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
38
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] 【S6】
选项
答案
H
解析
形容词作后置定语,在H)和A)之间选择。H)“可利用的”,A)“可能的”,再结合后面的介词to,H)可搭配, A)后需接of。
转载请注明原文地址:http://tihaiku.com/zcyy/3443486.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
Variations
关于国家对书号、刊号管理的规定,说法正确的有().A.同一种图书的不同装帧
英才高等教育阶段,高等教育的支撑者是()。A.个人 B.国家 C.国家和个
甲公司承担了一项为宇航系统配套生产高性能嵌入式计算机系统的任务,用户要求该系统要
古希腊希波克拉底在《希波克拉底誓言》中要求自己:"无论至于何处,遇男或父,贵人及
A.心B.肺C.肾D.肝E.脾"君主之官"是指
根据下列资料回答问题。 2009年1-3月,入境旅游的日本游客人数约为(
触觉语颤增强见于 A.严重胸膜肥厚B.肺泡含气量减少 C.肺泡含气量增加
下列指标中,属于盈利能力分析的动态指标的是()。A.总投资收益率 B.内部收益
实施产业政策的贸易保护措施有()。A.减免税费 B.进口限制 C.技术引进限
最新回复
(
0
)