The star sat in front of all the reporters at the press conference, _____ to answer different kinds of questions.   

  A. to be prepared B. to be preparing

C. having prepared D. prepared

練習(xí)冊系列答案
相關(guān)習(xí)題

科目：高中英語 來源： 題型：閱讀理解

If you dream of going someplace warm to escape the cold winter weather,a trip to a recently discovered planet would certainly warm you right up.The planet,named

OGLE-TR-56b,has temperatures of more than 3,000°F.“This is the hottest planet we know about,”says Dr Dimitar Sasselov,a scientist who led the discovery team.“It is hot enough to have an iron fog and to rain hot iron droplets(細沫).”

The new planet is 30 times farther away than any planet discovered by scientists

 before.It is in the Milky Way(銀河)but it is not in our solar(太陽的)system.The new planet moves around a star much like our sun,however scientists discovered the planet by using a new planet?searching method called transit technique.They were able to catch sight of the planet when it moved in front of its star,causing the star's light to dim(變暗).Scientists compare the method to discovering the shadow of a bee flying in front of a searchlight 200 miles away.“We believe the door has been opened wide to go and discover planets like the Earth,”says Sasselov.

1.We can infer from the passage that_________.

A.there is iron on the new planet

B.we could go to the new planet in winter

C.the star could block our view of the new planet

D.scientists are studying the weather

2.The “transit technique”can_____________.

A.help dim the light of a star

B.help scientists with a searchlight

C.help discover a bee on a planet

D.help find a planet moving before its star

3.Which is the best title for the passage?

A.New Planet searching Technique

B.New Distant Discovery

C.Space Searching

D.Dream Planet

查看答案和解析>>

科目：高中英語 來源：江西省同步題 題型：填空題

單詞拼寫。
根據(jù)句意、單詞首字母或漢語提示寫出可以填入句中空格處的單詞。
1. We e______ rice but import wheat.
2. After the star's excellent performance on the stage, the a____________ all burst into cheers.
3. Don't play t__________ on the poor old man, for he seems a stranger here.
4. This is a very e________ film and almost everyone laughs while seeing it.
5. In all,Columbus made three more voyages during the next d________.
6. Sometimes _________(顧客) can benefit from advertisements.
7. The soldiers were e         (裝備)with the lastest weapons.
8. At that time, hunger was a d_________ (令人不安的)problem in many countries..
9.He made some ______(評論)about my dress,and then carried on reading his book.
10. When having English class, I heard two students _______ (低語) to each other.

查看答案和解析>>

科目：高中英語 來源： 題型：閱讀理解

After almost 30 years of arguing that a black hole swallows up everything that falls into it, British astrophysicist (天體物理學(xué)家) Stephen Hawking moved backward last week.

The world-famous writer of "Brief History of Time" said he and other scientists had got it wrong. "I've been thinking about this problem for the last 30 years, and I think I now have the answer to it," said Hawking. "A black hole only appears to form but later opens up and set free information about what fell inside. So we can be sure of the past and can predict the future." The findings could help solve the "black hole information paradox（似是而非的觀點）", an important puzzle in modern physics.

A black hole is an area in space where matter is under such pressure that even light can not escape from its gravitational pull(引力). But, exactly what happens there has long puzzled scientists.

Black holes occur when a powerful star burns up its nuclear fuel and gravity forces it to break down in on itself. The great weight of the star's outer layers moves in towards its center. The force of gravity keeps nearly all light from escaping and nothing inside can be seen from the outside. The star actually disappears from the universe into a point of infinite density（高密度）. That is a place where the laws of general relativity that govern space and time break down.

Hawking has devoted most of his life to studying these questions.

At the beginning, cosmologists believed the holes were like a "universal vacuum (真空) cleaner", sucking up everything in their path.

Hawking revolutionized the study of black holes when he proved, in 1976 that, under the strange rules of quantum physics（量子物理）, when black holes form they send out energy and lose mass in the process.

In thinking up this so-called "Hawking radiation", the Cambridge mathematician also created one of the biggest puzzles in physics.

These particles (粒子), he said, contained no information about what has been occurring inside the black hole, or how it formed. Under his theory, once the black hole disappears, all the information within it is lost.

