,#,/,14,中考,数,学一模试卷,一,、,单,选题,(,共,8,题;共,16,分),1.2019,年,上,半,年,北,京,市实,现地,区,生,产,总值,15212.5,亿元,,,同,比,增长,6.3%,总,体来,看,,,经,济,保,持,平,稳,运,行,高质,量,发,展,将数,据,15212.5,用,科,学,记,数,法,表,示,应,为,(,),A.,1.5212510,5,B.,1.5212510,4,2.,如,图,是,某,几,何,体,的三,视,图,,则,该,几,何,体,是(,C.,0.15212510,5,D.,0.15212510,6,),A.,长,方,体,B.,正,方,体,C.,圆,柱,D.,球,3.,如,图,,,将,一,块,含,有,30,的,直角,三,角,板,的,顶,点,放,在,直,尺的,一,边,上,,,若,1,48,,,那,么,2,的,度,数,是,(,),C.,92,B.,78,分,解,因,式,,,结,果,正确,的是,(,)B.,A.,48,把,C.,点在,数,轴,上,的,位,置,如图,所示,,为原,点,,,,则点所表,示,的,数,为(,),D.,102,D.,若,点,所表,示,的,数,为,,,A.B.,6.,已,知,锐,角,AOB,,,如,图,,(,1,),在,射线,OA,上,取,一点,C,C.,D.,,,以,点,O,为,圆,心,,,O,C,长,为,半,径作,,交,射线,OB,于点,D,,,连,接,CD,;(,2,),分,别,以,点,C,,,D,为,圆,心,,,CD,长,为,半,径,作弧,,,两,弧,交,于,点,P,,,连 接,CP,,,DP,;(,3,),作,射,线,OP,交,CD,于,点,Q,根,据以,上,作,图,过,程,及,所,作,图,形,,下,列,结,论,中,错,误,的,是,(,),A.,CP,OB,B.,CP,2,QC,C.,AOP,BOP,D.,CD,OP,1,/,14,中考数学一模试卷A.1.52125105B.1.52,7.,将,4,张长,为,a,、,宽为,b,(,a,b,),的,长,方,形,纸,片,按如,图的,方,式,拼,成,一,个,边,长,为,(,a,+,b,),的,正,方,形,,,图,中,空,白,部分,的,面,积,之,和,为,S,1,,,阴影,部,分,的,面,积,之,和,为,S,2,若,S,1,S,2,,,则,a,,,b,满,足(,),A.2,a,5,b,B.2,a,3,b,C.,a,3,b,D.,a,2,b,8.,党,的,十,八,大,以,来,,全,国,各地,认,真,贯,彻,精,准,扶,贫,方,略,,扶,贫,工,作,力,度,、,深,度,和精,准,度,都,达,到,了,新,的,水,平,为,2020,年,全,面,建,成,小,康,社,会的,战,略,目,标,打,下,了,坚,实,基础,以,下,是,根,据,近,几,年,中国,农,村,贫,困,人,口,数,量,(,单 位:,万,人,),及,分,布,情,况,绘,制的,统,计,图,表,的,一,部,分,年份,人数 地区,2017,2,01,8,2,01,9,东部,300,147,47,中部,1112,181,西部,1634,916,323,(以,上,数,据,来,源,于,国,家,统,计局),根据,统,计,图,表,提,供,的,信,息,,下,面,推,断,错,误,的,是,(,),2018,年,中,部,地,区,农,村,贫,困人,口,为,597,万人,2017,2019,年,,,农,村贫,困人,口,数,量,都,是,东,部,最少,2016,2019,年,,,农,村贫,困人,口,减,少,数,量,逐,年,增多,2017,2019,年,,,虽,然西,部农,村,贫,困,人,口,减,少,数,量,最多,,,但,是,相,对,于,东,、,中,部地,区,,,它,的,降,低,率,最低,二,、,填,空题,(,共,8,题;共,9,分),9.,若在,实,数,范,围,内,有,意义,,则,x,的,取,值,范,围,是,2,/,14,7.