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
12
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] 【L3】
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
imbalance
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3929262.html
相关试题推荐
______umbrellasarecommonlyusedtoprotect______peoplefrom______rain.A、/...th
Hewasfrightenedby______lightning.A、boltofB、apieceofC、aflashofD、aA
Heart______ismuchmorecommonthesedaysthanitwaseventenyearsago.A、surge
Itiscommonlyagreedthatallgovernmentsshouldtakeimmediatemeasurestoend
______alanguagefamilyisagroupoflanguageswithacommonoriginandsimila
Acommonquestionthatpeopleaskastorywriteriswhetherornothehasexperi
Cooperationisthecommonendeavoroftwoormorepeopletoperformatasko
Cooperationisthecommonendeavoroftwoormorepeopletoperformatasko
Cooperationisthecommonendeavoroftwoormorepeopletoperformatasko
Cooperationisthecommonendeavoroftwoormorepeopletoperformatasko
随机试题
Everykidmaycomplainaboutschoolnowandthen,butonlyaemailpercentageof
TheU.S.andChinadon’tagreeonmuchthesedays.GermanyandFranceshare
Childrenundertheageof16arenot______toenterforthecompetition.A、possi
[originaltext]M:Ihearyouhaverentanewhouse.Sowhat’sitlikehavingar
常用于结直肠癌高危人群筛查的检查方法是A.直肠指诊 B.便常规 C.大便潜血
我国社会主义初级阶段个人收入的分配制度是( )A.按劳分配和按生产要素分配相结
治疗急性肺水肿时,下列哪项不妥:A.西地兰 B.速尿 C.硝普钠 D
Thechangeinthatvillagewasmiraculou
细菌毒素中,毒性最强的是A.金黄色葡萄球菌肠毒素 B.破伤风痉挛毒素 C.霍
甲公司与乙公司约定:为满足甲公司开发住宅小区观景的需要,甲公司向乙公司支付10
最新回复
(
0
)