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,#,/,16,中考,数,学一模试卷,一,、,单,选题,(,共,8,题;共,16,分),1.2020,年,5,月,1,日,起,,,北京,市全,面,推,行,生,活,垃,圾,分类,.,下面,图,标,分,别,为,厨,余,垃,圾,、可,回,收,物,、,有,害,垃,圾,、,其 他垃,圾,,,其,中,不,是,轴,对,称,图形,的,是(,),A.,B.,C.,D.,为,解,决,延,期,开,学,期间,全,市初,高,三,学,生,的,学,习,需,求,,提,升,学,生,的,实,际,获,得,,,北京,市,教,委,打,造,了,“,答,疑,平 台,”,,,全市,1,4,40,00,名,初高,三学,生,全,部,纳,入,在,线,答,疑,辅导,范,围,将,1,44,0,0,0,用,科,学记,数,法,表,示,应,为(,),A.,14410,3,B.,14.410,4,C.,1.4410,5,D.,1.4410,6,方,程组的,解,为(),B.C.,D.,在,数,轴,上,,点,A,,,B,分别,表示,实,数,a,,,b,,,将,点,A,向,左平移,1,个,单,位,长,度,得,到,点,C,,,若,点,C,,,B,关,于,原,点,O,对称,,,则,下,列,结,论,正,确,的,是(),A.,a+b,1,B.,a+b,1,C.,a,b,1,D.,a,b,1 5.,若,一,个,凸,多,边,形,的内,角,和为,720,,,则,这,个,多,边形,的边,数,为,A.4B.5C.,6D.,7,6.,若,a+b,1,,,则,代,数,式,(,1,),的,值,为(),A.,2,B.,1,C.,1D.,2,7.,如,图,,,矩,形,ABCD,中,,,BC,2AB,,,点,E,在,边,AD,上,,,EF,BD,于点,F,若,EF,1,,,则,DE,的,长,为,(),A.B.C.2D.,3,8.,为,了,解,高,校,学生对,5G,移,动通,信,网,络,的,消,费,意,愿,,,从在,校,大,学,生,中,随,机,抽,取,了,1000,人,进,行,调,查,,,下,面,是 大学,生,用,户,分,类,情,况,统,计,表和,大,学,生,愿,意,为,5G,套餐,多支,付,的,费,用,情,况,统,计,图,(例,如,,,早,期,体,验,用,户,中,愿 意为,5G,套,餐,多,支付,10,元,的人,数,占,所,有,早,期,体,验,用,户的,50%,),用户,分,类,人数,A,:,早,期,体,验,用,户,(,目,前已,升,级,为,5G,用,户,),260,人,1,/,16,中考数学一模试卷A.B.C.D.为解决延期开学期间全市初高三,B,:,中,期,跟,随,用,户,(,一,年内,将升,级,为,5G,用,户),540,人,C,:,后,期,用,户,(,一,年,后,才升,级为,5G,用,户),200,人,下列,推,断,中,,,不,合,理,的,是,(,),早,期,体,验,用,户,中,,,愿,意,为,5G,套,餐,多,支,付,10,元,,,20,元,,,30,元,的,人,数,依,次递,减,后,期,用,户中,,,愿,意,为,5G,套餐,多支,付,20,元的,人,数,最,多,愿,意,为,5G,套,餐,多,支付,10,元,的,用,户,中,,,中,期,跟随,用户,人,数,最,多,愿,意,为,5G,套,餐,多,支,付,20,元,的,用,户,中,,,后,期,用户,人数,最,多,二,、,填,空题,(,共,8,题;共,9,分),要,使,分,式有意,义,,则的取,值,范,围,是,.,下,列,几,何,体,中,,,主,视,图,是三,角,形,的,是,11.,如,图,,,已,知,ABCD,,,通,过测,量,,,计,算,得,ABCD,的,面积,约,为,cm,2,(结,果,保,留,一,位,小,数,),12,.,如,图,,,正,方,形,网,格,中,,,点,A,,,B,,,C,,,D,均,在,格,点,上,,则,A,CD,+,B,D,C,13.,用,四,个,不,等,式,a,b,,,ab,b,2,,,a,0,,,b,0,中,的,两,个,不,等,式,作,为题,设,,,余,下,的,两,个,不等 