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¡¡¡¡97.5.42//26.outer space 27.space suit 28.explode 29.gravity
¡¡¡¡30.air pressure/Astronauts must wear space suits if they want to
¡¡¡¡survive in outer space.Without space suits£¬a body would explode
¡¡¡¡because there is no gravity or air pressure in outer space.
¡¡¡¡31.space shuttle 32.torso 33.insulation
¡¡¡¡34.radiatio 35.bladder 36.helmet 37.inflatable
¡¡¡¡38.sophisticated/If you are in the space shuttle£¬you have to wear a space suit.The torso part of it is made of seven durable layers¡¡
¡¡¡¡/One of the layers is what we call a bladder of oxygen.It is used to press the body insgroupsto prevent if from explosion.
¡¡¡¡/The insulation layer can protect astronauts from temperature
¡¡¡¡extremes and radiation./The helmet is also a sophisticated part of the space suit.
¡¡¡¡39.ventilation 40.innermost
¡¡¡¡97.12.47//41.astronomer 42.observatory 43.peer 44.telescope 45.analyze 46.theoretical problem 47.observe 48.photograph 49.coat 50.photographic plate 51.light-sensitive material 52.image 53.remote 54.feeble 55.exposure 98.8±±47//56.NASA=National Aeronautics and Space Administration
¡¡¡¡57.treadmill 58.scuba diver 59.simulate 60.the moon 61.Mars 62.lunar 63.keep balance 64.Martian 65.traction 66.stride 67.stability 68.settlesintos69.air tank 70.elbow 99.5.47//71.origin 72.solar system 73.be consistent with 74.iron 75.capture 76.earth's gravitational force 77.composition 78.core 79.earthe's crust 80.be referred to as 81.chunk 82.be composed of
¡¡¡¡99.8.31//83.annual astronomy society meeting 84.establish 85.existence 86.orbit 87.locate 88.billion 89.dim 90.candle
¡¡¡¡91.indirect method 92.subtle distortion 93.rock back and forth 94.spots of light£¨pinpoint of light£© 95.break down
¡¡¡¡96.chemical composition 97.telltale signs of life 98.ozone molecules
¡¡¡¡99.10.31//99.far-fetched 100.new theory 101.comet 102.satellite 103.detect 104.collide£¨collision£© 105.atmosphere 106.cosmic dust 107.bum up 108.break up£¨disintegrate£© 109.fill up 110.traditional view 111.volcano 112.originate 113.volcanic fume £¨steam£©
¡¡¡¡2000.1.43//114.put forward a new theory£¨argument£© 115.observation
¡¡¡¡116.heavenly body 117.eclipse 118.disk 119.shadow 120.spherical 121.perfect circle 122.ellipse 123.North Star£¨Polaris£© 124.circumference 125.stretch out 126.position 127.stadiom
¡¡¡¡¶Åΰ¡¶TOEFLÌýÁ¦³£¿¼¶ÎÂä´Ê»ã·ÖÀà¡·ÌìÎÄѧastronomy£¬ astronomer£¬ astronomical object£¬illusive object£¬ cosmos£¬ space£¬ solar system£¬Brown Dwarf£¬ gaseous bodies£¬ planet£¬ massive£¬ ignite£¬ star£¬ heaven£¬ celestial£¬ faint£¬ universe£¬ comet£¬ meteor£¬ obserbatory£¬ telescope£¬ image£¬ remote£¬ feeble£¬ origin£¬ gravitational force£¬ molten£¬ Mars
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