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
49
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] 【L13】
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
through which
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3314712.html
相关试题推荐
America’smorecapitalistsportsfanscommonlyacknowledgethattheircountry
America’smorecapitalistsportsfanscommonlyacknowledgethattheircountry
America’smorecapitalistsportsfanscommonlyacknowledgethattheircountry
America’smorecapitalistsportsfanscommonlyacknowledgethattheircountry
America’smorecapitalistsportsfanscommonlyacknowledgethattheircountry
Duringtheirsleepwenotedanunexpectedphenomenonthatoccurredsporadically.
Thecommontrickofthismerchantisthatthecontractisdeliberatelycouchedi
Intheincreasinglyfiercemarket,commonshareholderslooktoindependentboard
America’smorecapitalistsportsfanscommonlyacknowledgethattheircountr
America’smorecapitalistsportsfanscommonlyacknowledgethattheircountr
随机试题
[audioFiles]2015m8x/audio_ezfj_ezflisteningd_20157_006[/audioFiles]
患者胆怯易惊,虚烦不眠,偶有眩晕,苔白腻,脉弦滑。治疗应首选的方剂是()。
翟希贤根据合唱作品( )A.《草原上升起不落的太阳》 B.《牧歌》 C.《
风险应对是指风险应对策略的选择,根据风险分析结果,结合风险承受度,权衡风险与收益
急性肾衰病人的饮食护理中错误的是A、高热量 B、充足维生素 C、忌含钾丰富的
根据《刑法》规定,单位受贿罪的主体有( )。 ?A、国家机关 B、国有公司
一般来说,不受意识支配的神经是()。A.运动神经 B.中枢神经 C.交感神
下列药物中不属于抗抑郁药物的是A.马普替林 B.西酞普兰 C.多奈哌齐 D
哪一项是指下颌向各个方向所做最大范围的运动?A、开闭口运动 B、前后运动 C
下列选项中,劳动者可以单方面解除劳动合同的情形包括()。 A.用人单
最新回复
(
0
)