1、Located_______theBeltmeetstheRoad,JiangsuwillcontributemoretotheBeltandRoadconstruction. A.whyB.whenC.whichD.where 2、Whenyouhavefinishedthebook,besuretoplaceit　　　　itusedtobe. A.whichB.whereC.thatD.how 3、—Hey!Youlookcoolinyournewhairstyle. —Thanks.Ifyoulike,youcantrythebarber’s_____Ihavemyhaircut. A.whereB.whoC.whichD.when 4、Smileandkeepinagoodmood_____happensand_____muchtroubleyoumeetwith. A.whatever,howeverB.what,nomatterhow C.what,howD.whatever,how 5、Mygrandfatherstillplaystennisnowandthen,________he’sinhisnineties. A.aslongasB.asifC.eventhoughD.incase 6、_______,herhandsshookconstantlyandviolently. A.Knowinghersonkilledintheaccident B.Whensheknewhersonwaskilledintheaccident C.Knownhersonkilledintheaccident D.Sheknewhersonkilledintheaccident 7、,Ihavetoputitawayandfocusmyattentiononstudythisweek. A.HoweverthestoryisamusingB.Nomatteramusingthestoryis C.HoweveramusingthestoryisD.Nomatterhowthestoryisamusing 8、_______thattheyhadlostthegame,tearsrandownKate’sface. A.OnhearingthenewsB.Whenheardthenews C.ThemomentsheheardthenewsD.Whilehearingthenews 9、______youmayhave，youshouldgatheryourcouragetofacethechallenge. A.HoweveraseriousproblemB.Whataseriousproblem C.HoweverseriousaproblemD.Whatseriousaproblem 10、youmustremaincalm. A.WhateveryoumaybefrightenedB.Howeverfrightenedyoumaybe C.WhateverfrightenedyoumaybeD.Howeveryoumaybefrightened 11、youmustremaincalm. A.WhateveryoumaybefrightenedB.Howeverfrightenedyoumaybe C.WhateverfrightenedyoumaybeD.Howeveryoumaybefrightened 12、_______,Motherwillwaitforhimtohavedinnertogether. A.NomatterhowlateisheB.Nomatterhowheislate C.NomatterhowishelateD.Nomatterhowlateheis 13、_______tomorrow,ourcarwillsetoutforthedistantvillage. A.HowevertheweatherislikeB.Howeveristheweatherlike C.WhateveristheweatherlikeD.Whatevertheweatherislike 14、_______,you’llneverbeabletopersuadehim. A.Nomatterhowgoodadviceyougive B.Howevergoodadvicedoyougive C.Nomatterwhatgoodyougiveadvice D.Whatevergoodadviceyougive 15、______heoncefeltlikegivingup,henowhasthedeterminationtopushfurtherandkeepongoing. A.WhereB.AsC.IncaseD.Nowthat 16、________itis，theboyneverseemstobeabletofinishitoff. A.Howeverinterestingabook B.Whateverinterestingabook C.Howinterestingabook D.Whataninterestingbook 17、—Whendidyougethomelastnight? —Itwasalmostmidnight________wearrivedhome. A.thatB.beforeC.since　D.when 18、　　　,theideaofhavingtoworkunderawomandefeatedhim. A.Wantingthejobverymuch B.Althoughwantingthejobbadly C.Thoughhewantedthejobverymuch D.Hewantedthejobbadly 19、Much　　　　hestateshehasagoodtasteofhisown,hecan’tavoidbeinginfluencedbyadvertisement. A.whileB.althoughC.asD.when 20、If______somethingyoudon’twanttoeat,justrefusepolitely. A.yougiveB.beinggivenC.givenD.aregiven 21、___________________,theexperimentwillbesuccessful. A.IfcarefullydoingB.Ifitwasdonecarefully C.IfcarefullydoneD.Ifdoingcarefully 22、,wewellnotloseheartbecauseweknowwearesupportedbyyouall. A.Nomatterthedifficultymaybe B.Howeverthedifficultymaybe C.Howevergreatthedifficultymaybe D.Howevermaybethedifficulty 23、Don’tsendtextmessagewhile_____. A.youcrossedtheroadB.crossingtheroad C.crosstheroadD.youcrossingtheroad 24、Althoughheisconsideredagreatwriter,_____. A.hisworksisnotwidelyread B.buthisworksarenotwidelyread C.howeverhisworksarenotwidelyread D.yethisworksarenotwidelyread 25、___________,motherwillwaitforhimtohavedinnertogether. A.HoweverishelateB.Howeverheislate C.HoweverlateisheD.Howeverlateheis 26、Heisoneofmypreviousstudentsandalwayscomestoseemewhenever________. A.heisconvenientB.hewillbeconvenient C.itisconvenienttohimD.itwillbeconvenienttohim 27、Duringthereconstructionofthecity,manymoderntallbuildingswentup______oldshabbyhousesweretorndown. A.which　B.inwhatC.inwhich　D.where 28、difficultywemeetwith,wemustfinishitontime,becausetheopportunityisvaluable. A.Whatever,thatB.However,such C.However,soD.Whatever,such 29、Only______ahumanbeing. A.whenisithungryalionwillattack B.whenitishungryalionwillattack C.whenitishungrywillalionattack D.whenisithungrywillalionattack 30、IwassurfingtheInternet______thattheChineseweightlifterLiPingbroketheworldrecord. A.whensuddenlycamethegoodnews B.whilethegoodnewscamesuddenly C.whensuddenlydidthegoodnewscame D.whilesuddenlycamethegoodnews 31、Thisisaveryinterestingbook.I’llbuyit,_____. A.howmuchmayitcostB.nomatterhowitmaycost C.howevermuchitmaycostD.whatevermayitcost 32、Thisisaveryinterestingbook.I’llbuyit,_____. A.howmuchmayitcostB.nomatterhowitmaycost C.howevermuchitmaycostD.whatevermayitcost 33、ThisnewEnglishEnglishdictionaryisusefulforme.________，I'llbuyit. A.HowmuchmayitcostB.Nomatterhowitmaycost C.HowevermuchitmaycostD.Howmayitcost 34、________thepoemasecondtime，themeaningwillbecomeclearertoyou. A.YourreadingB.Whilereading C.IfreadingD.Whenyouread 35、—Wasit11o'clock________yourfathercamebacklastnight? —Yes，heisalwayscomingbacksolate. A.thatB.whileC.whenD.until 36、________itis，theboyneverseemstobeabletofinishitoff. A.HoweverinterestingabookB.Whateverinterestingabook C.HowinterestingabookD.Whataninterestingbook 37、_______youmayhave,youshouldgatheryourcouragetofacethechallenge. A.HoweveraseriousproblemB.Whataseriousproblem C.HoweverseriousaproblemD.Whatseriousaproblem 38、Bythetimethetraffic______,wewillhaverunoutofgas. A.clearsB.clearedC.willclearD.hasbeenclearing 39、______,Iwillstandbyhersideandfaceuptoittogether. A.Howeveraseriousmistakeshemaymake B.Howevershemaymakeamistake C.Whateveraseriousmistakeshemaymake D.Whateverseriousamistakeshemaymake 40、　　　　,aslongasI’mwithnature,Idon’tcare. A.Howevertoughthejourneyis B.Whatevertoughthejourneyis C.Howeverthejourneyistough D.Whateverthejourneyistough/js/editor20150812/themes/default/images/spacer.gif

