2022-2023学年浙江省宁波市中考数学专项提升仿真模拟卷（一模二模）含解析

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10
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17ᓝè234KèMOøJèᦪᨵ:23,24,32,34,42,43.পJèᦪᏔᦪḄᭆ᳛)34.63(2)Jèᦪ6ḄòᦪḄᭆ᳛)Ll:m⚪û⌕ὃoḄüᭆ᳛Ḅ<ÃᑣýþÑẠ⚪
.᪷⚪᪛⚪Ḅᐵ.20.᎝""⌱!"#ᐹ᝞1ᡠ'()Ḅ*ᱥ.,᫏AC.CDḄ/ᑖ145cm,60cm,23456ᚖ89ᩚCEḄ/20cm;A,C,Eᙠ=(ᩩ8?@2/CAB=75஺᝞2.(1)B,᫏ADḄ/C(2)B9;Eᑮ,᫏ABḄFG.(HIᑮ1cm.KὃᦪNsin750="0.966,"cos75°=0.259,tan75°=3.732)ூPQRᫀ௃(1)75cm(2)63cmூU௃N(1)ᙠRtz^ACDVAC=45,CD=60,AAD=7452+602=75'W,᫏ADḄ/75cm.(2)X;EEF_LAB,ᚖY;F,FGEF=AEsin75°=(45+20)sin750=62.7835=63....9;Eᑮ,᫏ABḄFG63cm.Z18⚓/]61⚓

18^1`ᙠRtAACDVᑭᵨhijᳮBADᓽm.^2`X;EEF1AB,ᙠRtZ^EFAVᑭᵨuvwᦪBEF=AEsin75஺ᓽm~ᑮRᫀ.21.ᙠ“⇼ᓭ”ᦈ8ᔴmᑭ100ᐗ#ᜩm#8ᔴᔴmᑭ800ᐗC᝞I#ᜩm#1ᔴᔴmᑭ4000ᐗ.ᵫᩩᜩᵨ(¡¢#⌕B¤ᙠ(ᨴᑁ^30ᜩ`¤¨ᢇ93ᔴᐰ¬.ᔆ/¯°±#²³´±#µ¶᝞·#¸ᔠº.ᵬ¼N¤ᐰ¬#½C¾¼N30ᜩ¿#À#Ḅ8CÁ¼N30ᜩVmᵨÂᜩ#ÃᵨÂᜩ#½CÄÅᔆ/ÆᵨÇȼḄÉᑭÊூPQRᫀ௃^1`74400ᐗC^2`126300ᐗC^3`ZuᑭூU௃ᑖ᪆N^1`ஹΤᐰ¬#½ᑣᑭ93x800ᐗC^2`ஹ30ᜩ¿#ᑣm#30ᔴmᑭ30x4000,À#Ḅ63ᔴ8mᑭ63x100,Ñᐳᑭ30x4000+63x100C^3`ஹ30ᜩVmᵨÂᜩ#ÃᵨÂᜩ#½ᑣm᪷“ÔÕ30ᜩ”“ᐳ93ᔴ”ᑡ¡×ØR.U:^1`Τᐰ¬#½,ᑣmᑭ93X800=74400ᐗ;^2`30ᜩ¿#m#ᦪÜ30ᔴÔᑭ30X4000=120000ᐗÀ#Ḅ63ᔴ8mᑭ63X100=6300ᐗÑᐳᑭ30X4000+63X100=126300ᐗC^3`Ýxᜩ#yᜩ#ᑣß+à3஺á~â18x+y=93ly=21ᡠ9ᜩ#ᦪÜ9X8=72ᔴmᑭ72X800=57600ᐗ21ᜩ#ᦪÜ21ᔴmᑭ21X4000=84000,Ñᐳᑭ141600,ᡠ^3`>^2`>^1`,ᓽZuᑭ.;äN⚪ᐵå*▭Å⚪çèᑮ¡×ØVᑭᵨ¡×ØᩭêÅ⚪ëìẠ⚪
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=12,...ri2=4,/=-3á%,.1"ᱏ-2á%,ᑣᙊḄ³´2.7ã⚪Wᑗ®ḄឋånᑨPὃçῪϼÐḄឋå¾ᑗ¼Ḅឋå2ÖϼÐḄឋånᑨPf⚪ḄᐵWᑨéNOBC+/OBA=90°,W=³´.24.¯°7êÐ48848=4,8C=3,MஹNᑖoᙠº48ஹC£Ç®3/ëêл¼®4cE,ÙìÇ®"NíᢚNïᙠðᜐ¬ðᙠò®C8.প᝞1,^EPJ_BCS=CMḄó`(2)᝞2,^EP_L/CS=4஻Ḅó`(3)õᑏp®÷CPḄóḄ~tùú^C7ḄóSMNḄó.821⚓/&61⚓

