首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Avalanche and Its Safety An avalanche is a sudden and rapid flow of snow, often mixed with air and water, down a mountainside. A
Avalanche and Its Safety An avalanche is a sudden and rapid flow of snow, often mixed with air and water, down a mountainside. A
admin
2009-06-15
69
问题
Avalanche and Its Safety
An avalanche is a sudden and rapid flow of snow, often mixed with air and water, down a mountainside. Avalanches are(51)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(52)supports it. Determining the critical load, the amount of over-burden which is(53)to cause an avalanche,(54)a complex task involving the evaluation of a number of factors.
Terrain slopes flatter than 25 degrees or steeper than 60 degrees typically have a low(55)of avalanche. Snow does not(56)significantly on steep slopes; also, snow does not(57)easily on flat slopes. Human-triggered avalanches have the greatest incidence when the snow’s angle of rest is(58)35 and 45 degrees; the critical angle, the angle at which the human incidence of avalanches is greatest, is 38 degrees. The rule of thumb is: A slope that is(59)enough to hold snow but steep enough to ski has the potential to generate an avalanche, regardless of the angle. Additionally, avalanche risk increases with(60); that is, the more a slope is disturbed by skiers, the more likely it is that an avalanche will occur.
Duc to the complexity of the subject, winter travelling in the backcountry is never 100% safe. Good avalanche safety is a continuous(61), including route selection and examination of the snowpack, weather(62), and human factors. Several well-known good habits can also(63)the risk. If local authorities issue avalanche risk reports, they should be considered and all warnings should be paid(64)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(65)or damaged. Avoid traveling below others who might trigger an avalanche.
选项
A、missing
B、grown
C、big
D、fresh
答案
A
解析
该句是作者给出的一系列忠告之一,即,认真观察地形,注意明显的雪崩路径:没有植物或植物被毁坏的地方。选项B、C、D均不符合句义。
转载请注明原文地址:https://kaotiyun.com/show/PUhd777K
本试题收录于:
职称英语理工类基础题库职称英语分类
0
职称英语理工类基础
职称英语
相关试题推荐
Accordingtotheauthor,recentOlympicGameshave______.Thebasketballexampleimpliedthat______.
ThepeoplewhospeakEsperantohopethatthelanguagesomedaywillbecometheinternationallanguagefortrade,science,anddip
CharterSchoolsAmericanpubliceducationhaschangedinrecentyears.OnechangeisthatincreasingnumbersofAmericanparents
CharterSchoolsAmericanpubliceducationhaschangedinrecentyears.OnechangeisthatincreasingnumbersofAmericanparents
TheDiscoveryofPenicillin(青霉素)Intheautumnof1928,aScottishscientistAlexanderFlemingwassearchingforasubstance
Notallmemberstatesabidedbytheprincipletheyhadagreedonpreviously.
FriendsMayBeKeytoLivingLongerLookingforthesecretofalonglife?Lookcloselyatyourfriends.Newresearchsugges
AdultEducationVoluntarylearninginorganizedcoursesbymaturemenandwomeniscalledadulteducation.Sucheducationisoff
I’mworkingwitha(guy)fromLondon.
Hisquestforeternalyouthfailedintheend.
随机试题
将群体法与计算机技术结合起来的决策方法是()
男性,35岁。1型糖尿病病史10年,平素应用胰岛素治疗,未检测血糖。此次外出,2天未应用胰岛素,出现乏力,口渴,萎靡,恶心,呕吐,腹痛。于医院就诊时化验血糖20.32mmol/L,尿酮体卅,血气pH7.01,HCO35.3mmol/L,血钾3.56mm
桑菊饮与桑杏汤中均含有的药物是()
A、盐酸布桂嗪B、盐酸吗啡C、右丙氧芬D、盐酸曲马多E、苯噻啶临床使用右旋体的是
用于清除物体表面的锈蚀、氧化皮及各种污物,使金属表面呈现一层较均匀而粗糙的表面,以增加漆膜的附着力。指的是机械方法中的()。
根据《合同法》的规定,有()情形之一的,当事人可以解除合同。
下列对时间定额与产量定额的表述中不正确的有( )。
collapse
WhydidthegirlinviteUncleSmithtodinner?
WhenIwasakid,Ineverknewwhatmyparents—oranyoneelse’s—didforaliving.AsfarasIcouldtell,allgrownupshadm
最新回复
(
0
)