An avalanche is a sudden and rapid flow of snow, often mixed with air and water, down a mountainside. Avalanches are____1____ the biggest dangers in the mountains for both life and property.
All avalanches are caused by an over-burden of material, typically snowpack, that is too massive and unstable for the slope____2____ supports it. Determining the critical load, the amount of over-burden which is____3____ cause an avalanche, ____4____ acomplex task involving the evaluation of a number of factors.
Terrain slopes flatter than25degrees or steeper than60degrees typically have a low ____5____ of avalanche. Snow does not____6____ significantly on steep slopes; also, snow does not ____7____ easily on flat slopes. Human-triggered avalanches have the greatest incidence when the snows angle of rest1 is____8____ 35 and45 degrees; the critical angle, the angle at which the human incidence of avalanches is greatest, is38degrees. The rule of thumb2 is: A slope that is____9____ enough to hold snow but steep enough to ski has the potential to generate an avalanche, regardless of the angle. Additionally3, avalanche risk increases with ____10____;that is, the more a slope is disturbed by skiers, die more lijkely it is that an avalanche will occur.
Due to the complexity of the subject, winter travelling in the backcountry4 is never 100% safe. Good avalanche safety is a continuous____11____,, including route selection and examination of the snowpack, weather____12____ and human factors. Several well-known good habits can also____13____ the risk. If local authorities issue avalanche risk reports, they should be considered and all warnings should be paid ____14____ to. Never follow in the tracks of others without your own evaluations; snow conditions are almost certain to have changed since they were made. Observe the terrain and note obvious avalanche paths where plants are____15____ or damaged. Avoid traveling below others who might trigger an avalanche.
词汇:
avalanche / ?v?l?nt?, -lɑ?n? / n.雪崩
snowpack / sn??p?k / n.积雪场
terrain / tere?n / n.地形,地势
steep / sti?p / adj.险峻的,陆峭的
trigger / tr?g? / v.引起,激发
incidence / ?ns?d?ns / n.发生
ski / ski? / v.滑雪
complexity / k?mpleks?t? / n.复杂性
注释:
1.angle of rest:这里指积雪保持静止的角度。
2.rule of thumb:指a broadly accurate principle, based on experience or practice rather than theory,即通用法则,经验法则
3.Additionally:是一个副词,用来引人新的事实或论点,意为此外。
4.backcountry:人烟稀少的地区
练习:
1. A among B of C to D in
2.A when B that C who D whose
3.A mostly B likely C clearly D surely
4.A are B will be C is D was
5.A weight B form C risk D work
6.A fall B flow C roll D gather
7.A fall B flow C roll D gather
8.A among B between C with D for
9.A thick B thin C flat D rocky
10.A use B time C snow D rain
11.A journey B trip C fact D process
12.A conditions B reports C forecast D event
13.A increase B reduce C improve D remove
14.A price B effort C attention D money
15.A missing B grown C big D fresh
历年雅思作文真题的总结[5]
06年6月17日雅思作文的真题
2006年雅思考试的听力真题及答案
IELTS口语中关于学习的问题的总结
雅思语汇的试题:多种方式记单词第8期
雅思历年考试的真题:听力真题V30019
历年雅思作文真题的总结[3]
2006年1月21日雅思作文的考题
雅思口语的真题:福州2.20口语TOPIC
雅思历年的真题:听力真题V69(2003新题)
口语真题总结的另外的一个版本
马良的写作素材库
雅思口语测试部分试题的参考
雅思阅读的真题V54
06年2月25日雅思作文的考题
06年2月18日雅思作文的考题
雅思历年的真题:听力真题V68(2003新题)
雅思语汇的试题:多种方式记单词第5期
雅思最近常见的话题的考试准备
雅思历年的真题:听力真题V86修订版
雅思语汇的试题:多种方式记单词第6期
雅思语汇的试题:多种方式记单词第10期
IELTS口语中关于工作的问题的总结
雅思听力的真题V54
雅思历年的真题:听力真题:V30030
雅思语汇的试题:多种方式记单词第12期
雅思范文:谈谈你身边城市交通的问题
雅思语汇的试题:多种方式记单词第7期
06年3月25日雅思作文的真题
06年3月11日考试雅思的作文题
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |