2023河北石家庄高三4月质检英语参考答案

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Suddenlysomebarks(i)camefromthedistance."It'sthatdogFollowingthebarks,wefoundmattiecurlingupunderafallenpinetree.thatdogwaswithmattie,wrappingaroundherlikeabearskinrug.Mawasalltearsandscolding.Dadgaveherhugsandkisses.Mattiespokeup,"Wetookthewrongroad.ThenIfellandhurtmyfootsoIcouldntwalk.PrettyDogstayedwithmeandkeptmewarm.Hekeptlickingmyface.Iknewhewastellingmewedbefound.IdontrememberwhichoneofusstartedcallinghimBravedogbutthatwashisnamefromthenon.Hebecameamemberofthefamilyasanyofuswas

C2:(x-1)2+(y+2)2=54分22.解:(1)曲线曲线C1派点点在:轴上长半长是小时国为一5分(2)曲线C1:g+X=1与z轴的交点坐标为(-4,Q)和为m>0,所以点P的坐标为(4.0分然切线的斜率存在设为则切线的单为们创+3=,擦得①k2+1所以切线l的方程为y

7.B【解析】本题考查点、线、面的位置关系,考查空间想象能力与推理论证能力对于选项A,当a,b都平行于a与B的交线时,a∥b,所以A为假命题对于选项B,3bCa,aCB,a⊥b,所以B为真命题若a⊥a,a∥B则a⊥B,由b∥B,可得a⊥b,所以C为假命题若a∥n,acp,anB=b,则a∥b,所以D为假命题

1.A【解析】因为M={x|x≥2},N={x12 0,所以当x∈(号,2时,总有f(x)>0质为<12023河北石家庄高三4月质检英语参考答案