首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
考研
The sudden up thrust of warm, moist air into the terrible cold of the frozen heights is what creates thunder. The sudden stronge
The sudden up thrust of warm, moist air into the terrible cold of the frozen heights is what creates thunder. The sudden stronge
admin
2010-02-22
57
问题
The sudden up thrust of warm, moist air into the terrible cold of the frozen heights is what creates thunder. The sudden stronger rubbing together or two unlike forces (very warm air against very cold air) develops a kind of electricity called "static electricity". Its charges pro duce lightning and thunder. (46)
Thus the violence of the thunderstorm is an almost direct result of millions of warm water drops being thrown into compatible masses of ice crystals—hitting them, rolling over them, melting them, or being frozen by them into snow or hail.
Exactly how the electric charge is developed by the many, complex forces of this battle of heat and cold is still a matter of opinion. Some scientists think the action of wind against the rain is the principal factor. (47)
These scientists believe the wind tears off the outer surface of each falling drops, like pulling a sweater over a child’s head, making a fine negative charge while leaving the main part of the rain drop positive.
Other scientists believe that the friction of snow crystals breaking in the wind sets up the electrical charge. In reality it may well be all these factors—and more—that combine to do the work.
(48)
In any case, huge masses of electrically charged raindrops and hailstones become sorted into positive and negative reserves of electrical energy at different parts of the thundercloud, creating between them fields of very great extremes.
When the resistance between these fields breaks down, the energy that is suddenly discharged is lightning.
I do not know of any case of lightning directly causing an airplane accident, Cattle and sheep are more likely to be struck by lightning than are airplanes or houses. There is a recorded case that occurred on a mountainside in the western part of the United States in which one bolt of lightning killed 835 sheep. (49)
Evidently the hard, dry earth offered more resistance to the lightning than the route of traveling from the ground, up one leg of an animal, through its moist’ body, and down another leg.
A person’s chances of being killed by a thunderstorm are not very great. In the United States an average of one person in 265,000 dies as a result of a thunderstorm. Today houses, ships, airplanes, and electric power lines are well protected against lightning, and the risk is decreasing. Even a man whose work exposes him almost daily to lightning can do something about it. (50)
Despite the saying that one never knows if lightning strikes him, a person can sometimes feel the bolt coming and, if quick enough take protective action in time.
选项
答案
总之,大量充电的雨点和冰雹变成雷云中不同部分分别储有正电能和负电能的区域,形成截然相反的正负雷区。
解析
这是一个简单句,句型是:Huge masses of...become sorted into...creating...。分词词组sorted into是分词短语,作表语。creating足分词,引导结果状语。
转载请注明原文地址:https://kaotiyun.com/show/x644777K
0
考研英语一
相关试题推荐
Inthissection,youareaskedtowriteanessaybasedonthefollowinginformation.Makecommentsandexpressyourownopinion
Inthissection,youareaskedtowriteanessaybasedonthefollowinginformation.Makecommentsandexpressyourownopinion.
Inthissection,youareaskedtowriteanessaybasedonthefollowinginformation.Makecommentsandexpressyourownopinion.
Collegestudentsaremorestressedoutthaneverbefore—atleastaccordingtothelatestfindingsofalarge,nationalsurveyth
Collegestudentsaremorestressedoutthaneverbefore—atleastaccordingtothelatestfindingsofalarge,nationalsurveyth
Collegestudentsaremorestressedoutthaneverbefore—atleastaccordingtothelatestfindingsofalarge,nationalsurveyth
TelevisionpitchmenforproductslikePajamaJeansandlightedslippersoncetriedtogetviewerstoplacetheirordersbyphone
TelevisionpitchmenforproductslikePajamaJeansandlightedslippersoncetriedtogetviewerstoplacetheirordersbyphone
UncertaintythreatenstheveryexistenceofQuinhagak,Alaska.Thevillageisbuiltonalayerofpermanentlyfrozenground,and
It’saseeminglyintractabledilemma,suddenlyassalientinBerlinorTokyoasitisinWashington;Howdoyousavepeople’sec
随机试题
在刚性连接的平面仿形铣床上铣削直线成形面时,仿形杆可制成圆锥体,并与模型轮廓斜度相等,以适应不同直径的铣刀。()
领导艺术是一种客观存在,其外在形态是
引起发热的病因中.下列哪项属非感性发热
土工合成材料铺筑时正确的做法是()。
2017年4月1日,王某与丁某签订了房屋买卖合同,双方约定:王某将其房屋出售给丁某,房价120万元。丁某支付房屋价款后,王某于2017年4月10日向丁某交付了房屋,但双方没有办理产权过户登记。丁某对房屋进行了简单装修,于2017年4月20日将该房屋出租给
导游人员(),全行业通报。
下列属于邓小平同志对社会主义的本质的论断有()。
下列西方著名画家及其流派对应不正确的是()。
民族精神是社会主义核心价值体系的重要内容之一,其核心是
Imaginethatyoucouldrewindtheclock20years,andyou’re20yearsyounger.Howdoyoufeel?Well,ifyou’reatalllikethe
最新回复
(
0
)