初二期末卷1
人教版英语八年级上册期末测试卷1
期末测试卷时间:100分钟满分:120分第一卷听力部分(25分)一、听力测试(每小题1分,计25分)第一节。
听下面5个句子,从题中所给的A、B、C三个选项中选出与所听内容相符的图片。
1.2.3.4.5.第二节。
听下面5个句子,从题中所给的A、B、C三个选项中选择最佳答语。
6. A. Jim will be more outgoing.B. Linda will get advice from an expert.C. I'll talk to my friends.7. A. Let's have it today.B. Half of them won't come.C. They'll be happy.8. A. Thank you. B. That's right.C. Good idea.9. A. Sitcoms, of course.B. I like to watch TV.C. I can't stand talk shows.10. A. Bill is. B. Kate does.C. Eric did.第三节。
听下面5段小对话,每段对话对应一个小题,从题后所给的A、B、C三个选项中选出能回答所提问题的最佳选项。
11. Where did Andy go on vacation?A. To India.B. To Japan.C. To China.12. How is Mike feeling now?A. Sad.B. Excited.C. Happy.13. Who is lazy?A. Ellen.B. Susan.C. Ben.14. What kind of fruit do they need?A. Apples.B. Oranges.C. Bananas.15. What should the girl wear to the party?A. A dress.B. Jeans.C. A T-shirt.第四节。
石景山区2023-2024学年第一学期初二期末试卷及答案
石景山区2023-2024学年第一学期初二期末试卷语文学校姓名准考证号考生须知1.本试卷共10页,共五部分,19道小题,满分100分。
考试时间120分钟。
2.在答题卡上准确填写学校名称、姓名和准考证号。
3.试题答案一律填涂或书写在答题卡上,选择题请用2B铅笔作答,其他试题请用黑色字迹签字笔作答,在试卷上作答无效。
4.考试结束,请将本试卷和答题卡一并交回。
一、基础·运用(共16分)为探寻中华文明发展史,学校开展了“遇见历史”主题实践活动。
班级同学参与活动宣传,准备布置主题展板。
请你完成下列任务。
1.第一组同学向大家推荐央视经典节目《国家宝藏》,并撰写了推荐词,请你参与校对。
(共6分)央视《国家宝藏.》火爆荧屏,每一期节目播出前,观众都翘.首以待。
该节目以其生动的①、厚重的②、强烈的③,直抵人心。
节目采用舞台剧加纪录片的形式,让沉默的文物“开口”讲故事。
随着重量级国宝一一亮相,古代工匠精湛的技艺令人由衷..赞叹,中华文化的博大精深令人折服,观众直呼“震撼..”。
该节目不仅让观众增强了文化自信,还见识了中华瑰宝。
(1)小组成员对语段中加点字词的读音和字形作出判断,下列说法错误..的一项是(2分)A.因为表达的是“储物之处”的意思,所以“藏”应读作zàng。
B.因为表达的是“向上仰起”的意思,所以“翘”应读作qiào。
C.因为表达的是“出于本心”的意思,所以“由衷”书写正确。
D.因为表达的是“震动摇撼”的意思,所以“震撼”书写正确。
(2)在语段中①②③处分别填入词语,全都正确的一项是(2分)A.①文物故事②文化底蕴③家国情怀B.①文物故事②家国情怀③文化底蕴C.①文化底蕴②文物故事③家国情怀D.①文化底蕴②家国情怀③文物故事(3)语段中的画线句存在问题,请加以修改。
