课程咨询

SAT考试网 美本资料下载 25考试辅导 0元讲座 考前测试

新东方在线 > SAT > SAT阅读 > 正文
美国本科留学资料领取

扫码添加助教

免费领取

备考资料大礼包

扫码关注公众号

SAT阅读模拟题一篇

2013-03-13 00:00:00来源：互联网

　　下面为大家推荐的是关于SAT阅读文章模拟题，包括了文章和后面的问题，以及正确答案。新东方在线小编提醒考生，备考SAT阅读考试一定要多做一些模拟题和真题，这样才能在更短的时间内适应SAT阅读考试的形式，下面是详细内容。

　　Virtually everything astronomers known about objects

　　outside the solar system is based on the detection of

　　photons-quanta of electromagnetic radiation. Yet there

　　is another form of radiation that permeates the universe:

　　(5) neutrinos. With (as its name implies) no electric charge,

　　and negligible mass, the neutrino interacts with other

　　particles so rarely that a neutrino can cross the entire

　　universe, even traversing substantial aggregations of

　　matter, without being absorbed or even deflected. Neu-

　　(10)trinos can thus escape from regions of space where light

　　and other kinds of electromagnetic radiationare blocked

　　by matter. Furthermore, neutrinos carry with them

　　information about the site and circumstances of their

　　production: therefore, the detection of cosmic neutrinos

　　(15)could provide new information about a wide variety of

　　cosmic phenomena and about the history of the uni-

　　verse.

　　But how can scientists detect a particle that interacts

　　so infrequently with other matter? Twenty-five years

　　(20)passed between Pauli’s hypothesis that the neutrino

　　existed and its actual detection: since then virtually all

　　research with neutrinos has been with neutrinos created

　　artificially in large particle accelerators and studied

　　under neutrino microscopes. But a neutrino telescope,

　　(25) capable of detecting cosmic neutrinos, is difficult to co-

　　nstruct. No apparatus can detect neutrinos unless it is

　　extremely massive, because great mass is synonymous

　　with huge numbers of nucleons (neutrons and protons),

　　and the more massive the detector, the greater the pro-

　　(30) bability of one of its nucleon’s reacting with a neutrino.

　　In addition, the apparatus must be sufficiently shielded

　　from the interfering effects of other particles.

　　Fortunately, a group of astrophysicists has proposed

　　a means of detecting cosmic neutrinos by harnessing the

　　(35) mass of the ocean. Named DUMAND, for Deep Under-

　　water Muon and Neutrino Detector, the project calls for

　　placing an array of light sensors at a depth of five kilo-

　　meters under the ocean surface. The detecting medium is

　　the seawater itself: when a neutrino interacts with a

　　(40)particle in an atom of seawater. the result is a cascade of

　　electrically charged particles and a flash of light that can

　　be detected by the sensors. The five kilometers of sea-

　　water above the sensors will shield them from the interf-

　　ering effects of other high-energy particles raining down

　　(45) through the atmosphere.

　　The strongest motivation for the DUMAND project

　　is that it will exploit an important source of information

　　about the universe. The extension of astronomy from

　　visible light to radio waves to x-rays and gamma rays

　　(50) never failed to lead to the discovery of unusualobjects

　　such as radio galaxies, quasars, and pulsars. Each of

　　these discoveries came as a surprise. Neutrino astronomy

　　will doubtless bring its own share of surprises.

SAT水平能力测试【0元免费测试】

本文关键字: SAT阅读

上一页 1 2 下一页

美本留学资料大礼包

微信扫描二维码 回复【美本资料】

机考SATCB官方样题｜可汗练习题｜AP全科大纲/备考资料包

更多资料

添加美本助教
即可获取美本资料大礼包

美本资料大礼包
  • 1.打开手机微信【扫一扫】，识别上方二维码；
  • 2.添加【美本助教】，回复上方关键字领取学习资料。
更多>>
更多内容
课程咨询 ACT课程 SAT课程 0元公开课 水平诊断

添加美本助教号

自动领取备考资料大礼包

1. 打开手机微信【扫一扫】，识别上方二维码；
2.添加【美本助教】，自动领取留学备考资料大礼包。

可汗学院新SAT题目完整版

微信扫描下方二维码 即可获取

SAT1500分录播课（旗舰版+1对1） 托福精讲录播课（旗舰版） 托福8-10人直播VIP小班
更多>>
更多公开课>>

2025美本留学资料免费领取

微信添加美本助教

新东方美本助教
更多>>
更多资料
我要
反馈 返回
首页
课程咨询 课程中心 0元讲座 SAT模考网站 托福TPO模考网站 SAT课程

添加新东方在线美本助教号

自动领取备考资料大礼包

1. 打开手机微信【扫一扫】，识别上方二维码；
2.添加【Ella助教】，自动领取留学备考资料大礼包。

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10