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
20
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] 【S7】
选项
答案
O
解析
该题后有“than”,说明前面要填比较级,在O)farther和K)nearer之间选择,根据语境,这里是“更远”符合逻辑。
转载请注明原文地址:https://tihaiku.com/zcyy/2827221.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
Thenewstudentdarenotspeakinclass.Nor______toraiseanyquestions.A、h
WhenIlookeddownandsawhowfarIhadtojump,mycourage______me.A、passedB、
Americancitiesare【C1】______othercitiesaroundtheworld.Ineverycou
患者,女,20岁,未婚。发现下腹部肿块1年,突发下腹部疼痛伴恶心、呕吐6小时。肛
发展适宜性原则是当今幼教界提倡的一种教育理念,提出这一教育原则的是( )。
儿童的发展是通过( )。A.对物体的操作和与人的交往而发展的 B.聆听教师讲
下列因为全球气候变暖而成为濒危景点的是()。 ①乞力马扎罗山雪峰②澳大利亚
下列关于减少税收对经济的影响说法正确的是( )。 Ⅰ.可以增加投资需求和消费
Thechangeinthatvillagewasmiraculou
在证券公司的核心业务中,因要辅助客户物色目标公司、设计并购方案而被视为“财力和智
最新回复
(
0
)