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
外语
A、They were created by Galileo in 1610. B、They are electrical in nature. C、They are created by nature. D、They are there for almo
A、They were created by Galileo in 1610. B、They are electrical in nature. C、They are created by nature. D、They are there for almo
admin
2010-04-30
28
问题
Astronomers are still learning about sunspots and about their effects on us, but believe that the spots on the sun, which were first observed through a telescope by Galileo in 1610, are electrical in nature.
Sunspots vary in size from what appear to be small specks on the sun’s surface, to at least 90,000 miles long, and 200,000 miles in length, and are visible on most clear days.
When sunspots release their electrical energy, they shoot beams of negatively charged electrons into space, some of which escape into the Earth’s atmosphere. These electrons create electrical effects, such as the aurora borealis, or Northern Lights, cause the disruption of radio transmissions, and increase the amount of ozone in the upper atmosphere. The additional ozone may absorb more than the usual amount of the sun’s heat, which in turn may affect our weather.
The sunspot cycle, is a recurring 11-year period over which the number of sunspots fluctuates and corresponds to the number of sun flares. An increase in the number of sun flares leads to an increase in the number of sunspots, and a decrease in the number of sun flares leads to a decrease in the number of sunspots,
Records of sunspots have only been kept for the last 100 years or so, leaving astronomers with little to back their research and much yet to discover about this phenomenon.
选项
A、They were created by Galileo in 1610.
B、They are electrical in nature.
C、They are created by nature.
D、They are there for almost thousands of years.
答案
B
解析
转载请注明原文地址:https://jikaoti.com/ti/RJYMFFFM
0
大学英语六级
相关试题推荐
A、Atclass.B、Backathome.C、Atwork.D、Inhospital.DW:WillJohnbecomingtoclassthisafternoon?M:He’ssupposedto.But
Whichofthefollowingcanreflecttheever-changingethnicstructureofAmerica?WhoplayprofessionalfootballintheUnited
A、Geology.B、Music.C、Medical.D、Mathematics.BWhatwasthewoman’smajorasanundergraduatestudent?
Towardstherolethescientificestablishmentisplayingtheauthor’sattitudeisthatof______.Theauthorimpliesthattheg
Chinahasoutlinedanewapproachtoforeigninvestment,withplannerssayingtheywillnowfocuslessonattractinglargeamoun
A、Itwasprettygood.B、Itwasratherdull.C、Itwasnotwellorganized.D、Itwasattendedbymanypeople.CW:Let’stalkaboutt
A、Americanindustrialists.B、Frencheconomists.C、Internationalleaders.D、CivilWarveterans.BWhofirstusedthemottolaisser
Forthispart,youareallowed30minutestowriteacompositiononthetopicHowtoSolvetheHousingProbleminBigCities?Yo
ManyleadingscientistssownthroughtheyearsfromGalileotoEinsteinhavebeendeeplyreligious.Theyhavebeenintriguedby
随机试题
智力的二因素论,将智力分为普通因素和特殊因素,首先提出这一理论的是【】
红细胞悬浮稳定性差会导致
A、枸杞子B、五倍子C、莲子D、诃子E、金樱子具有益肾固精,养心安神功效的药物是
散射线主要产生于
所有会计账户都是根据会计科目开设的。()
资本家获取剩余价值有两种方法,绝对剩余价值和相对剩余价值,它们的区别表现在()。
被称为“百草之王”的名贵药材是()。
张飞和李柏今年都报考了MBA,关于他们的考试有如下四个断言:(1)他们俩人至少有一个考上;(2)张飞并不必然考上;(3)李柏确实考上了;(4)并非张飞可能没考上。最后录取结果表明:这四个断言中有两个是真的,
以下针对全局变量的叙述错误的是()。
AFord’sFollowersBTheAssemblyLineCFord’sGreatDreamDTheEstablishmentoftheCompanyEFord’sBiggestContributio
最新回复
(
0
)