周训练题三
2020年六年级上册数学试题-第五章《圆》专项训练三人教新课标

2020学年人教版六年级上册数学第五章检测一.选择题(共11小题)1.两个圆的周长不相等,是因为()A.圆心位置不同B.圆周率不同C.半径大小不同2.画圆时圆规两脚间的距离是3厘米,画出的圆的周长是()厘米.A.7.065B.9.42C.18.84D.28.263.一个半圆形,它的面积是8π,它的周长是()A.4π+8B.π+2C.4π+44.圆的半径扩大2倍后,它的面积与原来比()A.扩大2倍B.扩大4倍C.不变5.大小不同的两个圆,它们的半径各增加2厘米,那么圆的面积增加得多的是()A.大圆B.小圆C.一样大D.无法确定6.小圆的直径等于大圆的半径,小圆的面积等于大圆面积的()A.B.C.D.7.两个圆的周长相等,这两个圆的面积()页1A.不一定相等B.一定不相等C.一定相等D.无法判断大小8.小明的妈妈要买一块台布盖住家中一张直径1米的圆形桌面,你认为选()种比较合适.A.120厘米×120厘米B.120厘米×80厘米C.3140平方厘米D.314平方厘米9.大圆与小圆的半径比是5:4,那么大圆与小圆的面积比是()A.16:25B.4:5C.25:16D.5:410.图中的两个小圆的周长的和与大圆的周长比较,()A.一样长B.大圆的周长长C.大圆的周长短D.无法比较11.手工课上花花用一张长20厘米、宽16厘米的长方形卡纸,剪一个最大的圆.圆形纸片的面积是()A.314 cm2B.320 cm2C.200.96 cm2二.填空题(共9小题)页2分米,面积是平方分米.13.半径是3cm的圆的周长是cm,面积是cm2.(π取3.14)14.一个圆的周长是62.8分米,半径是分米,面积是平方分米.15.圆的面积计算公式也可以这样推导:我发现:(1)所拼成的梯形面积与原来的圆形面积;(2)所拼成的梯形的上底等于原来周长的,下底等于原来周长的.(3)所拼成的梯形的高是原来圆的.通过转化,根据梯形面积的计算公式可以推出:圆的面积S=.16.在一块长是4m,宽是2m的长方形铁板上截下一块最大的半圆形铁板,这个半圆形铁板的面积是.17.画圆时可以知道,必须知道与,决定所画圆的位置,决定所画圆的大小.画圆时,把圆规的两脚分开,定好的两脚间的距离,即是该圆的长度.页3平方分米,余下的面积是平方分米.19.画一个周长为12.56cm的圆,圆规的两脚之间的距离应该是cm,所画圆的面积是.20.画一个周长是18.84厘米的圆,圆规两脚尖之间的距离应为厘米,这个圆中最长的线段长厘米.三.判断题(共7小题)21.一个半圆的直径等于同圆直径的一半..(判断对错)22.大圆的圆周率与小圆的圆周率相等..(判断对错)23.一个半径是2cm的圆,面积和周长相等..(判断对错)24.圆的周长除以它的直径等于3.14..(判断对错)25.已知正方形的边长等于圆的直径,那么正方形的面积大于圆的面积..(判断对错)26.如图,有3个大小相同的圆,它们的阴影部分周长一样长..27.同一个圆中,直径永远都是半径的2倍..(判断对错)四.应用题(共4小题)28.将圆平均分成若干个小扇形,剪拼成一个近似的长方形(如图).页4(1)如果长方形的长是12.56厘米,圆的面积是多少?(2)如果圆的半径是10厘米,阴影部分的面积是多少?29.城市建设局要在一个直径为30m的圆形花坛的周围修一条宽2m的石子小路.①圆形花坛的面积是多少平方米?②请你算一算这条路的面积是多少平方米?③如果修路每平方米的造价约100元,那么铺好这条路约需要多少元?30.一块圆形的菜板,在它的周围箍一根长2.552m的铁丝,铁丝的接头处用去了0.04m,这块菜板的直径是多少米?页531.一个圆形喷水池的直径是6m,在喷水池外距离水池边0.5m处围上一圈围栏,围栏全长多少米?五.解答题(共8小题)32.一根铁丝正好能围成直径是6厘米的圆,如果把它围成一个正方形,则这个正方形的边长是多少?33.已知弧长为1,所对应的圆心角是n度,对应的半径为r,根据已知条件,求出下列各题中未知的量:(1)已知半径r=2,弧长l=12.56,求圆心角n;(2)已知圆心角n=72度,半径r=3,求弧长l;(3)已知半径n=108度,弧长l=28.26,求半径r.34.先画一个长是6厘米,宽是3厘米的长方形,再以长为直径,在长方形内画一个半圆,并求出半圆的周长和面积,并画出这幅图的对称轴.页635.如图是一个边长分别为a、b、c的直角三角形,并且c2=a2+b2.请你分别以直角三角形的三边中点为圆心,以边长为直径在直角三角形外画半圆.这三个半圆面积是什么关系?并说明理由.36.用铅笔画一个直径是3厘米的圆,并在圆里以直径为底作一个最大的三角形,计算三角形的面积?37.图中正方形的面积是40平方厘米,圆的面积是多少平方厘米?页738.①在如图所示的正方形内画一个最大的圆形,并把确定圆心的方法用图标出来.②圆的周长与正方形的周长比较,哪个图形的周长长?请说出理由.39.李大爷用长15.7米的栅栏靠墙围了一个半圆形的鸡舍,这个鸡舍的面积是多少平方米?页8【解析版】一.选择题(共11小题)1.两个圆的周长不相等,是因为()A.圆心位置不同B.圆周率不同C.半径大小不同【解答】解:由“圆的周长=2πr”可知:圆的周长和半径、圆周率有关系,因为圆周率不变,所以只与半径有关,则两个圆的周长不相等,是因为半径大小不同.故选:C.2.画圆时圆规两脚间的距离是3厘米,画出的圆的周长是()厘米.A.7.065B.9.42C.18.84D.28.26【解答】解:2×3=6(厘米)3.14×6=18.84(厘米)答:画出的圆的周长是18.84厘米.故选:C.3.一个半圆形,它的面积是8π,它的周长是()A.4π+8B.π+2C.4π+4【解答】解:半径的平方:8π×2÷π=16因为4×4=16页9所以半圆形的半径为4,它的周长:(π+2)×4=4π+8答:它的周长是4π+8.故选:A.4.圆的半径扩大2倍后,它的面积与原来比()A.扩大2倍B.扩大4倍C.不变【解答】解:根据S=πr2;半径扩大2倍后为2r,所以得:S扩=π(2r)2,=4πr2;所以它的面积扩大为原来的4倍;故选:B.5.大小不同的两个圆,它们的半径各增加2厘米,那么圆的面积增加得多的是()A.大圆B.小圆C.一样大D.