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
专升本
It seems to shine unchangingly, pouring out a constant light year after year. But the sun may not be nearly so stable as we supp
It seems to shine unchangingly, pouring out a constant light year after year. But the sun may not be nearly so stable as we supp
admin
2012-08-05
43
问题
It seems to shine unchangingly, pouring out a constant light year after year. But the sun may not be nearly so stable as we suppose, It is now thought to move quickly and irregularly and change in long-term cycles, growing dimmer and then brighter with each passing year. Some even fear that its frequent changing behavior would have a great influence on the Earth’s climate.
The source of the sun’s inconstancy is magnetism. Professor William Livingston has developed new theories about its magnetic nature.
"We don’t yet know what causes sun spots, "he says, "but we now think they’re areas of high-level magnetism that come up from the sun’s interior. So strong is their magnetic pull that the highly ionized gas nearby is not able to transmit energy out." As a result these areas send out less heat and light and thus appear from Earth to be almost dark irregular surface patches.
Sun spot activity generally fluctuates in steady, 11-year cycled. Scientists have long formed the opinion that as the size and number of sun spots increased, the overall energy sent out by the sun would decrease. Indeed, recent studies confirmed it, revealing that during peak periods of sun spot activity, the Earth experiences a small drop that can be seen clearly in received solar energy.
Could such a small drop in energy have an effect here on earth? Perhaps some scientists think the world temperature could fall by as much as 0.2 during periods of high solar magnetism... enough to cause significant fluctuations in weather patterns.
Which of following is the best title for the passage? ______
选项
A、Fluctuations in Weather Patterns.
B、Magnetism and the Sun Spots.
C、The Size and Number about the Earth’s.
D、Livingston’s New Theory about the Earth’s Climate.
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/P6eC777K
本试题收录于:
英语题库成考专升本分类
0
英语
成考专升本
相关试题推荐
Peopledonotanalyseeveryproblemtheymeet.Sometimestheytrytorememberasolutionfromthelasttimetheyhada【C1】______
Peopledonotanalyseeveryproblemtheymeet.Sometimestheytrytorememberasolutionfromthelasttimetheyhada【C1】______
Theengineerandworkerreferredto______todesignsomething.
Marywasthe______ofthe______studentsclimbeduptothetopofthehill.
Itwasnotaseriousillness,andshesoon______it.
Shoppingforclothesisnotthe【61】experienceforamanasitisforawoman.Amangoesshoppingbecauseheneedssomething.Hi
Somepeoplegiveuptryingtolearnaforeignlanguage.Itcanseemtoomuchlikehardwork.Buttheproblemcomeswhentheygo
Todiscoverwhetherbeescanseecolors,thefollowingexperimentissetup.Atableisputinagarden,andonthetableisap
Thetownwasnolongerthesleepylittlevillage______.
LetmetellyouastoryaboutBerbandMildCarbridge,whousedtobevery【21】Forexample,Mildwouldforgetto【22】dinner,orBe
随机试题
富有竞争性、敌对性,有很强的时间紧迫感,这主要是()的特点。
A.大汗淋漓,四肢厥冷,面色苍白,神情淡漠,呼吸微弱,脉微欲绝B.形体消瘦,五心烦热,颧红盗汗,口燥咽干,皮肤干燥,脉象细数C.身热大汗,汗热质黏,面色潮红,躁扰不安,渴喜冷饮,脉细数疾D.高热肢厥,神识昏沉,胸腹灼热,口渴喜饮,面色紫暗,脉沉有力
女,44岁。左乳房外上象限4cm×3cm肿块,距乳头距离5cm,可推动,但是患者双手叉腰时肿块活动度明显受限,左腋窝未扪及肿大淋巴结。该患者若确诊为乳腺癌,最佳的手术方式是()
根据《中华人民共和国广告法》,可做广告的药品是
设直线的方程为,则直线()。
建筑工程施工总承包二级企业的技术负责人除满足工作经历的要求外,应具有结构工程专业()执业资格。
当钢筋混凝土构件按最小配筋率配筋时,其钢筋代换的原则是()代换。
我国的人民币制度属于()。
关于稳定型心绞痛的发病机制。下列哪一种提法正确
下列关于无线局域网802.1l标准的描述中,错误的是()。
最新回复
(
0
)