2017年4月13日每日一题

2017-04-19 10:49:38 作者:无 来源:匿名 次数:711

0
导读:
免费网络课程:环球教育-托福网络课程 永久免费 抢预约 环球托福强化班

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。下面是环球北美考试院小编为您整理的SAT题目,让我们一起来看一看这道题目吧。

  Critical Reading>Select an Answer

  Building a road through wilderness certainly has avisible impact on local flora and fauna—you'rephysically paving over a slice of what was oncehabitat. But roads have less obvious effects, too.Like the introduction of traffic noise, which also takesa toll. "You can see an oil spill but you can't see a traffic noise spill. So convincing people thatit's important is a little more difficult," said Heidi Ware.

  Ware is an ornithologist at the Intermountain Bird Observatory in Boise, Idaho. She and hercolleagues studied the reactions by birds to the sounds of vehicles. And they did it withoutpaving the great outdoors. Instead, they mounted 15 pairs of speakers on Douglas fir trees,along a ridge near Boise, and played traffic noise. They thus created what they call a "phantomroad" through the wilderness, which boosted local noise levels 10 decibels higher than those inthe surrounding forest.

  Turns out just the sounds of traffic scared away a third of the area's usual avian visitors, andcut species diversity too. And birds of multiple species were not able to pack on as much fatto fuel their migrations, when they were forced to dine to the soundtrack of traffic.

  Follow-up experiments in the lab found that, when it's noisy, birds spend a lot less time headdown, pecking at food, and a lot more time scanning their surroundings.

  Ware says Yosemite, Glacier and Rocky Mountain National Parks all have roads that are busyenough to produce these effects. And, short of closing park roads to traffic, she says thingslike rubberized asphalt and lower speed limits could help cut the noise. "Glacier National Park isgoing to put up signs, that instead of showing your speed and preventing people fromspeeding, it's going to show how loud their car is on the road." Which, hopefully, will continueto encourage wilderness lovers to leave no trace—visible or audible.

  The primary purpose of the second paragraph is to ____

  (A) establish the credentials of researchers who conducted an experiment.

  (B) present a hypothesis a group of researchers set out to investigate.

  (C) identify the locations of the sites where a study was conducted.

  (D) outline the methodology researchers used in a study.

  环球北美考试院提醒各位参加准备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:D

  解析:

  Choice D is the best answer. In the second paragraph the author's main focus is on outlining the methods Ware and her colleagues used in their study. The author explains that the researchers used speakers to simulate a road that raised noise levels by 10 decibels in order to study birds' reactions to the noise.

相关阅读

北美一线名师规划预约

标签:

推荐阅读

托福考试辅导免费试听
课程名称 讲师 优惠价 试听 报名
托福VIP预备3-6人小班 院长领衔授课 ¥9800.00元
托福基础强化3-6人小班 李老师 ¥40800.00元
托福基础联程6人封闭班 李老师 ¥52800.00元
托福全封闭院长特训VIP班 张老师 ¥18800.00元
托福名师速成25人小班 赵老师 ¥3280.00元
托福基础强化联程25人班 张老师 ¥12180.00元
托福模考精讲冲刺6人班 李老师 ¥1880.00元

编辑推荐

编辑推荐

搜课热报
  • ACT SUCCESS体系V3班
  • 报名
  • GMAT目标700分V3班
  • 报名
  • GRE目标320分V3班
  • 报名
  • SAT冲1400分预备3人班
  • 报名
  • SAT冲1400分预备3人班
  • 报名
精彩课程
行业圈
趋势报告 
  • 2017年SSAT考试现状了解及正确对待ssat课程SSAT对于申请美国高中留学的学生来讲应该不陌生,SSAT全称是SecondarySchoolAdmissionTest,中文意思为美国中学入学考试,相当于中国的中考。是所有非北美学生进入美国高中的必由之路。

关于我们 | 校区查询 | 网上报名流程 | 汇款报名流程 | 退款制度 | 现场报名流程 | 问题与解答 | 网站导航