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252022-2023ḕὃᦪ⚗ᓣᔁpஹ⌱p⌱¹Ê⚪ᐳ16ᑖÌ⚪2ᑖº²ᑡᔜ⚪ᙳᨵÐL⌱⚗ᐸÓᨵpLTÔᔠ⚪ÖḄ.1.ᙠ2018×ØÙÚÛÜÝÞßàᜧᦪஹâÙã¶äᐵæçᦪèḄᰦêPêëᡃíâÙã¶ᙠ2017èîᩭêëḄ“ñᵨᐗè”⚜õ2020èíâÙã¶᪶¾÷øùúû1500üᐗ150000000000ᵨᦪ⊤A.1.5x102B.1.5xlO10C.1.5x10"D.1.5xl0122.᝞!ᦪ"#-Ḅ%&'ᦪᑣ(ᦪxḄ)*,&)X-+1A.x>2B.x<2C.xr-1D.x<2.X3-13.0ᑡᔜ"345Ḅ&A.a+2/=3/B./c.6/#-a4D.(a2)3=a14.ýþ^äḄ{ÿ

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35ZAOB=360°-120°-108°=132°,x.AO=BO,AZABO=ZBAO=(180°-132°)+2=24஺.ᦑ⌱A.,-./0“$qAEḄyᑁ{5CஹqAEḄ᜜{r360°~CῪ{EḄឋ”$%;<=⚪Ḅᐵ?.5.᝞JᡠKḄJEZ☢$ḄJB.ூ$%<ᫀ௃Dூᑖ᪆௃᪷J☢ḄJᫀᔜ⌱⚗Ḅ☢ḄJᫀᑖ᪆ᑨᓽj.ூW;௃A./⌱⚗Ḅ▢$EḄ⚔,ᨵᙠ▢{EḄA,FJᨵ",ᦑᨵjN:B.8⌱⚗Ḅ▢$EḄ⚔,ᨵᙠ▢{EḄAFJᨵ",ᦑᨵjB;C.C⌱⚗ḄḄ☢ᨵ▢J¡Jᨵ☢ᨵ▢J¢ᡠᨵjC.D.D⌱⚗Ḅᨵjaᑮ᝞JᡠKḄJᡠjD;ᦑ⌱D.=⚪ὃ¤¥¦§Ḅ¨©ª«¬;=⚪Ḅᐵ?®ẚ*°±$ḄJᱯ³.6.ᦪ´ᑖµᨵAஹBஹC,¶·Ḅ¸ᦪᑖµaஹbஹc¹º»bc<0,ᑣ¼,Ḅ½¾u36⚓/w61⚓

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40ூIJKᫀ௃5ூfd௃ᑖ᪆gᵫ஺0ḄøùCDᚖøûAB>E,AB=8YcBE=4,¥OB=x,ᑣᵫCE=2Yc0E=x-2,ᵫÖᙠRtZ\OBEᵫᳮxḄᓽᑮOBḄ.•஺0ḄCDᚖABE,AB=8,.BE=4,ZOEB=90°,OB=x,ᑣOC=x,VCE=2,**.0E=x-2,••ᙠRL^OBEOB2=OE2+BE2,.••X2=(X-2)2+42,x=5,.,.0B=5.ᦑ5.$ᵫ“ᚖᳮ''ᑮBE=4,'ᵫ(ᵫᳮᙠᙠRt^OBEᐸ“*0B+,-.ᦪḄ”12345⚪Ḅᐵ8.14.9᪥,;<=>?℉ABCDEF100ᝅஹAIJKF80ᝅᐳᵨN12000ᐗABCDEFPᝅQAIJKFPᝅR16ᐗSABCDEFTAIJKFPᝅᔜRVᐗWIJKPᝅxᐗᑡ,.ூ234ᫀ௃100(x+16)+80x=12000ூᑖ᪆௃ᵫ⚪^=>IAIJKFᐳ_`N80xᐗ=>ABCDEFᐳ_`100(x+16)ᐗᯠb᪷d=>AIJKF_`Ḅe+=>ABCDEF_`Ḅe=12000ᓽᑡghiḄN.ூ௃AIJKFPᝅxᐗ᪷d⚪^j41⚓/m61⚓

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