,#,/,18,数学,试,卷,第,1,页,(,共,8,页),数,学,试卷,第,2,页,(共,8,页),绝密启用,前,2020,年贵州省,遵,义市初,中,学业,水,平考试,数学,(,全,卷总,分,150,分,,,考,试,时间,120,分,钟,),注意,事,项:,1,.,答,题,前,,,务,必,将,自,己,的,姓名,、,座,位,号,和,准,考,证,号,填写,在,答,题,卡,和,试,题,卷,规,定,的,位 置上,.,答,选,择,题,时,,,必,须使,用,2B,铅,笔,将,答,题,卡,上,对,应,题,目的,答,案,标,号,涂,黑,.,如,需改,动,用橡,皮,擦,擦,干,净,后,,,再,选,涂其,他,答,案,标,号,.,答,非,选,择,题,时,,,必,须,使,用,黑,色,墨,水,笔,或,黑,色,签,字,笔,将,答,案,书,写,在,答,题,卡,规,定,的,位 置上,.,所,有,题,目,必,须,在,答,题,卡,上作,答,,,在,试,题,卷,上,答,题,无,效.,考,试,结,束,后,,,将,试,题,卷,和答,题,卡,一,并,交,回,.,一,、,选择,题,(,本题共,12,小题,,,每小题,4,分,,,共,48,分,.,在每小题给出的四个选 项中,,,只有一项是符合题目要求的,,,请用,2B,铅笔把答题卡上对应题目答 案标号涂黑、涂满,),1,.,3,的,绝,对,值,是,A,.,3B,.,3,(,),D,.,3,C,.,1,3,2,.,在,文,化,旅,游,大,融,合,的,背,景,下,,,享,受,文,化,成,为,旅游,业的,新,趋,势,.,今,年,“,五,一,”,假,期,,,我,市 为游,客,和,市,民,提,供,了,丰,富,多彩,的,文,化,享,受,,各,艺术,表演,馆,美,术,馆,、,公共,图书,馆,、群,众,文化,机,构,、,非,遗,机,构,及,文,物机,构,累,计,接,待,游客,18.25,万人,次,,将,18.25,万用,科,学,计,数,法表,示,为,A,.,1.825,10,5,B,.,1.825,10,6,C,.,1.825,10,7,(,),D,.,1.825,10,8,3,.,一,副,直,角,三,角,板,如,图,放,置,,使,两,三,角,板,的,斜,边,互,相平,行,每,块,三,角,板,的,直,角顶,点都,在 另一,三,角,板,的,斜,边,上,,,则,1,的度,数,为(,),A,.,30,下,列,计,算,正,确,的是,A,.,x,2,x,x,3,C,.,8,x,4,2,x,2,4,x,2,B,.,45,C,.,55,D,.,60,(,),B,.,3,x,2,6,x,2,D,.,x,2,y,x,2,y,x,2,2,y,2,5,.,某,校,7,名,学,生,在,某,次,测,量体,温,(,单,位,:,),时,得,到,如,下数,据,:,36.3,,,36.4,,,36.5,,,36.7,,,36.6,,,36.5,,,36.5,,,对,这组,数据,描,述,正,确,的,是,A,.,众,数,是,36.5,C,.,平,均,数,是,36.6,(,),B,.,中,位,数,是,36.7,D,.,方,差,是,0.4,6,.,已知,x,,,x,是方程,x,2,3,x,2,0,的,两,根,,,则,x,2,x,2,的,值,为,1,2,12,A,.,5,B,.,10,C,.,11,(,),D,.,13,7,.,如图,把一块长,为,40,cm,,宽,为,30,cm,的矩形硬纸板的四角剪去四个相同小正方形,,然后,把,纸,板,的,四,边,沿,虚,线,折起,,,并,用,胶,带,粘好,,,即,可,做成,一,个,无,盖,纸,盒,.,若,该无,盖,纸,盒 