日韩色综合-日韩色中色-日韩色在线-日韩色哟哟-国产ts在线视频-国产suv精品一区二区69

手機APP下載

您現在的位置: 首頁 > 雅思 > 雅思閱讀 > 雅思閱讀模擬題 > 正文

雅思閱讀實戰訓練模擬試題(八)

編輯:Rainbow ?  可可英語APP下載 |  可可官方微信:ikekenet

  Answer keys and explanations:

  1.E

  See the sentences in paragraph 1(There's a dimmer switch inside the sun that causes its brightness to rise and fall on timescales of around 100,000 years - exactly the same period as between ice ages on Earth.So says a physicist who has created a computer model of our star's core.) and para.2 (Robert Ehrlich of George Mason University in Fairfax, Virginia, modelled the effect of temperature fluctuations in the sun's interior.)

  2.A B

  See para.3:?i style='mso-bidi-font-style:normal'>Grandpierre and a collaborator, Gábor Ágoston, calculated that magnetic fields in the sun's core could produce small instabilities in the solar plasma.

  3.C

  See para.8:Edwards believes the small changes in solar heating produced by Milankovitch cycles are then amplified by feedback mechanisms on Earth.

  4.D

  See para.11:Nigel Weiss, a solar physicist at the University of Cambridge, is far from convinced.He describes Ehrlich's claims as "utterly implausible".

  5.False

  See para.5:for the past million years, ice ages have occurred roughly every 100,000 years.Before that, they occurred roughly every 41,000 years.

  6.False

  See para.7:"In Milankovitch, there is certainly no good idea why the frequency should change from one to another," ...Nor is the transition problem the only one the Milankovitch theory faces.

  7.Not Given

  See para.8:if sea ice begins to form because of a slight cooling, carbon dioxide?is locked into the ice.That weakens the greenhouse effect.(The passage doesn抰 mention anything about locking Co2 into ice artificially.)

  8.True

  See para.9:there is no lack of such mechanisms."If you add their effects together, there is more than enough feedback to make Milankovitch work,"?"The problem now is identifying which mechanisms are at work." This is why scientists like Edwards are not yet ready to give up on the current theory.

  9.True

  See the sentences in para.9 (According to Edwards, 卙e says."I can't see any way of testing [Ehrlich's] idea to see where we are in the temperature oscillation.") and para.10 (Ehrlich concedes this."If there is a way to test this theory on the sun, I can't think of one that is practical).

  10.constant

  See para.2:According to the standard view, the temperature of the sun's core is held constant by the opposing pressures of gravity and nuclear fusion.

  11.orbit

  See para.6:Most scientists believe that the ice ages are the result of subtle changes in Earth's orbit, 匛arth's orbit gradually changes shape from a circle to a slight ellipse and back again roughly every 100,000 years.

  12.instabilities

  See para.3:?i style='mso-bidi-font-style:normal'>magnetic fields in the sun's core could produce small instabilities in the solar plasma.These instabilities would induce localised oscillations in temperature.

  13.cycles

  See para.4:…allow the sun's core temperature to oscillate around its average temperature of 13.6 million kelvin in cycles lasting either 100,000 or 41,000 years.

  14.random

  See para.4:Ehrlich says that random interactions within the sun's magnetic field could flip the fluctuations from one cycle length to the other.

重點單詞   查看全部解釋    
alter ['ɔ:ltə]

想一想再看

v. 改變,更改,閹割,切除

聯想記憶
switch [switʃ]

想一想再看

n. 開關,轉換,鞭子
v. 轉換,改變,交換

 
extent [iks'tent]

想一想再看

n. 廣度,寬度,長度,大小,范圍,范圍,程度

聯想記憶
subtle ['sʌtl]

想一想再看

adj. 微妙的,敏感的,精細的,狡詐的,不明顯的

 
magnetic [mæg'netik]

想一想再看

adj. 有磁性的,有吸引力的,催眠術的

聯想記憶
academy [ə'kædəmi]

想一想再看

n. 學院,學術,學會

 
shift [ʃift]

想一想再看

n. 交換,變化,移動,接班者
v. 更替,移

 
lasting ['læstiŋ]

想一想再看

adj. 永久的,永恒的
動詞last的現在分

聯想記憶
collaborator

想一想再看

n. 合作者;勾結者;通敵者

 
radiation [.reidi'eiʃən]

想一想再看

n. 輻射,放射線

 
?
發布評論我來說2句

    最新文章

    可可英語官方微信(微信號:ikekenet)

    每天向大家推送短小精悍的英語學習資料.

    添加方式1.掃描上方可可官方微信二維碼。
    添加方式2.搜索微信號ikekenet添加即可。
    主站蜘蛛池模板: 托比·斯蒂芬斯| 《窃她》短剧全集| 日本xxx.| 无锡电视台| 西海情歌原歌词全文| 声入人心| 富贵黄金屋国语| s0hu搜狐| 美妙天堂第三季| 常虹| 远方的故乡简谱| 电影白洁少妇完整版| 《幸福花园动漫双男主》| 少女戏春潮| 281封信电视剧演员表| 读书笔记经典常谈| 性视频播放| 荒岛女儿国| 乱世危情电视剧演员表| 转正意见发言简短| 何时了却这牵挂原唱| 霹雳俏娇娃| 甄嬛传演员表| 周末的一天| 葛思然| himym| 外出韩版| 一路狂奔| ?1,| 公民的基本权利和义务教学设计| 1992年台湾叫冬梅的电影| 今晚打老虎| 薛昊婧演过的电视剧| 在路上 电影| 玫瑰的故事在线看| 马修| 在线观看韩国电影| 我是老师电影完整版| 《画江湖之不良人》| 羞羞的| 我的公公电影|