2021-2022学年黑龙江省哈尔滨九年级（上）质检数学试卷（12月份）（五四学制）（附答案详解）

《2021-2022学年黑龙江省哈尔滨九年级（上）质检数学试卷（12月份）（五四学制）（附答案详解）》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

2021-2022
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!"EFஹAFஹBE,EFᑖÍÊ48ஹBDஹMஹK,4F=BE,'{BK=KE(3)᝞3,ᙠ(2)yᩩ´w!"4EÊC஺ÇLÉ8Eஹ4CÊÇN,ÒBN=7,AL=5Ó'CNḄ.4⚓ᐳ20⚓

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(MḄßᙶ᪗ᜧÇt),!"PM,PDḄᚖHᑖ6ÊÇF,ÊPMஹN,#cosDPO=—,PN=3MNÓPM'mḄ..I23

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ᦪḄú☢\ûôüýᦪḄ»ïᦪ.2.ூvᫀ௃DூÛ᪆௃Û{Aஹ2a2+4a2=6a2,ᡠ;A⌱⚗mÿBஹ(a+I/=a?+2a+1,ᡠB⌱⚗Cஹ(a2)3=a6,ᡠC⌱⚗Dஹx7-T-%5=x2,ᡠ஺⌱⚗.ᦑ⌱D.᪷ᔠ⚗Aᑨ᪷ᐰ8ᑨ᪷Ḅ!ᑣCᑨ᪷#ᦪ%Ḅ◀!!ᑣ஺ᑨ.'⚪ὃ*+ᐰ(a-ᓃ)2=.2±20+2.3ὃ*+ᔠ⚗ஹ4Ḅ5#ᦪ%Ḅ◀!!ᑣ.3.ூ8ᫀ௃Bூ;᪆௃;Aஹ=>?@AB=CD?@ABᔠ⚪E8ஹ=>?@AB=CD?@ABFᔠ⚪ECஹ=>?@AB=CD?@ABᔠ⚪E஺ஹ=>?@AB3=CD?@ABᔠ⚪E.ᦑ⌱B.᪷>?@AGCD?@AḄᭆIJ;.'⚪ὃ*+CD?@AG>?@AḄᭆI.>?@AḄᐵL=MN?>B@AOPᑖᢚSTUVᔠCD?@A=⌕MN?CDBXY180ZTOPᑖVᔠ.4.ூ8ᫀ௃Aூ;᪆௃;[ᱥ]y=/Ḅ⚔_ᙶ᪗b(0,0),[ᱥ]y=(x+3)2+4Ḅ⚔_ᙶ᪗b(-3,4),_(0,0)◤⌕ᐜᔣfg3hᓫjBkᔣlg4hᓫjmᑮ_(-3,4).••[ᱥ]y=/ᐜᔣfg3hᓫjBkᔣlg4hᓫjmᑮ[ᱥ]y=(x+3)2+4.ᦑ⌱A.[ᱥ]Ḅgr⚪Bstl=⚔_ḄgBu[ᱥ]Ḅ⚔_b(0,0),gTḄ[ᱥ]⚔v6⚓Bᐳ20⚓

6_b(-3,4),ᵫ⚔_Ḅgz{|[ᱥ]Ḅgz{.}⚪ὃ*~ᦪGᣚr⚪BᙠMN@AḄgz{B◤⌕@AḄgz{ᳮ;bhᱯ_Ḅgz{.5.ூ8ᫀ௃Dூ;᪆௃ூᑖ᪆௃'⚪ὃ*ᓫᔠḄ@Bᳮ;@Ḅ|=;8ḄᐵL.᪷@Ḅ|ᔠᔠᓽUᑨ.ூ;8௃;Ḅ@=D.ᦑ⌱D.6.ூ8ᫀ௃Dூ;᪆௃;•.•_P(—1,3)ᙠᦪy=+,-0)Ḅ@lBk--3o=Z?;mk=-3,ᦑ⌱D._Ḅᙶ᪗ᐭᦪ;᪆BᓽUJk.'⚪ὃ*+ᦪḄ@l_Ḅᙶ᪗ᱯBmᐵkḄ=;}⚪ḄᐵL.7.ூ8ᫀ௃Bூ;᪆௃ூᑖ᪆௃'⚪ὃ*+ᑗ]ḄឋtB£A᜜£ឋtB£Aᑁ£¦|ᳮB§Ὺ£AឋtḄ©ᵨB;}⚪ḄᐵL=J«4OCḄZᦪB⚪¬®B¯Z〉C.᪷ᑗ]ḄឋtJN04C,ᔠa=40°JN40C,᪷§Ὺ£AឋtJNB=BDO,᪷£A᜜£ឋtJᓽU.ூ;8௃;•••4C=O஺Ḅᑗ]B.AOAC=90°,vzC=40°,:.«4OC=50°,vOB=OD,:.Z-ABD=BDO,•••Z.ABD+(BDO=4AOC,«²)~25஺Bᦑ⌱B.8.ூ8ᫀ௃C