无法确定【解答】解:圆的面积=πr2,半径增加2厘米,则面积为:π(r+2)2,页10由此可得,半径增加2厘米,大圆的面积增加的多.故选:A.6.小圆的直径等于大圆的半径,小圆的面积等于大圆面积的()A.B.C.D.【解答】解:设小圆的半径为r,则大圆的半径就是2r,大圆的面积为:π(2r)2=4πr2,小圆的面积为:πr2,πr2÷4πr2=.答:小圆的面积等于大圆面积的.故选:B.7.两个圆的周长相等,这两个圆的面积()A.不一定相等B.一定不相等C.一定相等D.无法判断大小【解答】解:根据圆的周长公式:C=2πr,可以得出两个圆周长相等,则它们的半径就相等;再根据圆的面积公式:S=πr2,半径相等则面积就相等.故选:C.8.小明的妈妈要买一块台布盖住家中一张直径1米的圆形桌面,你认为选()种比较合适.页11A.120厘米×120厘米B.120厘米×80厘米C.3140平方厘米D.314平方厘米【解答】解:因为120×120的桌布的边长为120厘米,大于圆桌的直径100厘米,所以选用120×120的桌布比较合适;故选:A.9.大圆与小圆的半径比是5:4,那么大圆与小圆的面积比是()A.16:25B.4:5C.25:16D.5:4【解答】解:设小圆的半径是4r,则大圆的半径为5r,则:[π(5r)2]:[π(4r)2],=25πr2:16πr2,=25:16;故选:C.10.图中的两个小圆的周长的和与大圆的周长比较,()A.一样长B.大圆的周长长C.大圆的周长短D.无法比较页12【解答】解:大圆的周长是:C=2πR,两个小圆的周长的和是:2πr1+2πr2=2π(r1+r2),根据图知道,R=r1+r2,所以2πR=2πr1+2πr2,即:图中的两个小圆的周长的和与大圆的周长相等;故选:A.11.手工课上花花用一张长20厘米、宽16厘米的长方形卡纸,剪一个最大的圆.圆形纸片的面积是()A.314 cm2B.320 cm2C.200.96 cm2【解答】解:3.14×(16÷2)2=3.14×64=200.96(cm2)答:圆形纸片的面积是200.96cm2.故选:C.二.填空题(共9小题)12.要在边长是4分米的正方形硬纸板上减去一个最大的圆,这个圆的半径是2分米,面积是12.56平方分米.【解答】解:4÷2=2(分米)3.14×22=3.14×4页13=12.56(平方分米)答:这个圆的半径是2分米,面积是12.56平方厘米.故答案为:2、12.56.13.半径是3cm的圆的周长是18.84cm,面积是28.26cm2.(π取3.14)【解答】解:3.14×3×2=18.84(厘米),3.14×32=3.14×9=28.26(平方厘米),答:这个圆的周长是18.84厘米,面积是28.26平方厘米.故答案为:18.84、28.26.14.一个圆的周长是62.8分米,半径是10分米,面积是314平方分米.【解答】解:62.8÷3.14÷2=20÷2=10(分米)3.14×102=314(平方分米)答:它的半径是10分米,面积是314平方分米.故答案为:10,314.15.圆的面积计算公式也可以这样推导:页14页 15我发现:(1)所拼成的梯形面积与原来的圆形面积 相等 ; (2)所拼成的梯形的上底等于原来周长的,下底等于原来周长的.(3)所拼成的梯形的高是原来圆的 直径 .通过转化,根据梯形面积的计算公式可以推出:圆的面积S = πr 2 . 【解答】解:(1)把圆剪拼成一个计算梯形后,只是形状变了,但面积不变,所以拼成梯形的面积与原来圆的面积相等.(2)所拼成的梯形的上底等于原来周长的,下底等于原来周长的. (3)所拼成的梯形的高是原来圆的直径.(4)根据梯形的面积公式:S =(a +b )h ÷2,所以圆的面积公式:S =πr 2. 故答案为:相等;、;直径;πr 2.16.在一块长是4m ,宽是2m 的长方形铁板上截下一块最大的半圆形铁板,这个半圆形铁板的面积是 6.28平方米 . 【解答】解:3.14×22÷2 =3.14×4÷2=6.28(平方米)答:半圆形铁板的面积是6.28平方米.故答案为:6.28平方米.17.画圆时可以知道,必须知道圆心与半径,圆心决定所画圆的位置,半径决定所画圆的大小.画圆时,把圆规的两脚分开,定好的两脚间的距离,即是该圆半径的长度.【解答】解:画圆时可以知道,必须知道圆心与半径,圆心决定所画圆的位置,半径决定所画圆的大小.画圆时,把圆规的两脚分开,定好的两脚间的距离,即是该圆半径的长度.故答案为:圆心,半径,圆心,半径,半径.18.在边长是8分米的正方形纸板上剪下一个最大的圆,这个圆的面积是50.24平方分米,余下的面积是13.76平方分米.【解答】解:8÷2=4(分米)3.14×42=3.14×16=50.24(平方分米)8×8﹣50.24=64﹣50.24=13.76(平方分米)答:这个圆的面积是50.24平方分米,余下的面积是13.76平方分米.故答案为:50.24,13.76.页1619.画一个周长为12.56cm的圆,圆规的两脚之间的距离应该是2cm,所画圆的面积是12.56cm2.【解答】解:12.56÷3.14÷2=2(cm)画圆如下:3.14×22=3.14×4=12.56(cm2)答:圆规的两脚之间的距离应该是2cm,所画圆的面积是12.56cm2.故答案为:2,12.56cm2.20.画一个周长是18.84厘米的圆,圆规两脚尖之间的距离应为3厘米,这个圆中最长的线段长6厘米.【解答】解:18.84÷3.14÷2=6÷2=3(厘米)3×2=6(厘米)答:圆规两脚尖之间的距离应为3厘米,这个圆中最长的线段长6厘米.页17三.判断题(共7小题)21.一个半圆的直径等于同圆直径的一半.×.(判断对错)【解答】解:根据圆的特征可得:在同一圆里,所有的直径都相等;所以半圆的直径等于同圆的直径,原题说法错误;故答案为:×.22.大圆的圆周率与小圆的圆周率相等.√.(判断对错)【解答】解:因为任意圆的圆周率=圆的周长÷圆的直径,圆周率是一个定值,用π表示,所以大圆的圆周率与小圆的圆周率相等.故判断为:√.23.一个半径是2cm的圆,面积和周长相等.×.(判断对错)【解答】解:面积与周长的定义不同:圆的表面或围成的圆形表面的大小,叫做圆的面积;围成圆的一周的长度叫做这个圆的周长;所采用的计量单位也不同:此题中,周长的单位是厘米,面积的单位是平方厘米,单位不能统一,所以没法比较它们的大小.