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时间:2018-04-08
《九年级上学期期中考试数学备考(北师版)备考练习》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、九年级上学期期中考试数学备考(北师版)备考练习一、单选题(共4道,每道10分)1.如图,△ABC和△CDE均为等腰直角三角形,点B,C,D在一条直线上,点M是AE的中点,下列结论:①tan∠AEC=;②S△ABC+S△CDE≥S△ACE;③BM⊥DM;④BM=DM.正确结论的个数是( ) A.1个 B.2个 C.3个 D.4个 2.反比例函数y=在第一象限的图象如图所示,则k的值可能是( ) A.1 B.2 C.3 D.4 3.已知关于x的方程x2+bx+a=0的一个根是﹣a(a≠0),则a﹣b值为( )A.
2、﹣1 B.0 C.1 D.2 第3页共3页4.如图,△ABC和△ADE都是等腰直角三角形,∠BAC=∠DAE=90°,四边形ACDE是平行四边形,连接CE交AD于点F,连接BD交CE于点G,连接BE.下列结论中:①CE=BD;②△ADC是等腰直角三角形;③∠ADB=∠AEB;④CD•AE=EF•CG;一定正确的结论有( ) A.1个 B.2个 C.3个 D.4个 内部资料,请勿外传!9JWKffwvG#tYM*Jg&6a*CZ7H$dq8KqqfHVZFedswSyXTy#&QA9wkxFyeQ^!djs#
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