中考數(shù)學(xué)試卷及評(píng)分標(biāo)準(zhǔn)

中等學(xué)校招生考試3(3)2．5a2a．Welikemathse2ARt△ABCC°，，c，，C，2atanA若b．cb從0yxCBa．43．△ABC是BAD°ABADDCC，DBCAAOEBCBDFP78P，B是O與，B是10POAB．AP，PBOOEAPEOFPBF于，于x22xmx9yx22xm0．yAFx13OOEB9AOB，OAOB在EOB刻度的直尺在圖中畫出AOB63）2y）x(x0y隨x0xy隨x））11）．．BABCDCC處，BC交于E45°）C6個(gè)5個(gè)4個(gè)3個(gè)367CD(1)132sin60°2007．44aABCDEF與MCE，與N．EFMADNCB284123432184Rt△ABCA90°AB，AC6DB，ADDE∥BCACE，段2作交Dy．xyxxx△BDESA（DEBC289ABDCABEDCE③④AD①②△BEC△BECADEBC29(11)B(1)C(D(，6E(F(0，．△ABCPD與PyD沿．l1lP與1lD與Cll122PCD圍成的圖形的面積（結(jié)果保留y3123x1234563ABCDAD3C(5，，；yyyCB(12)CCD(，b)(，b)xxxOOO()()D0)D(0)圖1圖2圖3D4ABCDACC，，fyC)D(，f)(，b)xO圖44CABCD(bB(dC(nD(f)，，，e，，，fx2(5c3)xc（4）在同一直角坐標(biāo)系中有拋物線y和三個(gè)點(diǎn)151922G，cS，c，H(20)c0c22點(diǎn)P，，H，PP316；．a(chǎn)；．0.18；．；．y4.75x；．2；．22551，x3．；．；．x；12AFOEB63；；；；；．36731(32······························································3分21313·······································································4分2·························································································6分a244a2·······································································2分a24aa22a·······························································4分(a2)(aaa······················································································7分a2BCEF；；BNEM，AENB·····································································4分ABCDEF∠∠∠∠∠∠．···5分，，．················································································7分BNEM∠，，BM∥NEBN∥ME，．BNEMBCDE，∠∠，∠BNCEND，△BCN≌△EDN．BNNE．BNEM···············································································7分BCEM∥CE，BC與MEBMBCEM·········································································7分281(3.27.07.83838.49.8)7.71；········1分1012(7.07.83838.4)8；·············································2分883；·····················································································3分88.44或．·············································································4分11····························································6分44········································································8分21∥BC△ADE∽△ABC，．）DEADAEABAC······························································································1分82xyAB8，AC6，AD82x，y又．863yx6．···························································································3分2x0≤x≤4．···································································4分11322xx6）S2233x6x(x2)6．·····································································6分2222當(dāng)x2S有最大值，且最大值為6．·······················································8分289···························································································1分DC∠ABE∠DCE∠AEB∠DEC，AB，，得△ABE≌△DCE．···················································································3分BECE△BEC，·····························································4分③②①②④123③④①③④①④①②③②456·················································································6分①②③④①②③④···········································································6分4△BEC1．································································································8分3x(10x)xx)，···························································2分6x．10x4．·······························································································3分64張．··························································4分a(102a)1000a800a500(102a)≤8000，··············································6分500(102a)≤1000.1342≤a≤3．2由aa3．················································································8分334·······························9分a(102a)500(102a)≤1000，··································································6分102a0.52≤a5a3a4或．a(chǎn)當(dāng)a當(dāng)a33100038004500740080004410004800250082008000···························································································8分334······························9分295PD5．PPyD點(diǎn)在P上．····························································2分l21DG(03)，CAPx654321123B12．310，5，5．1222222G345622F90PDllP則，．與11···························································································6分PD5CD10，，2．②PC22．(π5152Sπ(5)，S．24422△5π5．9分CDl242(e，d)(ced)，．························································2分），，，DA，，，作xABCD，1111，D作AEBB于E，DFCCF．AABCDCD11yCBA∥BBCC，11B(，d)FD(，f)．E(，b)xEBAFCD．OBACD1111又，△BEA≌△CFD．·····················································································4分AFDFacBECFdb．，設(shè)C(，y)exacxeca．yfdbC(ecfdb)．····························5分fdb由y．cea，ndfbmace，nbd