所以原题说法错误.故答案为:×.24.圆的周长除以它的直径等于3.14.×.(判断对错)【解答】解:由圆周率的含义可知:圆的周长与直径的比值等于3.14,说法错误;故答案为:×.页1825.已知正方形的边长等于圆的直径,那么正方形的面积大于圆的面积.正确.(判断对错)【解答】解:设正方形的边长为4厘米,则圆的半径为2厘米,正方形的面积为:4×4=16(平方厘米),圆的面积为:3.14×22=12.56(平方厘米),所以正方形的面积大于圆的面积.故答案为:正确.26.如图,有3个大小相同的圆,它们的阴影部分周长一样长.正确.【解答】解:观察图形可知:(1)图1中阴影部分的四个圆弧的长度加起来正好等于圆的周长;(2)图2中阴影部分外外圈是圆的周长的一半,内圈3个小半圆弧长之和等于大半圆的弧长,所以阴影部分的周长等于圆的周长;(3)图3中大半圆内的两个白色小半圆的弧长之和等于大半圆的弧长相等,所以图中阴影部分的周长等于圆的周长,因为三个圆的大小相等,所以阴影部分的周长一样长.故答案为:正确.27.同一个圆中,直径永远都是半径的2倍.√.(判断对错)【解答】解:同一个圆的直径一定是半径的2倍,页19所以原题说法是正确的.故答案为:√.四.应用题(共4小题)28.将圆平均分成若干个小扇形,剪拼成一个近似的长方形(如图).(1)如果长方形的长是12.56厘米,圆的面积是多少?(2)如果圆的半径是10厘米,阴影部分的面积是多少?【解答】解:(1)圆的半径:12.56×2÷(2×3.14)=25.12÷6.28=4(厘米)圆的面积:3.14×42=3.14×16=50.24(平方厘米)答:圆的面积是50.24平方厘米.(2)阴影部分的面积:3.14×102×页20=314×=235.5(平方厘米)答:阴影部分的面积是235.5平方厘米.29.城市建设局要在一个直径为30m的圆形花坛的周围修一条宽2m的石子小路.①圆形花坛的面积是多少平方米?②请你算一算这条路的面积是多少平方米?③如果修路每平方米的造价约100元,那么铺好这条路约需要多少元?【解答】解:①×3.14=225×3.14=706.5(平方米);答:花坛的面积是706.5平方米.②×3.14﹣152×3.14=(15+2)2×3.14﹣152×3.14=289×3.14﹣225×3.14=907.46﹣706.5=200.96(平方米);答:这条小路的面积是200.96平方米.页21③200.96×100=20096(元);答:铺好这条路约需要20096元.30.一块圆形的菜板,在它的周围箍一根长2.552m的铁丝,铁丝的接头处用去了0.04m,这块菜板的直径是多少米?【解答】解:(2.552﹣0.04)÷3.14=2.512÷3.14=0.8(米),答:这块菜板的直径是0.8米.31.一个圆形喷水池的直径是6m,在喷水池外距离水池边0.5m处围上一圈围栏,围栏全长多少米?【解答】解:(6+0.5+0.5)×3.14=7×3.14=21.98(m)答:围栏全长21.98米.五.解答题(共8小题)32.一根铁丝正好能围成直径是6厘米的圆,如果把它围成一个正方形,则这个正方形的边长是多少?【解答】解:3.14×6÷4=18.84÷4=4.71(厘米)页22答:正方形的边长是4.71厘米.33.已知弧长为1,所对应的圆心角是n度,对应的半径为r,根据已知条件,求出下列各题中未知的量:(1)已知半径r=2,弧长l=12.56,求圆心角n;(2)已知圆心角n=72度,半径r=3,求弧长l;(3)已知半径n=108度,弧长l=28.26,求半径r.【解答】解:(1)n==360(度)答:圆心角是360度.(2)l==3.768答:弧长是3.768.(3)r==15答:半径是15.34.先画一个长是6厘米,宽是3厘米的长方形,再以长为直径,在长方形内画一个半圆,并求出半圆的周长和面积,并画出这幅图的对称轴.【解答】解:(1)(3)画图如下:页23(2)3.14×6÷2+6=18.84÷2+6=9.42+6=15.42(厘米);3.14×32÷2=3.14×9÷2=14.13(平方厘米).35.如图是一个边长分别为a、b、c的直角三角形,并且c2=a2+b2.请你分别以直角三角形的三边中点为圆心,以边长为直径在直角三角形外画半圆.这三个半圆面积是什么关系?并说明理由.【解答】解:如图:设直角三角形的三边分别为a、b、c,则因为三个半圆的面积分别是:×π()2=πa2页24×π()2=πb2所以πa2+πb2=π(a2+b2)而a2+b2=c2,所以πa2+πb2=πc2.所以以直角三角形的两条直角边为直径的半圆面积和等于以斜边为直径的半圆面积.36.用铅笔画一个直径是3厘米的圆,并在圆里以直径为底作一个最大的三角形,计算三角形的面积?【解答】解:如图所示:3×(3÷2)÷2=3×1.5÷2=4.5÷2=2.25(平方厘米);答:这个三角形的面积是2.25平方厘米.37.图中正方形的面积是40平方厘米,圆的面积是多少平方厘米?页25【解答】解:3.14×40=125.6(平方厘米)答:这个圆的面积是125.6平方厘米.38.①在如图所示的正方形内画一个最大的圆形,并把确定圆心的方法用图标出来.②圆的周长与正方形的周长比较,哪个图形的周长长?请说出理由.【解答】解:(1)以正方形的对角线的交点为圆心,以正方形的边长的一半(2÷2=1厘米)为半径,画圆如下:(2)因为正方形周长是把边长扩大4倍,而圆的周长是把正方形边长(直径)扩大3.14 倍,4>3.14.所以正方形周长长.页2639.李大爷用长15.7米的栅栏靠墙围了一个半圆形的鸡舍,这个鸡舍的面积是多少平方米?【解答】解:鸡舍的半径为:15.7÷3.14=5(米),鸡舍的面积为:3.14×52÷2=39.25(平方米).答:这个鸡舍的面积是39.25平方米.页27。
【周练培优】北师大版六年级上册数学(第3周)

三、脱式计算
7.脱式计算(能简算的要简算)。
2×
×46÷ ÷6 ×11÷ ×11
四、解方程或比例
8.解方程。
x-20%x=8.24
五、图形计算六、看图列式
9.求阴影部分的面积。10.看图列式。
七、解答题
11.小明读一本书,第一天读了 ,第二天读了45页,还剩下80页没读,这本书一共多少页?
