福建省福州市2022-2023学年九年级上学期期末数学试题

（在此卷上答题无效）2022-2023学年第一学期福州市九年级数学适应性练习本练习卷分第Ⅰ卷（选择题）和第Ⅱ卷（非选择题）两部分，完卷时间120分钟，1．答题前，学生务必在本练习卷及答题卡规定位置填写本人准考证号、姓名等信墨水签字笔在答题卡上相应位置书写作答，海，深圳，福州四个城市的地铁标志，其中是中心对称图形ABCDABCD九年级数学－1－（共5页）yyBCFEBCF12AA．x1=-1，x2=-2B．x1=-1，x2=2C．x1=1，x2=-2D．x1=1，x2=27．将抛物线y=(x-2)2+3向左平移1个培养过程．某中学加大校园农场建设，为学生提供更多的劳动场所．该农场某种作物2020年的年产量为100千克，2022年的年产量为225千克．设该作物年产平均增长率为x，则符合题意的方程是A．100(1+2x)=2252=225A．x=-2B．x=2九年级数学－2共5页）13．某林业部门要考察某种幼树在一定条件下的移植成活率，在同样条件下，对这种幼树进行大量移植，并完成统计情况，13356335126282.75O2.75O0.51.117本小题满分8分）解方程：x23x2=0.18本小题满分8分）AEDBFC九年级数学－3共5页）DCDCABC类别45%19本小题满分8分）如图，将△ABC绕点A顺时针旋转α得到△ADE(α为锐角点D与点B对应，21本小题满分8分）ABBE人数181412B1412B（1）参与此次抽样调查的学生人数是，扇形统计图中A部分圆心角的度数是；22本小题满分10分）M九年级数学－4共5页）AFxAFx23本小题满分10分）4x4xBEB24本小题满分13分）（1）如图1，若△ABC是等边三角形，AAEEHHEFF25本小题满分13分）在，请说明理由.九年级数学－5共5页）2022－2023学年第一学期福州市九年级数学适应性练习答案及评分标准查内容比照评分参考制定相应的评分细则.如果后继部分的解答有较严重的错误，就不再给分.3．解答右端所注分数，表示学生正确做到这24ac24x1x(2)=17>0，·····················································································································································2··································································································2a·········································································································,22 .·················································2∴AD∥BC，····························∴四边形AECF是平行四边形，·················································································6分.······································解得a<1，··································································PM20本小题满分8分）PMA∴AB=AD，AC=AE，BAD=CAE，···················BBACAEE21本小题满分8分）解1）40；··················································································································2分54°.··············································································12341234并且它们发生的可能性相等，···························································22本小题满分10分）QOO····································································································································∴OM=PM=x，OP=2PM=∴OM=r，··················································································∴点M在⊙O上.········将得AEFHKAOFx23本小题满分将得AEFHKAOFxyBE····································································································································〈〈yyCCMNMNEB································QAEB································QAFx矩形MNPQ.····················································24本小题满分13分）∴BH=AH，··········································································DH=BH，····························································································3分∴AH=2DH.························②解：过点H作HK∥BC交AG于点K，∴HK=AH，····················································DGADHKAH=2DH，F是CH的中点，········································································································································································································DG38585DGADAEHKHFBDHDADCD AD6AD=2，··································△ABC2