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 【B1】______of the physical and chemical nature of life must begin; not on the Earth,: but in the Sum In fact, it is. at the Sun
A 【B1】______of the physical and chemical nature of life must begin; not on the Earth,: but in the Sum In fact, it is. at the Sun
admin
2013-01-20
25
问题
A 【B1】______of the physical and chemical nature of life must begin; not on the Earth,: but in the Sum In fact, it is. at the Sun% very center. It is here that is to be found the source of the energy that the Sun【B2】______pours out into space as light and heat. This energy is liberated at the center of the Sun as billions upon billions of nuclei of【B3】______atoms collide with each other and fuse together to form nuclei of helium(氦). And, in doing so, it【B4】______some of the energy that is stored in the nuclei of atoms. The output of light and heat of the Sun requires that some 600 million tons of hydrogen be【B5】______into helium in the Sun every second. This the Sun has been doing for several thousands of millions of years.
The nuclear energy is released at the Sun’s center as high-energy gamma【B6】______, a form of electro-magnetic radiation like light and radio waves, only of very much shorter【B7】______. This gamma radiation is【B8】______by atoms inside the Sun, to be re-emitted at slightly longer wavelengths. This radiation, in its turn, is absorbed and reemitted.【B9】______, it passes through the X-ray part of the spectrum(频谱), eventually becoming light. At this stage, it has reached what we call the solar surface and can escape into space,【B10】______. A very small fraction of the Sun’s light and heat is emitted in such directions【B11】______.
【B4】
选项
答案
releases
解析
转载请注明原文地址:https://kaotiyun.com/show/NLu7777K
0
大学英语四级
相关试题推荐
A、StanfordUniversity.B、NebraskaUniversity.C、OhioStateUniversity.D、TheUniversityofChicago.A选项均为大学名称,考生需在听音时捕捉关键信息词对号入座
Soonafterstartinghisjobassuperintendent(监管人)oftheMemphis,Term.,publicschools,KrinerCashorderedanassessmentof
A、Onaplane.B、Atapostoffice.C、Atahotelreception.D、Atatravelagency.D场景推断题。女士问男士有什么可以帮忙的,男士说自己将要去悉尼度假,由于这是他第一次出国旅行,因
A、Whypeopleareunwillingtooffermoney.B、Howtoarrangethebudgetintheirfamily.C、Whatadifficultsituationthechurch
Americansareproudoftheirvarietyandindividuality,yettheyloveandrespectfewthingsmorethanauniform,whetheritis
Tell-AllGenerationLearnstoKeepThingsOfflineMinLiu,a21-year-oldliberalartsstudentattheNewSchoolinNewYork
PoorpeoplehaveIQ’ssignificantlylowerthanthoseofrichpeople.The【S1】______traditionalwisdomhasbeenthatthisisinla
A、Becausepeoplewhoeatspoiledfoodmaygetsick.B、Becausefarmershavetothrowawayspoiledproducts.C、Becausefarmershav
It’stemptingtospendslowworkdaysthisholidayseasonshoppingforgiftsonline,butemployeesshouldthinktwice.Inarece
A、Iteliminatedmanyfactoryjobs.B、Itallowedworkerstolivefarfromtheirjobs:C、Itgaveworkersopportunityforbettertr
随机试题
某外源化学物的蓄积系数K>5时,表明该物质的蓄积毒性为
小柴胡汤的加减运用,不正确的是
下列选项中,关于利润表会计期间的表述,正确的是()。
境内某企业从香港进口日本产抛光设备100台,成交价格为CIF杭州1000美元/台。设外汇折算价1美元=7元人民币,进口关税最惠国税率为10%,普通税率为30%,计算应征进口税额为:
甲股份有限公司、乙股份有限公司(本题简称甲公司、乙公司)均为上市公司,2016年至2018年发生的相关交易或事项如下:(1)2016年1月1日,甲公司以3200万元取得A公司60%的股权,款项以银行存款支付,另支付审计费5万元。A公司2016年1月1日
下列属于宏观经济政策对经济发展影响的有()。
下列选项中,没有歧义的一项是()。
下列名酒中,属于酱香型的是()。
以下说法正确的是()。
社会工作者高玲在解决李大妈遇到的迫切问题时,应在()方面提供具体的援助。
最新回复
(
0
)