天津市滨海新区2022年中考数学一模试卷（含答案与解析）

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20ூ᪆௃ூᑖ᪆௃(1)᪷5ᜩḄᦪᡠᓰḄ®ᑖ¯|᪵±Z²ᦪᵨ6ᜩḄᦪ◀`²ᦪᓽ5{Ḅ;(2)᪷ᦪஹᦪᙳᦪḄ¶Mᑖ·ᓽ5;(3)ᵨghiḄᦪ¹`lmnoCpqr¤¥ᜧ<7ᜩḄjkᦪᡠᓰḄ®ᑖ¯ᓽ5.ூP௃S(1)^»¼z{|᪵±ZḄjkᦪS28+35%=80(),/»%=—x100%=20%,ᑣ஻?=2080ᦑᫀS80,20(2)•••ᙠᦪ5Êf28^ÊḄ^ᦪᨬÌ,ᦪḄᦪ5•••ÍᦪᢥÏ;ᑮᜧḄÐÑ᣸ᑡᐸᜐ<¥ḄKLᦪÔ[6,ᨵÕ2=6,2ᦪᦪ6un%&nz-uRH-5x28+6x16+7x20+8x8+9x8Þßᩩá&x=--------------------------------=6.4,80/.ᦪḄᙳᦪ[6.4(3)•••ᙠ80§jklmnoCpqrḄ¤¥ᜧ<7ᜩḄᦪ¯ã20%,/.ᵫ᪵ᦪ¢¡v2000§ghijklmnoCpqrḄ¤¥ᜧ<7ᜩḄᦪ¯ã¨20%,<[ᨵ2000x20%=400().¡v2000§ghijklmnoCpqrḄ¤¥ᜧ<7ᜩḄᦪ¨400.ூEX௃⚪å⌕ὃZfᡧá&ᩩá&ᦪஹᦪஹmᩗᙳᦪḄ¶`aᵨ᪵¢²éḄêë.ᐵe[ìIÏ&íîìI.21.ᙠAABC`ïðḄO஺ᑖ·óôAC,BCD,E,DE=BE.(1)᝞&জNCø=38°,NCḄᜧ;(2)᝞&ঝúEEü஺OḄᑗþÿA8ḄF,ACG,NC=52°,

21Ḅᜧ.ூᫀ௃(1)71°(2)26°ூ᪆௃ூᑖ᪆௃(1)"#AE$᪷&'='()=᪷&ᙊᕜ,-ᳮ()NE4C=NE4B=gNCAB,ᡠ0)ᑮNE4C=19஺$᪷&“45ᡠ6Ḅᙊᕜ,790஺”()NA£C=NA£B=90஺$᪷&4,9,:Ḅឋ<ᓽ()ᑮNCḄᜧ(2)"#AE$OE,᪷&ᑗḄឋ<()N஺■=90°,᪷&ᙊᕜ,-ᳮ()NE48=@NC4B=26஺$AB)ᑮ/£84ḄDᦪ$᪷&FῪ9,:Ḅឋ<()NOEB=N£B4,HB()NBEFḄᜧ.ூI௃J(I)᝞L$"#AE.DE=BEDE=BE-5.ZEAC=ZEAB=-ZCAB.2NC4B=38஺$NE4c=19°.*/A8M஺஺Ḅ45$/.ZAEC=ZAEB=90°.5.NC=90°-NE4C=71°.(2)᝞L$"#AE,OE.

22*/GRM஺஺Ḅᑗ$ZO£F=90°.,ZZC4B=52°,ZEAB=-ZCAB=26°.2ZEBA=900-ZEAB=64°.OE-OB5.ZOEB=ZEBA=64°.5.ZBEF=NOEF-NOEB=26஺.ூW௃X⚪ὃ[\ᙊᕜ,-ᳮ$ᑗḄឋ<$4,9,:Ḅឋ<$FῪ9,:Ḅឋ

23DAC=-Xtan22°DCᙠRtZXDBC$tan/Z)BC=—BC•••᠄AC-AB+BC!._2^__2^30+•tan22°tan58°'.30xtan22°xtan58°30x1.60x0.40”..DC=--------------------------n--------------------=16.tan580-tan22°1.60-0.40JijᱥCDḄlDM16m.ூW௃X⚪ὃ[\4,9,:Ḅᵨ$⌱〉Ḅ4,9,:$⌱ᔠ〉Ḅ9,ᦪ7⚪Ḅᐵf.23.¡☢L£ᡠ¤᧜Ḅ¦§7J¨©ªஹ¬⚶®ஹ¯°±²ᙠ{|ᩩ4~.¨©Aª³´ᒴ¶·¸¹¯°±$ᙠº»¼½\|¾¿ÀÁ$Âᒴ¶¸Ã¹¬⚶®ᔛ¬⚶$ᯠÁᒴ¶ᦣ¸Çᑮª$ᐸx⊤ʨ©Ë̪Ḅ¿À$y⊤ʨ©ËªḄÍË.y/kmx/ininÎ᪷&ÏᐵÐÑ$¡ᑡÓ⚪:(1)Õ⊤J

