Asspacesciencedevelopsmanhaslearnedmoreandmoreaboutspace.Spaceisnotonlyamazingbutalsodangerous.Whileworkinginspacespacemenarefacingdangeraswellassuccess.Scientistshavefoundoutthatradiation(辐射)isthe

Asspacesciencedevelopsmanhaslearnedmoreandmoreaboutspace.Spaceisnotonlyamazingbutalsodangerous.Whileworkinginspacespacemenarefacingdangeraswellassuccess.

   Scientistshavefoundoutthatradiation(辐射)isthegreatestdangertospacemen'inspace.Whenspacemenareworkinginspacetheyareindangerofradiationfromthesunandotherstarswhichisbadfortheirhealth.Thedamage(危害)donebyradiationwon'tbediscovereduntiltheirchildrenorevengrandchildrenareborn.Somespecialmedicinemayworkalittlebutnoreallyhelpfulmedicinehasbeenfoundsofar.

   Spacerubbishisalsothoughtagreatdangertospacemen.It'sreportedthatthereare9000man-madethingsflyinginspace.About300%ofthesearesatellites (卫星)10%arespaceshipsandtherestarespacerubbish.Anexplosion(爆炸) in1996madeacloudof300000fragments(碎片)eachatleast4mminsizeandevenasmallpieceoftheseknockedagainstaspaceshipwindowanddidsomedamage.Scientistsarewatchingandreportinganypossibledangerallthetime.Theyareworkingtodealwithspacerubbish.

   Althoughspaceisreallydangerousitinterestseveryoneontheearth.Inthenearfutureitmaybecomeusualforpeopletospendafewdaysinaspacehotel.Wemayevenchoosetoleavetheearthandliveinspaceinafewyears.Soweshouldcareforspaceanddosomethingtohelpimprovethespaceenvironment

1.showstheman-madethingsinspaceinthecorrectway.

2.Spacerubbishinspaceandtheradiationfromthesunandotherstarsareharmfulto_______.

A.spacemenworkinginspace   B.peopleonlyontheearth

C.allthepeopleexceptchildren   D.allthespacemen

3.Thepassagetalksabout_______kindsofdangerinspace.

A.two   B.three   C.four   D.five

4.WhichofthefollowingaboutthepassageisTRUE?

A.Everyoneofuscanmakeatriptospaceintenyears.

B.Scientistshavefoundoutwaystosolveanyproblemsinspace.

C.Theharmoftheradiationmaybefoundinthespacemen'schildren.

D.Spaceisreallydangeroussoitdoesn'tinterestanyoneontheearth.