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
27
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 the following statements is supported by the passage? ______
选项
A、The sun shines constantly and gives out the same amount of energy every year.
B、The cause of the sun’s fluctuations is its loss of energy with each passing year.
C、It is sure that the energy sent out by the sun will drop when more sun spots appear.
D、Fluctuations in weather patterns are the results of the pull of gravity.
答案
C
解析
转载请注明原文地址:https://jikaoti.com/ti/n5uGFFFM
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】______
Mychest______whenImakeadeepbreath,doctor.
Hospitalstaffburstintocheersafterdoctorscompleteda-houroperationtohave______one-year-oldtwinsatthehead.
Ihavenodoubt_____weshallbeabletodosomethingforyou.
Shoppingforclothesisnotthe【61】experienceforamanasitisforawoman.Amangoesshoppingbecauseheneedssomething.Hi
Shoppingforclothesisnotthe【61】experienceforamanasitisforawoman.Amangoesshoppingbecauseheneedssomething.Hi
Theseareusefultomaninthreeimportantways:Theyprovidehimwithwoodandotherproducts;Theygivehimshadeandtheyhel
Whenthetemperatureofaliquidisraisedenough,theliquidboils.Thismeansthatbubblesofvapor,containingmillionsofmo
LetmetellyouastoryaboutBerbandMildCarbridge,whousedtobevery【21】Forexample,Mildwouldforgetto【22】dinner,orBe
随机试题
患者,女,18岁。疲乏,月经量多半年。面色苍白,皮肤可见散在出血点。检查:肝、脾肋缘下未触及,血红蛋白86g/L,白细胞2.8×109/L,血小板4.5×109/L,骨髓增生低下,未见巨核细胞。其诊断是()
A、B两家施工单位以联合承包方式承揽某建设工程的施工任务。则下列说法不符合我国《建筑法》规定的是()。
下列交易或事项产生的现金流量中,属于投资活动产生的现金流量的有()。
ItwasacoldJanuaryin1925inNorthAlaska.Thetownwascutofffromtherestoftheworldduetoheavysnow.Onthe20th
学校教育内容的特点是()。①明确的目的性和充分的预定性②高度的信息含量和严密的逻辑性③价值的全面性④高度的科学性和全面的教育性
A、12B、14C、16D、20C此题答案为C。从分析中间数字的特征入手,中间数字均为合数,说明可能是由加减运算或者乘除运算得到。第一个三角形的周围数字相加难以得到26,因此考虑26是由乘除运算得到。对26进行因式分解,26=2×13,易得到13=
乐于自嘲是真正自信的人。与能温和地接受他人的取笑相比,乐于自嘲者更加自信。由此可以推出:
Windows系统的用户管理配置中,有多项安全设置,其中密码和账户锁定安全选项设置属于(49)________。
帧是数据通信中的最小语义单位,根据信号内容的不同又可分为命令帧、响应帧和【 】帧。
What’sDavid’spresentjob?
最新回复
(
0
)