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,#,广东,省,广州,市,中考,数,学复,习,训,练,卷,一选择题(共,10,小题,满分,30,分,每小题,3,分),1,的相,反,数,是,(,),A,3B,C,3 2,下,列,立,体,图,形,中,,,俯视,图是,正,方,形,的,是,(,),D,A,B,C,D,3,2020,年,是,“,双,11,”,的,第,12,个,年,头,,,受,前,期,疫情,影响,消,费,习,惯,发,生,大,幅,改,变以,及,直,播,电,商的,快,速,发,展,,,今,年,双,11,人们,消,费,热,情,空,前,高,涨,阿里,巴,巴,数,据,显,示,,,在,11,日,0,分,26,秒,,天,猫双,11,达到,58.3,万笔,/,秒,的,订,单,创,建,新,峰,值,把,58.3,万,这,个,数,据,用,科,学记,数,法表 示 为,(,),A,583,10,3,元,B,5.83,10,6,元,C,5.83,10,5,元,D,0.583,10,6,元,4,已知,O,与,点,P,在,同一,平面,内,,,如,果,O,的,直,径,为,6,,,线,段,OP,的,长,为,4,,,则下,列,说,法,正 确的,是,(,),A,点,P,在,O,上,B,点,P,在,O,内,C,点,P,在,O,外,D,无,法判,断,点,P,与,O,的位,置,关系,5,如,图,,,数,轴,上,两,点,M,,,N,所,对,应,的,实,数,分,别为,m,,,n,,,则,m,n,的,结果,可能,是(,),A,1B,1,C,2,D,3,已,知,一,元,二,次,方,程,3,x,2,7,x,+4,0,,,则,该,方程,的根,的情,况,是,(,),A,有,两,个,不,相,等,的,实数,根,B,有,两,个,相,等,的,实,数,根,C,两,个,根,都,是,自,然,数,根,D,无,实,数根,7,如,图,,,在,ABC,中,,,以,点,B,为,圆,心,,,以,BA,长为,半径,画,弧,交,边,BC,于点,D,,,连接,AD,若,B,40,,,C,36,,,则,DAC,的,度,数,是,(,),A,70,D,24,8,已,知,a,2+,B,44,C,34,,,b,2,,,则,a,2,+,b,2,的,值,为,(,),A,12B,14,C,16,9,二,次,函数,y,ax,2,+,bx,+,c,的图,象,如,图,所,示,,,反,比,例,函数,y,D,18,与,正,比,例,函数,y,bx,在,同,一,坐标,系,内,的,大,致,图,象,是,(,),A,B,C,10,作,O,的,内,接,正,六,边,形,ABCDEF,,,甲,、,乙,两,人,的作,法,分,别,是:,D,甲:,第,一,步,:,在,O,上任,取一点,A,,,从点,A,开,始,,,以,O,的,半,径,为,半,径,,在,O,上,依,次,截,取,点,B,,,C,,,D,,,E,,,F,第二,步,:,依,次,连,接,这,六,个,点,乙:,第,一,步,:,任,作,一,直径,AD,第,二,步,:,分,别作,OA,,,OD,的,中,垂,线,与,O,相,交,,交点,从 点,A,开,始,,,依,次,为,点,B,,,C,,,E,,,F,第,三,步,:,依,次,连,接这,六,个,点,对于,甲,、,乙,两,人,的,作,法,,,可判,断,(,),A,甲,正,确,,,乙,错,误,B,甲、,乙,均,错,误,C,甲,错误,,乙,正,确,D,甲,、乙,均正,确,二填空题(共,6,小题,,,满分,18,分,每小题,3,分),11,分,解,因,式,:,xy,2,y,2,已,知,一,组,数,据,:,2,、,2,、,x,、,3,、,3,、,4,若,这,组,数,据的,众数,是,2,,,则,中,位,数,是,如,图,,,在,ABC,中,,,D,,,E,分,别,是,边,AB,,,AC,的,中点,若,ADE,的,面,积为,,,则,四,边形,DBCE,的,面,积,为,14,如,图,,,圆,锥,母,线长,BC,18,cm,,,若,底,面,圆