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
2024-02-12
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/3443487.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
Thewholecountrywasin______overtheresultoftheelections.(2014-77)A、suspen
下列一般不能作为肿瘤显像剂的是A.-DMSA B.-GH C.-MIBI
针对信息系统,安全可以划分为以下四个层次:设备安全、数据安全、内容安全、行为安全
A.8~16B.15~18C.7~9D.13~16E.3~8增溶剂的HLB值
根据《建筑市场诚信行为信息管理办法》(建市【2007】9号),不良行为记录信息公
自我满足的主观感觉,是指A.休息 B.安详 C.睡眠 D.放松 E.舒适
民法是调整平等的民事主体之间( )法律规范的总称。A.人身关系 B.财产关系
按照维果茨基的观点,学习的最佳期限的前提和条件包括()。 (A)以个体的发育
下列属于FIDIC道德准则的是()。 A.服务性B.科学性
某企业年初借款2000万元,按年复利计息,年利率为8%。第3年末还款1200万元
最新回复
(
0
)