2023学年中考数学全真模拟预测试题（含解析）

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21ὃᙊḄåᔠ⚪6ᐰ±²³´Ḅᑨ¶.ឋ¯6³²³´æ×Ḅ6çèp¶ᳮ6ä²³´Ḅᑨ¶.ឋ¯.éåᔠ⚪6ᑖêëì.⚪ᑖ1᧕»NOCB=NB,ᵫᩩïNDOE=NB_`NOCB=NDOE,ðñ`ᑮ½COF᪆U±Ὺ²³´pFÏFH_LOC,ᚖøH,᝞1,ᵫ±Ὺ²³´Ḅ²ᔠI_)*CH,᧕»½CHFs^BCA,ðñ_)*CF.2⚪⌕)“½OMN.½BCOä”Ýþᨵᢣ
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22...ZFOC=ZOCF..,.FC=FO..•.COFPUῪWXY.=F>FH_LOC,ᚖBCH,᝞E1,VFC=F0,FH±OC,.•.CH=OH=]ZCHF=90°.2VZHCF=ZB,ZCHF=ZBCA=90°,.,.CHF^ABCA.•CH=CFBCBAVCH=i,AB=1O,BC=6,2,,.CF=25.6/.CFḄ6Cᙊ.6(2)জdOMNs^BCO,᝞E2,ᑣᨵNNMO=NOCB.VZ0CB=ZB,J.ZNM0=ZB.•;ZA=ZA,i.AAOM^AACB.•AO=AMACABVZACB=90°,AB=1O,BC=6,.•.AC=8.

23VA0=5,AC=8,AB=10,.\AM=25.48.CM=AC-AM=I.4ঝdOMNS/\BOC,᝞E3,ᑣᨵNMNO=NOCB.VZ0CB=ZB,J.ZMN0=ZB.,ZZAC0=ZA,.,.CON^AACB.•••ON=-C--N=CO.BCABACVBC=6,AB=10,AC=8,C0=5,.\0N=15,CN=25.44=M>MG_L0N,ᚖBCG,᝞E3,VZMN0=ZB,ZM0N=ZB,ZMN0=ZM0N..\MN=M0.VMG±0N,ᓽNMGN=90°,.•.NG=OG=1I8VZMNG=ZB,ZMGN=ZACB=90°,i.AMGN^AACB.•GN=MNBCAB•.•GN=U,BC=6,AB=10,8

24.,.MN=25.8.*.CM=CN-MN=25-25=25.488.,..CMḄ6PIᡈ9/aOMNBCOrs.482t⚪ὃwxyXWXYz{|Ḅ}Uz{Ḅ~ஹUῪWXYḄᑨ&ឋஹrsWXYḄᑨឋஹᳮUὃwxᑖḄ,"UῪWXYḄW}ᔠ~WXYrsrᔠPIt⚪Ḅᐵ.25.(14ᑖ)(2023•)᝞Eᙠ☢yXᙶ᪗ᱥ}y=ax2tbx+4x£Ḅ~¤¥CA(-2,0),y£Ḅ¥CC,
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25(2)¬=B,CḄy}1<ᱥ}¥M,x£¥N,.GB,C,M,NC⚔Ḅ¯{YP°¯{Y/45MḄᙶ᪗8(3)dDᙠx£|ᙠᱥ}|Pᔲ²ᙠP,´µaPIM)¯ZiPBC?d²ᙠ,y·ᑏ5PḄᙶ᪗8d¹²ᙠº»ᳮᵫ.ὃi¼§ᦪ½ᔠ⚪.ᓰ/ஹஹஹ•ᑖ(1)I᪆«À²ᙠy=ax2+bx+4,ᡃÂ#◤⌕᪷ÅᱯÇÈ45a,bᓽ᪆.0.ᵫ
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{°ÍrU.CÀMN஻BC,ᡠGMN=BC,ᓽMஹNḄÏÐ᝞BஹCÏÐᐵᑣ0ᑖ2%YজNᙠMÑÒÓᓽMᔣÒ°4¤ᓫÏᔣÑ2¤ᓫÏNÖᔠ8ঝMᙠNÑÒÓᓽNᔣÒ°4¤ᓫÏᔣÑ2¤ᓫÏMÖᔠ.CMᙠᱥ}0×ᙶ᪗C(x,-1XMX+4),᧕µNᙶ᪗.ᵫNᙠx£|ᡠGᐸ42Úᙶ᪗C0,ᑣ0µᐵxḄÓÛ7"45x,45MḄᙶ᪗.(3)´PBDgZ^PBC,᧕ὃ⇋NCBDḄᑖ}ᱥ}Ḅ¥.Þᑖ}0CBC=BD,0>UῪABCD,ᑭᵨW}ᔠ~4ᐸ}ᡠᙠÓÛ7

26"ᱥ}ὶâµÓÛãI5Pᓽ0.II&(1)•ᱥ}ä=a*^^+4¥x£A(-2,0),å:.\0=4a-2b+4,•••
¦£Px=3,i.-2=3,ᓽ6a+b=0,2a$ᐵaஹbḄÓÛὶâIµa=-Xb=3,42.••ᱥ}Cy=-42+çx+4.42(2)•.•¯{YC°¯{YÍBC஻MN,.\BC=MN.জNᙠMÑÒÓᓽMᔣÒ4¤ᓫÏᔣÑ2¤ᓫÏNÖᔠ.×M(x,-1X2+-?X+4),èijN(x+2,-lx2+.?x),4242TNᙠx£|-2x2+A=0,42Iµx=0(MCÖ.ᔠìí)ᡈx=6,••XM=6,AM(6,4).ঝMᙠNÑÒÓᓽNᔣÒ°4¤ᓫÏᔣÑ2¤ᓫÏMÖᔠ.×M(x,-2X2+.?X+4),ᑣN(x-2,-AX2+-X+8),4242•iNᙠx£|i.-AX2+-?X+8=0,42

27Iµx=3-Fiᡈx=3+FLX=3-Flᡈ3+V41.M.*.M(3-V41,-4)ᡈ(3+«^,-4)½|ᡠÈMḄᙶ᪗C(6,4)ᡈ(3-᝞-4)ᡈ(3+â1-4).(3)V0C=4,0B=3,.,.BC=5.᝞ïPBDðPBC,ñòBD=BC=5,iDᙠx£|C(-2,0)ᡈ(8,0).জ.DC.(-2,0)/ó·CD,=B>y}BEᑖNDBC¥CDE,¥ᱥ}P”P2,/PBCZ^PiBD,APBC^APBD,22VBC=BD,ECCDḄ,ᓽE(-1,2),×=E(-1,2),B(3,0)Ḅy}Cä=1«+13,èIJõ-k+b,lo=3k+bIµBE&y=-3x+ç.22×P(x,y),ᑣᨵ&,y=--jx2+|x+4

28^=4+726fx=4-V26Iµ_1+V26>ᡈV26-l>k-2-õ2~ᑣPJ4+<_l+ý,PJ4-ῖÿ
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CD,BBFᑖNDBCCDF,ᱥP3,P4,!ᓃAPBCg%P3BD,AP.BC&APiBD3VBC=BD,FCDḄ+,ᓽE(.4,2),2E(4,2),B(3,0)Ḅ3=1«+13,ᑣ.=4k+b,I0=3k+b;<=2,[b=-6BFAy=2x-6.y=2x-62P(x,y),ᑣᨵi23;