【周练培优】北师大版六年级上册数学(第3周)
一、填空题
1.比15千克多 ,75米比少 。
2.女生有20人,比男生少 ,男生有ห้องสมุดไป่ตู้ )人。
3.长跑锻炼时,张涛每天跑1.8km,比秦明每天多跑 。秦明每天跑( )km。
二、判断题
4.周长相等的两个圆,它们的面积也一定相等。( )
5.男生人数比女生多 ,女生人数就比男生少 。( )
12.一个圆形游乐场的周长是62.8米,扩建时,半径增加了1米,面积增加了多少平方米?
13.超市运进一批大米,第一天卖了总数的 ,第二天比第一天少卖了 ,两天后还剩下20袋。这批大米一共有多少袋?
三年级面积和周长训练题

三年级面积和周长训练题长方形和正方形的周长面积应用题是三年级下册的重点和难点。
周长是指封闭图形一周的长度,长度单位是千米、米、分米、厘米、毫米;面积是指平面图形所占的大小,面积单位是平方米、平方分米、平方厘米。
下面小编给大家整理了一部分关于周长和面积的练习题,一起来看看吧。
习题部分:1、一个长方形操场,长55米,宽35米,这个操场的周长和占地面积各是多少?2、一块长方形菜地的长是75米,是宽是3倍,这块菜地的周长和占地面积各是多少?3、用6个边长1厘米的小正方形拼成一个大长方形,拼成的长方形的长和宽各是多少厘米?周长是多少厘米?4、一个长方形的花园,四周围了136米长的竹篱笆,宽边篱笆长30米,这个花园占地面积是多少?5、小明绕正方形操场跑了3圈共计1200米,求这个操场的周长和占地面积各是多少?6、把一张长36厘米,宽18厘米的长方形纸片,剪成两个最大的正方形,其中一个正方形的周长和面积各是多少?7、一部电视机荧光屏是个长方形,它的宽是34厘米,比长短10厘米,它的周长和面积各是多少?8、一个长方形花坛的长是5米,宽是3米。
这个花坛的周长和面积各是多少米?9、用一张长6厘米、宽4厘米的长方形纸剪一个最大的正方形。
这个正方形的周长和面积各是多少?10、一个正方形的边长是8厘米,如果把它的边长增加10厘米,那么它的周长和面积分别增加多少?答案部分:1、周长:(55+35)×2=180(米)面积:55×35=1925(平方米)2、周长:75÷3×(3+1)×2=200(米)面积:75÷3×75=1875(平方米)3、(1)宽1厘米,长6厘米周长:(1+6)×2=14(厘米)面积:1×6=6(平方厘米)(2)宽2厘米,长3厘米周长:(2+3)×2=10(厘米)面积:2×3=6(平方厘米)4、周长:136÷2-30=38(米)面积:38×30=1140(平方米)5、周长:1200÷3=400(米)面积:400÷4=100(米)100×100=10000(平方米)6、周长:18×4=72(厘米)面积:18×18=324(平方厘米)7、长:34+10=44(厘米)周长:(34+44)×2=156(厘米)面积:34×44=1496(平方厘米)8、周长:(5+3)×2=16(米)面积:5×3=15(平方米)9、周长:4×4=16(厘米)面积:4×4=16(平方厘米)10、周长:10×4=40(厘米)面积:10+8=18(厘米)18×18-8×8=260(平方厘米)。
第三周 综合训练题

第三周综合训练题
郭延庆
【期刊名称】《天府数学》
【年(卷),期】1999(000)007
【摘要】一、一元选择题(每小题3分,共45分)1.-|-2|的倒数是()(A)-2(B)-12(C)12(D)22.(-a3)2÷(-a)的运算结果是()(A)a6(B)-a6(C)a5(D)-a53.如果一个多边形的内角和等于它的外角和的2倍,那么这个多边形是()(A)三角形(B)四边形(C)五边形(D)六边形4.如果实数x、y满足|x+2|+(x-12y)2=0,那么xy的值等于()(A)-116(B)116(C)-18(D)185.当锐角A>30°,cos
A的值()(A)小于12(B)小于32(C)大于12(D)大于326.要使分式|x|-22x2-x-6
【总页数】2页(P81-82)
【作者】郭延庆
【作者单位】成都市教科所!610031
【正文语种】中文
【中图分类】O1
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求图形的周长专题训练(试题)-2021-2022年数学人教版三年级上册

1.60米;29厘米
2.48cm
3.24cm;28cm
4.36厘米;36厘米
5.12米
6.240厘米;90厘米
24厘米;240厘米
7.420厘米;24米
8.22cm
9.26厘米;22厘米
10.320
11.120厘米
12.48厘米;24分米;
13.12厘米;12厘米
14.24cm;80厘米
380;36
15.36厘米;
16.30厘米
17.200米
32米
1200米
18.19分米;64毫米;38厘米
19.50厘米;
20.24米;58米;12分米
21.72分米;20厘米
22.59m;200cm
23.26厘米;32分米;32米
24.80厘米
60厘米
120分米
25.160米;220米
26.8;10;
27.17分米;100厘米;32分米
18.计算下面图形的周长。
19.计算下列图形的周长。(单位:ຫໍສະໝຸດ 米)20.求下面图形的周长。
21.计算下面图形中阴影部分的周长。
22.计算下列图形的周长。
23.计算下面图形的周长。
24.求下面图形的周长。
25.计算周长。
26.先量一量,再计算图形的周长。(单位:厘米)
27.求下面图形的周长。
28.计算下面图形的周长。(单位:厘米)
10.请计算下面图形的周长。
11.计算下边图形的周长。(单位:厘米)
12.出下面长方形和正方形的周长。
13.计算下面图形的周长。
14.求下面各图的周长。
(台阶长3厘米,宽2厘米)
15.求下面图形的周长。
高考英语一轮复习 周周练试题 周三M2U3

入舵市安恙阳光实验学校高考英语一轮复习系列训练(M2)星期三(U3-M2)第一节单项填空1. The boy was last seen near the West Lake.A. missing; playingB. missing; playC. missed; playedD .missed; to play2. It was dangerous for you to swim in that river. You eatenby the fish.A. might have beenB. must have beenC. could have beenD. should have been3. Let’s hold a party to your birthday and at the same timeyou on your passing the driving test.A. congratulate; celebrateB. celebrate; celebrateC. celebrate; congratulateD. congratulate;congratulate4. We walk in the moonlight, talking about we were interested in.A. used to; all whatB. were used to; all thatC. used to; whatD. were used to; what5. It is a paradox that in a rich country there should be many poor people. A. such; such B. such; so C. so; so D. so; such6. The boy wanted to ride his father’s new motorcycle in the crowedstreet but his father told him .A. not to doB. not toC. not do itD. do not so7. The students were told that they at the school gate at 2:00 o’clock.A. metB. will meetC. were to meetD. were met8. I couldn’t find Peter, did I know where he had gone.A. neitherB. norC. soD. and9. __________ , but also they are good friends.A. Not only does he know JimB. Not only he knows JimC.Not does he only know Jim D. Does not only he knows Jim10. During the football match, he hurt his arm as well as his leg.A. breakB. breaksC. breakingD. broke11. He goes to the gymnasium for physical training day.A. every eachB. every oneC. each other;D. every other12. Athletes compete the Olympic Games the honor of winning.A. in; againstB. in; forC. against; inD. for; for13. The German Nazis were considered the Amber Room during World War II.A. to have stolenB. stealingC. having stolenD. to steal14. The weather turned out to be very good, was more thanwe could expect.A. whatB. whichC. thatD. it15. He had me to come to my birthday party, but he didn’t show up.A. allowedB. promisedC. wantedD. advised16. Which of the following sentences is NOT right?A. There is no doubt that you will succeed.B. We have no doubt that you will succeed.C. We don’t doubt that you will succeed.D. We don’t doubt whether you will succeed17. Take away whatever you.A. belong toB. belongs toC. belonging toD. is belonged to18. The old woman has been ill for