首页
登录
职称英语
Lightning Cloud-to-ground lightning bolts are a common phenomenon, about 100
Lightning Cloud-to-ground lightning bolts are a common phenomenon, about 100
游客
2025-01-26
16
管理
问题
Lightning
Cloud-to-ground lightning bolts are a common phenomenon, about 100 strike Earth’s surface every single second, yet their power is extraordinary. Each bolt can contain 【L1】______volts of electricity.
This enormous 【L2】______is caused by an 【L3】______between positive and negative charges. During a storm, 【L4】______of rain, ice, or snow increase this imbalance and often negatively charge 【L5】______storm clouds. Objects 【L6】______, like steeples, trees, and the Earth itself, become 【L7】______—creating an imbalance that nature seeks to remedy 【L8】______between the two charges.
A step-like series of 【L9】______, called a stepped leader, works its way incrementally downward 【L10】______a storm cloud toward the Earth. Each of these segments is about 46 meters long. When the lowermost step comes within 46 meters of a positively charged object it is met by a 【L11】______ of positive electricity, called a streamer, which can 【L12】______ through a building, a tree, or even a person. The process forms a channel 【L13】______ electricity is transferred as lightning.
Some types of lightning, including the most common types, never leave the clouds but 【L14】______ between differently charged areas 【L15】______. Other rare forms can be 【L16】______ extreme forest fires, volcanic eruptions, and snowstorms. Ball lightning, a small, charged sphere that floats, glows, and bounces along oblivious to the laws of gravity or physics, still 【L17】______.
Lightning is extremely hot—a flash can 【L18】______around it to temperatures five times hotter than the sun’s 【L19】______. This heat causes surrounding air to rapidly expand and vibrate, which creates the 【L20】______we hear a short time after seeing a lightning flash. [br] 【L6】
Lightning
Cloud-to-ground lightning bolts are a common phenomenon—about 100 strike Earth’s surface every single second—yet their power is extraordinary. Each bolt can contain up to one billion volts of electricity.
This enormous electrical discharge is caused by an imbalance between positive and negative charges. During a storm, colliding particles of rain, ice, or snow increase this imbalance and often negatively charge the lower reaches of storm clouds. Objects on the ground, like steeples, trees, and the Earth itself, become positively charged—creating an imbalance that nature seeks to remedy by passing current between the two charges.
A step-like series of negative charges, called a stepped leader, works its way incrementally downward from the bottom of a storm cloud toward the Earth. Each of these segments is about 46 meters long. When the lowermost step comes within 46 meters of a positively charged object it is met by a climbing surge of positive electricity, called a streamer, which can rise up through a building, a tree, or even a person. The process forms a channel through which electricity is transferred as lightning.
Some types of lightning, including the most common types, never leave the clouds but travel between differently charged areas within or between clouds. Other rare forms can be sparked by extreme forest fires, volcanic eruptions, and snowstorms. Ball lightning, a small, charged sphere that floats, glows, and bounces along oblivious to the laws of gravity or physics, still puzzles scientists.
Lightning is extremely hot—a flash can heat the air around it to temperatures five times hotter than the sun’s surface. This heat causes surrounding air to rapidly expand and vibrate, which creates the pealing thunder we hear a short time after seeing a lightning flash.
选项
答案
on the ground
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3929265.html
相关试题推荐
______mostcommonkindoffuelusedby______peasantsinourdistrictiswood.A、a
______umbrellasarecommonlyusedtoprotect______peoplefrom______rain.A、/...th
WorldWarIIiscommonlyacknowledged______someofthe20thcentury’smostnotab
______,CharlesDarwindidmuchtodisprovecommontheoriesaboutbiologicalevo
Itiscommonlyagreedthatallgovernmentsshouldtakeimmediatemeasurestoend
______alanguagefamilyisagroupoflanguageswithacommonoriginandsimila
Cooperationisthecommonendeavoroftwoormorepeopletoperformatasko
Cooperationisthecommonendeavoroftwoormorepeopletoperformatasko
Cooperationisthecommonendeavoroftwoormorepeopletoperformatasko
Cooperationisthecommonendeavoroftwoormorepeopletoperformatasko
随机试题
Liquidityriskarisesfromtheinabilityofabanktoaccommodateunexpected
[originaltext]W:Whatkindoftrainingdoesoneneedtogointothistypeofjo
DearSir,Muchtomyregret,Iwritethislettertocomplainaboutyourcomp
下列属于热气溶胶灭火剂灭火原理的有()。A.吸热降温灭火 B.化学抑制灭火
一些追求快速减肥的女性,认为素食是大量食用蔬菜水果,其他什么都不吃。这种错误的膳
左边给定的是纸盒外表面的展开图,右边哪一项能由它折叠而成? A.如上图所示
Thechangeinthatvillagewasmiraculou
药物透过生物膜的转运机制错误的是A.胞饮作用 B.被动扩散 C.促进扩散
上个世纪90年代,中国高性能计算机领域存在的没得用、不适用、用不起的严重问题制约
(2015年真题)火灾爆炸的预防包括防火和防爆两方面。下列措施中,不符合防爆基本
最新回复
(
0
)