式中,选,择,一,个,作,为,结,论,,,组成,一,个,真,命,题,:,2,/,16,B:中期跟随用户(一年内将升级为 5G 用户)540 人C:,14.,如,图,,,在,平,面,直,角,坐,标,系,xOy,中,,,点,A,,,C,分,别,在,x,轴,,,y,轴,的,正,半,轴,上,,,以,OA,,,OC,为,边,作,矩,形,OABC,,,双,曲,线,y,(,x,0,),与,BC,边,交于,点,E,,,且,CE,:,EB,1,:,2,,,则,矩形,OABC,的,面积,为,15.,某,大,学,为,了,解,学,生,在,A,,,B,两家,餐,厅,用,餐,的,满,意,度,,从,在,A,,,B,两,家,餐,厅都,用过,餐,的,学,生,中,随,机,抽,取,了,100,人,,,每,人,分,别,对,这两,家餐,厅,进,行,了,评,分,,,统,计,如下:,人数,满意,度,评分,餐厅,非常,满,意,较满意,一般,不太,满,意,非常,不,满意,合计,A,28,40,10,10,12,100,B,25,20,45,6,4,100,若小,芸要,在,A,,,B,两,家,餐厅,中选,择,一,家,用,餐,,,根,据,表,格中,数,据,,,你,建,议,她,去,餐,厅,(,填,A,或,B,),,理由,是,16.,已,知,O,如,图,,,作,O,的,直,径,AB,;,以,点,A,为,圆,心,,,AO,长为,半径,画,弧,,,交,O,于,C,,,D,两点;,连,接,CD,交,AB,于,点,E,,,连接,AC,,,BC,根据,以,上,作,图,过,程,及,所,作,图形,,,有,下,面,三,个,推,断:,CE,DE,;,BE,3AE,;,BC,2CE,所有,正,确,推,断,的,序,号,是,三,、,解,答题,(,共,12,题,;,共,90,分),17.,计,算,:,4sin30+|,|,(,),1,18,.,解,不,等,式,组:,关,于,x,的,方程,x,2,+4x+m+2,0,有,两,个,不,相,等,的,实,数,根,,,且,m,为,正,整,数,,,求,m,的值,及,此,时,方,程,的,根,如,图,,,ABCD,中,,,点,E,,,F,分,别在,边,BC,,,AD,上,,,BE,DF,,,AEC,90,3,/,16,14.如图,在平面直角坐标系xOy 中,点A,C 分别在x,求,证,:,四,边,形,AECF,是矩,形,;,连,接,BF,,,若,AB,4,,,ABC,60,,,BF,平,分,ABC,,,求,AD,的,长,21.,抗,击,新,冠,肺,炎,期,间,,,某,小区,为,方,便,管,理,,,为,居,民,设计,了,一,个,身,份,识,别,图,案,系统,:,在,44,的,正,方,形,网,格,中,,白,色,正,方,形,表,示数,字,1,,,黑,色,正,方,形,表,示,数,字,0,,,将,第,i,行,第,j,列,表,示,的,数,记,为,a,i,,,j,(,其,中,i,,,j,都是,不,大,于,4,的,正,整,数,),,例,如,,图,1,中,,,a,1,,,2,0,对,第,i,行,使,用,公,式,A,i,a,i,,,1,2,3,+a,i,,,2,2,2,+a,i,,,3,2,1,+a,i,,,4,2,0,进,行,计,算,,,所,得,结,果,A,1,,,A,2,,,A,3,,,A,4,分别,表,示,居,民,楼,号,,,单,元,号,,楼,层,和,房,间,号,例,如,,图,1,中,,,A,3,a,3,,,1,2,3,+a,3,,,2,2,2,+a,3,,,3,2,1,+a,3,,,4,2,0,18+04+02+11,9,,,A,4,08+04+12+11,3,,,说,明,该,居,民,住,在,9,层,,,3,号,房,间,,即,903,号,(,1,),图,1,中,,,a,1,,,3,;,图,1,代,表,的居,民,居,住,在,号,楼,单元;,请,仿,照,图,1,,,在,图,2,中,画,出,8,号楼,4,单元,602,号居,民,的,身,份,识,别,图,案,22.,如,图,,,AB,为,O,的,直径,,,AC,为,弦,,,点,D,为中,点,,过,点,D,作,DE,直,线,AC,,,垂,足,为,E,,,交,AB,的,延长 