 

72. What's the importance of Hawking's new findings?

A. They could help solve the puzzle about black holes.

B. They has solved the mystery of "black holes".

C. We can now know what is going on inside "black holes".

D. Scientists have already predicted the future of "black holes" now.

73. What's the meaning of the underlined word "cosmologist" (in Paragraph 9)?

A. A person who studies the universe and its origin and development.

B. A person who studies the stars and their development.

C. A person who travels in a spacecraft.]

D. A person who studies the position of the stars and the movements of the planets.

74. Which of the following is TRUE?

A. Hawking has now studied black holes for more than 40 years.

B. During the course of the black hole's forming the enormous weight of the star's center moves into the outer layers.

C. Almost nothing can escape from the gravitational pull of the black hole.

D. Scientists have been thinking the black hole contains no information.

75. What would be the best title for the passage?

A. The Formation of the Black Hole              B. Black Hole Information Paradox

C. Black Hole Mystery                                 D. The Cause of the Black Hole

 

查看答案和解析>>

科目：高中英語 來源： 題型：

根據(jù)下列句子所給漢語注釋，寫出空缺處各單詞的正確形式。（每空只寫一詞）

1．Many shops close on ________ （星期四） afternoons.

2．What about leaving it here and ________ （收集） it on the way back?

3．Nearly four fifths of the students here go to ________ （西方） countries for further study.

4．He began to run an ________ （極其） high fever at night.

5．There was so little money when they had their fourth child that they could not _______（負擔(dān)得起）to pay for the food.

6．That certainly sounds a reasonable ________ （解釋）, I think.

7．The star's surface _______（溫度） is believed to be –75℃.

8．We can't allow our ________ （ 個人） feelings to get into the way.

9．He ________ （承認） that he did want to give it a try.

10．I think ________ （字典） are necessary when we try to write an article.

查看答案和解析>>

科目：高中英語 來源： 題型：閱讀理解

 (江西省撫州一中2009屆高三第四次模擬考試B篇)

How many things can you see in the night sky? A lot! On a clearnight you might see the Moon, some planets, and thousands of sparkling stars.

       You can see even more with a telescope. And with bigger and bigger telescopes you can see more and more objects in the sky. And you can see those objects in more and more detail.

       But scientists believe there are some things in the sky that we will never see. We won't see them with the biggest telescope in the world, on the clearest night of the year.

      That's because they're invisible. They're the mysterious dead stars called black holes.

       You might find it hard to imagine that stars die. After all, our Sun is a star. Year after year we see it up in the sky, burning brightly, giving us heat and light. The Sun certainly doesn't seem to be getting old or weak. But stars do burn out and die after billions of years.

       As a star's gases burn, they give off light and heat. But when the gas runs out, the star stops burning and begins to die.

      As the star cools, the outer layers of the star pull in toward the center. The star squashes into a smaller and smaller ball. If the star was very small, the star ends up as a cold, dark ball called a black dwarf. If the star was very big, it keeps squashing inward until it's packed together tighter than anything in the universe.

       Imagine if the Earth were crushed until it was the size of a tiny marble. That's how tightly this dead star, a black hole, is packed. What pulls the star in toward its center with such power? It's the same force that pulls you down when you jump--the force called gravity. A black hole is so tightly packed that its gravity sucks in everything--even light. The light from a black hole can never come back to your eyes. That's why you see nothing but blackness.

       So next time you stare up at the night sky, remember: there's more in the Sky than we can see! Scattered in the silent darkness are black holes--the great mystery of space.

60. According to the article, what causes a star to die?

     A. As its gases run out, it cools down.                B. It has a collision with other stars.

C. It can only live for about a million years.     

D. As it gets hotter and hotter, it explodes.

61. Which of the following statements is NOT true?

    A. Black holes are dead stars.

    B. Black holes have gravity.

    C. Black holes are invisible.

    D. There is nothing as mysterious as a black hole.

62. W. hat happens AFTER a star dies?

    A. It becomes invisible.                          B. It fails to Earth.

    C. It burns up all of its gases.                     D. It becomes brighter and easier to see.

63. Why can't you see light when you look at a black hole?

    A. Because most black holes are so far away.

    B. Because the gravity of a black hole is so strong that it sucks the light inward.

    C. Because as the star's gases burn, it stops giving off heat and light.

    D. Because as a star cools, its outer layers pull in toward its center.                                                

查看答案和解析>>

同步練習(xí)冊答案