Whichtwowordsareclosestinmeaning?<br/><b>cycle</b><b>，</b><b>hawk</b><b>，</b><b>convey</b><b>，</b><b>extort</b><b>，</b><b>peddle</b><b>，</b><b>summon</b>

设A{a,b}，则P(A)×A = (   )。 A: A B: P（A） C: {<Φ,a>,<Φ,b>,<{a},a>,<{a},b>,<{b},a>,<{b},b>,<A,a>,<A,b>} D: {<a,,Φ,>,<b,,Φ,>,<a,{a}>,<b,{a}>,<a,{b}>,<b,{b}>,<a,A>,<b,A>}

以下哪段代码可以将A,B的值互换（） A: A=A^B; B=A^B;A=A^B B: A= A^B;A=A^B;B=A^B C: B= A^B; B=A^B; A=A^B D: B=A^B; A= A^B; A= A^B

若集合A={a，b}，B={ a，b，{ a，b }}，则（）。 A: A⊆B，且A∈B B: A∈B，且B⊆A C: A⊈B，且A∉B D: A∉B，且A⊈B

设论域D={a,b}，与公式[img=504x85]17d6234b6469e12.png[/img]等价的命题公式是（ ） A: (A（a）∧A（b）) → (B（a）∧B（b）) B: (A（a）→B（a）)∨(A（b）→B（b）) C: (A（a）∨A（b）) → (B（a）∨B（b）) D: (A（a）→B（a）)∧(A（b）→B（b）)

设论域D={a,b},与公式[img=126x21]17da63121bb0ede.png[/img]等价的命题公式是( ) A: (A(a)∧A(b)) → (B(a)∧B(b)) B: (A(a)→B(a))∨(A(b)→B(b)) C: (A(a)∨A(b)) → (B(a)∨B(b)) D: (A(a)→B(a))∧(A(b)→B(b))

优学院: <p class="MsoNormal"> <b>一人造地球卫星到地球中心</b><b>O</b><b>的最大距离和最小距离分别是</b><b>R</b><b>_A</b><b>和</b><b>R</b><b>_B</b><b>．设卫星对应的角动量分别是</b><b>L</b><b>_A</b><b>、</b><b>L</b><b>_B</b><b>，动能分别是</b><b>E</b><b>_KA</b><b>、</b><b>E</b><b>_KB</b><b>，则应有</b><b>&nbsp;</b><b>&nbsp;&nbsp;&nbsp;</b><b>&nbsp;[ &nbsp;</b><b>&nbsp;&nbsp;</b><b>&nbsp;]</b><b><o:p></o:p></b> </p> <p class="MsoNormal"> <b><br> </b> </p>

设个体域D={a，b}与公式∀x A(x)∧∀xB(x) 等价的命题公式是( ) A: (A(a)∧A(b)) ∧(B(a) ∧B(b)) B: (A(a)∨A(b)) ∧(B(a) ∨B(b)) C: (A(a)∧A(b))∨(B(a)∧B(b)) D: (A(a)∨B(a)) ∧(A(b) ∨B(b))

设A=ía,bý,B=í1,2,3ý,求:A×B,B×A,A×A,B×B和(A×B)∩( B×A)。