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 YanpingMJ=Michael JonesMJ:Hello,Dr Li Yanping.Its so good of you to ta
2、lk to me.Some _ ask uswhy 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.studentsearthexplaincentr
3、ewrongapplefall to the ground.He said that something else must be _ the appleback 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 travelling in _ space,you could
4、nt 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 hit it?LY:Not exactly.You may _ it v
5、ery fast and then it would throw you out into space again.After that you would slowdown to the _ speed.Listen again and fill in the blanks.gravityclosertowardspassusualMJ:How do you know this?LY:In _ Einstein said that in space largeobjects make space-time bend;the larger the object,the _ space-time
6、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 1905furtherslowerblackmassfromaround this mass.If you cross over this edge,its _ for you to get back.However if you dont
7、 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 LiweiR:Thank you so much,Mr Yang,for coming to talk to us today a
8、bout 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 fill in the blanks.experiencehappyexcitingliftwaywould become the _ country
9、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 going round it.thirdafraidtrainedcalmbeautyListen to Part 2.R:Did you always want to
10、 be an astronaut?Y:Well,I _ of it when I was young,but I never thought my wish wouldcome true.It all happened _.First I got my _ and then I trainedfor _ years to fly airplanes and then tofly a _.Listen again and fill in the blanks.dreamedgraduallydegreetenspaceshipR:I see.Did you have to be a _ size
11、 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 _?certain17070choiceagainY:Yes,I would if there was an _.Id love to go to the _ one day.R:I hope well be talking to
12、you againafter 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=WallisL=Li YanpingW:Mr Li,would you please tell us about your space _?L:Yes.Id be happy to.We cleaned and _ the Hubble telescope.
13、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.Theyre very _ and carry all theoxygen we need to _.The suitalso has hot and cold _ so it canwarm us if its too cold or cool us if i
14、ts too _.So its very heavy.W:Is it _ to leave the spaceship?thickbreathewaterhotdangerousL:Yes,indeed.When we _,we gointo a small room.We have to wear gravity _ 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
15、 do you _ about in space?leavebootsspaceoutmoveL:We use _ engines to move around.To go left we push the right engineand to go right we _ the left one.We move slowly because we dont _ anything.We can fly aroundlike _.W:What does it feel like in space?L:Very _.There is no gravity sodoing any job is ve
16、ry _.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.flytieropespecialfinelose
