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
2023-12-29
22
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] 【L12】
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
rise up
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3314711.html
相关试题推荐
Cooperationisthecommonendeavoroftwoormorepeopletoperformatasko
Cooperationisthecommonendeavoroftwoormorepeopletoperformatasko
Cooperationisthecommonendeavoroftwoormorepeopletoperformatasko
Cooperationisthecommonendeavoroftwoormorepeopletoperformatasko
Cooperationisthecommonendeavoroftwoormorepeopletoperformatasko
Riceisthe______foodofmostSoutheastAsians.A、commonB、generalC、stapleD、pop
Cooperationisthecommonendeavoroftwoormorepeopletoperformatasko
Cooperationisthecommonendeavoroftwoormorepeopletoperformatasko
Cooperationisthecommonendeavoroftwoormorepeopletoperformatasko
Cooperationisthecommonendeavoroftwoormorepeopletoperformatasko
随机试题
[originaltext]Theworldisnotonlyhungry;itisalsothirstyforwater.T
Askaleft-wingBritonwhattheybelieveaboutthesafetyofnuclearpower,
男性,65岁,慢性喘息性支气管炎病史20余年,近5年来间断出现下肢浮肿,7天前受
患者带下量少,甚至全无,阴部干涩灼痛,阴部萎缩,性交疼痛,头晕耳鸣,腰膝酸软,烘
使用抽出的药液、开启的静脉输用无菌液体须注明开启时间不得超过A.2小时 B.3
梗阻性肥厚型心肌病患者最常见的死亡原因是A.猝死 B.脑卒中 C.休克 D
2012年,下列哪项的同比增长最快?() A.社会组织 B.社会团体
计时工资制的优点不包括()。A.有利于提高出勤率 B.有利于提高自己业务水平
运输的最基本的效用是()。A.改变运输对象的属性 B.克服生产和需求在空间和时
(2020年真题)上市公司收购中,收购人持有的被收购公司的股票18个月内不得
最新回复
(
0
)