(2分)2.第二组同学为喜爱的文物制作了卡片,准备布置到展板上,请你参与修改。
(共4分)《千里江山图》(主峰)《千里江山图》(木质长桥,原型是吴江垂虹桥)《千里江山图》是北宋画家王希孟传世的唯一作品,是“中国十大传世名画”之一【甲】打开画卷,但见重峦叠嶂....,水天一色,锦绣连绵,好一幅壮....,烟波浩渺丽的江南山水图!山水之间的渔村野市、亭台轩榭以及茅庵草舍等,都惟妙惟肖....,真是鬼斧神工....!《千里江山图》是“千年青绿山水画第一神品【乙】也是故宫博物院的镇院之宝。
贵阳市普通中学2022~2023学年度第一学期期末监测考试试卷1
贵阳市普通中学2022-2023学年度第一学期期末监测考试八年级数学试卷 班级 姓名 学号 得分一、选择题(每小题3分,共30分)1、4的平方根是( )A 、4B 、2C 、±2D 、42、如图,是我们学过的用直尺和三角板画平行线的方法示意图,这样画图的依据是( )A 、同位角相等,两直线平行B 、内错角相等,两直线平行C 、两直线平行,同位角相等D 、两直线平行,内错角相等3、已知方程组⎩⎨⎧=+=+5y 2x 4y x 2,则x+y 的值为( )A 、-1B 、0C 、2D 、34、△ABC 在平面直角坐标系中的位置如图所示,把△ABC 各点的横坐标、纵坐标都乘以-1,依次连接这些点,所得到的图形是( )5、直线y=2x 与直线y=2x+1的位置关系为( )A 、垂直B 、重合C 、平行D 、以上都有可能6、在2015年新年到来之前,某幼儿园对全体小朋友喜爱的新年礼物作调查,以决定最终买哪种礼物,下面的调查数据中最值得关注的是( )A 、方差B 、平均数C 、中位数D 、众数7、一个直角三角形的两条边分别是3和4,则第三边的平方是( )A 、25B 、7C 、25或7D 、16或258、下列四个命题中,真命题是( )A 、两条直线被第三条直线所截,内错角相等;B 、如果∠1和∠2是对顶角,那么∠1=∠2;C 、三角形的一个外角大于任何一个内角;D 、如果a ≠b,b ≠c, 那么a ≠c.9、已知一次函数y=kx+b ,y 随着x 的增大而减小,且kb <0,则在直角坐标系内y=kx+b 的大致图象是( )10、如图,每个小正方形的边长为1,将其剪开拼成一个无缝隙的大正方形,则这个大正方形的边长为( )A 、1B 、2C 、3D 、5二、填空题(每小题4分,共20分)11、写一个大于3而小于4的无理数 .(写出一个即可).12、某校在评选“优秀学生”的活动中,甲、乙两个同学在其余条件相同的情况下,甲的成绩比乙的成绩稳定,甲同学学习成绩的方差为S 2甲,乙同学学习成绩的方差为S 2乙,则S 2甲与S 2乙的大小关系为 . 13、如图,将一直角三角板放在一张两边平行的纸条上,已知∠1=30°,则∠2的度数为 .14、两条直线y=2x 和4x 32y +-=相交于点)3,23(A ,则方程组⎪⎩⎪⎨⎧+-==4x 32y x 2y 的解为 . 15、在平面直角坐标系中放置了一个边长为5的正方形如图所示,点B 在y 轴上,且坐标是(0,2),点C 在x 轴上,则点D 的坐标为 .三、解答题:16、计算:(每小题4分,共8分)83250).1(⨯ 2163)1226().2(-⨯-17、(本题满分7分)将一幅三角板拼成如图所示的图形,过点C作∠DCE的角平线CF交DE于点F。
(新)物理教科版八年级上册期末检测卷(附答案)(一)
期末检测卷(一)100分一、选择题(共10小题,每题3分,共30分,其中1~8题每题给出的四个选项中只有一个选项是正确的;9~10两小题有一个或一个以上的选项正确,全选对的得3分,选对但选不全的得1分,有错选或不选的得0分)1.以下估测最符合实际情况的是〔〕A.中学生的身高约1.6mB.正常的成年人心脏每跳动一次约1minC.泸州5月的平均气温约50℃D.成年人正常步行的速度约12m/s2.2022年5月5日,中国自主研制的新一代喷气式大型客机C919首飞成功。