,的半,径,OB,4,cm,,,则,侧,面,展,开,扇,形图,的,圆,心,角,为,1,5,如,图,,,在,正,方,形,网,格,中,,A,BC,的,顶,点,都,在,格,点上,,,则,t,a,n,AB,C,的,值,为,如,图,,,在,矩,形,ABCD,中,,,O,为,AC,中,点,,,EF,过,O,点,且,EF,AC,分别,交,DC,于,F,,,交,AB,于,E,,,点,G,是,AE,中,点且,AOG,30,,,则,下,列结,论正,确,的,是,DC,3,OG,;,OG,BC,;,OGE,是等,边,三,角,形;,S,AOE,三解答题(共,9,小题,,,满分,72,分),17,(,4,分,),计,算,:,|1,|,(,),1,+,(,2020,),0,2cos45,18,(,4,分,),已,知,:,如,图,,,AB,ED,,,点,F,、点,C,在,AD,上,,,AB,DE,,,AF,DC,求,证,:,BC,EF,19,(,6,分,),共,享,经,济,已经,进入,人,们,的,生,活,小,沈,收,集了,自,己,感,兴,趣,的,4,个共,享经,济,领,域,的,图标,,,共,享,出,行,、,共,享,服,务、,共,享,物,品,、,共,享,知,识,,制,成,编,号,为,A,、,B,、,C,、,D,的,四,张,卡 片(,除,字,母,和,内,容,外,,,其,余完,全,相,同,),现,将,这,四张,卡片,背,面,朝,上,,,洗,匀,放,好,小,沈,从,中,随,机,抽,取一,张卡,片,是,“,共,享,服,务,”,的,概率,是,多,少,?,小沈从中随机抽取一张卡片(,不,放回,),,再从余下的卡片,中,随机抽取一张,请,你,用 列表,或,画,树,状,图,的,方,法,求,抽到,的,两,张,卡,片,恰,好,是,“,共享,出,行,”,和,“,共,享,知识,”,的概,率,(,这,四张,卡,片,分,别,用,它,们,的,编,号,A,、,B,、,C,、,D,表,示),20,(,6,分,),小,华,到,超,市,购,买大,米,,,第,一,次,按,原,价,购,买,,,用,了,60,元,,,几,天,后,,,遇上,这,种,大,米,8,折,出,售,,,他用,96,元,又买,了一,些,,,两,次,一,共,购买,了,30,kg,,,这,种,大,米,的,原,价,是,多少?,21,(,8,分,),如,图,,,在,ABC,中,,,B,30,,,C,50,尺,规,作,图,:,作,边,AB,的,垂,直,平,分,线交,BC,于,点,D,;,连,接,AD,,,作,CAD,的,平分,线,交,BC,于,点,E,;(,要,求:,保,留,作,图,痕,迹,,,不,写,作法),在,(,1,),所,作,的,图,中,,求,DAE,的,度,数,22,(,10,分,),如,图,,,AB,是,O,的,直,径,,,AC,切,O,于,点,A,,,连接,BC,交,O,于,点,D,,,点,E,是,的中,点,,,连,接,AE,交,BC,于,点,F,求,证,:,AC,CF,;,若,AB,4,,,AC,3,,,求,BAE,的,正,切,值,2,23,(,10,分,),如,图,:已,知,四,边,形,ABCD,是,平,行,四,边,形,,,A,、,B,两,点,的,坐,标,分,别,为,(,1,,,0,),,(,0,,,2,),,反,比,例,函数,y,(,x,0,),,连,接,AC,、,BD,相,交,于,点,M,,,BC,的,中,点为,N,,,若,M,、,N,两,点,在,反,比,例,函,数,的图,象,上,且,BC,AB,,,求,k,的值,将,线,段,AB,平,移,,,A,的对,应点,为,P,,,B,的,对,应,点,为,Q,,,若,线段,PQ,在,反,比,例函,数,的 