7ூ;᪆௃;••³´ABCµḼ_Cᢥ¸┐ᔣXY20஺BZ.ACA'=20°,■0A'CLAB,•••AA+^ACA'=90°,•••AA=70°,ᵫXYºB^B'A'C=^A,^B'A'C=70°,ᦑ⌱C.᪷XYḄឋtmNB'AC=3᪷£Aᑁ£¦=180஺JḄZᦪᓽU.'⚪»⌕ὃ*XYḄº¼B½¾¿ÀXYḄឋt5£Aᑁ£¦Ḅº¼=;⚪ḄᐵL.9.ூ8ᫀ௃CÁ;᪆Á;•.ÂÃAABCDbÄAB•••AD//BC,CD//AB•••DE//BC,~%=◨Bᘤ=ÈBᡠ⌱⚗ÉBC⌱⚗┯ËBCFBDEDF••DF//AB..Ì=ÍᡠA⌱⚗ḄÉAEABADBF——,AEBE2BC=AD,•ᘊ=Ñᡠ஺⌱⚗ḄÉ.BEAEᦑ⌱C.ᐜ᪷ÄAḄឋtmAD஻BC,CD//AB,k᪷]ᑖ]Óᡂ|ᳮBᵫDE஻BCmᑮ2=ÕBᘤ=ᑣU8ஹCᑨᵫ"஻4Bmᘤ=×BᑣUABCFBDEDFAEABᑨᵫÈ=ᘤBᑭᵨBC=4D,ᑣU஺ᑨ.BEAE'⚪ὃ*+]ᑖ]Óᡂᩩ]ÚOᩩÛ]BᡠmḄ©]ÓᡂB½Ü|ᳮ=;⚪ḄᐵL.10.ூ8ᫀ௃Cூ;᪆௃;ᵫ⚪EBmÝÞßàá@â✂ḄäZb1500+20=75(m/min)ÝÞß@â✂åàḄäZb1500+(70-55)=100(m/min).ᦑ⌱C.᪷⚪EUºÝÞàG@â✂Ḅæçb1500ᓛá@â✂é+20ᑖêBåᩭᵨ+15ᑖêBk᪷“äZ=í+î”ᑡñòᓽUJ;.v8⚓Bᐳ20⚓

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ᳮᑭᵨᑖ⚪⚪Ḅᐵ.20.ூᫀ௃18ூ᪆௃᝞஺!DF14B"#,•••AD=BD,DF1AB,AB=2BF,LDFB=90°,•••4c=90°,•zC=Z.DFB,vZ.CAE=B,•.4CAEsுFBD,FBDB—=----,CAEA•AD=BD=13,AE=4V13,BF_13_gAC-47n-4•.BF%C,■■-AB=^AC,ᙠRfABC(,sinB=^=

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ᳮ⚪Ḅᐵ.21.ூᫀ௃pq=r+(t|+-17)a—2a—2a—21a—1a—2a—21a—2Q—2Q—11a-lfxa=2sin60°+V3tan30°=2x}+V5x/=8+l,rs-p-116pq==j=Z.ூ᪆௃ᐜ᪷ᑖqḄᔠkᑣᓄpqVᔠᱯ┦bḄᦪSJaḄHᐭᓽZ.⚪⌕ὃ]ᑖqḄᓄS⚪ḄᐵhiᑖqḄᔠkᑣᱯ┦bḄabᦪ.22.ூᫀ௃(1)᝞cABE#ᓽ?ᡠS.(2)᝞;CDGᓽ?ᡠS.12⚓ᐳ20⚓

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14%+25=125.#AᵨᐹḄᓫ100ᐗ8ᵨᐹḄᓫ125ᐗ.2
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%&'AᵨᐹF(ᑣ&'Bᵨᐹ40-GH(᪷15=ᓫxᦪ36ᔠ&'AஹBJᵨᐹḄ5KLMNO4400ᐗᓽ<=ᐵ?஻?ḄRᐗRSMTABUᐸWḄᨬXYᓽ<=6D.Z⚪ὃ\]ᑖAḄ^ᵨ_`RᐗRSMTAḄ^ᵨ⚪Ḅᐵa.1
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kl᝞n1,opOC,••q4BCTrstu,AB=AC=BC,Z-BAC=B—Z-ACB=60°,•••AAOC=2B=120°,•••OA=OC,‘⊈C="C4=y#=3஺஺,♦(OCD=LACB-LOCA=60°-30°=30°,••BAD=^BAC-/,OAC=30°=^CAD,
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