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1、,#,七年级上,学,期期末数学试,题,D,7,元,一,、,选,择,题,1,如,果,规定,收,入为,正,,那,么,支出,为,负,,收,入,2,元,记,作,+,2,,,支,出,5,元,记,作,(,),.,A,5,元,B,5,元,C,3,元,下,列,说法,正,确的,是,(),A,不,是,单项,式,B,单,项式,2,的,系,数是,2,77,C,4,是,单,项,式,D,多,项式,2,2,2,3,1,的,常,数项,是,1,3,下,列,等式,变,形正,确,的是,(),A,如,果,1,=,1,,,那,么,=,B,如,果,=,,,那,么,=,C,如,果,1,=,1,,,那,么,=,3,1,3,4,如,图,,下,
2、列,语句,描,述正,确,的是,(,D,如,果,1,=,4,,,那,么,=,1,28,),A,点,O,在,直,线,AB,上,B,点,B,是,直,线,AB,的,一,个端,点,C,点,O,在,射,线,AB,上,D,射,线,AO,和,射,线,OA,是,同,一条,射,线,为,了,解某,地,10000,名,考,生的,数,学成,绩,,从,中,抽,取,1000,名,考,生的,数,学成,绩,进行,统,计分,析,下,列,说法,正,确,的,是,(),A,这,1000,名,考,生是,总,体的,一,个样,本,B,10000,名,考,生是,个,体,C,每,名考,生,的数,学,成绩,是,个,体,D,样,本容,量,是,100
3、0,个,6,下,列,运算,中,,正,确,的是,(,),A,3,+,2,=,5,C,4,2,+,3,2,=,2,B,2,2,+,3,2,=,5,2,D,5,2,4,2,=,1,7,2021,年,5,月,15,日,,,天,问,一号,探,测器,成,功着,陆,火星,,,迈,出,了我,国,星际,探,测征,程,的重,要,一,步,已,知,火星,与,地,球,的近,距,离约,为,5500,万,公,里,,,5500,万,用,科学,记,数法,表,示为,(),A,0.5510,8,B,5.510,7,C,5510,6,D,5.510,3,8,已,知,7,是,关,于,x,的,方,程,2,7,=,的,解,,,则,a,的,
4、值,为,(),A,3,B,3C,1,3,D,1,3,若,单,项式,2x,6,y,与,5x,2m,y,n,是,同,类项,,,则,(),A,m,2,,,n,1B,m,3,,,n,1C,m,3,,,n,0D,m,1,,,n,3,点,C,是,线,段,AB,的,中,点,,,点,D,是,线,段,AC,的,三,等分点,若,线,段,=,12,,,则,线,段,BD,的,长,为,(,A,10cmB,8cmC,8cm,或,10cm,D,2cm,或,4cm,某,月,1,日,10,日,,,甲,、,乙,两,人的,手,机,“,微,信,运,动,”,的,步,数统,计,图如,图,所,示,,,则,下,列错,误,的结,论,是,(,)
5、,),A,1,日,10,日,,,甲的,步,数逐,天,增,加,B,1,日,6,日,,,乙的,步,数逐,天,减,少,C,第,9,日,,,甲、,乙,两人,的,步数,正,好相,等,D,第,11,日,,,甲的,步,数不,一,定比,乙,的步,数,多,12,下,列,结论,:,若,,,那,么,2,2,;,若,|,|,,,那么,;,若,|,,,那么,2,2,;,若,2,2,,,那,么,;,|,+,|,=,|,+,|,,,则,0,,,其,中正,确,的有,(),A,1,个,B,2,个,C,3,个,D,4,个,二,、,填,空,题,13,有,理,数大,小,比较:,3,4,(,用,“,”“,”“,=,”,),23,14,
6、“,植,树,时只,要,栽下,两,棵树,,,就,可,以把,同,一行,树,栽在,同,一条,直,线,上,”,,,可,以,用来,解,释这,一,生活,现,象的,基,本,事,实,是:,15,如,图,,,=,118,,,是,直,角,,,平,分,,,则,的,度,数为,下,面,三项,调,查,:,检,测,北京,市,空气,质,量,;,防,疫,期间,检,测某,校,学生,体,温,;,调,查,某款,手,机抗,摔,能,力,,,其,中,适宜,抽,样调,查,的是,(,填,写序,号,即可,),元,朝,数学,家,朱世,杰,著的,算法,启,蒙,中,,有,一,道数,学,应用,题,“,良,马,日行,二,百四,十,里,,驽,马日,行,一,