在新型飞机的研制中,将飞机模型放在风中固定不动,让风(高速流动的空气)迎面吹来,可以模拟飞机在空中的飞行情况,在此情境中以下说法正确的选项是〔〕A.飞机模型相对于地面是运动的B.飞机模型相对于空气是运动的C.空气相对于地面是静止的D.空气相对于飞机模型是静止的3.如图是探究声现象的四种实验情景,以下说法正确的选项是〔〕A.甲实验说明声音的传播需要介质B.乙实验说明钢尺振动的频率越高,响度越大C.丙实验说明音叉的振幅越大,音调越高D.丁实验说明声波不能传递能量4.缺水已是一个世界性问题,因此我们要珍惜每一滴水,一些严重缺水的国家,露水也是重要的水资源,露水的形成属于物态变化中的〔〕A.熔化B.汽化C.液化D.升华5.关于平面镜成像,以下说法正确的选项是〔〕A.平面镜所成像的大小与平面镜的大小有关B.平面镜所成的像是虚像C.平面镜所成的像是由光的折射形成的D.人向平面镜靠近0.2m,像将远离平面镜0.2m6.如以下图,以以下图片中的物理现象能说明光沿直线传播的是〔〕7.在实验室中常借助“沉坠法〞测定蜡块的密度,用天平测出蜡块的质量为m,用量筒测定蜡块的体积如以下图,则蜡块的密度表达式为〔〕A.m V1B.mV2+V3C.mV3-V2D.mV3-V2-V18.射水鱼爱吃生活在水面外的小昆虫,它用射水的方法击中水面外的小昆虫,以下关于射水鱼看见水面上的昆虫的光路图正确的选项是〔〕9.用摄像头扫描二维码(如图)可快速登录网页,访问网络数据。
2010-2023历年甘肃金塔县第四中学初二上期期末考试生物卷(带解析)
2010-2023历年甘肃金塔县第四中学初二上期期末考试生物卷(带解析)第1卷一.参考题库(共25题)1.某家庭中父亲是肺结核患者,大儿子在父亲患病后即接种了卡介苗,二儿子和小儿子未接种卡介苗,结果,二儿子也患上了肺结核病,请回答:(1)二儿子患病前,家庭中的传染源是,易感者是。
(2)从预防传染病的一般措施看,对二儿子采取隔离措施属于;对他们的饮食用具进行消毒属于;禁止其亲人随便去医院探望属于。
2.依据发育关系进行连线胚珠果实子房种皮珠被种子子房壁胚受精卵果皮3.心血管疾病是由和_ 的病变引起的疾病.4.传染病的特点是_ _和__ __。
5.不能够遗传的性状都是隐性性状,能够遗传的性状都是显性性状。
6.正常人的体细胞中的染色体数目是( )A.23对B.22条C.22对D.23条7.孩子的性别是由父亲决定的。
8.动物的行为主要受____ _和___ __的调控。
9.绝大多数生物的发育起点为 __,生物的生殖方式主要有和。
10.被子植物有性生殖的重要器官是()A.根B.茎C.叶D.花11.植物的传粉方式分为__ ____和____ ___。
12.在下列基因组合中,表现出相同性状的是( )A.Cc和CCB.CC和ccC.Cc和DDD.Cc和cc13.艾滋病的三个主要传播途径是、、。
14.下列不属于人体免疫器官的是( )A.脾B.胰腺C.扁桃体D.淋巴结15.下列生物不进行变态发育的是()A.青蛙B.家蚕C.家燕D.蝗虫16.动物的社群行为是指同种个体之间的各种联系行为。
17.人的一个动作是由一块肌肉独立完成的。
18.主要的遗体物质是指( )A.染色体B.RNAC.蛋白质D.DNA19.禁止酒后驾车的原因是过量的酒精会抑制人的()A.神经系统B.消化系统C.呼吸系统D.循环系统20.下列疾病中,不属于传染病的是( )A.SARSB.乙型肝炎C.狂犬病D.心肌炎21.动物的行为分为和两种22.下列叙述中,哪个是正确的( )A.青少年正处在生长发育的关键时期,不能喝酒和抽烟.B.吸烟主是危害自己,对他人无害C.长期吸烟的人如果不抽会影响到健康.D.青少偶尔抽一两支香烟没关系23.脊椎动物的运动系统是由、、三部分构成。