图,象上,,,求,P,、,Q,的,坐,标,若,将,(,1,),中,的,平,移,改为,绕,平,面,内,的,某点,R,旋,转,180,度,,,其,余,条,件,不变,,求,R,的坐,标,24,(,12,分,),如,图,,,在,Rt,ABC,中,,,C,90,,,AC,20,,,AB,25,动,点,P,从点,A,出,发,,沿,AB,以,每秒,5,个,单,位长,度的,速,度,向终,点,B,运动,当点,P,不,与点,A,重,合,时,,,过点,P,作,PD,AC,于,点,D,、,PE,AC,,,过点,D,作,DE,AB,,,DE,与,PE,交,于点,E,设,点,P,的,运动,时,间为,t,秒,线段,AD,的,长,为,(,用含,t,的,代,数,式,表,示,),当点,E,落在,BC,边,上,时,,,求,t,的,值,设,DPE,与,ABC,重叠,部,分,图,形,的,面,积,为,S,,,求,S,与,t,之,间,的,函,数关,系式,若,线,段,PE,的,中,点,为,Q,,,当点,Q,落,在,ABC,一,边垂,直,平,分,线,上,时,,,直,接,写出,t,的,值,25,(,12,分,)如,图,1,,,已知,抛,物,线,y,(,x,+,3,),(,x,4,)与,x,轴,交于,A,、,B,两,点,,与,y,轴交,于,点,C,写出,A,、,B,、,C,三,点,的坐,标,若点,P,为,OBC,内,一点,,,求,OP,+,BP,+,CP,的,最,小值,如,图,2,,,点,Q,为,对,称,轴左,侧,抛,物,线,上,一,动点,,,点,D,(,4,,,0,),,直线,DQ,分,别与,y,轴、直线,AC,交,于,E,、,F,两,点,,当,CEF,为,等,腰,三,角,形,时,,请,直,接,写,出,CE,的,长,参考,答,案,一选择题(共,10,小题,满分,30,分,每小题,3,分),1,解,:,依,据,只,有,符,号,不同,的两,个,数,互,为,相,反,数,得:,的相,反,数是,故选,:,D,2,解,:,A,、,圆,柱,的,俯,视图,是圆,,,故,此,选,项,错,误,;,B,、,正,方,体,的,俯视,图,是,正方,形,,故,此,选,项,正,确;,C,、,三,棱,锥,的,俯,视,图,是,三,角,形,,故,此,选,项,错,误;,D,、,圆,锥,的,俯,视,图,是,圆,,故此,选,项,错,误;,故选,:,B,3,解,:,58.3,万,583000,5.83,10,5,故选,:,C,解,:,O,的,半,径是,3,,,线,段,OP,的,长,为,4,,,即点,P,到,圆,心,的,距,离,大于,圆的,半,径,,点,P,在,O,外 故选,:,C,解,:,M,,,N,所,对,应的,实数,分别,为,m,,,n,,,2,n,1,0,m,1,,,m,n,的,结,果,可,能是,2,故选,:,C,6,解,:,a,3,,,b,7,,,c,4,,,b,2,4,ac,(,7,),2,4,3,4,1,0,,,方,程,有,两,个,不,相,等,的,实,数根 故选,:,A,7,解,:,AB,BD,,,B,40,,,ADB,70,,,C,36,,,DAC,ADB,C,34,故选,:,C,8,解,:,a,2+,,,b,2,,,a,+,b,4,,,ab,4,3,1,,,a,2,+,b,2,(,a,+,b,),2,2,ab,4,2,2,1,14,故选,:,B,解,:,二,次,函数,y,ax,2,+,bx,+,c,的,图,象,开,口,方,向向,下,,a,0,,,对称,轴,在,y,轴,的,左,边,,,x,0,,,b,0,,,反,比,例,函,数,y,的,图象,在第,一,三,象,限,正比,例函,数,y,bx,的,图,象,在第,二,四,象,限,,故选,:,D,解,:,甲,:,由,作,图,可,知,,,AB,BO,AO,,,即,AOB,为,等,边,三,角,形,,同理,可,得,BOC,,,COD,,,DOE,,,EOF,,,AOF,均,为,等,边,三,角,形,,,故,AB,BC,CD,DE,EF,FA,,,ABC,BCD,CDE,DEF,AFE,FAB,120,,,所以,六边,形,ABCDEF,为,正,六边,形,;,乙:,由,作,图,可,得,,,BA,BO,AO,,,即,ABO,为,等,边,三,角形,同理,可,得,AOF,,,COD,,,DO
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