的底,面,积,为,600,cm,2,,,设,剪,去,小,正,方形,的,边,长,为,x,cm,,则,可,列,方,程为(,),A,.,30,2,x,40,x,600,C,.,30,x,40,2,x,600,B,.,30,x,40,x,600,D,.,30,2,x,40,2,x,600,8,.,新,龟,兔,赛,跑,的,故,事,:,龟,兔从,同,一,地,点,同,时,出,发,后,,,兔,子,很,快,把,乌,龟,远,远,甩,在后,头,.,骄傲,自满,的,兔,子,觉,得,自,己,遥,遥,领先,,,就,躺,在,路,边,呼,呼,大,睡起,来,.,当,它,一,觉,醒,来,,,发,现乌,龟,已 经超过它,于,是,奋力直,追,,最后同时到,达,终点,.,用,S,1,、,S,2,分别表示乌龟和兔,子,赛,跑,的,路程,,t,为,赛,跑,时,间,,,则,下,列图,象,中,与,故,事,情,节,相,吻,合的是(,),ABCD,9,.,如,图,,在,菱,形,ABCD,中,,AB,5,,,AC,6,,过点,D,作,DE,BA,,交,BA,的延长,线,于 点,E,,,则,线段,DE,的,长,为(,),毕业,学,校,姓名,考,生,号,在,此,卷,上,答,题,无,效,数学试卷 第 1 页(共 8 页)数学试卷 第 2 页(共,1,/,18,数学,试,卷,第,4,页,(,共,8,页),A,.,12,B,.,18,C,.,4,D,.,24,55,5,10,.,构,建,几,何,图形,解,决,代数,问题,是,“数,形,结,合,”,思,想,的重,要,性,,在,计,算,tan15,时,,如,图.,在,Rt,ACB,中,,,C,90,,,ABC,30,,延,长,CB,使,BD,AB,,连,接,AD,,得,CD,12,3,D,15,,所,以,tan15,AC,2,3,2,3,2,3,2,3,.,类比这种,方,法,,,计,算,tan,22.5,的值为,(,),A,.,2,1,B,.,2,1,C,.,2,D,.,1,2,11,.,如图,,ABO,的顶点,A,在函数,y,k,x,0,的,图象上,,ABO,90,,过,AO,边的三,x,等分点,M,、,N,分别作,x,轴,的,平,行,线交,AB,于点,P,、,Q,.,若,四,边,形,MNOP,的,面,积为,3,,,则,k,的,值,为(,),A,.,9,B,.,12,C,.,15,D,.,18,12,.,抛,物,线,y,ax,2,bx,c,的对称,轴,是直线,x,2,.,抛,物线与,x,轴,的,一个交,点,在,点,4,,,0,和,点,3,,,0,之间,,,其,部,分,图,象,如,图所,示,,,下,列,结,论,中,正,确,的个,数,有,数,学,试卷,第,3,页(,共,8,页),(,),4,a,b,0,;,c,3,a,;,关于,x,的,方,程,ax,2,bx,c,2,有两,个,不,相,等实,数,根;,b,2,2,b,4,ac,.,A,.,1,个,B,.,2,个,C,.,3,个,D,.,4,个,二,、,填空,题,(,本小题共,4,小题,,,每小题,4,分,,,共,16,分,,,答题请用黑色墨水笔 或黑色签字笔直接答在答题卡的相应位置上,),计,算,12,3,的结,果,是,.,如图,,直,线,y,kx,b,(,k,、,b,是常数,k,0,)与直线,y,2,交于点,A,4,,,2,,则关于,x,的不,等,式,kx,b,2,的解,集,为,.,15,.,如,图,,,对,折,矩,形,纸片,ABCD,使,AD,与,BC,重,合,,,得,到,折,痕,MN,,,再,把,纸片,展,平,.,E,是,AD,上一点,,将,ABE,沿,BE,折叠,,,使点,A,的对应点,A,落在,MN,上.,若,CD,5,,则,BE,的 长,是,.,16,.,如,图,,O,是,ABC,的,外,接圆,,,BAC,45,,,AD,BC,于点,D,,,延长,AD,交,O,于 点,E,,若,BD,4,,,CD,1,,,则,DE,的长,是,.,数学试卷 第 4 页(共 8 页)A.12B.18C.4,2,/,18,数,学,试卷,第,6,页,(共,8,页),三、解答,题,(,本题共有,8,小题,共,86,分,.,答,题请用黑色水笔或黑色签字笔书 写在答题卡的相应位置上,,,解答时应写出必要的文字说明,、,证明过程或演 算步骤,),17,.