2017年11月21日SAT考试每日一题(阅读).

　　为了让我们更好的适应SAT考试，SAT考试官网每天都会有SAT官方每日一题，下面是澳际小编为您整理的2016年11月21日SAT题目，是阅读题，让我们一起来看一看这道题目吧。

　　Critical Reading>Select an Answer

　　Light from distant quasars—early galaxies that shinewith tremendous brightness—has given researchersa new clue to the origin of vast magnetic fieldsstudding today's galaxies: They were running strongwhen the universe was only a third of its presentage.

　　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 theirdistance from Earth, the more polarized their light. But researchers didn't know whether themagnetic fields were part of the quasar or were present in galaxies encountered by quasar lightas 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 VeryLarge 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 theintensity of light of a certain wavelength, which is a commonly used indicator that gas froma star-forming galaxy has soaked up that light.

　　The researchers report that light from quasars showing the magnesium(II) line was morestrongly polarized than light from other quasars in the sample. The interpretation: that lightdid indeed pass through regular galaxies and that it likely acquired its polarization in theprocess.

　　They estimated the age of the magnetic galaxies by measuring the red shift of the absorptionline—the observed reddening of light that occurs when galaxies move rapidly apart. The typicalred shift of the inferred galaxies corresponded to an age of 5.2 billion years, study authorFrancesco Miniati says. Precision measurements of the cosmic microwave background pegtoday's universe at 13.7 billion years old.

　　Which of the following, if true, would undermine the interpretation offered by theresearchers in the fourth paragraph?

　　(A) Another team of astronomers measures the red shifts of magnesium(II) absorption linesand concludes that the galaxies formed when the universe was less than 5.2 billion years old.

　　(B) A new study determines that quasars that are not near star-forming galaxies have highlevels of polarized light.

　　(C) A group of astronomers publishes a report that suggests the number of known quasars inthe universe is higher than previously documented.

　　(D) A massive galaxy that causes strongly polarized light is found to be situated in front of aquasar.

　　澳际培训提醒各位参加准备sat考试的同学，仔细看完以上的sat考试官网题目，然后再看下面的SAT题目答案更有效哦。

　　答案：B

　　解析：

　　Choice B is the best answer. The fourth paragraph indicates that the researchers concluded that light from quasars with magnesium(II) absorption lines acquired strong polarization as a result of passing through galaxies. This interpretation would be most weakened by a study that found that light from a quasar was strongly polarized without having passed through a galaxy near the quasar.

　　以上就是澳际小编为根据SAT考试官网最新信息，为您整理的2016年11月21日SAT题目，目的是为了让我们更好的适应SAT考试，如果在备考过程中遇到任何问题，欢迎随时咨询澳际培训，为您提供最专业、最全面的解答。

　　SAT金牌一对一

　　想要快速提分，一对一最适合你

　　1一对一会根据你的实际情况制定计划

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　　4一对一授课的吸收率是大班课的5倍

　　5教学更具交流性，课堂上可随时反馈

　　6每学科教师辅导+专门学习顾问+助教

　　数据证明一对一授课的吸收率，是大班课的5倍!

　　澳际标准化SAT课程教学体系——平均教龄5年以澳际师研发，历经8年SAT考试实战验证，数据证明一对一授课的吸收率，一对一授课效率是小班授课的2~3倍，是大班课的5倍，最大限度保证学习效果，家长要做的就是放心把孩子交给澳际。

　　一对一授课能为你做什么?

　　一对一的授课非常适合想要快速提分的学生，它的吸收率比班课更高，排课更为灵活，这意味着用更短的时间达成目标。尤其是想要冲击高分的学生，很难在约定俗成的班课上有针对性地弥补短板。老师在一对一的形式下，也能更好地照顾到学生的需求。以作文批改为例，如果是班课就难以实现，因为数量太多了，费时费力。但在澳际的一对一授课中，每位学生都能获得经老师2次修改成文的文章4-6篇。想在25分钟内流畅地写出500词以上的文章，没有这个打磨的过程，谈何容易。

　　自由安排上课时间，网络课堂克服地理限制

　　SAT一对一课程

　　课程介绍：SAT资深教师针对考点重点点拨，从基础到强化全面提高

　　课程教材：SAT官方指南、SAT历年考试真题集、澳际名师内部讲义