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 turns out that measuring the distance to a star is an interesting problem! Astronomers have【S1】______up with two different te
It turns out that measuring the distance to a star is an interesting problem! Astronomers have【S1】______up with two different te
admin
2013-06-17
44
问题
It turns out that measuring the distance to a star is an interesting problem! Astronomers have【S1】______up with two different techniques to estimate how far away any given star is.
The first【S2】______uses triangulation(三角测量). The Earth’s【S3】______around the sun has a diameter of about 186 million miles(300 million kilometers ). By looking at a star one day and then looking at it again 6 months later, an astronomer can see a【S4】______in the viewing angle for the star. With a little trigonometry(三角学), the different angles yield a distance. This technique【S5】______for stars within about 400 light years of earth.
There is no direct method currently【S6】______to measure the distance to stars【S7】______than 400 light years from Earth, so astronomers instead use brightness measurements. It turns out that a star’s color spectrum is a good indication of its actual brightness. The【S8】______between color and brightness was proven using the several thousand stars close enough to earth to have their distances【S9】______directly. Astronomers can therefore look at a distant star and determine its color spectrum. From the color, they can determine the star’s actual brightness. By knowing the actual brightness and comparing it to the【S10】______brightness seen from Earth(that is, by looking at how dim the star has become once its light reaches Earth), they can determine the distance to the star.
A)capable B)works
C)put D)difference
E)track F)come
G)relationship H)available
I)technique J)measured
K)nearer L)apparent
M)orbit N)applies
O)farther
【S10】
选项
答案
L
解析
根据句意判断,本句前半部分使用了“实际亮度(actual bright- ness)”,后面填入的词应该是“actual”的比较对象,综观各选项,L)apparent(表面的)符合题意。
转载请注明原文地址:https://jikaoti.com/ti/6boFFFFM
0
大学英语四级
相关试题推荐
Manyteachersbelievethattheresponsibilitiesforlearningliewiththestudents.【C1】______alongreadingassignmentisgiven,
Theprincipaltechniqueincurrentuseforteachingreadingattheintermediatestageisthatofsupplementary,gradedreaders.
【S1】【S9】
A、Howtosucceedincareer.B、Howtoresolvepersonalproblems.C、Howtodealwithbusiness.D、Howtomakemoney.BWhattypeof
Mostpeoplewhotravellongdistancescomplainofjetlag(喷气飞行时差反应).Jetlagmakesbusinesstravelerslessproductiveandmorepr
Theycallthemthenewbreadearners.Theyarewomen,andtheyaresettotakeover.Womenarebeginningtorise【S1】______to
Beforethe1850’s,theUnitedStateshadanumberofsmallcolleges,mostofthemdatingfromcolonialdays.Theyweresmall,ch
Dolphinshavethepowertomakepeoplefeelbetterjustbytheirpresence,accordingtoaleadingmarinebiologist."Icanno
A、Inaregistryoffice.B、Inachurch.C、Byapublicannouncement.D、Secretlywiththecompanyoftwopassers-by.B文章中介绍了英国人结婚的
A、Theirsimilarsocialstatus.B、Theirinterdependence.C、Theircommoninterest.D、Theiridenticalcharacter.C短文中提到,艾琳和帕特都喜欢去剧院
随机试题
会计师事务所应当倡导与培育企业内部文化的导向是()
男性,85岁。因咳嗽发热1周,昏迷5小时入院。高血压史30余年,无明确糖尿病史。体检:形体消瘦,深度昏迷、脱水貌,四肢厥冷,双侧中、下肺可闻湿啰音。血压10.6/5.3kPa(80/40mmHg),心率124次/min,心律不齐,肝脏未及,双下肢不肿。尿糖
女性,19岁,大学一年级新生,从山区来到城市上学:自述不能见马路上的汽车,当汽车经过时,总感觉汽车很可能撞上自己,因此十分恐惧,来心理门诊就诊,最好采用的方法是
路面的结构层次包括()。
背景资料:某施工单位承接了一条二级公路的隧道施工项目,该隧道主要穿越砂层泥岩和砂岩,岩层节理、裂隙发育,富含裂隙水。隧道全长800m,设计净高5m,净宽12m,为单洞双向行驶的两车道隧道。施工单位针对该项目编制了专项施工方案,其中包括工
水文地质条件复杂、极复杂矿井应当()至少开展一次水害隐患排查及治理活动。
小吴大学本科刚毕业,若毕业时找工作,可以找到一个年薪8万元的工作,若继续攻读硕士学位,预计2年后可找到年薪10万元的工作,研究生期间每年学费1万元,假设毕业后可工作30年,如果考虑货币的时间价值,小吴攻读高学历的年报酬率为( )。
普通中小学的双重任务是()。
简述我国登记离婚必须符合的条件。
PASSAGEFOURWhatdoestheauthormainlydiscussinthispassage?
最新回复
(
0
)