浙江省台州市临海市中考数学一模试卷(解析版)

浙江省台州市临海市中考数学一模试卷(解析版)

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12AḄÃ(2)ᑖELAஹBQ:Ḅᙶ᪗ᓽᑮjèA8Ḅ¢.ூ௃(1)•.•Çᦪy=xḄ'é:(2,W,=2,.P(2,2),••Çᦪy=k(x>0)Ḅ'é:P,X'.Z=2X2=4(2)y=4zᐭy=x,x=4,.••:A(4,4).y=4zᐭ)=êx=i,.♦.:8(1,4)..".AB=4-1=3.ூ:;௃<⚪ὃ?yᑭᵨë»ìᦪCEÇᦪ᪆FÄÇᦪ'é:Ḅᙶ᪗ᱯí⚪îït:ᙠ'é:Ḅᙶ᪗ñv»òóÇᦪḄ᪆.20.ூᑖ᪆௃(1)᪷ôõḄGö»ឋᓽ÷ø⚪.(2)iiᵫ⚪tAAoWL2Xsin2O°X8,ᵫÍᓽ÷ø⚪.ூ௃(1)ὃ?yôõḄGö»ឋ.ᦑᫀ!Gö».(2)ᵫ⚪tA4oW1.2Asin2O°X8=3.264«=3.3(ú)xûüýþ(A4o)Ḅᨬᜧ3.3.ூ௃⚪ὃḄᵨῪḄឋḄឋ⚪Ḅᐵ!"#$%&'ὃ(ὃ⚪).21,ூᑖ᪆௃(1)'-ᦪᦪ/ᢥ᯿23ᑮᜧḄ56᣸ᑡ-&ᦪ/'9-:Ḅᦪ;(2)᪷/=>ᙳᦪ@AᓽCDᑮEFG(3)᪷/H'ḄIJKᓽC.ூK௃;Q)2MNCDOPHᦪ/Ḅ'-ᦪ-&஺HGᦑKᫀ;D-,

13(2)(1.45X2+1.55X3+1.65X7+1.75X9+1.85X4)+25=1.69()GK;a᪥cdḄ>ᙳef1.69G(3)ghiᳮᵫ;H'Pl3HḄᨬ3nᨬᜧḄ>ᙳᦪ᝞pqD,EuHḄH'ᑖvᵨ1.70஻?n1.90஻z{|ᣚ>ᙳᦪ~ᦑghi.ூ௃⚪ὃ⚣ᦪᑖMNḄ⚪Ḅᐵᱞ@A;⚣᳛=⚣ᦪ+ᦪ.22.ூᑖ᪆௃(1)᪷/ᙊᕜIᳮ=O᪷/>{ḄឋnῪḄឋDONA8O=/BA஺ZABO^ZBOC,ZBAO+ZAOC=\SO°,ᓽCDOKᫀG(2)=OBOCQOC,᪷/ᐰḄឋDOBC=CQ,᪷/Iᳮ=OCQᓽC.ூK௃(1);..•ḄᙊᕜNACB,Ḅᙊ/AOB,ZAOB=2ZACB,'OB=OA,.NA80=NBAO,,JAB//OC,.ZABO=ZBOC,ZBAO+ZAOC=180°,.•.N8AO+/AOB+/BOC=180°,ᓽ2NACB+2NBOC=180°,AZACB+ZBOC=90°G(2)¡¢AO£஺஺&£>,¦§C£>,ᑣNACQ=90°,22=22=6)ᵫIᳮD;^=7AD-ACV(5+5)-8OC//AB,.ZBOC=ZABO,ZCOD=ZBAO,

14,/NBAO=ZAHO,:.NBOC=NCOD,ᙠnOOC''OB=OD{ḄឋIᳮῪḄឋᙊᕜIᳮ®ᔠ°ᵨz{±ᳮ²⚪Ḅᐵ.23.ூᑖ᪆௃(1)³CDN´µ¶·ᱥC¹⚔A᪆A»ᐭ(0,1.8)C=GIh-h,||h-hi|(2)ᑖv½¾¿r<3Â-j——Ḅn¿f>3Â-j——ÇḄ2ÈCÉᑨÊG|t-tj||t-tj(3)PÍÎÏÐ◞/.4ÒÓÔlÓÏÕÐlÓÏÕḄÖ{×ØᰦÚÂḄfÛᙳÜcDÝÓÏÕḄÞᦪ᪆AßÝlÓnÝÓÏÕḄ᪆AÜ2È=OàὅfÛÜḄÂ9â»ᐭÞᦪ᪆AᓽCDÂ92ÈDfÛzlã~CDEF.ூK௃;(1)³᝞äNᡠæᐸN´èé·ᱥᦑC¹ᐸ᪆A"=a(L3)2+19.8,í(0,1.8)»ᐭD;1.8="(0-3)2+19.8,.\a=-2,.h=-2(?-3)2+19.8,ᦑÜḄÞᦪ᪆A;h=-2(Z-3)2+19.8,

