【分析解答题】 JJ79. 好像是三种不同颜色的车(a,b,c)比例为2:5:4，c比a多1300，问b有多少
【单选题】thE Following DAtA suFFiCiEnCy proBlEms Consist oF A quEstion AnD two stAtEmEnts, lABElED (1) AnD (2), in whiCh CErtAin DAtA ArE givEn. you hAvE to DECiDE whEthEr thE DAtA givEn in thE stAtEmEnts ArE suFFiCiEnt For AnswEring thE quEstion. using thE DAtA givEn in thE stAtEmEnts plus your knowlEDgE oF mAthEmAtiCs AnD EvEryDAy FACts (suCh As thE numBEr oF DAys in july or thE mEAning oF CountErCloCkwisE), you must inDiCAtE whEthEr
A、stAtEmEnt (1)AlonE、is suFFiCiEnt, But stAtEmEnt (2) AlonE is not suFFiCiEnt.
B、stAtEmEnt (2)AlonE、is suFFiCiEnt, But stAtEmEnt (1) AlonE is not suFFiCiEnt.
C、Both stAtEmEnts togEthEr ArE suFFiCiEnt, But nEithEr stAtEmEntAlonE、is suFFiCiEnt.
D、EACh stAtEmEntAlonE、is suFFiCiEnt.
ｅ. stAtEmEnts (1) AnD (2) togEthEr ArE not suFFiCiEnt.
is 3x grEAtEr thAn 100
(1) 9x=36
(2)
A、stAtEmEnt (1)AlonE、is suFFiCiEnt, But stAtEmEnt (2) AlonE is not suFFiCiEnt.
B、stAtEmEnt (2)AlonE、is suFFiCiEnt, But stAtEmEnt (1) AlonE is not suFFiCiEnt.
C、Both stAtEmEnts togEthEr ArE suFFiCiEnt, But nEithEr stAtEmEntAlonE、is suFFiCiEnt.
D、EACh stAtEmEntAlonE、is suFFiCiEnt.
ｅ. stAtEmEnts (1) AnD (2) togEthEr ArE not suFFiCiEnt.
is 3x grEAtEr thAn 100
(1) 9x=36
(2)
【单选题】Drug usE Among tEEns ConCErns mAny pEoplE inCAliForni
A、ADvoCAtEs oF thE "stopDrugs now" progrAm, whiCh wAs pilotED in puBliC sChools in FivECAliForniA CountiEs lAst yEAr, ArguE thAt thE progrAm shoulD BE usED throughout thE stAtE to DECrEAsE Drug usE Among tEEnAgErs.
whiCh oF thE Following stAtEmEnts, iF truE, woulD most strEngthEn thE ArgumEnt oF thE ADvoCAtEs oF "stopDrugs now" thAt thE progrAm shoulD BE ExpAnDED stAtEwiDE
A、sChool progrAms ArE FAr lEss importAnt thAn pArEntAl mEssAgEs in inFluEnCing A tEEnAgEr’s DECision to usE Drugs.
B、Drug usE Among tEEns in thE FivE CountiEs whErE thE "stopDrugs now" progrAm wAs pilotED hAs BEEn Dropping stEADily For ovEr A DECADE.
C、tEEnAgErs At thE puBliC sChools whErE thE "stopDrugs now" progrAm wAs pilotED rEportED highEr AvErAgE lEvEls oF Drug usE thAn DiD tEEnAgErs At privAtE sChools in thE sAmE CountiEs whErE thE progrAm wAs not pilotED、
D、thErE is EviDEnCE thAt tEEnAgErs who stArt smoking At An EArly AgE ArE morE likEly to ExpErimEnt with illEgAl Drugs thAn tEEnAgErs who Do not smokE.
E、thE pErCEntAgE oF tEEnAgErs who rEportED using Drugs At thE sChools whErE thE "stopDrugs now" progrAm wAs pilotED DroppED morE in thE lAst yEAr thAn in Any othEr yEAr ovEr thE lAst DECADE.
A、ADvoCAtEs oF thE "stopDrugs now" progrAm, whiCh wAs pilotED in puBliC sChools in FivECAliForniA CountiEs lAst yEAr, ArguE thAt thE progrAm shoulD BE usED throughout thE stAtE to DECrEAsE Drug usE Among tEEnAgErs.
whiCh oF thE Following stAtEmEnts, iF truE, woulD most strEngthEn thE ArgumEnt oF thE ADvoCAtEs oF "stopDrugs now" thAt thE progrAm shoulD BE ExpAnDED stAtEwiDE
A、sChool progrAms ArE FAr lEss importAnt thAn pArEntAl mEssAgEs in inFluEnCing A tEEnAgEr’s DECision to usE Drugs.
B、Drug usE Among tEEns in thE FivE CountiEs whErE thE "stopDrugs now" progrAm wAs pilotED hAs BEEn Dropping stEADily For ovEr A DECADE.
C、tEEnAgErs At thE puBliC sChools whErE thE "stopDrugs now" progrAm wAs pilotED rEportED highEr AvErAgE lEvEls oF Drug usE thAn DiD tEEnAgErs At privAtE sChools in thE sAmE CountiEs whErE thE progrAm wAs not pilotED、
D、thErE is EviDEnCE thAt tEEnAgErs who stArt smoking At An EArly AgE ArE morE likEly to ExpErimEnt with illEgAl Drugs thAn tEEnAgErs who Do not smokE.
E、thE pErCEntAgE oF tEEnAgErs who rEportED using Drugs At thE sChools whErE thE "stopDrugs now" progrAm wAs pilotED DroppED morE in thE lAst yEAr thAn in Any othEr yEAr ovEr thE lAst DECADE.
【单选题】What is the twenty-third decimal to the right in the fraction
A、1
B、2
C、3
D、4
E、5
A、1
B、2
C、3
D、4
E、5
【单选题】已知-2x2+5x+C≥0的解为
则C为()．
则C为()．【单选题】如果数列an)的前n项和
那么这个数列的通项公式是()．
那么这个数列的通项公式是()．【单选题】甲、乙二人各投篮一次，已知甲投中的概率为0.8，乙投中的概率为0.6，则甲乙二人恰有一人投中的概率是()．
A．0.36
B、0.44
C、0.48
D、0.68
E、0.72
A．0.36
B、0.44
C、0.48
D、0.68
E、0.72
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