(,8,分,),计,算:,0,1,2,2,(,1,),sin,30,3.14,;,3,(,2,),解,方,程;,1,.,x,2,x,x,2,2,x,3,x,2,2,x,4,x,4,18,.(,8,分,)化,简,式子,x,,,从,0,,,1,,,2,中,取,一,个,合,适,的,数作为,x,的值,代入,求,值.,19,.(,10,分,),某,校,为,检测,师,生体,温,,,在,校,门,安,装,了,某,型号,测,温,门,.,如,图,为,该,测温,门截,面,示 意,图,,已知测,温,门,AD,的顶部,A,处距地,面,高为,2.2,m,,为了解自己,的,有效测温,区,间,.,身,高,1.6,m,的小,聪,做,了,如,下,实,验,:,当,他,在,地面,N,处,时,测,温门,开始,显,示,额,头,温度,,,此,时,在额头,B,处测得,A,的仰,角,为,18,;,在地面,M,处时,,,测温,门停,止显示,额,头,温,度,,此,时,在,额,头,C,处测得,A,的,仰角为,60,.,求小,聪,在地,面,的有效测,温,区间,MN,的长,度,.(额头,到地面的距离以身,高,计,计算精确,到,0.1,m,,,sin18,0.31,,,cos18,0.95,,,tan18,0.32,),20,.(,10,分,),如,图,,AB,是,O,的,直,径,,,点,C,是,O,上一,点,,,CAB,的平,分,线,AD,交,BC,于点,D,,过点,D,作,DE,BC,交,AC,的,延,长,线,于点,E,.,数学,试,卷,第,5,页,(,共,8,页),求,证,:,DE,是,O,的,切,线;,过点,D,作,DF,AB,于点,F,,连接,BD,.,若,OF,1,,,BF,2,,求,BD,的长,度,.,21,.(,12,分,),遵,义,市,各,校,都在,深,入,开,展,劳,动,教,育,,,某校,为,了,解,七,年,级,学,生,一,学期,参加,课 外劳,动,时,间,(,单,位:,h,),的,情况,,,从,该,校,七,年,级,随,机,抽查,了,部,分,学,生,进,行,问,卷,调查,并将,调,查,结,果,绘,制,成,如,下,不完,整,的,频,数,分,布,表,和,频,数分,布,直,方,图,.,课外,劳,动,时,间,频,数,分,布表,劳动,时,间,分,组,频数,频率,0,t,20,2,0.1,20,t,40,4,m,40,t,60,6,0.3,60,t,80,a,0.25,80,t,100,3,0.15,解答,下,列,问,题:,频,数,分,布,表,中,a,,,m,;,将,频,数,分,布直,方,图,补,充,完,整;,若,七,年,级,共,有,学生,400,人,,,试,估,计,该,校,七,年,级学,生一,学,期,课,外,劳,动,时,间,不,少,于,60,h,的人,数,;,(,3,),已,知,课,外,劳,动,时,间,在,60,h,t,80,h,的男,生,人,数,为,2,人,,,其,余,为女,生,,,现,从,该,组中,任选,2,人,代,表,学,校,参,加,“,全市,中,学,生,劳,动,体,验,”,演,讲比,赛,,,请,用,树,状,图,或列,表法,求,所,选学,生,为,1,男,1,女,的,概,率,.,毕业,学,校,姓名,考,生,号,在,此,卷,上,答,题,无,效,数学试卷 第 6 页(共 8 页)三、解答题(本题共有 8,3,/,18,数,学,试卷,第,7,页(,共,8,页),数学,试,卷,第,8,页,(,共,8,页),22,.(,12,分,),为,倡,导,健,康,环保,,,自,带,水,杯,已,成,为,一,种好,习,惯,,,某,超,市,销,售,甲,,乙,两种,型,号水,杯,,,进,价,和,售,价,均保,持不,变,,,其,中,甲,种,型,号水,杯进,价,为,25,元,/,个,,,乙种,型号,水,杯,进,价,为,45,元,/,个,,,下,表,是,前两,月,两,种,型,号,水,杯,的,销,售情,况,:,时间,销售,数,量,