1、必修3Unit 4 Astronomy: the science of the stars注: 另附 word 文档。点击此处链接Listen to Part 1.THEORIES OF GRAVITYMichael Jones of the New Space Magazine is talking with space traveller Li Yanping about changes in the theory of gravity.LY = Dr Li Yanping MJ = Michael JonesMJ: Hello, Dr Li Yanping. Its so good of
2、 you to talk to me. Some _ ask us why things always fall back to _ if you throw them up in the air. Could you _ it?LY: Well, at first people thought it was because the earth was the _ of the universe. Of course that was _. One day Isaac Newton watched an _Listen again and fill in the blanks.students
3、earthexplaincentrewrongapple fall to the ground. He said that something else must be _ the apple back to earth. He called it “gravity”.MJ: I see. Did people _ his idea?LY: They did. Later they worked out that bigger _ (like the sun) have stronger gravity than _ objects (like our planets). If youre t
4、ravelling in _ space, you couldnt fall back to the earth. Youre just too far _.pullingacceptobjectssmallerdeepawayListen to Part 2.MJ: Does it mean theres no _ in space?LY: No. In a spaceship you would feel the pull as it got _ to such an object. You would travel faster and faster _ it.MJ: Until you
5、 hit it?LY: Not exactly. You may _ it very fast and then it would throw you out into space again. After that you would slow down to the _ speed.Listen again and fill in the blanks.gravityclosertowardspassusualMJ: How do you know this?LY: In _ Einstein said that in space large objects make space-time
6、 bend; the larger the object, the _ space-time bends. So time goes _ in very strong gravity.MJ: What about _ holes?LY: Thats a place in space which has such a strong _ that nothing can escape _ its gravity. There is a kind of edge 1905furtherslowerblackmassfrom around this mass. If you cross over th
7、is edge, its _ for you to get back. However if you dont cross this edge, you can still _. Stephen Hawking has done a lot of _ into black holes. He has shown that they “spit” things out as _ as “eat” them.impossibleescaperesearchwellListen to Part 1.AN INTERVIEW WITH YANG LIWEIR = Mr Renault Y = Yang
8、 LiweiR: Thank you so much, Mr Yang, for coming to talk to us today about your _ in space.Y: Not at all. Im _ to be here.R: Please can you tell us your most _ moment?Y: Well, that was when the spaceship began to _ off the ground. Then I knew that I was really on my _ and that ChinaListen again and f
9、ill in the blanks.experiencehappyexcitingliftway would become the _ country to send people into space.R: Did you feel _? Y: No, because I was _ not to worry. So I watched all my instruments and stayed _.R: What surprised you?Y: The _ of space. Id never realized how lovely the earth looks till I was
10、going round it. thirdafraidtrainedcalmbeautyListen to Part 2.R: Did you always want to be an astronaut? Y: Well, I _ of it when I was young, but I never thought my wish would come true. It all happened _. First I got my _ and then I trained for _ years to fly airplanes and then to fly a _.Listen aga
11、in and fill in the blanks.dreamedgraduallydegreetenspaceshipR: I see. Did you have to be a _ size and weight?Y: Yes. An astronaut has to be smaller than _ cm and weigh less than _ kg.R: So you were the perfect _! But of course you had to work very hard. Would you like to go into space _? certain1707
12、0choiceagainY: Yes, I would if there was an _. Id love to go to the _ one day.R: I hope well be talking to you again after youve _ that trip! Goodbye, Mr Yang. Thank you for _ to us.Y: It was my pleasure.opportunitymoonfinishedtalkingListen to the text.AN INTERVIEW WITH LI YANPINGW = Wallis L = Li Y
13、anpingW: Mr Li, would you please tell us about your space _?L: Yes. Id be happy to. We cleaned and _ the Hubble telescope.W: Oh, and is that _ you did your space walk?L: Yes.W: How did you _ for it?Listen again and fill in the blanks.walkrepairedwhenprepareL: First we had to get into spacesuits. The
14、yre very _ and carry all the oxygen we need to _. The suit also has hot and cold _ so it can warm us if its too cold or cool us if its too _. So its very heavy.W: Is it _ to leave the spaceship?thickbreathewaterhotdangerousL: Yes, indeed. When we _, we go into a small room. We have to wear gravity _
15、 to walk there. We close the door behind us and then we open the door to _. Then our gravity boots stop working and we fly _ of the door.W: How do you _ about in space?leavebootsspaceoutmoveL: We use _ engines to move around. To go left we push the right engine and to go right we _ the left one. We
16、move slowly because we dont _ anything. We can fly around like _.W: What does it feel like in space?L: Very _. There is no gravity so doing any job is very _.smallpushweighfeathersstrangetiringW: What happens if you _ too far from the spaceship?L: Youd never get back so we _ ourselves to the spaceship with a special _.W: How did you repair the Hubble telescope?L: We used some _ tools tied round our waists. That way we didnt _ them. We did a good job. The telescope works _ now.W: Thank you very much, Mr Li.flytieropespecialfine lose