将 4 张长为 a、宽为 b(ab)的长方形纸片按如图,10.,随,机,从,1,,,2,,,3,,,4,中,任取,两,个,不,同,的,数,,,分,别,记为,a,和,b,,,则,a,+,b,4,的,概,率,是,11.,若,x,2,+x,3,0,,,则,代,数,式,2,(,x,2,)(,x+2,),x,(,x,1,),的,值,是,如,果,一,个,正,n,边,形,的每,个,内,角,为,108,,,那,么,这个,正,n,边,形,的,边,数,为,九,章,算,术,中,有,这,样,一个,题,:,“,今,有,醇,酒,一,斗,,直钱,五,十,;,行,酒,一,斗,,,直,钱一,十,今,将,钱,三,十,,,得,酒 二斗,问,醇,、,行,酒,各,得,几,何,?,”,其,译,文,是,:,今,有,醇酒,(优,质,酒,),1,斗,,,价值,50,钱;,行,酒,(,劣,质,酒,),1,斗,,价值,10,钱,现,有,30,钱,,买得,2,斗,酒,问,醇,酒,、,行,酒各,能,买,得,多,少,?,设,醇,酒,为,x,斗,,,行,酒,为,y,斗,,,则,可列 二元,一,次,方,程,组,为,如,图,,,半,径为的,与边长为的等,边,三,角,形的两边、都相,切,,,连,接,,则,.,15.,甲,、,乙,两,队,参,加,了,“,端午,情,,龙,舟,韵,”,赛,龙,舟,比,赛,,两队,在,比,赛,时,的路,程,s,(,米,),与,时间,t,(,秒,),之,间,的函 数图,象,如,图,所,示,,,根,据,图,象有,以,下,四,个,判,断:,乙,队,率,先,到,达,终,点;,甲,队,比,乙,队,多,走,了,126,米;,在,47.8,秒,时,,,两,队,所走,路程,相,等;,从,出,发,到,13.7,秒,的,时间,段内,,,甲,队,的,速,度,比,乙,队,的慢 所有,正,确,判,断,的,序,号,是,16.,从,1,,,0,,,2,,,3,四,个数,中任,取,两,个,不,同,的,数,(,记,作,a,k,,,b,k,),构,成,一,个数,对,M,k,a,k,,,b,k,)(,其,中,k,1,,,2,,,,,s,,,且,将,a,k,,,b,k,与,b,k,,,a,k,视,为同,一,个,数,对,),,若,满,足:,对于,任意,的,M,i,a,i,,,b,i,和,M,j,a,j,,,b,j,)(,i,j,,,1,i,s,,,1,j,s,),都有,a,i,+,b,i,a,j,+,b,j,,则,s,的,最大,值是,三,、,解,答题,(,共,12,题,;,共,102,分),17.,计,算,:,|,|,(,3,),0,+2cos60+,(,),1,3,/,14,10.随机从 1,2,3,4 中任取两个不同的数,分别记为,18,.,解,不,等,式,组:,观,察,下,列,分,式,方,程,的,求,解过,程,,,指,出,其,中,错,误,的,步骤,,,说,明,错,误,的,原,因,,,并直,接,给,出,正,确,结,果,解分,式,方,程,:,1,解:,去,分,母,,得,2,x,+2,(,x,3,),3,x,,,步,骤,1,去括,号,,得,2,x,+2,x,3,3,x,,,步,骤,2,移项,,,得,2,x,x,3,x,2,3,,,步骤,3,合并,同,类,项,,,得,2,x,1,,,步骤,4,解得,x,步骤,5,所以,,,原,分,式,方,程,的解,为,x,步,骤,6,已,知,关于,x,的,方程,ax,2,+2,x,3,0,有,两,个,不,相,等的,实数,根,求,a,的,取,值,范,围;,若,此,方,程,的,一,个,实,数,根为,1,,,求,a,的,值,及,方,程,的另,一,个,实,数,根,21.,如,图,,,在,菱形,ABCD,中,,,BE,CD,于点,E,,,DF,BC,于点,F,(,1,),求,证,:,BF,DE,;,(,2,),分,别,延,长,BE,和,AD,,,交,于点,G,,,若,A,45,,,求,的,值,22.,如,图,,,一,次,函,数,y,kx,+,b,(,k,