gmp知识读本--企业员工培训教材

ACHANCETOMAKEATRIPINTOSPACEWITHMYFRIENDLIYANPING,ANASTRONOMERWEVISITEDTHEMOONINOURSPACESHIPBEFOREWELEAVE,LIYANPINGEXPLAINEDTOMETHATTHEFORECEOFTHEGRAVITYWOULDCHANGETHREETIMESONOURJOURNEYANDTHATTHEFIRSTCHANGEWOULDBETHEMOSTPOWERFULTHENWEWEREOFFASTHEROCKETROSEINTOTHEAIR,WEWEREPUSHEDBACKINTOOURSEATSBECAUSEWEWERETRYINGTOESCAPETHEPULLOFTHEEARTHSGRAVITYITWASSOHARDTHATWECOULDNOTSAYANYTHINGTOEACHOTHERGRADUALLYTHEWEIGHTLESSENEDANDIWASABLETOTALKTOHIM“WHYISTHESPACESHIPNOTFALLINGBACKTOTHEEARTHONTHEEARTHIFIFALLFROMATREEIWILLFALLTOGROUND”IASKED“WEARETOOFARFROMTHEEARTHNOWTOFEELITSPULL,“HEEXPLAINED,“SOWEFEELASIFTHEREISNOGRAVITYATALLWHENWEGETCLOSERTOTHEMOON,WESHALLFEELITSGRAVITYPULLINGUS,BUTITWILLNOTBEASSTRONGAPULLASTHEEARTHS“ICHEEREDUPIMMEDIATELYANDFLOATEDWEIGHTLESSLYAROUNDINOURSPACESHIPCABINWATCHINGTHEEARTHBECOMESMALLERANDTHEMOONLARGERWHENWEGOTTHERE,IWANTEDTOEXPLOREIMMEDIATELY“COMEON,”ISAID“IFYOUARERIGHT,MYMASSWILLBELESSTHANONTHEEARTHBECAUSETHEMOONISSMALLERANDIWILLBEABLETOMOVEMOREFREELYIMIGHTEVENGROWTALLERIFISTAYHERELONGENOUGHISHALLCERTAINLYWEIGHLESS”ILAUGHEDANDCLIMBEDDOWNTHESTEPSFROMTHESPACESHIPBUTWHENITRIEDTOSTEPFORWARD,IFOUNDIWASCARRIEDTWICEASFARASONTHEEARTHANDFELLOVER“OHDEAR,”ICRIED,“WALKINGDOESNEEDABITOFPRACTICENOWTHATGRAVITYHASCHANGED”AFTERAWHILEIGOTTHEHANGOFITANDWEBEGANTOENJOYOURSELVESLEAVINGTHEMOONSGRAVITYWASNOTASPAINFULASLEAVINGTHEEARTHSBUTRETURNINGTOTHEEARTHWASVERYFRIGHTENINGWEWATCHED,AMAZEDASFIREBROKEOUTONTHEOUTSIDEOFTHESPACESHIPASTHEEARTHSGRAVITYINCREASEDAGAINWEWEREPUSHEDBACKHARDINTOOURSEATSASWECAMEBACKTOLAND“THATWASVERYEXHAUSTINGBUTVERYEXCITINGTOO,”ISAID“NOWIKNOWMUCHMOREABOUTGRAVITYDOYOUTHINKWECOULDBISITSOMESTARSNEXTTIME”“OFCOURSE,”HESMILED,“WHICHSTARWOULDYOULIKETOGOTO”CAUGHTBYABLACKHOLETHESPACESHIPWARNEDLIYANPINGANDMETOBEREADYASWEWEREAPPROACHINGTHE“BLACKHOLE”WECOULDSEESOMEFAINTLIGHTSAROUNDWHATLOOKEDLIKEANEMPTYSPACELIYANPINGSAID,“THATEMPTYHOLEISLIKEAMOUTHALWAYSNEEDINGTOBEFEDTHOSELIGHTSARETHINSTHATAREBEINGPULLEDINTOTIMEBYTHEGRAVITYOFTHEHOLE”WEWATCHEDWITHINTERESTANDAMAZEMENTATTHELIGHTSWHICHSEEMEDTOBEGOINGFAINTERANDFAINTERROUNDTHEEDGEOFTHEBLACKHOLEJUSTTHENTHELIGHTSONOURSPACESHIPWENTOURTHEANDTHECOMPUTERSTOPPEDWORKINGWHATWASHAPPENINGITRIEDTOTURNTHESPACESHIPAWAYFROMTHEHOLEBUTITWOULDNOTMOVEWOULDITEATUSTOOSUDDENLYTHESPACESHIPJUMPEDANDBEGANTOMOVEROUNDTHEEDGEOFTRHEHOLETOOTHEGRAVITYOFTHE“BLACKHOLE”WASPULLINGUSINTOITS“MOUTH”ASTHESPACESHIPMOVEDROUNDTHEBLACKHOLE,IFELTRATHERSICKMYMOUTHWENTDRYANDICLOSEDMYEYESALLTHESTORIESABOUTWHATHAPPENEDWHENYOUWERECAUGHTBYTHEGRAVITYOFA“BLACKHOLE”SEEMTOBETRUEBUTTHENTHESPACESHIPJUMPEDAGAINTHISTIMEITMOVEDSIDEWAYSANDAWAYFROMTHISEDGEOFTHE“BLACKHOLE”SOMEONEWATCHINGMEWOULDHAVESEENTHESPACESHIPFLYINGLIKEABIRDAWAYFROMTHE“BLACKHOLE”BUTWEFELTNOTHINGATLASTWEWEREABLETOLOOKAROUNDUSLUCKILYTHECOMPUTERHADSTARTEDWORKINGAGAINWEREALIZEDTHATWEHADDISCOVEREDSOMETHINGNEWABOUT“BLACKHOLE”IFYOUGOINSIDETHEEDGEOFA“BLACKHOLE”,ITWILL“EAT”YOUANDTHEREISNOESCAPEBUTIFYOUDONOT,YOUMAYHAVEANOPPORTUNITYTOESCAPEHOWEXCITINGUNIT5ATRIPON“THETRUENORTH”LIDAIYUANDHERCOUSINLIUQIANWEREONATRIPTOCANADATOBISITTHEIRCOUSINSINMONTREALONTHEATLANTICCOASTRATHERTHANTAKETHEAEROPLANEALLTHEWAY,THEYDECIDEDTOFLYTOVANCOUVERANDTHENTAKETHETRAINWESTTOEASTACROSSCANADATHETHOUGHTHATTHEYCOULDCROSSTHEWHOLECONTINENTWASEXCITINGTHEIRFRIEND,DANNYLIN,WASWAITINGATTHEAIRPORTHEWASGOINGTOTAKETHEMANDTHEIRBAGGAGETOCATCH“THETRUENORTH”,THECROSSCANADATRAINONTHEWAYTOTHESTATIION,HECHATTEDABOUTTHEIRTRIP“YOUREGOINGTOSEESOMEGREATSCENERYGOINGEASTWARD,YOULLPASSMOUNTAINSANDTHOUSANDSOFLAKESANDFORESTS,ASWELLASWIDERIVERSANDLARGECITIESSOMEPEOPLEHAVETHEIDEATHATYOUCANCROSSCANDAINLESSTHANFICEDAYS,BUTTHEYFORGETTHEFACTTHATCANADAIS5500KILOMETERSFROMCOASTTOCOASTHEREINVANCOUVER,YOUREINCANADASWARMESTPARTPEOPLESAYITISCANADASMOSTBEAUTIFULCITY,SURROUNDEDBYMOUNTAINSANDTHEPACIFICOCEANSKIINGINTHEROCKYMOUNTAINSANDSAILINGINTHEHARBOURMAKEVANCOUVERONEOFCANADASMOSTPOPULARCITIESTOLIVEINITSPOPULATIONISINCREASINGRAPIDLYTHECOASTNORTHOFVANCOUVERHASSOMEOFTHEOLDESTANDMOSTBEAUTIFULFORESTSINTHEWORLDITISSOWETTHERETHATTHETREESAREEXTREMELYTALL,SOMEMEASURINGOVER90METRES”THATAFTERNOONABOARDTHETRAIN,THECOUSINSSETTLEDDOWNINTHEIRSEATSEARLIERTHATDAY,WHENTHEYCROSSEDTHEROCKYMOUNTAINS,THEYMANAGEDTOCATCHSIGHTOFSOMEMOUNTAINGOATSANDEVENAGRIZZLYBEARANDANEAGLETHEIRNEXTSTOPWASCALGARY,WHICHISFAMOUSFORTHECALGARYSTAMPEDECOWBOYSFROMALLOVERTHEWORLDCOMETOCOMPETEINTHESTAMPEDEMANYOFTHEMHAVEAGIFTFORRIDINGWILDHORSESANDCANWINTHOUSANDSOFDOLLARSINPRIZESAFTERTWODAYSTRAVEL,THEGIRLSBEGANTOREALIZETHATCANADAISQUITEEMPTYATSCHOOL,THEYHADLEARNEDTHATMOSTCANADIANSLIVEWITHINAFEWHUNDREDKILOMETRESOFTHEUSABORDER,ANDCANADASPOPULATIONISONLYSLIGHTLYOVERTHIRTYMILLION,BUTNOWTHEYWEREAMAZEDTOSEESUCHANEMPTYCOUNTRYTHEYWENTTHROUGHAWHEATGROWINGPROVINCEANDSAWFARMSTHATCOVEREDTHOUSANDSOFACRESAFRERDINNER,THEYWEREBACKINANURBANAREA,THEBUSYPORTCITYOFTHUNDERBAYATTHETOPOFTHEGREATLAKESBECAUSEOFTHEGREATLAKES,THEYLEARNED,CANADAHASMOREFRESHWATERTHANANYOTHERCOUNTRYINTHEWORLDINFACT,ITHASONETHIRDOFTHEWORLDSTOTALFRESHWATER,ANDMUCHOFITISINTHEGREATLAKESTHATNIGHTASTHEYSLEPT,THETRAINRUSHEDACROSSTHETOPOFLAKESUPERIOR,THROUGHTHEGREATFORESTSANDSOUTHWARDTOWADSTORONTO“THETRUENORTH”FROMTORONTOTOMONTREALTHENEXTMORNINGTHEBUSHESANDMAPLETREESOUTSIDETHEIRWINDOWWERERED,GOLDANDORANGE,ANDTHEREWASFROSTONTHEGROUND,CONFIRMINGTHATFALLHADARRIVEDINCANADAAROUNDNOONTHEYARRIVEDINTORONTO,THEBIGGESTANDMOSTWEALTHYCITYINCANADATHEYWERENOTLEAVINGFORMONTREALUNTILLATER,SOTHEYWENTONATOUROFTHECITYTHEYWENTUPTHETALLCNTOWERANDLOOKEDACROSSTHELAKEINTHEDISTANCE,THEYCOULDSEETHEMISTYCLOUDTHATROSEFROMTHEGREATNIAGARAFALLS,WHICHISONTHESOUTHSIDEOFTHELAKETHEWATERFLOWSINTOTHENIAGARARIVERANDOVERTHEFALLSONITSWAYTOTHESEATHEYSAWTHECOVEREDSTADIUM,HOMEOFSEVERALFAMOUSBASKETBALLTEAMSASTHEYWALKEDNORTHFROMTHEHARBOURAREA,LIDAIYUSAID,“LINFANG,ONEOFMYMOTHERSOLDSCHOOLMATES,LIVESHEREISHOULDPHONEHERFROMATELEPHONEBOOTH”THEYMETLINFEIAROUNDDUSKINDOWNTOWNCHINATOWN,ONEOFTHETHREEINTORONTOOVERDINNERATARESTAURANTCALLEDTHEPINKPEARL,THECOUSINSCHATTEDWITHLINFEI,WHOHADMOVEDTOCANADAMANYYEARSEARLIER“WECANGETGOODCANTONESEFOODHERE,”LINFEITOLDTHEM,“BECAUSEMOSTOFTHECHINESEPEOPLEHERECOMEFROMSOUTHCHINA,ESPECIALLYHONGKONGITSTOOBADYOUCANTGOASFARASOTTAWA,CANADASCAPITALITSAPPROXIMATELYFOURHUNDREDKILOMETERSNORTHEASTOFTORONTO,SOITWOULDTAKETOOLONG”THETRAINLEFTLATETHATNIGHTANDARRIVEDINMONTREALACHANCETOMAKEATRIPINTOSPACEWITHMYFRIENDLIYANPING,ANASTRONOMERWEVISITEDTHEMOONINOURSPACESHIPBEFOREWELEAVE,LIYANPINGEXPLAINEDTOMETHATTHEFORECEOFTHEGRAVITYWOULDCHANGETHREETIMESONOURJOURNEYANDTHATTHEFIRSTCHANGEWOULDBETHEMOSTPOWERFULTHENWEWEREOFFASTHEROCKETROSEINTOTHEAIR,WEWEREPUSHEDBACKINTOOURSEATSBECAUSEWEWERETRYINGTOESCAPETHEPULLOFTHEEARTHSGRAVITYITWASSOHARDTHATWECOULDNOTSAYANYTHINGTOEACHOTHERGRADUALLYTHEWEIGHTLESSENEDANDIWASABLETOTALKTOHIM“WHYISTHESPACESHIPNOTFALLINGBACKTOTHEEARTHONTHEEARTHIFIFALLFROMATREEIWILLFALLTOGROUND”IASKED“WEARETOOFARFROMTHEEARTHNOWTOFEELITSPULL,“HEEXPLAINED,“SOWEFEELASIFTHEREISNOGRAVITYATALLWHENWEGETCLOSERTOTHEMOON,WESHALLFEELITSGRAVITYPULLINGUS,BUTITWILLNOTBEASSTRONGAPULLASTHEEARTHS“ICHEEREDUPIMMEDIATELYANDFLOATEDWEIGHTLESSLYAROUNDINOURSPACESHIPCABINWATCHINGTHEEARTHBECOMESMALLERANDTHEMOONLARGERWHENWEGOTTHERE,IWANTEDTOEXPLOREIMMEDIATELY“COMEON,”ISAID“IFYOUARERIGHT,MYMASSWILLBELESSTHANONTHEEARTHBECAUSETHEMOONISSMALLERANDIWILLBEABLETOMOVEMOREFREELYIMIGHTEVENGROWTALLERIFISTAYHERELONGENOUGHISHALLCERTAINLYWEIGHLESS”ILAUGHEDANDCLIMBEDDOWNTHESTEPSFROMTHESPACESHIPBUTWHENITRIEDTOSTEPFORWARD,IFOUNDIWASCARRIEDTWICEASFARASONTHEEARTHANDFELLOVER“OHDEAR,”ICRIED,“WALKINGDOESNEEDABITOFPRACTICENOWTHATGRAVITYHASCHANGED”AFTERAWHILEIGOTTHEHANGOFITANDWEBEGANTOENJOYOURSELVESLEAVINGTHEMOONSGRAVITYWASNOTASPAINFULASLEAVINGTHEEARTHSBUTRETURNINGTOTHEEARTHWASVERYFRIGHTENINGWEWATCHED,AMAZEDASFIREBROKEOUTONTHEOUTSIDEOFTHESPACESHIPASTHEEARTHSGRAVITYINCREASEDAGAINWEWEREPUSHEDBACKHARDINTOOURSEATSASWECAMEBACKTOLAND“THATWASVERYEXHAUSTINGBUTVERYEXCITINGTOO,”ISAID“NOWIKNOWMUCHMOREABOUTGRAVITYDOYOUTHINKWECOULDBISITSOMESTARSNEXTTIME”“OFCOURSE,”HESMILED,“WHICHSTARWOULDYOULIKETOGOTO”CAUGHTBYABLACKHOLETHESPACESHIPWARNEDLIYANPINGANDMETOBEREADYASWEWEREAPPROACHINGTHE“BLACKHOLE”WECOULDSEESOMEFAINTLIGHTSAROUNDWHATLOOKEDLIKEANEMPTYSPACELIYANPINGSAID,“THATEMPTYHOLEISLIKEAMOUTHALWAYSNEEDINGTOBEFEDTHOSELIGHTSARETHINSTHATAREBEINGPULLEDINTOTIMEBYTHEGRAVITYOFTHEHOLE”WEWATCHEDWITHINTERESTANDAMAZEMENTATTHELIGHTSWHICHSEEMEDTOBEGOINGFAINTERANDFAINTERROUNDTHEEDGEOFTHEBLACKHOLEJUSTTHENTHELIGHTSONOURSPACESHIPWENTOURTHEANDTHECOMPUTERSTOPPEDWORKINGWHATWASHAPPENINGITRIEDTOTURNTHESPACESHIPAWAYFROMTHEHOLEBUTITWOULDNOTMOVEWOULDITEATUSTOOSUDDENLYTHESPACESHIPJUMPEDANDBEGANTOMOVEROUNDTHEEDGEOFTRHEHOLETOOTHEGRAVITYOFTHE“BLACKHOLE”WASPULLINGUSINTOITS“MOUTH”ASTHESPACESHIPMOVEDROUNDTHEBLACKHOLE,IFELTRATHERSICKMYMOUTHWENTDRYANDICLOSEDMYEYESALLTHESTORIESABOUTWHATHAPPENEDWHENYOUWERECAUGHTBYTHEGRAVITYOFA“BLACKHOLE”SEEMTOBETRUEBUTTHENTHESPACESHIPJUMPEDAGAINTHISTIMEITMOVEDSIDEWAYSANDAWAYFROMTHISEDGEOFTHE“BLACKHOLE”SOMEONEWATCHINGMEWOULDHAVESEENTHESPACESHIPFLYINGLIKEABIRDAWAYFROMTHE“BLACKHOLE”BUTWEFELTNOTHINGATLASTWEWEREABLETOLOOKAROUNDUSLUCKILYTHECOMPUTERHADSTARTEDWORKINGAGAINWEREALIZEDTHATWEHADDISCOVEREDSOMETHINGNEWABOUT“BLACKHOLE”IFYOUGOINSIDETHEEDGEOFA“BLACKHOLE”,ITWILL“EAT”YOUANDTHEREISNOESCAPEBUTIFYOUDONOT,YOUMAYHAVEANOPPORTUNITYTOESCAPEHOWEXCITINGUNIT5ATRIPON“THETRUENORTH”LIDAIYUANDHERCOUSINLIUQIANWEREONATRIPTOCANADATOBISITTHEIRCOUSINSINMONTREALONTHEATLANTICCOASTRATHERTHANTAKETHEAEROPLANEALLTHEWAY,THEYDECIDEDTOFLYTOVANCOUVERANDTHENTAKETHETRAINWESTTOEASTACROSSCANADATHETHOUGHTHATTHEYCOULDCROSSTHEWHOLECONTINENTWASEXCITINGTHEIRFRIEND,DANNYLIN,WASWAITINGATTHEAIRPORTHEWASGOINGTOTAKETHEMANDTHEIRBAGGAGETOCATCH“THETRUENORTH”,THECROSSCANADATRAINONTHEWAYTOTHESTATIION,HECHATTEDABOUTTHEIRTRIP“YOUREGOINGTOSEESOMEGREATSCENERYGOINGEASTWARD,YOULLPASSMOUNTAINSANDTHOUSANDSOFLAKESANDFORESTS,ASWELLASWIDERIVERSANDLARGECITIESSOMEPEOPLEHAVETHEIDEATHATYOUCANCROSSCANDAINLESSTHANFICEDAYS,BUTTHEYFORGETTHEFACTTHATCANADAIS5500KILOMETERSFROMCOASTTOCOASTHEREINVANCOUVER,YOUREINCANADASWARMESTPARTPEOPLESAYITISCANADASMOSTBEAUTIFULCITY,SURROUNDEDBYMOUNTAINSANDTHEPACIFICOCEANSKIINGINTHEROCKYMOUNTAINSANDSAILINGINTHEHARBOURMAKEVANCOUVERONEOFCANADASMOSTPOPULARCITIESTOLIVEINITSPOPULATIONISINCREASINGRAPIDLYTHECOASTNORTHOFVANCOUVERHASSOMEOFTHEOLDESTANDMOSTBEAUTIFULFORESTSINTHEWORLDITISSOWETTHERETHATTHETREESAREEXTREMELYTALL,SOMEMEASURINGOVER90METRES”THATAFTERNOONABOARDTHETRAIN,THECOUSINSSETTLEDDOWNINTHEIRSEATSEARLIERTHATDAY,WHENTHEYCROSSEDTHEROCKYMOUNTAINS,THEYMANAGEDTOCATCHSIGHTOFSOMEMOUNTAINGOATSANDEVENAGRIZZLYBEARANDANEAGLETHEIRNEXTSTOPWASCALGARY,WHICHISFAMOUSFORTHECALGARYSTAMPEDECOWBOYSFROMALLOVERTHEWORLDCOMETOCOMPETEINTHESTAMPEDEMANYOFTHEMHAVEAGIFTFORRIDINGWILDHORSESANDCANWINTHOUSANDSOFDOLLARSINPRIZESAFTERTWODAYSTRAVEL,THEGIRLSBEGANTOREALIZETHATCANADAISQUITEEMPTYATSCHOOL,THEYHADLEARNEDTHATMOSTCANADIANSLIVEWITHINAFEWHUNDREDKILOMETRESOFTHEUSABORDER,ANDCANADASPOPULATIONISONLYSLIGHTLYOVERTHIRTYMILLION,BUTNOWTHEYWEREAMAZEDTOSEESUCHANEMPTYCOUNTRYTHEYWENTTHROUGHAWHEATGROWINGPROVINCEANDSAWFARMSTHATCOVEREDTHOUSANDSOFACRESAFRERDINNER,THEYWEREBACKINANURBANAREA,THEBUSYPORTCITYOFTHUNDERBAYATTHETOPOFTHEGREATLAKESBECAUSEOFTHEGREATLAKES,THEYLEARNED,CANADAHASMOREFRESHWATERTHANANYOTHERCOUNTRYINTHEWORLDINFACT,ITHASONETHIRDOFTHEWORLDSTOTALFRESHWATER,ANDMUCHOFITISINTHEGREATLAKESTHATNIGHTASTHEYSLEPT,THETRAINRUSHEDACROSSTHETOPOFLAKESUPERIOR,THROUGHTHEGREATFORESTSANDSOUTHWARDTOWADSTORONTO“THETRUENORTH”FROMTORONTOTOMONTREALTHENEXTMORNINGTHEBUSHESANDMAPLETREESOUTSIDETHEIRWINDOWWERERED,GOLDANDORANGE,ANDTHEREWASFROSTONTHEGROUND,CONFIRMINGTHATFALLHADARRIVEDINCANADAAROUNDNOONTHEYARRIVEDINTORONTO,THEBIGGESTANDMOSTWEALTHYCITYINCANADATHEYWERENOTLEAVINGFORMONTREALUNTILLATER,SOTHEYWENTONATOUROFTHECITYTHEYWENTUPTHETALLCNTOWERANDLOOKEDACROSSTHELAKEINTHEDISTANCE,THEYCOULDSEETHEMISTYCLOUDTHATROSEFROMTHEGREATNIAGARAFALLS,WHICHISONTHESOUTHSIDEOFTHELAKETHEWATERFLOWSINTOTHENIAGARARIVERANDOVERTHEFALLSONITSWAYTOTHESEATHEYSAWTHECOVEREDSTADIUM,HOMEOFSEVERALFAMOUSBASKETBALLTEAMSASTHEYWALKEDNORTHFROMTHEHARBOURAREA,LIDAIYUSAID,“LINFANG,ONEOFMYMOTHERSOLDSCHOOLMATES,LIVESHEREISHOULDPHONEHERFROMATELEPHONEBOOTH”THEYMETLINFEIAROUNDDUSKINDOWNTOWNCHINATOWN,ONEOFTHETHREEINTORONTOOVERDINNERATARESTAURANTCALLEDTHEPINKPEARL,THECOUSINSCHATTEDWITHLINFEI,WHOHADMOVEDTOCANADAMANYYEARSEARLIER“WECANGETGOODCANTONESEFOODHERE,”LINFEITOLDTHEM,“BECAUSEMOSTOFTHECHINESEPEOPLEHERECOMEFROMSOUTHCHINA,ESPECIALLYHONGKONGITSTOOBADYOUCANTGOASFARASOTTAWA,CANADASCAPITALITSAPPROXIMATELYFOURHUNDREDKILOMETERSNORTHEASTOFTORONTO,SOITWOULDTAKETOOLONG”THETRAINLEFTLATETHATNIGHTANDARRIVEDINMONTREAL1第一部分我们的使命第一章健康、疾病与药品在日常生活中，当身体出现发烧、头痛等症状时，说明我们生病了，身体不再健康。受到了疾病的困扰，必须采取办法治疗疾病。俗语说得好“生病吃药，药到病除”，所以，治疗疾病的办法就是对症下药。辞海对健康的定义人体各器官系统发育良好、功能正常、体质健壮、精力充沛，并具有健全的身心和社会适应能力的状态。通常用人体测量、体格检查和各种生理和心理指标来衡量。辞海对疾病的定义指人体在一定条件下，由致病因素所引起的一种复杂而有一定表现形式的病理过程。此时，在不同程度上，人体正常生理过程遭到破坏，表现为对外环境变化的适应能力降低、劳动力受到限制或丧失，并出现一系列临床症状。疾病是致病因素对人体的损害和人体对抗这些损害的防御、代偿等作用的矛盾。这一矛盾的双方，在整个疾病过程中不断进行斗争，直到疾病痊愈或人体死亡时才告终结。由此可见，药品在维护我们的身体健康中起着不可替代的作用。我们身体一旦受到疾病的侵扰，都必须使用药品予以调节或治疗，才能恢复健康。大家想想，如果没有药品，当受到病患的侵扰时，我们将无力与疾病抗争，任由病魔肆虐，疾病将夺去我们的健康甚至生命。因此，健康离不开药品，我们的生活离不开药品。ACHANCETOMAKEATRIPINTOSPACEWITHMYFRIENDLIYANPING,ANASTRONOMERWEVISITEDTHEMOONINOURSPACESHIPBEFOREWELEAVE,LIYANPINGEXPLAINEDTOMETHATTHEFORECEOFTHEGRAVITYWOULDCHANGETHREETIMESONOURJOURNEYANDTHATTHEFIRSTCHANGEWOULDBETHEMOSTPOWERFULTHENWEWEREOFFASTHEROCKETROSEINTOTHEAIR,WEWEREPUSHEDBACKINTOOURSEATSBECAUSEWEWERETRYINGTOESCAPETHEPULLOFTHEEARTHSGRAVITYITWASSOHARDTHATWECOULDNOTSAYANYTHINGTOEACHOTHERGRADUALLYTHEWEIGHTLESSENEDANDIWASABLETOTALKTOHIM“WHYISTHESPACESHIPNOTFALLINGBACKTOTHEEARTHONTHEEARTHIFIFALLFROMATREEIWILLFALLTOGROUND”IASKED“WEARETOOFARFROMTHEEARTHNOWTOFEELITSPULL,“HEEXPLAINED,“SOWEFEELASIFTHEREISNOGRAVITYATALLWHENWEGETCLOSERTOTHEMOON,WESHALLFEELITSGRAVITYPULLINGUS,BUTITWILLNOTBEASSTRONGAPULLASTHEEARTHS“ICHEEREDUPIMMEDIATELYANDFLOATEDWEIGHTLESSLYAROUNDINOURSPACESHIPCABINWATCHINGTHEEARTHBECOMESMALLERANDTHEMOONLARGERWHENWEGOTTHERE,IWANTEDTOEXPLOREIMMEDIATELY“COMEON,”ISAID“IFYOUARERIGHT,MYMASSWILLBELESSTHANONTHEEARTHBECAUSETHEMOONISSMALLERANDIWILLBEABLETOMOVEMOREFREELYIMIGHTEVENGROWTALLERIFISTAYHERELONGENOUGHISHALLCERTAINLYWEIGHLESS”ILAUGHEDANDCLIMBEDDOWNTHESTEPSFROMTHESPACESHIPBUTWHENITRIEDTOSTEPFORWARD,IFOUNDIWASCARRIEDTWICEASFARASONTHEEARTHANDFELLOVER“OHDEAR,”ICRIED,“WALKINGDOESNEEDABITOFPRACTICENOWTHATGRAVITYHASCHANGED”AFTERAWHILEIGOTTHEHANGOFITANDWEBEGANTOENJOYOURSELVESLEAVINGTHEMOONSGRAVITYWASNOTASPAINFULASLEAVINGTHEEARTHSBUTRETURNINGTOTHEEARTHWASVERYFRIGHTENINGWEWATCHED,AMAZEDASFIREBROKEOUTONTHEOUTSIDEOFTHESPACESHIPASTHEEARTHSGRAVITYINCREASEDAGAINWEWEREPUSHEDBACKHARDINTOOURSEATSASWECAMEBACKTOLAND“THATWASVERYEXHAUSTINGBUTVERYEXCITINGTOO,”ISAID“NOWIKNOWMUCHMOREABOUTGRAVITYDOYOUTHINKWECOULDBISITSOMESTARSNEXTTIME”“OFCOURSE,”HESMILED,“WHICHSTARWOULDYOULIKETOGOTO”CAUGHTBYABLACKHOLETHESPACESHIPWARNEDLIYANPINGANDMETOBEREADYASWEWEREAPPROACHINGTHE“BLACKHOLE”WECOULDSEESOMEFAINTLIGHTSAROUNDWHATLOOKEDLIKEANEMPTYSPACELIYANPINGSAID,“THATEMPTYHOLEISLIKEAMOUTHALWAYSNEEDINGTOBEFEDTHOSELIGHTSARETHINSTHATAREBEINGPULLEDINTOTIMEBYTHEGRAVITYOFTHEHOLE”WEWATCHEDWITHINTERESTANDAMAZEMENTATTHELIGHTSWHICHSEEMEDTOBEGOINGFAINTERANDFAINTERROUNDTHEEDGEOFTHEBLACKHOLEJUSTTHENTHELIGHTSONOURSPACESHIPWENTOURTHEANDTHECOMPUTERSTOPPEDWORKINGWHATWASHAPPENINGITRIEDTOTURNTHESPACESHIPAWAYFROMTHEHOLEBUTITWOULDNOTMOVEWOULDITEATUSTOOSUDDENLYTHESPACESHIPJUMPEDANDBEGANTOMOVEROUNDTHEEDGEOFTRHEHOLETOOTHEGRAVITYOFTHE“BLACKHOLE”WASPULLINGUSINTOITS“MOUTH”ASTHESPACESHIPMOVEDROUNDTHEBLACKHOLE,IFELTRATHERSICKMYMOUTHWENTDRYANDICLOSEDMYEYESALLTHESTORIESABOUTWHATHAPPENEDWHENYOUWERECAUGHTBYTHEGRAVITYOFA“BLACKHOLE”SEEMTOBETRUEBUTTHENTHESPACESHIPJUMPEDAGAINTHISTIMEITMOVEDSIDEWAYSANDAWAYFROMTHISEDGEOFTHE“BLACKHOLE”SOMEONEWATCHINGMEWOULDHAVESEENTHESPACESHIPFLYINGLIKEABIRDAWAYFROMTHE“BLACKHOLE”BUTWEFELTNOTHINGATLASTWEWEREABLETOLOOKAROUNDUSLUCKILYTHECOMPUTERHADSTARTEDWORKINGAGAINWEREALIZEDTHATWEHADDISCOVEREDSOMETHINGNEWABOUT“BLACKHOLE”IFYOUGOINSIDETHEEDGEOFA“BLACKHOLE”,ITWILL“EAT”YOUANDTHEREISNOESCAPEBUTIFYOUDONOT,YOUMAYHAVEANOPPORTUNITYTOESCAPEHOWEXCITINGUNIT5ATRIPON“THETRUENORTH”LIDAIYUANDHERCOUSINLIUQIANWEREONATRIPTOCANADATOBISITTHEIRCOUSINSINMONTREALONTHEATLANTICCOASTRATHERTHANTAKETHEAEROPLANEALLTHEWAY,THEYDECIDEDTOFLYTOVANCOUVERANDTHENTAKETHETRAINWESTTOEASTACROSSCANADATHETHOUGHTHATTHEYCOULDCROSSTHEWHOLECONTINENTWASEXCITINGTHEIRFRIEND,DANNYLIN,WASWAITINGATTHEAIRPORTHEWASGOINGTOTAKETHEMANDTHEIRBAGGAGETOCATCH“THETRUENORTH”,THECROSSCANADATRAINONTHEWAYTOTHESTATIION,HECHATTEDABOUTTHEIRTRIP“YOUREGOINGTOSEESOMEGREATSCENERYGOINGEASTWARD,YOULLPASSMOUNTAINSANDTHOUSANDSOFLAKESANDFORESTS,ASWELLASWIDERIVERSANDLARGECITIESSOMEPEOPLEHAVETHEIDEATHATYOUCANCROSSCANDAINLESSTHANFICEDAYS,BUTTHEYFORGETTHEFACTTHATCANADAIS5500KILOMETERSFROMCOASTTOCOASTHEREINVANCOUVER,YOUREINCANADASWARMESTPARTPEOPLESAYITISCANADASMOSTBEAUTIFULCITY,SURROUNDEDBYMOUNTAINSANDTHEPACIFICOCEANSKIINGINTHEROCKYMOUNTAINSANDSAILINGINTHEHARBOURMAKEVANCOUVERONEOFCANADASMOSTPOPULARCITIESTOLIVEINITSPOPULATIONISINCREASINGRAPIDLYTHECOASTNORTHOFVANCOUVERHASSOMEOFTHEOLDESTANDMOSTBEAUTIFULFORESTSINTHEWORLDITISSOWETTHERETHATTHETREESAREEXTREMELYTALL,SOMEMEASURINGOVER90METRES”THATAFTERNOONABOARDTHETRAIN,THECOUSINSSETTLEDDOWNINTHEIRSEATSEARLIERTHATDAY,WHENTHEYCROSSEDTHEROCKYMOUNTAINS,THEYMANAGEDTOCATCHSIGHTOFSOMEMOUNTAINGOATSANDEVENAGRIZZLYBEARANDANEAGLETHEIRNEXTSTOPWASCALGARY,WHICHISFAMOUSFORTHECALGARYSTAMPEDECOWBOYSFROMALLOVERTHEWORLDCOMETOCOMPETEINTHESTAMPEDEMANYOFTHEMHAVEAGIFTFORRIDINGWILDHORSESANDCANWINTHOUSANDSOFDOLLARSINPRIZESAFTERTWODAYSTRAVEL,THEGIRLSBEGANTOREALIZETHATCANADAISQUITEEMPTYATSCHOOL,THEYHADLEARNEDTHATMOSTCANADIANSLIVEWITHINAFEWHUNDREDKILOMETRESOFTHEUSABORDER,ANDCANADASPOPULATIONISONLYSLIGHTLYOVERTHIRTYMILLION,BUTNOWTHEYWEREAMAZEDTOSEESUCHANEMPTYCOUNTRYTHEYWENTTHROUGHAWHEATGROWINGPROVINCEANDSAWFARMSTHATCOVEREDTHOUSANDSOFACRESAFRERDINNER,THEYWEREBACKINANURBANAREA,THEBUSYPORTCITYOFTHUNDERBAYATTHETOPOFTHEGREATLAKESBECAUSEOFTHEGREATLAKES,THEYLEARNED,CANADAHASMOREFRESHWATERTHANANYOTHERCOUNTRYINTHEWORLDINFACT,ITHASONETHIRDOFTHEWORLDSTOTALFRESHWATER,ANDMUCHOFITISINTHEGREATLAKESTHA