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
It was not "the comet of the century" experts predicted it might be. However, Kohoutek has provided a bonanza of scientific info
It was not "the comet of the century" experts predicted it might be. However, Kohoutek has provided a bonanza of scientific info
admin
2010-07-06
22
问题
It was not "the comet of the century" experts predicted it might be. However, Kohoutek has provided a bonanza of scientific information. It was first spotted 370 million miles from Earth, by an astronomer who was searching the sky for asteroids, and after whom the comet was named. Scientists who tracked Kohoutek the ten months before it passed the Earth predicted the comet would be a brilliant spectacle. But Kohoutek fell short of these predictions, disappointing millions of amateur sky watchers, when it proved too pale to be seen with the unaided eye. Researchers were very happy nonetheless with the new information they were able to glean from their investigation of file comet. Perhaps the most significant discovery was the identification of two important chemical compounds -- methyl cyanide and hydrogen cyanide -- never before seen in comets, but found it the far reaches of interstellar space. This discovery revealed new clues about the origin of comets. Most astronomers agree that comets are primordial remnants from the formation of the solar system, but whether they were born between Jupiter and Neptune or much farther out toward interstellar space has been the subject of much debate. If compounds no more complex than ammonia and methane, key components of Jupiter, were seen in comets, it would suggest that comets form within the planetary orbits. But more complex compounds, such as the methyl cyanide found in Kohoutek, point to formation far beyond the planets; there the deep freeze of space has kept them unchanged.
According to the passage, what is one major component of Jupiter?
选项
A、Hydrogen cyanide.
B、Methyl cyanide.
C、Hydrogen.
D、Ammonia.
答案
D
解析
文章倒数第四行:If compounds no more complex than ammonia and methane, key components of Jupiter, were seen in comets.如果混合物只是氮和甲烷,那么在慧星上发现木星的主要元素是氮和甲烷。
转载请注明原文地址:https://kaotiyun.com/show/EIDd777K
本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
0
公共英语四级笔试
公共英语(PETS)
相关试题推荐
Fordecades,postersdepictingrabbitswithinflamed,reddenedeyessymbolizedcampaignsagainstthetestingofcosmeticsonani
YouwillhearaninterviewwithProf.JesseAusubelabouthisoptimisticattitudestowardsenvironmentalissuestoday.Asyouli
YouwillhearaninterviewwithProf.JesseAusubelabouthisoptimisticattitudestowardsenvironmentalissuestoday.Asyouli
Agingbabyboomersaredeterminedtofighttheagingprocess.Theyspendmillionsofdollarsayearon【C1】______theyperceiveas
Payandproductivity,itisgenerallyassumed,shouldberelated.Buttherelationshipseemstoweaken【C1】______peoplegetolder
Payandproductivity,itisgenerallyassumed,shouldberelated.Buttherelationshipseemstoweaken【C1】______peoplegetolder
Thespeechismainlyabouttheorganizationofthecompany.
Thespeechismainlyabouttheorganizationofthecompany.
Throughouthistorytherehavebeenmanyunusualtaxesleviedonsuchthingsashats,Beds,Baths,marriages,andfunerals.Aton
Whywastheparrotregardedasunique?
随机试题
急腹症在诊断未明了时,禁忌使用热疗的原因是
阅读材料,根据要求完成教学设计。“获取网络信息的策略和技巧”模块强调学生在经历信息获取的过程中,掌握信息获取的策略与方法。教材着重要求学生学习网络信息检索的一般方法,归纳网络搜索引擎的使用技巧,这将为本模块其他内容和选修模块的继续学习奠定重要基础。本节学
根据财务制度和会计制度的规定,采用分期付款方式销售的开发产品,每期实现的销售收入,应按当期收到的价款或按合同约定的当期收价款确定。()
影响材料导热系数的主要因素有()。
库存现金限额由开户银行根据开户单位5~7天的日常零星开支所需要的现金核定。()
一般纳税人销售软件产品并随同销售一并收取的软件安装费、维护费和培训费等收入,应按照增值税混合销售的规定征收增值税,并可享受软件产品增值税即征即退政策。()
中小企业是我国最具活力的企业群体,在GDP中比重约为60%,提供了约70%的城镇就业岗位,但受需求不足、成本上升等不利因素的影响,中小企业的发展遇到较大困难,为此国家加大了对中小企业的扶持力度,这有利于()。
某地大规模爆发甲流,你被要求处理此事。你怎么做?
某学生努力学习数学,只是为了取悦数学老师,此时学生的学习动机类型是()。
Lookatthechartsbelow.Itshowsroadaccidentfiguresindifferentcountriesfrom1992to1999.Whichfiguredoeseachsenten
最新回复
(
0
)