24¨©Ë̪Ḅ¿À/min58152040¨©ËªḄÍË/km12(2)ÕÙJজ¨©Aª³´ᑮ¯°±Ḅ¶DMkm/minঝ¨©ᙠ¯°±ÜḄ¿ÀMminঞ¨©A¯°±ᑮ¬⚶®Ḅ¶DMkm/minট¨©ËªḄÍËM0.6ᓟà¿$áË̪Ḅ¿ÀMmin.(3)âIk30¿$Î4#ᑏ³yᐵxḄᦪ᪆ç$ூᫀ௃(1)1.6,2,1.2(2)জ0.2ঝ10ঞ0.08ট3ᡈ55(3)ᖴ/10¿$y=0.2x10<%$20¿$y=220<%,30¿$y=-0.08%+3.6.ூ᪆௃ூᑖ᪆௃(1)ᵫᦪL£Ḅᦪ&vÃ$ᓽ((2)ᵫᦪL£Ḅᦪ&ïL¯ðḄᦪhᐵñ$vÃᑖ᪆ᓽ((3)᪷&⚪ïò-ñᦪóᓽ(.ூI௃(1)ᵫᦪL£)JOWxWlO¿$öy=or,ù(10,2)úᐭ)2="10,)a=0.2,.•.OWxWlO¿$y=0.2x,.•.x=5¿,y=lx=8¿$y=1.6x=20¿$y=2"x=40¿$)$=1.2JᦑᫀMJ1.6,2,1.2(2)ᵫᦪL£ᔠ⚪)J2জ¨©Aª³´ᑮ¯°±Ḅ¶DMm=0.2km/minঝ¨©ᙠ¯°±ÜḄ¿ÀM20-10=10min2-12ঞ¨©A¯°±ᑮ¬⚶®Ḅ¶DM———=0.08km/min30-201.2=40m+nট40

25m=-0.04n=2.8...20cxW30y=-0.04x+2.8,y=0.60.6=-0.04x+2.8,x=55y=0.2x=0.6,3/.!"#$Ḅ&#'0.6ᓟ)*#+$Ḅ,'3ᡈ55min.ᦑ3ᫀ'5জ027ঝ107ঞ0.087ট3ᡈ557(3)ᵫ(1)

26IIᑗAD஺ᐸxYᔣqM4ḄmM'4,M஺ḄmM'M஺ḄmM'O',AOO'=f,stuOBC£>£¤¥ᑖḄ☢§'S.জ᝞Wঝ©qª4஺'஺stuOBCD£¤¥ᑖ«¬tu4஺y®M¯O'D'BCM°±ᵨ³ᨵfḄµ¶⊤aS,·ᑏ¹fḄº»½72Qঝoீ4oSḄº»½·ᑏ¹¿ÀᓽÂ.33ூ3ᫀ௃IM஺Ḅᙶ᪗'0,267IIজS=—6°+3Gr-Å1

27ᵫ஺O'=,8(1,0)ÐAO=AO'-OO'=2-t,BO'=OO'-OB=t-\,ᙠRtDEEOEO=AO•tanZEA'O=(2-r)•tan60°=Ç(2-t).,LE0=gAOOE=7.(2T).G(2T)¥(2T)2.icÚᳮSBF஺,=-BO,FO,=—(t-l)2-^,nrU22'/öSdKD,/3=2y/3.22J7••S=SA'rf'Q'~~S>-SRFO'~2"\/3----(2——I)?,AFOᓽS=-s/3t2+3^--(l

28.S—SS/x2x2b1x4F4G_2H10.-஺0-஺//஺--X2XZ^J--X-x-y--ZVJ-----~,1ᳮ345f=l5=—,2ᓽ<1[05/^,39215?@Q2