2010-2023历年福建仙游县初二上期期末联考生物卷(带解析)
2010-2023历年福建仙游县初二上期期末联考生物卷(带解析)第1卷一.参考题库(共25题)1.构成植物叶片的下列细胞中,能进行光合作用的有()①叶肉细胞②保卫细胞③无色素的叶表皮细胞A.①B.①②C.①②④D.①②③2.如图是表示的一种简易的实物保存方法,对此方法的叙述不合理的是()A.加清水只要是为了阻止空气中微生物的进入B.对食物加热后再保存的目的是杀死食物中原有的微生物C.此方法可以有效减少微生物进入食品的机会D.该保存方法和冰箱贮存食物的原理相同3.下列叙述不属于病毒的主要特征的是()A.由蛋白质和核酸分子构成B.个体极其微小C.分裂速度很快D.专门寄生在活细胞内4.下图为显微镜下菠菜叶横切面结构示意图,请据图回答下列问题:(1)图中的【】和【】合称表皮,属于组织。
(2)叶能够进行光合作用,光合作用的场所是,该结构主要集中在叶片的【】部位的组织细胞内。
(3)光合作用合成的有机物通过中的运输到植物体的各个部位。
(4)蒸腾作用所散失的水分是通过形成的来完成的。
(5)根据叶片的结构和功能特点,可以判定叶所属的结构层次是。
5.植物进行呼吸作用的实质是()A.合成有机物,释放能量B.合成有机物,储存能量C.分解有机物,储存能量D.分解有机物,释放能量6.根瘤菌与豆科植物生活在一起,互相依赖,彼此有利。
它们之间的关系()A.互生B.共生C.寄生D.腐生7.(6分)图为菜豆种子萌发的过程,请据图回答:(1)处于①②阶段时,萌发所需的营养物质由种子的____提供,萌发所需的能量通过________作用提供。
(2)处于⑤阶段时,体内有机物合成必需的原料是________和_______(3)对⑤进行移栽时,根部保留一坨泥土,目的是不要让________受到损伤.请另举一例在生产实践中提高移栽成活率的措施。
8.连线题①金龟子遇敌假死 a.繁殖行为②雌鸟衔虫喂养雏鸟 b.防御行为③天鹅的按时迁徙 c.社群行为④饿狗为食物而争斗 d.攻击行为⑤蚂蚁间的分工合作 e.节律行为9.“穿花蛱蝶深深见,点水蜻蜓款款飞”的诗句分别是描述了这两类昆虫的()A.觅食行为繁殖行为B.攻击行为觅食行为C.迁徙行为繁殖行为D.觅食行为防御行为10.病毒是一类没有________结构的特殊生物,它们的结构基本相似,一般由__ ______外壳和内部的________组成。
《初二上学期期末试卷》(期末试卷)2(苏科版初二上)初中数学(1)
《初二上学期期末试卷》(期末试卷)2(苏科版初二上)doc 初中数学八年级数学试题题号一二三四五总分1-1011-20 21-25 26 27 28 29 30 31 得分第一部分〔选择题,共 30 分〕本卷须知:答卷前将密封线内的项目填写清晰一、选择题:〔本大题共10小题,每题3分,共30分.在每题给出的4个选项中,只有1项是符合题目要求的,请正确答案的序号填写在下面的括号内〕.1.以下函数中,一次函数是A.x2y B.y=5x 2 C.y=1+5x D.y=x 2+x(x-1)2.假设x<-3,那么A .-2x>6B .2x>-6C .-2x<6D .2x<63.在坐标平面内有一点P(a ,b),且a 与b 的乘积为零,那么P 的位置一定在 A.原点 B.x 轴上 C.y 轴上 D.坐标轴上4.四边形ABCD 的对角线相交于O ,且OA=OB=OC=OD ,那么那个四边形 A.仅是轴对称图形 B.仅是中心对称图形C.即是轴对称图形又是中心对称图形 D.即不是轴对称图形,又不是中心对称图形 5.8的平方根是 A.22B.-22C.±22D.不存在6.在学校对学生进行的体温测量中,学生甲连续10天的体温与36℃的上下波动数据为0.2,0.3,0.1,0.1,0,0.2,0.1,0,0.1,0.1,那么在这10天中该学生的体温波动数据中不正确的选项......