甘肃省张掖市2021-2022学年中考数学模拟试卷（三模）含解析版

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22Bூὃ1௃:#$#ḄBᵨ-D#E#ᡂ*F:#$#ḄBᵨ-ᚁ@ᚁ#ᡂ*.25.᝞./ᙠI☢:#ᙶ᪗M;/%ᦪᡝkx+bḄ.SᑖTUxVஹyV3AஹB[1/\]^m_%ᦪ`=bḄ.SU3CஹD[1/DE/xV31E,ghC1Ḅᙶ᪗i(6,-1),DE=3.(1)(]^_%ᦪ\%ᦪḄ᪆lF(2)(4CDEḄ☢n.ூᫀ௃(1)y="-,y=-gx+2F(2)12.x2ூ᪆௃ூ௃⚪ᑖ᪆(1)ᑖ᪆⚪q/gh1Cᙠ]^_%ᦪḄ.Sr/sC1ᙶ᪗tᐭ]^_%ᦪḄ᪆l;ᓽ,ᑮwḄx/ᵫDEḄz@(1஺Ḅᙶ᪗F|[1Ḅᙶ᪗tᐭ%ᦪᓽ,(%ᦪḄ᪆l.(2)0஺2CHLxV31”/᪷SA8£=SAar+SAD/ᕒᓽ,(☢n.⚪᪆(1)•.•1஺(6,-1)ᙠ]^_=b.Sr/Xm.sx=6,y=-ltᐭ]^_᪆l—1=”.ᓽw=-6,6...]^_᪆l7y=x•.•1஺ᙠ]^_%ᦪ.Sr/DE=3,ᓽDᙶ᪗73,23⚓/31⚓

23sy=3tᐭ]^_᪆l3=-9ᓽX=-2,X.•.1Z)ᙶ᪗7(-2,3).6k+b=I<:᪆l7=+6,s஺\஺ᙶ᪗tᐭ“.b2%+6=3./\k=~~2b=2.%ᦪ᪆l7y=-x+2.(2)0஺2CH_LxV31”/3%ᦪஹ=-gx+2.y=0,(x=4,ᦑ/(4,0),ᵫQᙶ᪗(-2,3).ᑮᐺ-2,0),AE=OA+OE=6,26.᝞./1஺/EᑖTi6/8C(ᓽ48,BC,NC)Ḅ648,ZCḄ;1.1஺iZBCᡠᙠI☢rḄ1/஺8,OC,1G,FᑖTi08,0cḄ;1/1஺,G,F,E.(1)᝞./1஺ᙠ48CḄᑁ¢£/(¤56஺GFEiI¥56F(2)¦56஺GFEi§/ᑣ஺/\8c¨©ª«᪵ḄᦪᐵM¯(:ᑏᫀ/◤(▊³ᳮᵫ)24⚓/31⚓

24Aூᫀ௃µ1
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VDsEᑖTi6ABஹACḄ;1.F.DE஻BC,DE=-BC.2Ãᳮ/GF/7BC,GF=-BC.2F.DE஻GF,DE=GF.56DEFGiI¥56F2
10Ḅᙢ¸©ª[¹⌕(AO=BC,10ᙠ»CDஹ»BEr.AO,ᵫµ1
56DEFGiI¥56/■:D,G,ÄᑖTi/ÅOB,OCḄ;1/.GF=-BC,DF=-AO,22AO=BC£/GF=DF,56OGFEi§.25⚓/31⚓

25ூ1Æ௃Ç⚪⌕ὃÈ$#Ḅ;¸¼ᳮ/I¥56ஹ§Ḅᑨ¼/I¥56Ḅᑨ¼ÉឋiÊ;ᦪËḄ/ÌÍ3᦮¹Ê;ᦪËḄËÏ/i;ὃ;^ÐѶḄhÒ1/ÓÔÕ@ᜧ,◤Ö×ØÙ.27.᝞./ABi஺஺ḄÚ/D70AÛÜḄrb1/0D2CD_LOAUÚAB31E,U஺஺31F,CE=CB.1
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30஺µ3
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01C2CGLBE3G,᪷Ὺ$#ḄឋᑮEG=^BE=5,ᵫ[#Ḅ$#ê2ë/AADE^ACGE,ᑭᵨêë$#¨#ᑮsinNECG=sinA=2/ᙠRtZ\ECG;/ᑭᵨ26⚓/31⚓

26ìí¼ᳮ(CGḄz/᪷$#êëᑮ^_l/tᐭᦪᓽ,ᑮ¾î.⚪᪆(1)0B,VOB=OA,CE=CB,.\ZA=ZOBA,NCEB;NABC,ïYCDLOA,:.ZA+ZAED=ZA+ZCEB=90°,AZOBA+ZABC=90°,AOB±BC,BCi஺0ḄᑗF(2)᝞.1,OF,AF,BF,VDA=DO,CD±OA,/.AF=OF,VOA=OF,/.OAFi6$#/.\ZAOF=60°,AZABF=—ZAOF=30°2(3)᝞.2,01C2CG_LBE3G,VCE=CB,1AEG=—BE=5,227⚓/31⚓

