首页
登录
职称英语
It turns out that measuring the distance to a star is an interesting problem
It turns out that measuring the distance to a star is an interesting problem
游客
2023-07-11
67
管理
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 [br] 【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://tihaiku.com/zcyy/2827224.html
相关试题推荐
Mostpeoplewhotravellongdistancescomplainofjetlag(喷气飞行时差反应).Jetlag
Mostpeoplewhotravellongdistancescomplainofjetlag(喷气飞行时差反应).Jetlag
Mostpeoplewhotravellongdistancescomplainofjetlag(喷气飞行时差反应).Jetlag
Mostpeoplewhotravellongdistancescomplainofjetlag(喷气飞行时差反应).Jetlag
Mostpeoplewhotravellongdistancescomplainofjetlag(喷气飞行时差反应).Jetlag
Mostpeoplewhotravellongdistancescomplainofjetlag(喷气飞行时差反应).Jetlag
Mostpeoplewhotravellongdistancescomplainofjetlag(喷气飞行时差反应).Jetlag
Mostpeoplewhotravellongdistancescomplainofjetlag(喷气飞行时差反应).Jetlag
Mostpeoplewhotravellongdistancescomplainofjetlag(喷气飞行时差反应).Jetlag
Mostpeoplewhotravellongdistancescomplainofjetlag(喷气飞行时差反应).Jetlag
随机试题
[originaltext]Couldyouturndownthemusicjustanotch?(A)I’msorry.Ididn’
MuslimSudanisoneoftheIslamized【B1】______regions.InEastAfricamusic
Theincident______themanagertocallameetingofthestaff.A、imposedB、enlig
下面几种识别活断层的标志中,其中能单独作为活断层的识别标志的是()。A.伴有
公司成立的日期是()。A.发起人发起的日期 B.发起人提交申请的日期 C
下列关于企业价值估值的特点,说法错误的是( )。A.整体即是各部分的简单相加
三仁汤和八正散均有的药物是A.木通B.苍术C.白术D.滑石E.厚朴
尿激酶过量引起的出血可选用的治疗药物是A、垂体后叶素 B、鱼精蛋白 C、氨甲
非手术治疗急性胰腺炎,关于饮食A.低脂、低糖流食 B.禁食不禁饮 C.低脂流
树立和落实科学发展观,同大兴求真务实之风之间的关系是()。 A.树立和落实科学
最新回复
(
0
)