是.A.平均数为0.12 B.众数为0.1 C.中位数为0.1 D.平均数为0.027.五根小木棒,其长度分不为7、15、20、24、25,现想把它们摆成两个直角三角形,以下图中题号 1 2 3 4 5 6 7 8 9 10答案2024正确的选项是8a =,那么以下结论正确的选项是A.4.5 5.0a << B.5.0 5.5a <<C.5.5 6.0a << D.6.0 6.5a <<9.如图,点阵中以相邻4个点为顶点的小正方形的面积为1, 那么△ABC 的面积为 A .3 B .3.5 C .4 D .4.510.一列火车从盐城站动身,加速行驶一段时刻后开始匀速行驶,过了一段时刻,火车到达下一个车站.乘客上、下车后,火车又加速,一段时刻后再次开始匀速行驶.下面哪幅图能够近似地刻画出火车在这段时刻内的速度变化情形.第二部分〔非选择题,共 120 分〕本卷须知:第二部分试题答案用钢笔或圆珠笔直截了当写在试卷上。
河南省洛阳市2021-2022学年八年级上学期期末英语试题(原卷版)(1)
__________________does David go to see his grandparents?
2.The Greenswent to the mountainslast Sunday.(对划线部分提问)
20. A. motherB. friendC. classmateD. passenger
四、阅读理解(20小题,每小题2分,共40分)
阅读下而语言材料,根据材料内容选择最佳答案,并在答题卡上将该项涂黑。
A
Nelly
Last summer I went to Luoyang with my parents. We went to the Longmen Grottoes, White Horse Temple, Li Jingmen and Wangcheng Park. There were so many people in all these places when we got there, Along theway, we saw many special buildings and ate many kinds of food. The food was delicious but not very expensive.
4.Who runs fastest in the class?
A. Kate.B. Sarah.C. Linda.
5.How many minutes was the boy late for class?
A. Ten.B. Twenty.C. Forty.
第二节听下面几段对话或独白。每段对话或独白后有几个小题,从题中所给的A、B、C三个选项中选出最佳答案,并在答题卡上将该项涂黑。每段对话或独白读两遍。
苏科版八年级下册数学期末试卷 (1)
苏科版八年级下册数学期末试卷一、选择题(本大题共10小题,每小题3分,共30分.)1.(3分)使二次根式的有意义的x的取值范围是( )A.x>0B.x>1C.x≥1D.x≠12.(3分)下列图形中,是中心对称图形但不是轴对称图形的为( )A.等边三角形B.平行四边形C.矩形D.圆3.(3分)下列事件中的必然事件是( )A.一箭双雕B.守株待兔C.水中捞月D.旭日东升4.(3分)下列分式中属于最简分式的是( )A.B.C.D.5.(3分)如图,已知四边形ABCD是平行四边形,对角线AC、BD交于点O,则下列结论中错误的是( )A.当AB=BC时,它是菱形B.当∠ABC=90°时,它是正方形C.当AC=BD时,它是矩形D.当AC⊥BD时,它是菱形6.(3分)在“生命安全”主题教育活动中,为了解甲、乙、丙、丁四所学校学生对生命安全知识掌握情况,小丽制定了如下方案,你认为最合理的是( )A.