0,),的,图,象,与,反,比例,函数,y,(,m,0,,,x,0,),的,图象,在,第,一,象,限,内,交,于点,A,,,B,,,且,该,一,次函,数的,图象,与,y,轴,正,半,轴,交,于点,C,,,过,A,,,B,分,别作,y,轴,的,垂,线,,,垂,足,分,别,为,D,,,E,已知,A,(,1,,,4,),,求,m,的,值,和,一,次,函,数的,解,析,式,;,若点,M,为,反,比,例,函,数图,象,在,A,,,B,之,间的,动点,,,作,射,线,OM,交,直,线,AB,于,点,N,,,当,MN,长,度最 大时,,,直,接,写,出,点,M,的,坐,标,23.,如,图,,,直,线,l,与,O,相,离,,,OA,l,于,点,A,,,与,O,相,交,于点,P,,,OA,5,C,是,直线,l,上,一,点,,连,接,CP,并,延,长,,,交,O,于点,B,,且,AB,AC,4,/,14,18.解不等式组:观察下列分式方程的求解过程,指出其中错误,求,证,:,AB,是,O,的,切线;,若,tan,ACB,,,求,线段,BP,的,长,24.,人,口,数,据,又,称,为,人,口,统,计数,据,,,是,指,国,家,和,地,区,的相,关,人,口,管,理,部,门,通,过,户口,登,记,、,人,口,普,查,等,方,式 统计,得,出,的,相,关,数,据,汇,总,人,口,数,据,对,国,家,和,地,区,的人,口,状,况,、,管,理,以,及,各,项方,针,政,策,的,制,定,都,具,有,重 要的,意,义,下,面,是,关,于,人,口数,据,的,部,分,信,息,a,.2018,年,中,国,大,陆,(,不含,港澳,台,),31,个,地,区,人,口,数,量(,单,位,:,千,万,人,),的,频,数分,布,直,方,图,(,数,据分,成,6,组,:,0,x,2,,,2,x,4,,,4,x,6,,,6,x,8,,,8,x,10,,,10,x,12,):,b,人,口,数量,在,2,x,4,这一,组,的,是,:,2.2,2.4 2.5,2.5 2.6 2.7,3.1 3.6,3.7 3.8,3.9,3.9,c,.2018,年,中,国,大,陆,(,不,含,港澳,台,),31,个,地,区,人,口,数,量,(,单,位,:,千,万,人,),、,出生,率,(,单,位,:,),、,死,亡,率,(,单 位,:,),的,散,点,图:,5,/,14,求证:AB 是O 的切线;b 人口数量在 2x4,d,如,表,是,我,国,三,次,人,口,普查,中,年,龄,结,构,构,成,情,况,:,0,14,岁,人,口,比例,15,59,岁,人,口,比,例,60,岁,以,上,人,口,比,例,第二,次,人,口,普查,40.4%,54.1%,5.5%,第五,次,人,口,普查,22.89%,66.78%,10.33%,第六,次,人,口,普查,16.6%,70.14%,13.26%,e,世,界,各,国,的,人,口,出生,率差,别,很,大,,,出,生,率,可,分,为五,等,,,最,高,50,,,最,低,20,,,2018,年,我,国人,口 出生,率,降,低,至,10.94,,,比,2017,年,下,降,1.43,个千,分点,根据,以,上,信,息,,,回,答,下,列,问题:,(,1,),2018,年,北,京,人,口为,2.2,千,万,人,,,我,国,大,陆,(不,含港,澳,台,),地,区,中,,,人,口,数量,从,低,到,高,排,列,,,北,京,排 在第,位,人,口,增,长,率,人,口出,生率,人,口,死,亡,率,,,我,国,大,陆,(,不,含,港,澳,台,),地,区,中人,口,在,2018,年,出,现,负,增,长 的地,区,有,个,,在,这些,地,区,中,,,人,口,数,量,最,少的,地,区,人,数,为,千万,人,(,保,留,小,数,点,后一,位),下,列,说,法,中,合,理,的,是,我,国,人,口,基,数,较,大,,即,使是,人,口,出,生,率,和,增,