<dfn id="w48us"></dfn><ul id="w48us"></ul>
  • <ul id="w48us"></ul>
  • <del id="w48us"></del>
    <ul id="w48us"></ul>
  • 托福閱讀理解練習題

    時間:2021-01-08 16:16:30 托福考試 我要投稿

    托福閱讀理解練習題

      When Jules Verne wrote Journey to the Center of the Earth in 1864, there were many conflicting theories about the nature of the Earths interior. Some geologists thought that it contained a highly compressed ball of incandescent gas, while others suspected that it consisted of separate shells, each made of a different material. Today, well over a century later, there is still little direct evidence of what lies beneath our feet. Most of our knowledge of the Earths interior comes not from mines or boreholes, but from the study of seismic waves - powerful pulses of energy released by earthquakes.

    托福閱讀理解練習題

      The way that seismic waves travel shows that the Earths interior is far from uniform. The continents and the seabed are formed by the crust - a thin sphere of relatively light, solid rock. Beneath the crust lies the mantle, a very different layer that extends approximately halfway to the Earths center. There the rock is the subject of a battle between increasing heat and growing pressure.

      In its high levels, the mantle is relatively cool; At greater depths, high temperatures make the rock behave more like a liquid than a solid. Deeper still, the pressure is even more intense, preventing the rock from melting in spite of a higher temperature.

      Beyond a depth of around 2,900 kilometers, a great change takes place and the mantle gives way to the core. Some seismic waves cannot pass through the core and others are bent by it. From this and other evidence, geologists conclude that the outer core is probably liquid, with a solid center. It is almost certainly made of iron, mixed with smaller amounts of other elements such as nickel.

      The conditions in the Earths core make it a far more alien world than space. Its solid iron heart is subjected to unimaginable pressure and has a temperature of about 9,000oF. Although scientists can speculate about its nature, neither humans nor machines will ever be able to visit it.

      1. The word "conflicting" in line 2 is closest in meaning to()

      (A) controlling

      (B) outdated

      (C) opposing

      (D) important

      2. What is todays richest source of information about the Earths interior for geologists?()

      (A) Boreholes

      (B) Shells

      (C) Seismic waves

      (D) Mines

      3. The word "There" in line 16 refers to the ()

      (A) mantle

      (B) crust

      (C) seabed

      (D) Earth‘s center.

      4. Which of the following is a primary characteristic of the Earth‘s mantle?()

      (A) Light, solid rock

      (B) Uniformity of composition

      (C) Dramatically increasing pressure

      (D) Compressed, incandescent gas

      5. The phrase "gives way to" in line 24 is closest in meaning to()

      (A) runs along

      (B) rubs against

      (C) turns into

      (D) floats on

      6. The word "it" in line 26 refers to()

      (A) mantle

      (B) core

      (C) change

      (D) depth

      7. Why does the author state in line 30-31 that the Earth‘s core is "more alien" than space?

      (A) Government funds are not available to study the Earth‘s core.

      (B) Scientists aren‘t interested in the characteristics of the Earth‘s core.

      (C) It is impossible to go to the Earth‘s core to do research.

      (D) The Earth‘s core is made of elements that are dangerous to humans.

      8. The word "speculate" in line 33 is closest in meaning to

      (A) report

      (B) learn

      (C) worry

      (D) hypothesize

    【托福閱讀理解練習題】相關文章:

    職稱英語閱讀理解練習題02-01

    職稱英語閱讀理解練習題精選09-02

    職稱英語綜合類閱讀理解練習題09-02

    職稱英語綜合類閱讀理解練習題及答案08-30

    職稱英語閱讀理解11-24

    托福閱讀筆試答題技巧06-29

    職稱英語考試綜合類閱讀理解模擬練習題09-01

    職稱英語閱讀理解及答案08-30

    職稱英語閱讀練習題08-31

    商務英語中級閱讀理解指導匯總04-28

    主站蜘蛛池模板: 亚洲AV成人无码久久精品老人| 国产精品特级毛片一区二区三区| 亚洲精品国产美女久久久| 99久久精品国内| 一本精品中文字幕在线| 国产AⅤ精品一区二区三区久久| 精品国产福利一区二区| 久久这里有精品视频| 国产成人精品福利网站在线观看 | 中文字幕在线精品视频入口一区| 国产精品 91 第一页| 国产精品成人va在线观看| 人妻少妇精品视频二区| 亚洲电影日韩精品| 国产欧美精品一区二区三区四区| 久久久91精品国产一区二区三区| 精品国产福利一区二区| 久久免费的精品国产V∧| 日韩三级精品| 久久91精品综合国产首页| 99久久精品国产一区二区蜜芽| 国内精品在线视频| 999在线视频精品免费播放观看| 久久久久久夜精品精品免费啦| 亚洲欧美日韩国产精品专区| 精品一区二区三区免费观看| 精品偷自拍另类在线观看丰满白嫩大屁股ass | 999国产精品色在线播放| 97精品国产一区二区三区| 欧美肥屁VIDEOSSEX精品| 亚洲欧美日韩国产精品| 一本精品中文字幕在线| 日韩一区精品视频一区二区| 中文字幕精品无码一区二区三区 | 99精品视频在线观看免费| 国产精品无码a∨精品| 精品亚洲国产成AV人片传媒| 精品一区二区三区自拍图片区| 国产午夜福利精品久久2021 | 亚洲国产精品嫩草影院久久 | 区亚洲欧美一级久久精品亚洲精品成人网久久久久 |