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16ঝg8Njᨬᜧmn•.•4MஹN+mnABḄpqᑖᒘ4BIM+MN2r+32=5,®ᡠ°%ᡈ5ᦑ$ᫀj%´ᡈ5(2)᝞H2,yBM=x,•ABCD+¡.AD=BC,AD//BC,jBCḄE4.BE=CE=—AD,2'AD//BE,XAMDsEMB,,BM.BE1••µe¶.\DM=2xfDN=a,ᑣMN=2x-m••4M,Njmn8஺Ḅpqᑖᒘ4ᙠ[:জgBMj¸%BM2=MN2+DN2,x2=(2x-a)2+a2,3x2-4U+2஺2=0,=16#-24a2=-842V0,¼^ᦪLঝgMNj¸%MN2=BM2+DN2f(2r-a)2=x2+a29x=0(½)ᡈ4/.BN=x+2x-a=3x-a=3X—a-a=3af9AB//DFf

17用BDF-BNDN213aaDFDF=7ঞgONj¸%DN2=BM2+MN2,x2=2x-a2+a2,x=0¿½Àᡈ5:.BN=3x-CI=^~Q-஺=Á஻^AB//DF,.AB_BN*'DF^DNÆA21Ta,DF=15,®OFḄÉj7ᡈ15¿3জPCḄÉ+rW2,ᳮᵫ+%᝞HEPAஹPN,MPA4Ê⌮┐`90°;LPNF,ÊAC4P⌮┐`90஺;4PFE.ᑣN1=N3,Z2=Z4,A8C+ËῪͨ[¨AC=2,:.AB=?M

18,:NANM=NPNF=45°,:.NBNF=9O0,BF2=BN2+FN2,;4A,BាÐ+mnMNḄpqᑖᒘ4¿ABA4MNBN,.AB2=AM2+BN2,:.BF=AB=CE=2&,ᵫ`%PC=PE,NCPE=90°,.9CPE+ËῪͨ[¨ঝ᝞H3,ÑC¥CkLABᓃÑP¥PU_LABU,H3CV=^AB=-J2,ᵫ⚪Ó%PUWPC+VC=2+M

19,ñ᦮ᦪ‘᦮ᦪôᨵᳮᦪö÷᦮ᦪᨵ▲ùᦪᡈ¼▲úû4ᦪ^ᦪö'ñᑖᦪᑖᦪ.÷ᑖᦪ'ñ¼ᳮᦪ¼ᳮᦪ¼▲üúûùᦪ÷¼ᳮᦪ1ஹᨵᳮᦪ%ýþÿᨵᳮᦪᑏᡂ"ḄᐸpஹqḄ᦮ᦪᨵᳮᦪḄ⌕ᱯq஺2ஹᳮᦪ⍗ᑮḄᳮᦪᨵ"#$%&Ḅ'᪷᝞⊈ஹV4-ᱯ./᪀Ḅ%▲2▲3ᦪ,᝞1.101001000100001...-ᱯ.9:Ḅᦪ,᝞nஹsin45°@஺3ஹᑨCDEFᦪḄᦪឋ%HIJ⊤☢MḄNOPP⌕QR᦮ᳮᓄTUVW/X஺YஹFᦪḄZEᭆ\1ஹ]^ᦪ_ᨵ`a%bḄcEᦪdef]^ᦪ஺(1)FᦪaḄ]^ᦪ-a-(2)akbf]^ᦪOa+b=02ஹ᎔ᦪ(1)Fᦪa(aWO)Ḅ᎔ᦪL-(2)akbf᎔ᦪ04s=1-(3)t90uᨵ᎔ᦪa3ஹvwx(1)DEᦪaḄvwxᨵW"#yza,a{0|=«0,a=0-a,ay0(2)FᦪḄvwxDEᦪᦪMDEFᦪḄvwxᦪM⊤EᦪḄᑮḄ஺(3)ᣵvwx`a(ᓄT)⌕wvwx`a☢ḄFᦪᦪឋ(ஹ)ᣵvwx`a஺4ஹn'᪷(1)'᪷'᪷a20,daḄ'᪷ஹdaḄ'᪷஺(2)ᦪḄ'᪷ᨵcEf]^ᦪ-0Ḅ'᪷0-ᦪuᨵ'᪷஺(3)'᪷dFᦪaḄ'᪷஺(4)DEᦪᨵDEḄ'᪷-஺Ḅ'᪷0-DEᦪᨵDEḄ'᪷஺"ஹFᦪ¡ᦪ1ஹᦪ¢.£ஹ'ᔣஹᓫ¦§¨Ḅ©ªfᦪ஺ஹ'ᔣஹᓫ¦§¨ᦪḄ"⌕«஺2ஹᦪMḄkFᦪḄw¬ᐵ®ᦪMḄ¯DE°⊤DEFᦪ±¯DEFᦪ°ᵨᦪ

