北京市西城区2019-2020学年上学期初中七年级期末考试数学试卷

北京市西城区2019-2020学年上学期初中七年级期末考试数学试卷3年月8吨1061071080.7361092)4243(27(2223ba2b2ba5b5b9abab若a若a若ab若a23|2y1|0xy若(x211332222°°°°cbc0|a|d|bdaDCDABBCBCADDBBCACBDACBDBCADACACADx60(x100)100x100(x100)60(x100)100(x100)60x100x60x32。x2x3xa80|x2且xxx。。x22x22x4x3。230。xmmx2BODBOC在AOCDOE。OABA60BOA的BA4((9)((12)3112424311(4241322)0.254(3285题6xxy)2(xy)3xyx1y3，222x1x242325xy3xy11ABCBCD为21。题6题75(5)6?BODBOC与BAOCBOD与AOCAOD。MON40BODAOCBOD与；1②6babababa22ab26，(。237dVtVDd12在V和dBR段RP或QABAB1OAM。3D3点A，D与2EAEx；2NFAF；LH13(tH径tt0)xx1ABR）xx22121Ax；；）【试题答案】3CBADDCCDAB32211xx30180(x222x18)13231424和，和，和，和114+）((9)((12)219812292181分3分4分311242431124243194242分3分4分31442916311(424311(4243114252525423112分424254分1232)0.25440(3281232)0.25440(3281380.254481分2分184824840103分4分5题6xy)2(xy)3xyx1，y3x222xy)2(xy)3xyx2223x3xy2x2y3xy2分222x2y3分221y3，当x(234分5分2219x1x2423x2)x1分32x4242x24433x2分3分3x255x4分5分5x①②x2y53xy152yx③1分2y)y12分2y3分4分1把x1x5分y24分或5题6题7；2分6分x3分1005x0.910050.925x5分30x6分1）AOCBOD；1分2分点BAOCBOC180BODBOC与BODBOC180AOCBOD3分4分AOMOMAOCAOC2AOMMON40AONMONAOM40AODAOD2AON801BODAOC，BODAOD180，222BOD507分66分7dVD50d25V360，，t，D25360t3分4分50t180Dt11则t5分D111Dt212dV2dVt则t6分1D21D1211V和dD227分；2分4分②1x5；5）25分0)5t4t3t，，。3ttL9Rt，214Rt。2RRH12当ROt40t2。291342t当RMt。2113当2tRR41213当2tH4222BOD507分66分7dVD50d25V360，，t，D25360t3分4分50t180Dt11则t5分D111Dt212dV2dVt则t6分1D21D1211V和dD227分；2分4分②1x5；5）25分0)5