27VZADE=ZCGE=90°,ZAED=ZGEC,AZGCE=ZA,.,.ADE^ACGE,EG5HnAsinZECG=sinA=——=—,ᓽCE=13,CE13ᙠRtAECG;/VCG=7C£2-£G2=12,VCD=15,CE=13,ADE=2,VAADE^ACGE,.AD_DE•.=,CGGEbDE24♦♦AD=------CG=;tGE548F.஺0ḄÛÜ0A=2AD=y~.ὃ11ஹᑗḄᑨ¼F2ஹêë$#Ḅᑨ¼\ឋ28.᝞./ᙠI☢:#ᙶ᪗M;/ghABCDḄ$¹⚔1B(1,0),C(3,0),D(3,4).ñA7⚔1Ḅòᱥy=ax2+bx+c01C.1Pô1Aõ/ö÷ABᔣ1BB.ã1Qô1Cõ/ö÷CDᔣ1DB.1P,QḄBù@ᙳ7ûü1¹ᓫ¸.Bþÿt
.PPE_LABACE.(1)ᑏAḄᙶ᪗ᱥḄ᪆(2)EEFJ_ADF,ᱥG,t4ACGḄ☢!(3)ᙠ#P,Q$#Ḅ%&tᙠ'(ABCDᑁ(ᒹ,-.)0ᙠH,12C,Q,E,H⚔Ḅ4-(5(6ᑏtḄ.728⚓/:31⚓

2820ூ?ᫀ௃(l)A(l,4)y=-x2+2x+3(2)t=2SAACGḄ1:(3)Oᡈt=20-8R.ூ᪆௃ூᑖ᪆௃(1)᪷U'(ḄឋWX2ᑏAYᑮᙶ᪗ᵫ⚔AḄᙶ᪗X\]ᱥḄ⚔^%y=a(x-1)2+4,ᯠabCḄᙶ᪗dᐭᓽXYgᦪaḄ(ᑭᵨklgᦪmᱥḄ᪆)(2)ᑭᵨklgᦪmYACḄ^%y=-2x+6ᵫo(pᙶ᪗qᣚX2YPḄᙶ᪗(1,4-t),UtX2YEḄvᙶ᪗bᐸdᐭAC^%X2YEᡈGḄyᙶ᪗ᯠaᱥ^%ஹo(pᙶ᪗qᣚX2YGE=t-{ஹAᑮGEḄ|}~CIJGE42t12Ḅ|}2-᪷U(Ḅ☢X2YSAACG=SAAEG+SACEG=—1(t—2)~+lᵫ{ᦪḄᨬX2Yt=2SAACGḄ1;(3)ᵫ5(-ḄR4-(ᡠ2HᙠEF.ᑖCE-ᓽX.ூ௃(1)A(1,4).ᵫ⚪\ᱥ᪆y=a(x-1)2+4•ᱥC(3,0),.0=a(3-1)2+4,Ya=-1..ᱥḄ᪆y=-(x-1)2+4,ᓽy=-x2+2x+3.(2)\ACḄ᪆y=kx+b,VA(1,4),C(3,0),4=k+bk=—2,¥=60=3k+bACḄ᪆y=-2x+6.•P(1,4-t),,by=4-tdᐭy=-2x+6&YEḄyᙶ᪗X=1+.tt2••GḄyᙶ᪗1+~dᐭᱥḄ᪆&XGḄvᙶ᪗4-{.2422.*.GE=(4——)-(4-t)=t——.44729⚓/:31⚓

29©AᑮGEḄ|}ªCᑮGEḄ|}2-322SAACG=SAAEG+SACEG=,EG-+EG(2-3)=EG=t-9~;«-2)~+1..•.t=2SMCGḄ1.(3)ᵫ⚪\(2)¬C(3,0),Q(3,t),E(l+-,4-t),\H(I+-,m).22CE᝞o1,ᨵCQ=HE=CH,ᓽm=4-2t{4m2-3t2-8t+16=04²4-2t³2-3t2-8t+16=013t2-72t+80=020Yt=3ᡈt=4²µ¶tC,E·ᔠ³.13CE-᝞o2,ᨵCQ=CE=EH,ᓽ§I-----------------m=4~j+²4~tº=t'{t2-40t+80=0t2-40t+80=0Yt=20-8¼ᡈt=20+8/²µ¶t½¾'(ABCDḄ³.onÅᡠÆt=wᡈt=20-8/ᙠ'(ABCDᑁ²ᒹ,-.³0ᙠH,12C,Q,E,H⚔Ḅ4-(5(.730⚓/:31⚓

30731⚓/:31⚓