holiday makers are caught unaware as they happily ski away from the fixed runs, lit

Death comes quickly in the mountains. Winter holiday makers are caught unaware as they happily ski away from the fixed runs, lit

admin2011-02-28  26
问题    Death comes quickly in the mountains. Winter holiday makers are caught unaware as they happily ski away from the fixed runs, little realizing that a small avalanche (雪崩) can send them crashing in a bone breaking fall down the slope and leave them buried under tons of white snow. There are lots of theories about how to avoid disaster when hit by an avalanche. Practice is normally less cheerful.
   The snow in the Salzburg of Austria where a recent disaster took place was typical avalanche material. For several days before the incident I had skied locally. Early winter snow was wearing thin and covered with ice. On top of that new, warmer flakes (雪片) were gently falling to produce a dangerous carpet. To the skier who enjoys unmarked slopes it is tempting stuff, deep new powder snow on a hard base—the skiing that dreams are made of. And sometimes nightmares.
   Snow falls in sections like a cake. Different sections will have different densities because of the temperatures at the time of the fall and in the weeks afterwards. Problems come when any particular section is too thick and not sticking to the section beneath. The snow of the past few weeks had been falling in rather higher temperatures than those of December and early January. The result of these conditions is that even a light increase in the temperature sends a thin stream of water between the new snow and the old. Then the new snow simply slides off the mountain.
   Such slides are not unexpected. Local citizens know the slopes which tend to avalanche and the weather in which such slides are like. Traps are Set to catch the snow or prevent it slipping; bombs are placed and exploded from time to time to set off small avalanches before a big one has time to build up; and, above all, skiers are warned not to ski in dangerous areas.
   In spite of this, avalanches happen in unexpected areas and, of course, skiers ignore, the warnings. The one comfort to recreational skiers, however, is that avalanche incidents on the,
marked ski-slopes are quite rare. No ski area wants the image of being a death trap.
Although accidents do happen, skiers will be reasonably safe if______.
选项 A、they stay on the officially approved slopes
B、they ski only for pleasure
C、they ski only on the unmarked ski slopes
D、they choose less crowded ski slopes
答案A
解析 本题考查细节理解。最后一段讲到经过官方认可的开放滑雪场很少出现雪崩，哪个滑雪场也不愿意成为死亡营地，因此在开放的滑雪场滑雪是安全的。
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