29S=S.NDu-SQBFO.=-^x2x273x(r-1).V3(r-l)=273=--^-(r-1)'+2^,•.•«=--<0,£>1SKḄMᜧNOP2y.,-8,0_V3ব63ᨬU;218VW5—>/34S<-A/3.184ூ!Y௃[⚪ὃ^Ḅ_`aḄVᔠ⚪`cdefḄឋhᙶ᪗fᑡ?lmᦪḄo᪆qr?lmᦪḄឋh┦tutmᦪḄvᵨxyzW{|_o⚪Ḅᐵ~.25.{?lmᦪு=2+Ḅx!A,!(0,1),⚔!AC(-l,-2).(1)?lmᦪḄo᪆q(2)AஹC!ACᔣW`a!AஹCᑖ`aᑮ!஺ஹEᜐ.Fᙠ?lmᦪḄWQEE_zEFA£eḄ¤Ὺtutf!¦Ḅᙶ᪗(3){!§¨2<஻<0,!MஹNᑖ_xஹACWḄ¬!PM+MNḄᨬU;A*c஻Ḅ;.4ூ¯ᫀ௃(1)y=-(x+l)--2(2)¦(3,6)ᡈ¦(-5,6ு13(3)n=——ᡈ஻=——.22ூo᪆௃ூᑖ᪆௃(1)ᵫ?lmᦪ)=²++஺Ḅ⚔!AC(-1,-2),3³ᐸo᪆qAµa(x+1)22,¶·!(0-g¸¹ᐭᑭᵨ¼½¾ᦪᓽ3>?lmᦪḄo᪆q(2)ᵫ?lmᦪḄo᪆q>A(1,0)ᡈA(—3,0),¶ᑖ¿ÀÁÂÃ.!CCHLx!H.otACH,4>A”=2=C஻ÅÆ/1=45°,AC=2M.o¤Ὺt4>N2=45°,EF=4,ᵫN1=N2=45°,4ᑮEF||CH||y.ᑭᵨ¼½¾ᦪ>ACḄo᪆qA)=x-l.³

30F\IÉᐸÊËÌ1
,ᑣ!EÉ஻mlÎ,ÅÆEF=஻/-■-=4,oÐÑ>UÒN4I22J22>!¦Ḅᙶ᪗1ᳮ34Ó?FḄᙶ᪗É3
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ᐵxḄÔÕ!P'PNGACN,xM,pP'T||xAC7,ACy!K,P'N_LACPM+MNᨬUᨬU;AP'NḄÖ׶oy¦=a=1ØN34¯ᫀ.ூUÙ1Úo௃o5,?lmᦪ¦o^+bx+cḄ⚔!AC-l,-2
,...3³?lmᦪḄo᪆qA¦ax+1
22,·!¹ᐭ43=4-2,o4a=1,I2J22.•.?lmᦪḄo᪆qAy=gx+2ூUÙ2Úo௃12o5ᵫ5Éx+l
--2=0,4x=—3ᡈx=l,?lmᦪÛÜ+cÉ஻W0
ḄXÝÞ!A,᝞!CC"_Lx!”.•5C(-1,-2),:CH=2,OH=1,ßàACM,:.AH=2=CH,N1=45஺AC=^AH2+CH2=272•

31ᵫ`a345ᙠ¤Ὺt£>£¦ÊDE=DF=AC=2N,ZFDE=90°,.\Z2=45°EF=dDE2+DF?=4,N1=N2=45°,.ᵫA(1,0),C(-1,-2)34ACḄo᪆qA1-1.ᵫ⚪⳦(ã,(ã2+ã1(ᐸÊm>1),ᑣ!å-1),1,3,1,1.\EF--m~+m----m+1=—m"—,2222121—m~——=4,22æ=3,ᔩ=-3(è᪷êᔠ⚪âëì),!¦Ḅᙶ᪗A(3,6)?lmᦪ("0)ḄxèÞ!A,ᑣA(-3,0),6(l,0),ᵫíᱥḄÔÕឋ345F(-5,6).VW5/(3,6)ᡈE(-5,6).ூUÙ3Úo௃o5᝞A(l,0)¦(஻,1)ᐵxḄÔÕ!ᡝ'P'N_LACMxM,pP'T11xACT,AC)!K,••¦,¦ᐵxÔÕ,

32PM=P'M,PM+MN=P'M+MN=PN,P'N_LACPM+MNᨬ,ᨬU;Ap'NḄÖ×,4ᵫACAy=x-l,345KÉ0,—1
,..OA=OK=l,5.NOð=NOAK=45஺.•.NP'77V=N7PW=45஺P'T=42P'N=-,2••yp=yr=L"É2,1
,171=-----2AÉ-3,0ÎᑭᵨíᱥḄÔÕឋ345…3ñ஻=-213VW5n=——ᡈ஻=—.22ூ!Y௃[⚪ὃ^Ḅ_ᑭᵨ¼½¾ᦪo?lmᦪḄo᪆q?lmᦪ¤ῪtutfòḄᨬU;Ù⚪óôḄᑭᵨ?lmᦪḄឋhoõÙ⚪_o[⚪Ḅᐵö