线,于,点,F,求,证,:,EF,是,O,的,切,线;,若,EF,4,,,sin,F,,求,O,的,半,径,为,了,解,学,生,居,家,学,习,期,间对,函,数,知,识,的,掌,握,情,况,,某,学,校,数,学,教,师,对,九,年,级全,体,学,生,进,行,了,一,次,摸,底 测试,,,测,试,含,一,次,函,数,、,二次,函,数,和,反,比,例,函,数,三,项内,容,,,每,项,满,分,10,分,现随,机,抽取,20,名,学,生,的,成,绩,(成,绩,均,为,整,数,),进,行,收,集、,整,理,、,描,述,和,分,析,,,下面,给,出,了,部,分,信,息,:,该,20,名,学,生,一,次,函,数,测试,成,绩,如,下:,7,9,10,9,7,6,8,10,10,8,6,10,109,10,9,9,9,10,10,该,20,名,学,生,总,成,绩,和,二次,函,数,测,试,成,绩,情,况,统,计图:,4,/,16,求证:四边形AECF 是矩形;(1)图 1 中,a1,c,该,20,名,学生,总,成,绩平,均,分,为,25,分,,,一次,函,数,测,试平,均分,为,8.8,分,根据,以,上,信,息,,,回,答,下,列,问题:,该,20,名,学,生,一,次函,数测,试,成,绩,的,中,位,数,是,,,众,数,是,若,该,校,九,年,级,共,有,400,名,学,生,,,且,总,成,绩,不低,于,26,分,的,学,生,成绩,记,为,优,秀,,估,计,该,校,九,年,级,本,次,测试总,成,绩,优,秀,的,约,有,人,在,总,成,绩,和,二,次,函数,测试,成,绩,情,况,统,计,图,中,,,A,同,学,的,一,次,函,数,测,试,成,绩是,分,;,若,B,同,学的 反比,例,函,数,测,试,成,绩,是,8,分,,,则,B,同,学,的,一,次,函数,测试,成,绩,是,分,一,次,函,数,、,二,次,函,数,和反,比,例,函,数,三,项,内,容,中,,学,生,掌,握,情,况,最,不,好,的,是,24.,如,图,,,半,圆,O,的直,径,AB,6cm,,,点,M,在,线,段,AB,上,,,且,BM,1cm,,,点,P,是上,的,动,点,,,过,点,A,作,AN,直,线,PM,,,垂,足,为,点,N,(,1,),小,东,根,据,学,习,函,数的,经验,,,对,线,段,AN,,,MN,,,PM,的,长,度,之,间,的,关,系,进,行,了探,究,下,面,是,小,东,的,探,究 过程,,,请,补,充,完,整:,对,于,点,P,在上的不,同位,置,,画,图,、,测,量,,,得,到,了,线段,AN,,,MN,,,PM,的,长,度,的几,组,值,,,如,表,:,位置,1,位置,2,位置,3,位置,4,位置,5,位置,6,位置,7,AN/cm,0.00,3.53,4.58,5.00,4.58,4.00,0.00,MN/,c,m,5.00,3.53,2.00,0.00,2.00,3.00,5.00,5,/,16,c该 20 名学生总成绩平均分为 25 分,一次函数测试平,PM/cm,1.00,1.23,1.57,2.24,3.18,3.74,5.00,在,A,N,,,M,N,,,PM,的,长,度,这,三个,量,中,,,确,定,的长,度,是,自,变,量,,,和,的,长,度,都,是这 个自,变,量,的,函,数,;,(,2,),在,同,一,平,面,直,角,坐,标,系,xOy,中,,,画,出,(,1,),中所,确定,的,函,数,的,图,象;,(,3,),结,合,函,数,图,象,,,解,决,问题,:,当,AN,MN,时,,,PM,的,长,度,约,为,
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