2019-2020學(xué)年吉林省長(zhǎng)春市汽開(kāi)區(qū)八年級(jí)（上）期末數(shù)學(xué)試卷8?()32C.D.D.A.B.③B.a659①②21④1()5A.C.～()A.B.C.D.人人人人12=3()A.B.D.1=3=3112=32=3C.1>()A.B.C.D.><=≤()A.B.C.D.；；；，，ab=．以；ABc以D以Cb；以Daa；C()A.B.C.D.8.A.B.C.D.7979.12)÷．010.11.12.13.2?2=．．2?2+．△=，=，⊥交=E14.15.△===，則，=，=△沿與△G的DE．916.31=?43+1=5．17.???2+2++÷?4?418.、、、=，=．BFCE△．19.4×A20.421.+++，；abs當(dāng)=，=22.ABCA23.，．P=；，AD+與+Q24.△=，=，=DB以．ADt=，；點(diǎn)△Dt1.C3?2=5．．2.C21①②③5．．3.C×=．．4.A1?．?=1?+2=，5.D>b>，<，=>≤．>≤．．6.A=+=．22．7.B[][]以DDaaCb的Bc；+?．．．8.B∵：=．==，=，設(shè)∴=+∵=，=，∴∴=，∴=，D作⊥于，∵是=，∴==，點(diǎn)到D，．B=9.90數(shù)的00)÷=1÷1=，29．10.+?2?2=+?．=2?2=+?，+?．11.××，×．1×0×1≤0<，n12.?2?2)÷+=+?÷+=?，?．13.△=∵⊥，∴∵∴=．=，=．在△和△=={,∴∴∵∴∴△△．=．=，=，=，∴=．14.=的∵=，=，∴==，∵∴=，=，∴=1=．2．15.4+==，∴∴===，?=，∴∵∴∴==，，==，=，=△=+=，2=+2+=4+2，√4+2．√====16.?=，=，==6；?3+=，=，==3．xx17.=2?2；+2?2+=+22=÷+??4=??4+=．18.∵=，∴+==+，∴，∵，∴=，△△=={=，．=，=，，，．19.5C；；√．√√20.x=+4==x21.=+2=2+=+2)?2+++=2++2，+2，2++2)=2+，，=ab2+，把=，==+，2=5×3+3×3×2=，2把=，=22.；?++=，×=．AC=×÷=，；23.=，∵∴∵∴，=，+=，+=，=，△△=，=，=，，∴=，=，∵∴=∵=，∴=，∴=，∵∴==，．+>+．，M=，∵=，∴，=+，∴+>=+=+，>+．，P在=△P=在，M=△得=△+>=+=+24.；當(dāng)∴=當(dāng)=====，；⊥E于212=，則===，在△∴=當(dāng)?=?=，=2222；==，∵∴∴=?=，=?，，==，∴∴=1=，2=，∴=；或或．tss∵在△=，=，=，；∴=+=+=2222作1=12?=12?，∵∴△===；；在△當(dāng)==當(dāng)==當(dāng)=∵=，∴，=+，∴+>=+=+，>+．，P在=△P=在，M=△得=△+>=+=+24.；當(dāng)∴=當(dāng)=====，；⊥E于212=，則===，在△∴=當(dāng)?=?=，=2222；==，∵∴∴=?=，=?，，==，