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1、第一章总论“十二五”期间延寿县新建养猪合作社万头生猪养殖扩建项目可行性研究报告项目名称：延寿县新建养猪合作社万头生猪养殖扩建项目建设单位：哈尔滨市延寿县新建养猪专业合作社项目负责人：薛云昌联系电话：13304515611项目建设地点：哈尔滨市延寿县加信镇新建村项目建设时间：二○一一年七月至二○一三年十二月可研报告编制时间：二○一一年七月5achancetomakeatripintospacewithmyfriendLiYanping,anastronomer.Wevisitedthemooninourspaceship! Beforeweleave,LiY
2、anpingexplainedtomethattheforeceofthegravitywouldchangethreetimesonourjourneyandthatthefirstchangewouldbethemostpowerful.Thenwewereoff.Astherocketroseintotheair,wewerepushedbackintoourseatsbecauseweweretryingtoescapethepulloftheearth’sgravity.Itwassohardthatwecouldnotsayanythingto
3、eachother.GraduallytheweightlessenedandIwasabletotalktohim.“Whyisthespaceshipnotfallingbacktotheearth?OntheearthifIfallfromatreeIwillfalltoground.”Iasked.“Wearetoofarfromtheearthnowtofeelitspull,“heexplained,“sowefeelasifthereisnogravityatall.Whenwegetclosertothemoon,weshallfeelit
4、sgravitypullingus,butitwillnotbeasstrongapullastheearth’s.“Icheeredupimmediatelyandfloatedweightlesslyaroundinourspaceshipcabinwatchingtheearthbecomesmallerandthemoonlarger. Whenwegotthere,Iwantedtoexploreimmediately.“Comeon,”Isaid.“Ifyouareright,mymasswillbelessthanontheearthbeca
5、usethemoonissmallerandIwillbeabletomovemorefreely.ImightevengrowtallerifIstayherelongenough.Ishallcertainlyweighless!”Ilaughedandclimbeddownthestepsfromthespaceship.ButwhenItriedtostepforward,IfoundIwascarriedtwiceasfarasontheearthandfellover.“Ohdear,”Icried,“walkingdoesneedabitof
6、practicenowthatgravityhaschanged.”AfterawhileIgotthehangofitandwebegantoenjoyourselves. Leavingthemoon’sgravitywasnotaspainfulasleavingtheearth’s.Butreturningtotheearthwasveryfrightening.Wewatched,amazedasfirebrokeoutontheoutsideofthespaceshipastheearth’sgravityincreased.Againwewe
7、repushedbackhardintoourseatsaswecamebacktoland.“Thatwasveryexhaustingbutveryexcitingtoo,”Isaid.“NowIknowmuchmoreaboutgravity!Doyouthinkwecouldbisitsomestarsnexttime?”“Ofcourse,”hesmiled,“whichstarwouldyouliketogoto?” Caughtbyablackhole ThespaceshipwarnedLiYanpingandmetobereadyaswe
8、wereapproachingthe“blackhole”.Wec
