首页
登录
职称英语
Avalanche Vocabulary and Expressions snowslide entrain snowmobiler
Avalanche Vocabulary and Expressions snowslide entrain snowmobiler
游客
2023-12-29
23
管理
问题
Avalanche
Vocabulary and Expressions
snowslide entrain snowmobiler serac collapse
snowslip spontaneous seismic endemic [br] What condition is necessary for the forming of a powder snow avalanche?
Avalanche
An avalanche, also called a snowslide or snowslip, is a rapid flow of snow down a sloping surface. Avalanches are typically triggered in a starting zone from a mechanical failure in the snowpack when the forces on the snow exceed its strength but sometimes only with gradually widening. After initiation, avalanches usually accelerate rapidly and grow in mass and volume as they entrain more snow. If the avalanche moves fast enough some of the snow may mix with the air forming a powder snow avalanche, which is a type of gravity current.
Slides of rocks or debris, behaving in a similar way to snow, are also referred to as avalanches. The remainder of this article refers to snow avalanches.
The load on the snowpack may be only due to gravity, in which case failure may result either from weakening in the snowpack or increased load due to precipitation. Avalanches that occur in this way are known as spontaneous avalanches. Avalanches can also be triggered by other loads such as skiers, snowmobilers, animals or explosives. Seismic activity may also trigger the failure in the snowpack and avalanches.
Although primarily composed of flowing snow and air, large avalanches have the capability to entrain ice, rocks, trees, and other material on the slope, and are distinct from mudslides, rock slides, and serac collapses on an icefall. Avalanches are not rare or random events and are endemic to any mountain range that accumulates a standing snowpack. Avalanches are most common during winter or spring but glacier movements may cause ice and snow avalanches at any time of year. In mountainous terrain, avalanches are among the most serious objective natural hazards to life and property, with their destructive capability resulting from their potential to carry enormous masses of snow at high speeds.
There is no universally accepted classification of avalanches—different classifications are useful for different purposes. Avalanches can be described by their size, their destructive potential, their initiation mechanism, their composition and their dynamics.
选项
A、The avalanche moves in moderate speed.
B、The avalanche moves in slow motion.
C、The avalanche moves quick enough.
D、The avalanche moves with debris.
答案
C
解析
根据原文“If the avalanche moves fast enough…forming a powder snow avalanche…”判断,雪崩运行速度足够快是其必要条件,故本题应该选C。
转载请注明原文地址:https://tihaiku.com/zcyy/3314981.html
相关试题推荐
IMF’sConcernaboutZimbabwe’sEconomyVocabularyandExpressionsInternational
IMF’sConcernaboutZimbabwe’sEconomyVocabularyandExpressionsInternational
IMF’sConcernaboutZimbabwe’sEconomyVocabularyandExpressionsInternational
IMF’sConcernaboutZimbabwe’sEconomyVocabularyandExpressionsInternational
StockMarketVocabularyandExpressionsdebtmarketliquidinvestmentu
StockMarketVocabularyandExpressionsdebtmarketliquidinvestmentu
StockMarketVocabularyandExpressionsdebtmarketliquidinvestmentu
StockMarketVocabularyandExpressionsdebtmarketliquidinvestmentu
StockMarketVocabularyandExpressionsdebtmarketliquidinvestmentu
StockMarketVocabularyandExpressionsdebtmarketliquidinvestmentu
随机试题
_____boxerwasstrong,but_____hadagoodbuildandwaslightonhisfeet.A、Eith
世界上货币种类繁多,不可能一一为本国货币制定与各国货币兑换的汇率,因此就要选择某一关键货币作为制定汇率的主要对象。关键货币必须是()。A、国际上普遍接
[originaltext]AhugestormthatcollapsedpartofacliffonIsrael’scentr
()文化是企业经营作风、精神面貌、人际关系的动态体现,也是企业精神、企业价值观
助力训练是康复治疗中肌力训练常用的治疗技术,它的描述不正确的是:A.指在外力的辅
胎盘早剥性阴道出血的特征是A.阴道出血的发生无诱因 B.贫血程度与阴道出血不成
当ETF交易所上市交易后,下列说法正确的是( )。A.每日开市前披露前一日的基
患儿,男,3岁。面色萎黄,形体消瘦,时有口干腹胀,不思饮食,烦躁啼哭,毛发稀疏,
关于阿司匹林的作用与相应机制,不正确的是A.解热作用是抑制中枢PG合成 B.抗
(2017年真题)长江公司2015年4月1日自证券市场购入北方公司发
最新回复
(
0
)