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
28
管理
问题
Avalanche
Vocabulary and Expressions
snowslide entrain snowmobiler serac collapse
snowslip spontaneous seismic endemic [br] During what seasons do avalanches often happen?
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、Spring or summer.
B、Summer or autumn.
C、Autumn or winter.
D、Winter or spring.
答案
D
解析
根据原文“Avalanches are most common during winter or spring…”判断,冬季和春季雪崩最常见,故本题应该选D。
转载请注明原文地址:https://tihaiku.com/zcyy/3314983.html
相关试题推荐
IMF’sConcernaboutZimbabwe’sEconomyVocabularyandExpressionsInternational
IMF’sConcernaboutZimbabwe’sEconomyVocabularyandExpressionsInternational
IMF’sConcernaboutZimbabwe’sEconomyVocabularyandExpressionsInternational
StockMarketVocabularyandExpressionsdebtmarketliquidinvestmentu
StockMarketVocabularyandExpressionsdebtmarketliquidinvestmentu
StockMarketVocabularyandExpressionsdebtmarketliquidinvestmentu
StockMarketVocabularyandExpressionsdebtmarketliquidinvestmentu
StockMarketVocabularyandExpressionsdebtmarketliquidinvestmentu
StockMarketVocabularyandExpressionsdebtmarketliquidinvestmentu
StockMarketVocabularyandExpressionsdebtmarketliquidinvestmentu
随机试题
Darwin’s______theorycontributedtothedecayofVictorianism.A、revolutionaryB、
申请植物新品种保护所需满足的条件之一是()。A.独创性 B.实用性
采用滚动预算法编制预算,按照滚动的时间单位不同可分为()。A.逐月滚动 B.
多层砌体结构计算墙体的高厚比的目的,下列中哪一个说法是正确的?()A.稳定
安全生产检查的最终目的是()。A.对“物的安全因素”进行检查 B.对“人的安全
研究表明,肿瘤细胞的生长有以下规律:当肿瘤细胞数目超过1011时才是临床可观察的
CR与普通X线成像比较其优点,叙述错误的是A.降低X线曝光量 B.曝光宽容度增
温水(或乙醇)擦浴时,下列禁忌擦浴的部位是A.面部、心前区、腹部、足部 B.胸
(2019年真题)甲公司为增值税一般纳税人,主要从事彩电的生产与销售业务。20
根据《建设工程施工合同(示范文本)》,发包人应在开工后28天内预付安全文明施工费
最新回复
(
0
)