This mountain valley was becoming well known to skiers. It was dangerous. In fact, more than 120 persons had lost their lives in 1936 and another 200 died in 1937 as a result of avalanches before it became a major ski area. Thus, development of Alta and other major ski resorts in the west was dependent upon controlling the avalanche. The Forest Service set out to do it, and did, with its corps(团队)of snow rangers.

　　It takes many things to make a snow ranger. The snow ranger must be in excellent physical condition. He must be a good skier and a skilled mountain climber. He should have at least a high school education, and the more college courses in geology, physics, and related fields he has, the better.

　　He studies snow, terrain, wind, and weather. He learns the conditions that produce avalanches. He learns to forecast avalanches and to bring them roaring on down the mountainsides to reduce their killing strength. The snow ranger learns to do this by using artillery(炮), by blasting with TNT, and by the difficult and skillful art of skiing avalanches down.

　　The snow ranger, dressed in a green parka which has a bright yellow shoulder patch, means safety for people on ski slopes. He pulls the trigger(扳机) on a 75 mm. Recoilless rifle(无后坐力步枪), skis waist deep in powder testing snow stability, or talks with the ski area's operator as he goes about his work to protect the public from the hazards(危险)of deep snow on steep mountain slopes.

【2017届高考英语一轮复习课时作业40：Unit 5《Meeting your ancestors》（新人教版选修8浙江专用）】相关文章：

★ 【北京专用】2014届高考英语一轮复习方案课时作业：必修4 Unit 1 Women of achievement

★ 【浙江专用】2014届高考英语一轮复习课时作业(一)必修1Unit 1《Friendship》

★ 2014届高考英语一轮复习课时作业(十七)必修3Module 5《Great People and Great Inventions of Ancient China》（外研版）

★ 四川省2016届高考英语一轮复习课时作业（46） Module 4 Which English 外研版选修8

★ 【北京专用】2014届高考英语一轮复习方案课时作业：必修5 Unit 5 First aid

★ 【浙江专用】2014届高考英语一轮复习课时作业(三十七)选修8Unit 2《Cloning》

★ 【浙江专用】2014届高考英语一轮复习课时作业(十八)必修4Unit 3《A taste of English humour》

★ 2014届高考英语一轮复习课时作业(八)必修2Module 2《No Drugs》（外研版）

★ 【人教版】2014届高考英语一轮复习指导考点针对练：必修3 unit5《Canada》

★ 2014届高考英语一轮复习课时作业(三十四)选修6Module 4《Music》（外研版）