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32+P(x,y)ᙠyBjoxk0,yklmGᦪ஺3.+P(x,y)ᙶ᪗Ḅopmq,(1)+P(x,y)ᑮxBḄstu|y|$(2)+P(x,y)ᑮy⋀Ḅstu|x|$(3)+P(x,y)ᑮ;+Ḅstu+Ḅ4.ᐵxᙶ᪗Bஹ;+HyḄ+Ḅᙶ᪗ḄᱯU,প+P(a,b)ᐵxxBḄHy+u4({-6)$(2)+P(a,b)ᐵxxBḄHy+u|(—a,/?)$(3)+P(a,b)ᐵx;+ḄHy+u|(-a,-A)$eஹ}ᦪḄᭆ1ஹE,ᙠ-ᓄPQᦪḄ$ᢝᦪPḄ஺2ஹ}ᦪ,-ᙢᙠ-ᓄᨵ@xEy,᝞HxxḄ-yᨵ-ḄHMxuyuxḄ}ᦪ஺(1)Ḅu,জ᪆£u¤¥ᨵ-Ḅ᦮£Ḅ}ᦪuᐰ¨Gᦪ஺ঝ᪆£u¤¥ᨵ-Ḅᑖ£Ḅ}ᦪu«ᑖ¬Pk0ḄGᦪ஺ঞ᪆£u¤¥ᨵ-ḄᏔ¯᪷£Ḅ}ᦪu«±²³ᦪ´µḄGᦪ஺¶m,ᙠ·}ᦪḄ¸᝞⍗ᑮG▭»⚪¼½¾«G▭»⚪ᨵmq஺(2)}ᦪ,¿ᙠᑁḄ-ᡠÁḄ}ᦪḄHM஺(3)}ᦪḄ⊤ó,জ᪆$ঝᑡ⊤$ঞÅÆ(4)ᵫ}ᦪḄ᪆£È}ᦪḄÅÆ-ÉÊu,জᑡ⊤$ঝË+$ঞÌÍgஹoᱯÎḄ}ᦪ1>-¯}ᦪḄ}ᦪ᪆£ÑÆឋÐ2ÕÒÓÔy=kxᐰ¨▼}ᦪ(k#0)Gᦪr0c>0k<0জÖk>0¸yḄÚᜧÜkV0¸y22ḄÚᜧÜJ,b>04×Ø<0=0y=kx-¯ᐰ¨+b}ᦪGᦪ1(k#0)\b=0k:>00b<0k<1ÍRSk,bḄᐵ5:

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38n+ஹ±+±§¨@²³´µḄ¶«ᭆ¸±Ḅᜧᱯl“”¢“ᔣX¼▲¾¿”஺Àஹ±ḄឋÂ+nᨵᩩ±%ÄÅᨵᩩ±±ḄᩩឋÂ:eᳮḄÆfÇtḄÈÉ0+nᨵÄÅᨵᩩ±±ÊËÅᨵËn஺1ஹ̱Ḅ´µ+±Cn¢ÍzḄÎḄÏᑖÐṈ̃஺2.̱Ḅᱯl+“ᔣX¼▲¾¿ÍᨵÒnÓஹ±M+1ஹ±MḄ´µ+±Cn¢ÍÔÕḄÏᑖÐѱMnÐѱMḄÒn஺2ஹ±MḄឋÂ(eᳮ)+ᡠᨵÖ×nḄ±@±MᨬØ஺ஹ±MḄ@n+1ஹ´µ᝞1—1@nBÙ±MACᑖᡂᩩÊÚḄ±MnBÐѱM11ACḄ@n஺2ஹ⊤Û£+VAB=BCABC...nB0ACḄ@n1—1ᡈAB=-MAC2.,.nB0ACḄ@nᡈÜAC=2AB,.,.nB0ACḄ@nÝÔÞᡂß:nB0ACḄ@nÜ.AB=BCᡈ•.•nB0ACḄ@nAB=-AC2ᡈ+nB0ACḄ@nÜ.AC=2BCáஹE1EḄâ´µ+--âᨵeᐳÒnḄᩩ̱ᡠᡂḄÆÐÑE஺⌕åæ´µ@ḄçnজEᵫᩩ̱ᡂḄÆÜঝᩩ̱êëᨵeᐳÒn஺ìâᩩ̱íḼÒn1AïðñᑮìAïᡠÆᡂḄÆ஺:4tᙠòóAïḄ̱ôõöAïḄ̱÷ÆᡂøE஺/B2.EḄ°ᑖ±´µ+ᩩ̱ÙEᑖᡂÊÚḄE/ᩩ̱ÐÑEḄ°ᑖ±஺⊤Û£ᨵdâ+᝞12/(1)/AOC=NBOC(2)ZA0B=2ZA0C=2ZC0BQA1-2ZAOC=ZCOB=-ZAOB2úஹEḄF^+F^EḄᜧ>ᵨ“F”û0F^ᓫA஺Ùᙊᕜᑖᡂ360ÚþÿḄ஺1=60ᑖ1ᑖ=60஺ஹḄᑖ(1)┦Ḅ┦(2)Ḅ(3)ᜧḄ(4)ᩩḼḄ!Ḽ"#ᔣ%&'()*+,-.*+ᡂ0,ᡠᡂḄ஺(5)ᕜᩩḼḄ!Ḽ"#ᔣ%&'(4,.45ᔠ0ᡠᡂḄᕜ஺

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