北师大版八年级数学下册期中试卷及答案

1201504401.A|9|(9)B+(+2)+(2)C3232D23232.ABCAB=6cmBC=2cmACA8cmB4cmC8cm4cmD3.A.B.C.D.4.2111331,,,;,22xxyaxxymA.5B.4C.D.5.A211xB92xC52yxD025x6.)0,0(22yxyxxxy3A.9B.3C.D.7.325xA5B4C3D28.ykx1(0)kykx9.0a1,A11aaB11aaC11aaD11aa10.ykxbkb0kyykxb20kxbAx-3B0xC2xD0x4041.x21,.2.1111xx=___________.3.,AC4.m6m85.1xcxx52c=6.OA=OBA____________.7.3a2)(ba,ba22______8.04322bababa9.453010.y=kx+48____________(1070)1.2+b2b+32bb=2.52.3225332xxxx,.53.41-30-1-2-4231BAa413amn26bnm236m24n2mxabnxba2x22x21x2124x24.yx,5)2(.2)1(,32myxmyxyx,,m.5.y253,7.236yytyty3,2,1,0,1t.56.1212ABCDMABDEABEABCBMBFF11EABDEEFDEEFEADNNEBF22EABADNNE=BFDEEFABCDEMF1NFFABCDEMF27.(8)11,2abab(1)(a-b)2(4)(3)a(a+b)(a-b)-a(a+b)2(4)8.10)(h)x(km)yyxkm1B_______________12BCyxx3DCDCDBCBAA1.2x2-x?2.2/x2-13.100m4.16m5.46.27.548.4-19.10cm210.y=x+4ABCDOy/km90012x/h41.02.x-13.13m-n2a+2b2)4(n+3m)(n-3m)3)x(a-b)(m+n)4)2(x-1/2)25x+12x-14.5.t=8/36.281DEEF-----------------------------------------------------1NE=BF------------------------------------------------------2ABCDADABDAECBM900NEADABDN12ADAE12ABDNEB------------------------------------------------3RVtANEANEAEN450DNE1350BFCBMFBM450EBF1350DNEEBF-------------------------------------------4FBMDEA900ADEDEA900FBMADE--------------------------------------------5DNEEBFDEEFNEBF------------------------6(2)ADANAENE---------------107.1)32)18.900km4)/(7512900hkm)/(150129004900hkmy=225x-900(4x6)