如图 当电容器两端电压U等于3V时,电容器储集了1.5x10*c电量,则该电容器的电容为()
D
暂无解析
Physicsisthepresentdayequivalentof____usedtobecallednaturalphilosophy,from____mostofpresentdaysciencearose.
LastFridayIsawsomeboys______behindDaniel,_____thecomputergames.
Afriendofminewasfondofdrawinghorse.Hedrewthehorsesverywell,buthealwaysbeganthetail.NowitistheWesternruletobeginattheheadofthehorse,thatiswhyIwassurprised.Itstruckmethatitcouldnotreallymakeanydifferencewhethertheartistbeginsattheheadorthetailorthebelly(肚子)orthefootofthehorse,ifhereallyknowshisbusiness.Andmostgreatartistswhoreallyknowtheirbusinessdonotfollowotherpeople’srule.Theymaketheirownrules.Everyoneofthemdoeshisworkinawaypeculiar(奇特的)tohimself;andthepeculiaritymeansonlythathefindsitmoreeasytoworkinthatway.
Nowtheverysamethingistruetoliterature(文学).Andthequestion,"HowshallIbegin?"onlymeansthatyouwanttobeginattheheadinsteadofbeginningatthetailorsomewhereelse.Thatis,youarenotyetexperienced(有经验的)enoughtotrusttoyourownpowers.Whenyoubecomemoreexperiencedyouwill
neveraskthequestion,andIthinkthatyouwilloftenbeginatthetail--thatistosay,youwillwritetheendofthestorybeforeyouhaveeventhoughtofthebeginning.
1.Afriendofthewriter’sdrewthehorses____.
A.verywell
B.inthewayofwesternrule
C.inthewayofhisownrule
D.alloftheabove
2.Thewriterwassurprisedbecause____.
A.theartistbegantodrawattheheadofthehorse
B.theartistbegantodrawatthetailofthehorse
C.theartistmadehisownrule
D.theartistdidnotfollowotherpeople’srule
3.Youarenotyetexperiencedbecause____.
A.youdon’tknowwheretobegin
B.youwanttobeginattheheadinsteadofbeginningatthetail
C.youalwaysaskedquestion
D.youdonottrusttoyourownpowers
4.Whenyoubecomemoreexperiencedyouwill____.
A.neveraskquestion
B.oftenbeginatthetail
C.shouldwritetheendofthestory
D.shouldthinkofthebeginning
5.Thetopicofthepassageis______.
A.Howtodrawahorse
B.Howtowriteastory
C.Howtomakeyourownrules
D.Trusttoyourownpowers
Passage3
Questions11to15arebasedonthefollowingpassage:
“...WearenotabouttoentertheInformationAgebutinsteadareratherwellintoit.”Presentpredictionsarethatby1990,aboutthirtymillionjobsintheUnitedStates,oraboutthirtypercentofthejobmarket,willbecomputer-related.In1980,onlytwenty-onepercentofallUnitedStateshighschoolsownedoneormorecomputersforstudentuse.(79)Inthefallof1985,anewsurveyrevealedthathalfofUnitedStatessecondaryschoolshavefifteenormorecomputersforstudentuse.Andnoweducationalexperts,administrators,andeventhegeneralpublicaredemandingthatallstudentsbecome“computerliterate(慢点…的).”“Bytheyear2000knowledgeofcomputerswillbenecessaryinovereightypercentofalloccupations.Soonthosepeoplenoteducatedincomputerusewillbecomparedtothosewhoareprintilliteratetoday.”
Whatis“computerliteracy”?Thetermitselfseemstoimplysoonextentof“knowing”aboutcomputers,butknowingwhat.Thecurrentopinionseemstobethatthisshouldincludeageneralknowledgeofwhatcomputersare,plusalittleoftheirhistoryandsomethingofhowtheyoperate.
Therefore,itisvitalthateducatorseverywheretakeacarefullooknotonlyatwhatisbeingdone,butalsoatwhatshouldbedoneinthefieldofcomputereducation.Todaymostadultsarecapableofutilisingamotorvehiclewithouttheslightestknowledgeofhowtheinternal-combustionengineworks.Weeffectivelyusealltypesofelectricalequipmentwithoutbeingabletotelltheirhistoriesortoexplainhowtheywork.(80)Businesspeopleforyearshavemadegooduseoftypewritersandaddingmachines,yetfewhaveeverknownhowtorepairthem.Why,then,attempttoteachcomputersbyteachinghoworwhytheywork?
Rather,wefirstmustconcentrateonteachingtheeffectiveuseofthecomputerasthetoolis.
“Knowinghowtouseacomputeriswhat’sgoingtobeimportant,wedon’ttalkabout‘automobileliteracy.‘Wejustgetinourcarsanddrivethem.”
11.In1990,thenumberofjobshavingnothingtodowithcomputersintheUnitedStateswillbereducedto________.
A)79millionB)30millionC)70millionD)100million(C)
12.Theexpression“Printilliterate”(Para.1,Line16)refersto________.
A)onewhohasneverlearntprintingB)onewhoisnotcomputerliterate
C)onewhohasneverlearnttoreadD)onewhoisnotabletouseatypewriter(C)
13.Thefirstparagraphismainlyabout________.
A)recentpredictionsofcomputer-relatedjobsB)thewideuseofcomputersinschools
C)theurgencyofcomputereducationD)publicinterestincomputers(C)
14.Accordingtotheauthor,theeffectivewaytospreadtheuseofcomputersistoteach____.
A)whatcomputersareB)howtousecomputers
C)wherecomputerscanbeusedD)howcomputerswork(B)
15.WhichofthefollowingstatementsisFALSE?
A)Whattoteachaboutcomputersshouldbereconsidered.
B)Thosewhoarenoteducatedincomputerusewillfinditdifficulttogetajob.
C)HumansocietyhasalreadyenteredtheInformationAge.
D)Thosewhowanttousecomputersshouldknowhowcomputersoperate.
Thereisatree____agroupofLeaguemembersoftenplaychess.