抽取乙校初二年级学生进行调查B.在丙校随机抽取600名学生进行调查C.随机抽取150名老师进行调查D.在四个学校各随机抽取150名学生进行调查7.(3分)在Rt△ABC中,∠C=90°,∠A=30°,BC=4,D、E分别为AC、AB边上的中点,连接DE并延长DE到F,使得EF=2ED,连接BF,则BF长为( )A.2B.2C.4D.48.(3分)已知一次函数y=kx+b的图象经过一、二、四象限,则下列关于反比例函数y=的描述,其中正确的是( )A.图象在一、三象限B.y随x的增大而减小C.y随x的增大而增大D.当x<0时,y>09.(3分)已知:a2+b2=3ab(a>b>0),则的值为( )A.B.3C.D.510.(3分)如图,在平面直角坐标系中,矩形ABCD的对角线AC的中点与坐标原点重合,点E是x轴上一点,连接AE、BE,若AD平分∠OAE,反比例函数y=(k<0,x<0)的图象经过AE上的点A、F,且AF=EF,△ABE的面积为18,则k的值为( )A.﹣6B.﹣12C.﹣18D.﹣24二、填空题(本大题共8小题,每小题2分,共16分.)11.(2分)给出下列3个分式:,,,它们的最简公分母为.12.(2分)当x= 时,分式的值为零.13.(2分)一枚质地均匀的骰子的六个面上分别刻有1~6的点数,抛掷这枚骰子,若抛到偶数的概率记作P1,抛到奇数的概率记作P2,则P1与P2的大小关系是.14.(2分)已知实数a、b满足+|6﹣b|=0,则的值为.15.如图,面积为3的矩形OABC的一个顶点B在反比例函数y=的图象上,另三点在坐标轴上,则k= .16.(2分)如图,菱形ABCD的对角线AC,BD相交于点O,过点D作DH⊥BC于点H,连接OH,若OA=8,OH=6,则菱形ABCD的面积为.17.(2分)已知正比例函数y1=k1x(k1≠0)与反比例函数y2=(k2≠0)的图象有一个交点的坐标为(3,﹣1),则关于x的不等式k1x﹣>0的解集为.18.(2分)如图,E为正方形ABCD中BC边上的一点,且AB=3BE=6,M、N分别为边CD、AB上的动点,且始终保持MN⊥AE,则AM+NE的最小值为.三、解答题(本大题共9小题,共74分.)19.(8分)计算:(1)+|3﹣|﹣()2;(2)﹣(3+)(3﹣).20.(8分)(1)计算:;(2)解方程:.21.(6分)化简代数式÷(x+),并求当x=7时此代数式的值.22.(8分)某校想了解学生每周的课外阅读时间情况,随机调查了部分学生,对学生每周的课外阅读时间x(单位:小时)进行分组整理,并绘制了如图所示的不完整的频数分布直方图和扇形统计图:根据图中提供的信息,解答下列问题:(1)m= ,E组对应的圆心角度数为°;(2)补全频数分布直方图;(3)请估计该校3000名学生中每周的课外阅读时间不小于6小时的人数.23.(8分)如图,在▱ABCD中,延长BC到点E,使得BC=CE,连接AE、DE.(1)求证:四边形ACED是平行四边形;(2)如果AB=AE=4,BE=2,求四边形ACED的面积.24.(8分)某文具店王老板用240元购进一批笔记本,很快售完;王老板又用600元购进第二批笔记本,所购本数是第一批的2倍,但进价比第一批每本多了2元.(1)第一批笔记本每本进价多少元?(2)王老板以每本12元的价格销售第二批笔记本,售出60%后,为了尽快售完,决定打折促销,要使第二批笔记本的销售总利润不少于48元,剩余的笔记本每本售价最低打几折?25.(8分)如图1,在矩形ABCD中,AB=6,BC=10,P是AD边上一点,将△ABP沿着直线PB折叠,得到△EBP.(1)请在图2上用没有刻度的直尺和圆规,在AD边上作出一点P,使P、E、C三点在一直线上(不写作法,保留作图痕迹),此时AP的长为;(2)请在图3上用没有刻度的直尺和圆规,在AD边上作出一点P,使BE平分∠PBC (不写作法,保留作图痕迹),此时△BEC的面积为.26.