PID控制器在设定参数时不可少的是()。
A、比例单元A
暂无解析
Passage4
Questions 16to 20arebasedonthefollowingpassage:
Morethan30,000driversandfrontseatpassengersarekilledorseriouslyinjuredeachyear.Atthespeedofonly30milesperhouritisthesameasfallingfromathird-floorwindows.Wearingaseatbeltsaveslives;itreducesyourchanceofdeathorseriousinjurybymorethanhalf.
Thereforedriversorfrontseatpassengersover14inmostvehiclesmustwearaseatbelt.Ifyoudonot,youcouldbefinedupto£50.itwillnotbeuptothedriverstomakesureyouwearyourbelt.Butitwillbethedriver’sresponsibilitytomakesurethatchildrenunder14donotrideinthefrontunlesstheyarewearingaseatbeltofsomekind.
However,youdonothavetowearaseatbeltifyoureversingyourvehicle;oryouaremakingalocaldeliveryorcollectionusingaspecialvehicle;orifyouhaveavalidmedicalcertificatewhichexcusesyoufromwearingit.Makesurethesecircumstancesapplytoyoubeforeyoudecidenottowearyouseatbelt.(76)Rememberyoumaybetakentocourtfornotdoingso,andyoumaybefinedifyoucannotprovetothecourtthatyouhavebeenexcusedfromwearingit.
1.Thistextistakenfrom________.
A)amedicalmagazineB)apolicereport
C)alegaldocumentD)agovernmentinformationbooklet
2.Wearingaseatbeltinavehicle________.
A)reducesroadaccidentsbymorethanhalf
B)savesliveswhiledrivingataspeedupto30milesperhour
C)reducesthedeathrateintrafficaccidentsD)savesmorethan15,000liveseachyear
3.Itisthedriver’sresponsibilityto________.
A)makethefrontseatpassengerwearaseatbelt
B)makethefrontseatchildrenunder14wearaseatbelt
C)stopchildrenridinginthefrontseatD)wearaseatbelteachtimehedrives
4.Accordingtothetext,whichofthefollowingpeopleridinginthefrontdosnothavetowearaseatbelt?
A)Someonewhoisbackingintoaparkingspace.
B)Someonewhoispickingupthechildrenfromthelocalschool.
C)Someonewhoisdeliveringinvitationletters.
D)Someonewhoisunder14.
5.Forsomepeople,itmaybebetter________.
A)towearaseatbeltforhealthreasons
B)nottowearaseatbeltforhealthreasons
C)togetvalidmedicalcertificatebeforewearingaseatbelt
D)topayafineratherthanwearaseatbelt
BernardBailynhasrecentlyreinterpretedtheearlyhistoryoftheUnitedStatesbyapplyingnewsocialresearchfindingsontheexperiencesofEuropeanmigrants.Inhisreinterpretation,migrationbecomestheorganizingprincipleforrewritingthehistoryofpreindustrialNorthAmerica.Hisapproachrestsonfourseparatepropositions.ThefirstoftheseassertsthatresidentsofearlymodernEnglandmovedregularlyabouttheircountryside;migratingtotheNewWorldwassimplyanaturalspillover.AlthoughatfirstthecoloniesheldlittlepositiveattractionfortheEnglishDtheywouldratherhavestayedhomeDbytheeighteenthcenturypeopleincreasinglymigratedtoAmericabecausetheyregardeditasthelandofopportunity.Secondly,Bailynholdsthat,contrarytothenotionthatusedtoflourishinAmericahistorytextbooks,therewasneveratypicalNewWorldcommunity.Forexample,theeconomicanddemographiccharacterofearlyNewEnglandtownsvariedconsiderably.Bailyn'sthirdpropositionsuggesttwogeneralpatternsprevailingamongthemanythousandsofmigrants:onegroupcameasindenturedservants,anothercametoacquireland.Surprisingly,Bailynsuggeststhatthosewhorecruitedindenturedservantswerethedrivingforcesoftransatlanticmigration.ThesecolonialentrepreneurshelpeddeterminethesocialcharacterofpeoplewhocametopreindustrialNorthAmerica.Atfirst,thousandsofunskilledlaborerswererecruited;bythe1730's,however,Americanemployersdemandedskilledartisans.Finally,Bailynarguesthatthecolonieswereahalf-civilizedhinterlandoftheEuropeanculturesystem.HeisundoubtedlycorrecttoinsistthatthecolonieswerepartofanAnglo-Americanempire.ButtodividetheempireintoEnglishcoreandcolonialperiphery,asBailyndoes,devaluestheachievementsofcolonialculture.Itistrue,asBailynclaims,thathighcultureinthecoloniesnevermatchedthatinEngland.Butwhatofseventeenth-centuryNewEngland,wherethesettlerscreatedeffectivelaws,builtadistinguisheduniversity,andpublishedbooksBailynmightrespondthatNewEnglandwasexceptional.However,theideasandinstitutionsdevelopedbyNewEnglandPuritanshadpowerfuleffectsonNorthAmericanculture.AlthoughBailyngoesontoapplyhisapproachtosomethousandsofindenturedservantswhomigratedjustpriortotherevolution,hefailstolinktheirexperiencewiththepoliticaldevelopmentoftheUnitedStates.Evidencepresentedinhisworksuggestshowwemightmakesuchaconnection.TheseindenturedservantsweretreatedasslavesfortheperiodduringwhichtheyhadsoldtheirtimetoAmericanemployers.Itisnotsurprisingthatassoonastheyservedtheirtimetheypassedupgoodwagesinthecitiesandheadedwesttoensuretheirpersonalindependencebyacquiringland.Thus,itisinthewestthatapeculiarlyAmericanpoliticalculturebegan,amongcolonistswhoweresuspiciousofauthorityandintenselyanti-aristocratic.
1.WhichofthefollowingstatementsaboutmigrantstocolonialNorthAmericaissupportedbyinformationinthetext
[A]AlargerpercentageofmigrantstocolonialNorthAmericacameasindenturedservantsthanasfreeagentsinterestedinacquiringland.
[B]Migrantswhocametothecoloniesasindenturedservantsweremoresuccessfulatmakingalivelihoodthanwerefarmersandartisans.
[C]MigrantstocolonialNorthAmericaweremoresuccessfulatacquiringtheirownlandduringtheeighteenthcenturythanduringtheseventeenthcentury.
[D]Bythe1730's,migrantsalreadyskilledinatradewereinmoredemandbyAmericanemployersthanwereunskilledlaborers.
2.TheauthorofthetextstatesthatBailynfailedto
[A]GivesufficientemphasistotheculturalandpoliticalinterdependenceofthecoloniesandEngland.
[B]DescribecarefullyhowmigrantsofdifferentethnicbackgroundspreservedtheircultureintheUnitedStates.
[C]TakeadvantageofsocialresearchontheexperiencesofcolonistswhomigratedtocolonialNorthAmericaspecificallytoacquireland.
[D]RelatetheexperienceofthemigrantstothepoliticalvaluesthateventuallyshapedthecharacteroftheUnitedStates.
3.Whichofthefollowingbestsummarizestheauthor'sevaluationofBailyn'sfourthproposition
[A]Itistotallyimplausible.
[B]Itispartiallyacceptable.
[C]Itishighlyadmirable.
[D]Itiscontroversialthoughpersuasive.
4.Accordingtothetext,BailynandtheauthoragreeonwhichofthefollowingstatementsaboutthecultureofcolonialNewEngland
[A]HighcultureinNewEnglandneverequaledthehighcultureofEngland.
[B]TheculturalachievementsofcolonialNewEnglandhavegenerallybeenunrecognizedbyhistorians.
[C]ThecolonistsimitatedthehighcultureofEngland,anddidnotdevelopaculturethatwasuniquelytheirown.
[D]ThesoutherncoloniesweregreatlyinfluencedbythehighcultureofNewEngland.
5.TheauthorofthetextwouldbemostlikelytoagreewithwhichofthefollowingstatementsaboutBailyn'swork
[A]BailynunderestimatestheeffectsofPuritanthoughtonNorthAmericanculture.
[B]BailynoveremphasizestheeconomicdependenceofthecoloniesonGreatBritain.
[C]Bailyn'sdescriptionofthecoloniesaspartofanAnglo-Americanempireismisleadingandincorrect.
[D]BailynfailedtotesthispropositionsonaspecificgroupofmigrantstocolonialNorthAmerica.
Asthepressure____,theliquidrockisforcedupthroughchannelsintheresistantrocktotheearth’ssurface.
InfacttheSwedendidnotunderstandthethreequestions____wereaskedinFrench.
Istillrememberthedays____westudiedtogether.