several months but is beginning to pick .A. outB. offC. upD. on19. When winter comes, some birds fly to the south and stay.A. anotherB. otherC. othersD. the other20. He told me about the news in a voice.A. amazing; surprisingB. amazed; surprisedC. amazing; surprisedD. amazed; surprising21. The chairman told the speaker that she ___ to speak a littlelouder so as to make herself _____.A. was expected; heardB. had expected; hear C had hoped;hear D. was hoped; heard22. Do you think that the bridge ______ in a year?A. would be completedB. will be completedC. had beencompleted D. is being completed23. The window ______, you need not wash it again.A. washedB. is washedC. has been washedD. will be washed24.John had to have his car repaired in a garage because it____seriously.A. damagedB. was being damagedC. had damagedD. had been damaged25. The police found that the house _______and a lot of things _____A. has broken into; has been stolenB. had broken into; had been stolenC. has been broken into; stolenD. had been broken into; stolen第二节完形填空Dear Classmates,As young people, we don’t always want to think about the past.26 we often hear our grandfathers and grandmothers talk about cultural relics. They say we 27 protect some of these relics because they are important to our culture. 28 also say that these relics are important to us because they help us remember the 29 of our ancestor s and respect what they have done. I’m sure you will 30 . After all, someday we will be 31 ourselves and will want our own children to protect them. So I have a plan for32 the painting in the old temple, which is a fine cultural relic33 in our hometown. It should be protected because it was painted by a 34__ artist of the early Qing Dynasty. My plan is to get students to take a 35 to see it on a Saturday next month and then 36 some important people to join us. 37 , we can also write 38 about it for the town newspaper. Later, when others begin to 39 their help, perhaps we can 40 enough money to help the museum buy it. If you like my plan, please give me a note to your teacher. Thank you.Yours.26. A. However B. Yet C. Therefore D. And27. A. can B. must C. will D. need28. A. Some B. We C. They D. Others29. A. days B. dreams C. lives D. styles30. A. refuse B. allow C. doubt D. agree31. A. greater B. stronger C. richer D. older32. A. surviving B. remaining C. saving D. removing33. A. there B. here C. where D. anywhere34. A. famous B. rare C. gifted D. skillful35. A. trip B. look C. bus D. rest36. A. take B. order C. beg D. ask37. A. In a word B. Besides C. First of all D. By the way38. A. a poem B. a passage C. an article D. a diary39. A. prove B. offer C. supply D. provide40. A. make B. earn C. raise D. give第三节语法填空Over time I have been changed quite a lot. I began 41__________ a calculating machine in France in 1642. 42______________ I was young I could simplify difficult sums. I developed very43(slow)________ and it took nearly two hundred years44_______________ I was built as an analytical machine by Charles Babbage. After I was programmed 45____________ an operator who used cards with holes, I could “think”logical and produce46_____________ answer quicker than any person.At that time 47_____________ was considered a technological revolution and the start of my “artificial intelligence”. In 1936 my real father, Alan Turing, wrote a book 48____________ how I could be made to work as a “universal machine”49(solve)________________ any difficult mathematical problem. From then on, I grew rapidly 50_____________ in size and in brainpower.41____________42_____________43_________________44____________ __45_____________46____________47_____________48_________________49______________50_____________第四节阅读理解AEddie McKay, a once-forgotten pilot, is a subject of great interest to a group of history students in Canada.It all started when Graham Broad, a professor at the University of Western Ontario, found McKay’s name in a footnote in a book about university history. McKay was included in a list of university alumni (校友) who had served during the First World War, but his name was unfamiliar to Broad, a specialist in military history. Out of curiosity, Broad spent hours at the local archives (档案馆) in a fruitless search for information on McKay. Tired and discouraged, he finally gave up. On his way out, Broad’s glance happened to fall on an exhibiting case showing some old newspapers. His eye was drawn to an old picture of a young man in a rugby uniform. As he read the words beside the picture, he experienced a thrilling realization. “After looking for him all day, there he was, staring up at me out of the exhibiting case,” said Broad. Excited by the find, Broad asked his students to continue his search. They combed old newspapers and other materials for clues. Gradually, a picture came into view.Captain Alfred Edwin McKay joined the British Royal FlyingCorps in 1916. He downed ten enemy planes, outlived his entire squadron (中队) as a WWI flyer, spent some time as a flying instructor in England, then returned to the front, where he was eventually shot down over Belgium and killed in December 1917. But there’s more to his story. “For a brief time in 1916 he was probably the m ost famous pilot in the world,” says Broad. “He was credited with downing Oswald Boelcke, the most famous German pilot at the time.” Yet, in a letter home, McKay refused to take credit, saying that Boelcke had actually crashed into another German plane.Mc Kay’s war records were destroyed during a World War II air bombing on London — an explanation for why he was all but forgotten.But now, thanks to the efforts of Broad and his students, a marker in McKay’s memory was placed on the university grounds in Nov ember 2007. “I found my eyes filling with tears as I read the word ‘deceased’ (阵亡)next to his name,” said Corey Everrett, a student who found a picture of Mckay in his uniform. “This was such a simple example of the fact that he had been a student just like us, but instead of finishing his time at Western, he chose to fight and die for his country.”51. What made Professor Broad continue his search for more information on McKay?A. A uniform of McKay.B. A footnote about McKay.C. A book on McKay.D. A picture of McKay.52. What did the students find out about McKay?A. He trained pilots for some time.B. He lived longer than other pilots.C. He died in the Second World War.D. He was downed by the pilot Boelcke.53. McKay’s flying document s were destroyed in .A. BelgiumB. GermanyC. CanadaD. England54. We can learn from the last paragraph that McKay .A. preferred fight to his studyB. went to war before graduationC. left a picture for Corey EverrettD. set an example for his fellow students55. What is the text mainly about?A. The research into war history.B. The finding of a forgotten hero.C. The pilots of the two world wars.D. The importance of military studies.BEvery object tells a story. Even the most ordinary objects can present to us powerful images. Sometimes it is the ordinary nature of these objects that actually makes them so extraordinary. Such is the case with an old leather shoe in a museum in Alaska. At first glanc e it does not look like much. It is a woman’s shoe of a style popular in the 1890s. But what is unique(独特的) about this shoe is where it was found. It was discovered on the Checkout Pass, the famous trail used by the people seeking gold in Alaska. Who it belonged to or why it was left there is not known. Was it perhaps dropped by accident as the woman climbed up the 1500 stairs carved outface? Or did she throw away goods that she didn’t need in order to travel lighter?Over 100, 000 people with “gold fever” made this trip hoping to become millionaires. Few of them understood that on their way they would have to cross a harsh wildness. Unprepared for such a dangerous journey, many died of starvation and exposure to the cold weather.The Canadian government finally started requiring the gold seekers to bring one ton of supplies with them. This was thought to be enough for a person to survive for one year. They would carry their supplies in backpacks(背包) each weighing up to fifty pounds; it usually took at least 40 trips to get everything to the top and over the pass. Whoever dropped the shoe must have been a brave and determined woman. Perhaps she was successful and made it to Alaska. Perhaps she had to turn back in defeat. No one will ever know for sure, but what we do know is that she took part in one of the greatest adventures in the 19th century.56. Which of the following is right?A. it was found on a famous trailB. it was an important clue to life in the pastC. it at one time belonged to a VIPD. it was a fashionable shoe at that time57. According to this passage, many people who went to Alaska _______.A. eventually became millionairesB. were not properly equippedC. were very poorD. brought with them many shoes58. The Canadian government made gold seekers bring one year’s supplies with them so that ___.A. they would not die of hunger and coldB. the army would have enough food for fighting a warC. they would change these goods with the EskimosD. the supplies would make Alaska rich59. No matter what happened to the woman who owned the shoe, _______.A. she must have been a brave woman.B. she certainly dropped the shoe on purposeC. her adventurous spirit is definitely admiredD. her other shoes were equally fashionable60. what’s the best title of the passage?A. special shoe whose ower is a woman.B. the sad story