SAT官方阅读每日一练 18年5月25日

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为广大SATer带来2018年5月25日的SAT阅读每日一练，考察篇章层面的中心思想题，需要通读全文并理解作者行文架构，难度较大。配有答案，解析，众考生，慢慢操练吧。文末附2018SAT阅读题型清单。

5月25日SAT阅读每日一练

Light from distant quasars -- early galaxies that shine with tremendous

brightness -- has given researchers a new clue to the origin of vast magnetic

fields studding today's galaxies: They were running strong when the universe was

only a third of its present age.

Astronomers had observed that radio emissions from quasars tend to be angled,

or polarized, in such a way that powerful magnetic fields must have twisted

them. The greater their distance from Earth, the more polarized their light. But

researchers didn't know whether the magnetic fields were part of the quasar or

were present in galaxies encountered by quasar light as it made its journey to

our telescopes.

So a team led by astronomers from the Swiss Federal Institute of Technology

(ETH Zurich) scanned more than 70 of those quasars using the European Southern

Observatory's Very Large Telescope in Chile to look for signs of galaxies hiding

in front of the quasars. Specifically, they checked for a feature called the

magnesium(II) absorption line, a reduction in the intensity of light of a

certain wavelength, which is a commonly used indicator that gas from a

star-forming galaxy has soaked up that light.

The researchers report that light from quasars showing the magnesium(II) line

was more strongly polarized than light from other quasars in the sample. The

interpretation: that light did indeed pass through regular galaxies and that it

likely acquired its polarization in the process.

They estimated the age of the magnetic galaxies by measuring the red shift of

the absorption line—the observed reddening of light that occurs when galaxies

move rapidly apart. The typical red shift of the inferred galaxies corresponded

to an age of 5.2 billion years, study author Francesco Miniati says. Precision

measurements of the cosmic microwave background peg today's universe at 13.7

billion years old.

Which choice best characterizes the study described in the passage?

以下哪项最好的概括了本文中的研究的特征？

A.Astronomers used technology to confirm the existence and location of a

distant object.

B.Astronomers produced computer models depicting a past state.

C.Astronomers demonstrated that a generally accepted theory is flawed.

D.Astronomers drew two conclusions from a study of one phenomenon.

答案：D

解析：Choice D is correct. By identifying instances where quasar light passes

through galaxies, the astronomers were able to both determine the cause of

quasar light polarization and measure the red shift of magnesium(II) absorption

by galaxies to estimate their distances from Earth. In other words, their study

of one phenomenon led to two findings.

相关SAT阅读词汇

tend[tend]v. 趋向，易于，照料，护理 certain['sə:tn]adj. 确定的，必然的，特定的

galaxy['gæləksi]n. 银河，一群显赫之人 soaked[səukt]adj. 湿透的 动词soak的过去式和过去分词

twisted['twistid]adj. 扭曲的 v. 扭动(twist的过去式) cosmic['kɔzmik]adj.

宇宙的，广大无边的，无限的

interpretation[in.tə:pri'teiʃən]n. 解释，阐释，翻译，(艺术的)演绎

critical['kritikəl]adj. 批评的，决定性的，危险的，挑剔的

measure['meʒə]n. 措施，办法，量度，尺寸 v. 测量 observatory[əb'zə:və.tri]n.

天文台，气象台，了望台

2018年SAT阅读题型清单

对文本信息的考察，包括1文本细节的考查 2文本论据的考查 3文本传达信息的考查

对作者写作技能的考察，包括1.单词/词组/句子功能题2.文本结构题3.观点态度题4.目的题 5.论证题

综合题，包括1.双篇题2.图表题

从词汇层面看，词汇题考察的是词汇的意思和功能;

从段落层面看，考察的题目包括观点态度题，目的题，小结题，中心思想题，论证题，细节类题型等等;

从篇章层面看，同样包括细节题，态度，目的，小结，中心思想题，论证题，还包括关系题，循证题，文本结构题等。

以上就是小编为大家带来的《2018年5月18日SAT阅读每日一练》的全部内容。左手SAT真题OG，右手易伯华SAT备考干货，祝2018年与SAT一战即高分。