SAT官方阅读每日一练 18年5月25日

2018年05月25日20:43 来源：小站整理: 参与（0）阅读（5867）

摘要：5月SAT考试已结束，而下一场考试远在10月，相信很多人还在苦闷的备考期吧。由SAT考试官方出品，每天一道权威SAT阅读练习题，是放松身心的绝佳调剂资料。本文为大家带来年5月25日sat阅读练习题，属于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。每天一小道，考试更健

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;