about the shoe.C. the old shoe that has a special. story.D. gold seekersCJune 26, 2000 —the Human Genome(基因组) Project, a great $3 billion, 15-year task aimed at drawing the genetic(遗传的) map of humans, is now more than 90 percent completed. The scientific and medical communities are very excited about the chances genetic research provides for getting rid of diseases and prolonging(延长) human life. But those communities and policymakers also are careful about the scientific door they are opening as the project uncovers the mysteries of life.For the last few years, the genetic advances in the developing field of biotechnology(生物技术) have provides material for all kinds of work, but the developments of modern science in unlocking the secrets of the human genetic code have opened a world of possibilities for human health, as well as for the popular imagination.While European and Japanese researchers are making rapid progress in decoding(解码) human DNA, the leading organization for genetic research is in the United States, which began in 1990, is “unlocking the code” of the human body to learn how to defeat fatal diseases . Already, the Human Genome Project has become widely known and praised for finding the genes connected with terrible diseases as yet, and making progress toward separating the genes that show a sign of breast cancer or AIDS.Once these genes are found and studied, researchers can develop new ways to attack infections and genetic diseases. Medical companies are very interested in mapping the human genome, as they expect to develop a lot of new drugs for these illnesses.61. Why did the scientists work hard at mapping the human genome?A. Because the human genome can help us live longer.B. Because they wanted to be better known than others.C. Because the human genome can provide a lot of moneyD. Because the human genome's completion can help them get ridof many diseases.62. Which of the following is NOT true?A. If the genes can be found, scientists can study many new ways to cure illnesses.B. The scientists have made great progress in connecting the genes with the cancers.C. Many medical companies show great interest in drawing the human genome map.D. The United States began the Genes Study early in the 19th century.63. Which country studied the genes most rapidly in the world?A. Japan. C. The United States .B. British EnglandD. China.64. We can conclude that the Human Genome Project can cause_______.A. the policy makers to feel very happy.B. the scientists to work harderC. many people to live longer.D. a lot of companies to produce many new drugs65. What’ the best title of the passage?A. unlocking genetic codeB. the genes' discoveryC. human genome’s scienceD. the genes and the scientistsDGeorge Markov was a famous writer in Bulgaria. In 1969 he suspected that he was going to be imprisoned or killed because one of his plays was regarded as being an attack on leaders of Bulgaria. Markov managed to reach England and got a job with the BBC, writing something in Bulgaria.Some of the BBC programmes were critical of life in Bulgaria. Perhaps as a result of this, Markov received an anonymous telephone call warning him that he would be killed. In September 1978, Markov stopped his car in London and started to walk to his office. When he was passing a bus line, a man in the line seemed to drop his umbrella accidently. Markov felt a sudden pain in the leg.When Markov reached his office, he spoke about the matter to a friend. A few hours later, he began to feel hot. He was sent to hospital and died four days later. The doctors examined his body, and they were puzzled about the cause of his death. Scientists were asked to help and they found a tiny metal pellet in Markov’s leg. The scientists believed that the two holes in it must contain an unknown poison in them.A few weeks before Markov was “shot” with a poisonedpellet fired from an umbrella, another Bulgarian had the same experience in France. Towards the end of August 1978, Kostov felt a sharp pain in the back when he was leaving a railway station in Paris. He was ill for a few days but became well. When news of Markov’s death became known, Kostov was asked to return to hospital for examination. Doctors found a tiny pellet in his back, but it had stuck in an area from which the poison had not been able to spread.The police in both countries are still searching for the reasons why both men were attacked. They hoped to catch their attackers. 