在y=ax2+bx+c中，当x=0时，y=2，当x=-1时，y=0，当x=2时，y=12，则a、b、c的值分别为[]A.1，2，3B.3，2，1C.2，3，1D.1，3，2-七年级数学

更多内容推荐

• 下列方程组中是三元一次方程组的是[]A.B.C.D.-七年级数学
• 已知求b的值．-七年级数学
• -七年级数学
• Modern science has given clear evidence____ smoking can lead to many diseases.[ ]A. whatB. which C.
• Many experts stick to the view ______teacher development is the key to the education quality. [ ]A.
• 当x=1，3，-2时，代数式ax2+bx+c的值分别为2，0，20，求：（1）a、b、c的值；（2）当x=-2时，ax2+bx+c的值。-七年级数学
• There is clear evidence_____the most difficult feeling of all to interpret is bodily pain.[ ]A. what
• 已知，xyz≠0，求的值。-七年级数学
• 由方程组，可得x+y的值为[]A.14B.-14C.2D.-2-七年级数学
• ___________a terrible storm would take place in Hainan [ ]A Word came which B. Word came that C. Wor
• When the news came ______ the war broke out, he decided to serve in the army.[ ]A. since B. whichC.
• Modernsciencehasgiven clear evidence____ smokingcan lead to many diseases.[ ]A. what B. which C. tha
• The senior three students in our school received word last week_____some excellent students hadbeen
• A story goes____Elizabeth I of England liked nothing morethan being surrounded by clever andqualifie
• News came from the school office ________Wang Lin had been admitted to Beijing University. [ ]A. whi
• The fact has worried many scientists _______the earth isbecoming warmer and warmer these years. []A.
• 由方程组可得，x∶y∶z是[]A.1∶2∶1B.1∶（-2）∶（-1）C.1∶（-2）∶1D.1∶2∶（-1）-七年级数学
• 已知方程组，则x+y+z的值是[]A.0B.1C.2D.3-七年级数学
• The news has spread all over the country____________the spaceship succeeded in returning to the eart
• There is much chance_________ Bill will recover from his injury in the time for the race. [ ]A thatB
• Danby left word with my secretary____he would call again inthe afternoon.[ ]A. whoB. thatC. asD. whi
• 解方程组最简便的方法是[]A.用代入法先消去xB.先用①+③消去x、z，求出y值C.用③-②，②+①消去zD.先用③×②-②消去y-七年级数学
• Dean left word with my secretary__________ he would call back in the afternoon. [ ]A who B thatC.asD
• She lay in her bed and had the feeling_______ nothingwould make her sleep. [ ]A. what B. which C. of
• We should consider the students' request_____the school library provide morebooks on popular sc
• 解方程组，得x=（），y=（），z=（）。-七年级数学
• 已知，且，则a=（），b=（），c=（）。-七年级数学
• 若，那么代数式x+y+z=（）。-八年级数学
• Awarmthoughtsuddenlycametome____Imightusethepocketmoneytobuysomeflowersformymother'sbirthday.[
• 解方程组，得a=_________，b=_________，c=_________．-八年级数学
• -It's thirty years since we last met.-But I still remember the story,believe it or not,_____we
• 同义句转换。1.LiMingworkshard.Thefactiswellknowntousall. _____ LiMing_____iswellknowntousall. 2.Hefailedth
• The patient’s son asked the doctor the question________his father could survive the big operation.[
• -It's thirty years since we last met.-But I still remember the story, believe it or not,_______
• Professor Fish made the remark __________ it doesn’t make much of a difference to one’spersonality _
• "Super Girl" may have gone, but it has left young people with the belief they are confiden
• 如果，其中xyz≠0，那么x：y：z=[]A．1：2：3B．2：3：4C．2：3：1D．3：2：1-八年级数学
• Many newspapers printed the governor's statement _____ would support a tax cut. [ ]A. and he B.
• 解方程组，得x=_________，y=_________，z=_________．-八年级数学
• 解三元一次方程组，则x=_________，y=_________，z=_________．-八年级数学
• There is much chance____Bill will recover from his injury intime for the race.[ ]A. thatB. whichC. u
• 已知方程组，则x+y+z=（），x=（），y=（），z=（）。-七年级数学
• The fact ________ this country spends more on its military than on education and health carecombined
• -Is there any possibility_________ you could pick me up at the airport? -No problem. [ ]A. whenB.tha
• Mr Smith asked the boy a question_____ he could go to theconcert with him. [ ]A. whetherB. that C. w
• The mother was filled with anxiety ______ her daughter might be disabled by the accident.[ ]A. wheth
• 已知3x+y+2z=28，5x-3y+z=7，求x+y+z值。-八年级数学
• 已知关于x，y的二元一次方程组的解x与y的值互为相反数，则m=（）-七年级数学
• 已知关于x、y的方程组的x、y的值之和等于2，则m=（）．-七年级数学
• Tomorrow is Tom's birthday. Have you got any idea____theparty is to be held?[ ]A. whatB. whichC