7、百,五,十,里,,,驽,马,先行,一,十二,日,,,问,良,马几,何,追及之,”,译文,:,“,跑,得,快的,马,每天,走,240,里,,,跑,得,慢的,马,每天,走,150,里,,,慢马,先,走,12,天,,,问快,马,几天,可,以追,上,慢马,?,”,设,快,马,x,天,可,以追,上,慢马,,,根据,题,意,,列,方,程,为,248,1,6,18,观,察,下列,各,项,:,11,,,21,,,31,,,41,,,,,则,第,项是,三,、,解,答,题,计,算,:,(,1,),6,(5)+(2)(,3),(,2,),1,2,+3 (,1),3,+,|3,6|,解,下,列方,程,:,(,1,),
8、1=3,2,(,2,),4+2,57,=,1,5,10,21,先,化,简,,再,求值,:,3(,2,+,4,2,2),2(2,2,3,+,4,2,),,,其,中,=,1,,,=2,2,2,如,图,,已,知,平面,上,两点,,,,,按,照下,列,语句,画,出图,形,(只,要,求作,出,图形,,,不要,求,写做,法,),:,画,射线,;,若,线段,的,长,度,为,,,用,尺规,作,一条,线,段,,,使,它等,于,2,23,某,超,市为,了,解顾,客,对白,面,馒,头,、,大,肉,包,、,水,饺,、,米,粉,、,葱,油,饼,(,以,下,分别,用,A,,,B.C,,,D,,,E,表,示,),这,五,种
9、,早点,的,喜爱,情,况,,对,顾客,进,行了,调,查,,并,将调,查,结果,绘,制成,如,下两,幅,不完,整,统计图,.,根,据,以上,统,计图,解,答问,题,:,本,次被,调,查的,顾,客共,有,人,次,;补,全,条形,统,计图,;,扇,形统,计,图中,白,面馒,头,对应,的,圆心,角,是,度,;,若,某天,有,1200,人,次,购买,了,这五,种,早点,,,估计,其,中喜,爱,大肉,包,的有,多,少人,次,?,24,如,图,,已知,=,120,,,与,互,余,,,平分,(,1,),在,图中,,,若,=,35,,,则,=,,,=,(,2,),在,图中,,,设,=,,,=,,,请,探究,与,
10、之,间,的数,量,关系,(,写出,过,程,);,25,阅,读,下列,材,料,,我,们知,道,,,5,+,3,4,=,(5,+3,4),=,4,,,类,似的,,,我们,把,(,+,),看,成,一,个,整,体,,,则,5(,+,),+,3(,+,),4(,+,),=,(5,+3,4)(,+,),=,4(,+,),,,“,整,体,思,想,”,是,中,学教,学,解题,中,的,一,种,重要,的,思想,方,法,,它,在多,项,式的,化,简与,求,值中,应,用极,为,广泛,,,尝试,应,用,:,(,1,),把,(,),2,看,成,一个,整,体,,合,并,2(,),2,+,6(,),2,3(,),2,的,结,
11、果,;,(,2,),已,知,+,=,15,,,3,2,=,11,,求,2,+,6,(4,2),的,值,;,(,3,),拓,展探,索,:已,知,3,=,4,,,3,=,3,,,=,11,,,求,(,),+,(3,),(3,),的,值,26,某,班,将买,一,些乒,乓,球和,乒,乓球,拍,,,现,了,解情,况,如,下,:,甲,、,乙,两,家商,店,出售,同,样品,牌,的乒,乓,球和,乒,乓,球,拍,乒,乓,球拍,每,副定,价,50,元,,,乒,乓,球每,盒,定,价,10,元,,,经,洽,谈,后,,,甲,店,每买,一,副球,拍,赠一,盒,乒乓球,,,乙,店,全,部,按定,价,的,9,折,优,惠,该,
12、班需,球,拍,5,副,,,乒乓,球,x,盒,(,不小,于,5,盒,),问,:,用,代数,式,表示,两,店购,买,所需,的,费用,当,需,要,40,盒,乒,乓球,时,,通,过,计算,,,说明,此,时去,哪,家购,买,较为,合,算,当,购买,乒,乓球,数,为多,少,盒时,,,甲乙,两,家商,店,所需,费,用一,样,答,案,【,答,案,】,B,【,答,案,】,D,【,答,案,】,A,【,答,案,】,A,【,答,案,】,C,【,答,案,】,B,【,答,案,】,B,【,答,案,】,B,【,答,案,】,B,【,答,案,】,C,【,答,案,】,B,【,答,案,】,A,【,答,案,】,585,,,故,当,需,要,40,盒,乒,乓球,时,,去,乙,商店,购,买较,为,合,算,.,(,3,),解,:由,题,意得,:,200,+,10,=,225,+,9,,,解,得,:,=,25,,,故,购,买,25,盒,乒,乓球,时,,甲,乙,两家,商,店所,需,费用,一,样,.,