66.Which of the statement is right about the underlined word?A.stranger B.well-known C.friendly D. unknown67.Which of the following was not mentioned in the passage?A.George Markov was working for the BBCB.George Markov wrote many plays at that timeC.kostov was “shot” with a poisoned pelletD.Both kostov and George Markov died at last 68.According to the passage, Markov’s suspicions turned out to beA.wrong B.rightC.reasonable D.unreasonable 69.Who killed Markov?A.Bulgarian B.notknown C. French D.British70. We can infer that _________A. Leaders in Bulgaria disliked George MarkovB. The police didn’t find the person who killed George MarkovC. George Markov wrote some critical playsD. George Markov lived in Bulgaria all his life答案星期三(U3-M2)第一节单项填空1-5 A A C C B 6-10 B C B A C 11-15 D B A B B 16-20 D B C C C 21-25 A B C D D第二节完形填空26-30. BBCCD 31-35. DCBAA 36-40. DBCBC第三节语法填空41. as 42. although 43. slowly 44. before 45. by46. an 47. it 48. about 49. to solve 50. both第四节阅读理解51-55 DADBB 56-60 ABACC 61-65 DDCBA 66-70 DBBA。
三年级数学上册关于周长的提高训练题解析

三年级数学上册关于周长的提高训练题解析第一题:小樱每天下午完成功课后,都会绕着小区里的健身广场跑步,这个健身广场的周长是多少米?题目中的周长指的是跑一圈的长度,题中告诉我们:每次跑6圈,一共跑了540米,相当于跑了几个周长?(6个),要求一个周长是多少?我们可以简化一下这个题,把540平均分成6分(一圈为一份),每份是多少(即每圈)?所以用除法:540除以6=90(米)第二题:王阿姨想靠着墙边用篱笆围一个长方形的小花园,买篱笆需要多少元?从题目中知道,1米篱笆需要9元,所以我们必须求出围这样一个小花园需要多少米的长度,实际上就是求这个周长方形的周长,思考一下,是否是一个完整的长方形周长呢?如何理解少了一条长边还是短边呢呢?还要注意题中的单位没有统一,最后还必须把分米统一为“米”所需篱笆的长度:长+宽X2=48+16X2=80(分米)80分米=8米买篱笆所需要的钱:8X9=72(元)答:略。
第三题:按要求算一算:(1)把这个正方形剪成3个完全相同的小长方形,每个小长方形的周长是多少?剪开后2个小长方形周长的总和是多少?这样的题,我们一定要学会画图来帮助我们理解:左边为原图,右边为剪开后的图形,认真观察剪开后的小长方形的长和宽分别是多少?再用长方形的周长计算方法即可完成(因为比较简单,只要画图就能明白,不列出算式,答案为:一个小长方形的周长36厘米,两个小长方形的周长为72厘米)(2)把这个正方形剪成3个完全相同的小长方形,剪开后3个小长方形周长的总和是多少?按照此题进行画图如下:正常思路先求出每个长方形的长和宽,周长,再求三个长方形的周长。
(答案:96)这儿主要想提醒孩子们思考,从左边到右边剪成完全相同的三个小长方形的,增加了哪些长度?如果能够观察出来,也可以在原来正方形周长的基础上加上新增加的长度,同样可以得到三个小长方形的总周长,试动一下脑筋,挖掘一下我们的潜力。
第四题:一根铁丝正好可以围成一个长8厘米、宽6厘米的长方形,如果用这根铁丝围成一个最大的正方形,那么这个正方形的边长是多少厘米?思考,把求正方形的边长是多少,就必须先知道正方形的周长,可题中并没有直接告诉我们周长啊?但是我们用的是同一根铁丝,所以不管他们围成的是长方形或者正方形,他们的周长是一样的,从题目中,我们可以根据已经条件:长8厘米,宽6厘米的长方形,求出这个长方形的周长:(8+6)X2=28(厘米),也就是正方形的周长,所以正方形的边长:周长除以4即可得到。
30道思维训练题

30道思维训练题一、逻辑推理类1. 小明说他的宠物不是狗就是猫。
如果他的宠物会汪汪叫,那他的宠物是什么?答案:狗。
因为狗会汪汪叫,而他的宠物不是狗就是猫,既然会汪汪叫那就只能是狗啦。
2. 有三个盒子,分别标着“苹果”“橙子”“苹果和橙子”。
但是每个标签都是错的。
现在你只能从一个盒子里拿出一个水果来判断所有盒子里装的是什么。
你会选择从哪个盒子拿呢?答案:从标着“苹果和橙子”的盒子拿。
如果拿出的是苹果,那这个盒子就是只装苹果的;标着“橙子”的盒子就是装苹果和橙子的;标着“苹果”的盒子就是装橙子的。
反之,如果拿出的是橙子,也能相应判断出来。
3. 一个人在森林里迷路了,他来到一个岔路口,有两条路,一条通向安全的村庄,一条通向危险的沼泽。
路口有两个小精灵,一个只说真话,一个只说假话。
他只能问其中一个小精灵一个问题,怎样才能找到去村庄的路呢?答案:随便问一个小精灵“如果我问另一个小精灵哪条路是去村庄的,他会怎么回答?”然后走相反的路就对了。
因为如果问的是说真话的小精灵,他转达的是说假话小精灵的错误答案;如果问的是说假话的小精灵,他也会把说真话小精灵的正确答案说成错误的。
二、数字规律类4. 找规律:1,1,2,3,5,8,()答案:13。
这是斐波那契数列,前两个数相加等于后面一个数,5 + 8 = 13。
5. 2,6,12,20,()答案:30。
规律是1×2 = 2,2×3 = 6,3×4 = 12,4×5 = 20,那么下一个就是5×6 = 30。
6. 1,4,9,16,()答案:25。
这些数分别是1² = 1,2² = 4,3² = 9,4² = 16,下一个就是5² = 25。
三、空间想象类7. 一个正方体有六个面,每个面都涂上红、蓝两种颜色中的一种。
至少有几个面颜色相同?答案:3个。
正方体共6个面,两种颜色平均分就是3个面一种颜色。
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育才学校一年级数学周训练题(三)
姓名___________家长签字_____________
一、我会算。
(28分)
14―8= 11―4= 9―4= 8+6= 13-9=
2+10= 8+
3= 14―9=
11―6= 6+7
= 12―12= 12―7= 16―6= 15―7= 13―7= 16―7= 12―4= 17―10= 17―8―3= 13―4+9= 14-7+5= 11-5+7= 11-6+5= 17―7―3= 18―9―9= 6+9-8= 二、我会填。
(5+8+6+3+2+8+4=36分) 1、
-7=
-9=
3、7+( )=13 8+( )=11 11-5=12-( )
12=( )+2 16=7+( ) 16-( )=15-8 4、看图列出四道算式。
○○○
○○○○○ ▲▲▲▲ ▲▲▲▲
○○○ ○○○○ ▲▲▲▲ ▲▲▲
□+□=□ □○□=□ □+□=□ □○□=□ □-□=□ □○□=□ □-□=□ □○□=□
三、看图列式(8分)
1、 2、
□○□=□( ) □○□=□( )
5、小熊的服装店。
四、用数学。
(28分)
1、要盖15幢楼房,已经盖了9幢,还要盖多少幢楼房。
□○□=□(
)
2、一共有12只羊。
(1)左边有7只,右边有几只?(2)黑羊有4只,白羊有几只?
□○□=□()□○□=□()3、小红和小丽一共剪了13朵花,小红剪了4朵,小丽送给朋友7朵,还剩多少朵?
□○□=□()
4、小白兔买了3棵菜,小灰兔买了12棵菜,
小灰兔比小白兔多买了几棵菜?小白兔比小灰兔少买了几棵菜?
□○□=□()□○□=□()5、两个小组一共有11人,其中一组有6人,另一组有几人?
□○□=□()
6.小雨和小雪共画了15朵花,小雨画了9朵,小雪画了几朵? (3分)□○□=□()
7.小明有18枝彩色笔,小刚借走了9枝,小明还有几枝? (3分)□○□=□()
8.同学们排队,小兰的前边有5人,后面有7人,这一行共有多少人? (4分)
育才学校一年级语文周训练题(三)
姓名___________家长签字_____________
一、我会看拼音,写汉字。
(13分)
f ù m ǔ xi ě w án qu án ji ā x ǐ ɡu ān x īn
d ǎ
s ǎo r
ân zh ēn
zh ōn ɡ w ǔ ɡāo x ìn ɡ n ǎi n ɑi 二、比一比,再组词。
(10分)
是( )父( )真( )高( )全( ) 事( )爷( )直( )亮( )合( ) 三、给加点字注音。
1、小狗的拿手本领是看.( )家。
2、我看.( )见了许多鲜花。
3、儿童节是我最高兴.
( )的一天。
4、听到这个消息,同学们兴.( )奋地叫了起来。
四、选择正确的字音在下面画“____”。
(3分)
背(b ēi b âi )书包 教(ji ào ji āo )室 着(zh áo zhe )急 胖(p àn ɡ p àn )乎乎 音乐(yu â l â) 取得(de d ěi ) 五、选择正确的汉字填在括号里。
(4分)
①今天的天( )真好,爸爸开着( )车带我去公园玩。
(气、汽) ②我把今天的( )业都( )完了。
(做、作) 六、 快乐加减。
例:很-( )+(目)=眼
说-( )+( )=脱 清-( )+( )=情 洒-( )+( )=晒 桥-( )+( )=轿 七、写出下面的反义词。
(4分)
晚——( ) 假——( ) 短——( )慢——( ) 来——( ) 矮——( ) 前——( )笑——( ) 八 、我会连。
(8分)
绿 悄悄 合 教室 胖 润润[r ùn] 收 眼睛 红 乎乎 洗 棉被
静[j ìn ɡ] 油油 扫 衣服
喜 生 摆 变 事 精 照 奇
气 动 爱 彩 情 化 妙 顾
九、说说写写。
(5分)
<1> 棉鞋里有好多阳光呢!
天上有好多________呢! ________有好多________呢!
<2> 我替爸爸拿报纸。
我给妈妈________________。
我帮老师________________。
十、给下列句子加标点。
1、棉被干嘛要晒呢()
2、奶奶穿上晒过的棉鞋很暖和()
3、今天的阳光多灿烂啊()
4、这被子真暖和()
十一、课外阅读。
(7分)
小蜻蜓
清清的小河边长满了绿油油的草,夹杂着许多不知名的野花。
这就是小蜻蜓活动的天地。
小蜻蜓,身体轻,看上去好像一架小飞机。
它们有时在花间飞舞,有时轻轻掠过水面。
这里飞飞,那里停停,小蜻蜓过者悠闲的日子
1、短文共有()节,标上小节号。
2、填量词:
一()飞机一()青草一()野花
3、在正确内容的括号里打√
①小蜻蜓活动的天地在哪里?
小河边()大树下()原野上()竹林里()
②小蜻蜓看上去像什么?
小蜜蜂()小飞机()小蚊子()小燕子()
4、为什么小蜻蜓过着悠闲的日子?请把有关的语句用“___”划出来。
十二、看图写话。
(6分)
图上画的是什么时候?谁在干什么?他们之间可能会说些什么?。