(10分)如图,在平面直角坐标系中,B、C两点在x轴的正半轴上,以线段BC为边向上作正方形ABCD,顶点A在正比例函数y=2x的图象上,反比例函数y=(x>0,k >0)的图象经过点A,且与边CD相交于点E.(1)若BC=4,求点E的坐标;(2)连接AE,OE.①若△AOE的面积为24,求k的值;②是否存在某一位置使得AE⊥OA,若存在,求出k的值;若不存在,请说明理由.27.(10分)如图,在平面直角坐标系中,矩形ABCO的边OC、OA分别在x轴、y轴上,已知B(m,4)(m>0),AB上有一点P(n,4),将△OAP绕着点O顺时针旋转60°得到△OA1P1.(1)点A1的坐标为;连接PP1,若PP1⊥x轴,则n的值为;(2)如果m﹣n=2.①当点P1落在OC上时,求CP1的长;②请直接写出CP1最小值.参考答案与试题解析一、选择题(本大题共10小题,每小题3分,共30分.)1.【分析】根据中a≥0得出不等式,求出不等式的解即可.【解答】解:要使有意义,必须x﹣1≥0,解得:x≥1.故选:C.2.【分析】根据轴对称图形和中心对称图形的概念,对各选项分析判断即可得解.把一个图形绕某一点旋转180°,如果旋转后的图形能够与原来的图形重合,那么这个图形就叫做中心对称图形;如果一个图形沿一条直线折叠,直线两旁的部分能够互相重合,这个图形叫做轴对称图形.【解答】解:A.等边三角形是轴对称图形,不是中心对称图形,故本选项不符合题意;B.平行四边形是中心对称图形但不是轴对称图形,故本选项符合题意;C.矩形既是轴对称图形,又是中心对称图形,故本选项不符合题意;D.圆既是轴对称图形,又是中心对称图形,故本选项不符合题意.故选:B.3.【分析】根据必然事件的定义即可判断.【解答】解:A、一箭双雕,是随机事件,不符合题意;B、守株待兔,是随机事件,不符合题意;C、水中捞月,是不可能事件,不符合题意;D、旭日东升,是必然事件,故选项符合题意;故选:D.4.【分析】最简分式的标准是分子,分母中不含有公因式,不能再约分.判断的方法是把分子、分母分解因式,并且观察有无互为相反数的因式,这样的因式可以通过符号变化化为相同的因式从而进行约分.【解答】解:A、是最简分式,故本选项符合题意;B、原式=﹣,不是最简分式,故本选项不符合题意;C、原式=,不是最简分式,故本选项不符合题意;D、原式=x﹣3,该式子不是最简分式,故本选项不符合题意;故选:A.5.【分析】利用矩形的判定、正方形的判定及菱形的判定方法分别判断后即可确定正确的选项.【解答】解:A、根据邻边相等的平行四边形是菱形可以得到该结论正确;B、当∠ABC=90°时,可以得到平行四边形ABCD是矩形,不能得到正方形,故错误,C、根据对角线相等的平行四边形是矩形可以判断该选项正确;D、根据对角线互相垂直的平行四边形是菱形可以得到该选项正确;故选:B.6.【分析】根据抽样调查的具体性和代表性解答即可.【解答】解:为了解甲、乙、丙、丁四所学校学生对生命安全知识掌握情况,在四个学校各随机抽取150名学生进行调查最具有具体性和代表性,故选:D.7.【分析】根据直角三角形的性质求出AB,进而求出AE、EB,根据三角形中位线定理得到DE∥BC,得到∠AED=∠AED=60°,根据等边三角形的判定定理和性质定理解答即可.【解答】解:在Rt△ABC中,∠C=90°,∠A=30°,BC=4,∴AB=2BC=8,∠ABC=60°,∵E为AB边上的中点,∴AE=EB=4,∵D、E分别为AC、AB边上的中点,∴DE∥BC,∴∠AED=∠AED=60°,∴∠BEF=∠ABC=60°,在Rt△AED中,∠A=30°,∴AE=2DE,∵EF=2DE,∴AE=EF,∴△BEF为等边三角形,∴BF=BE=4,故选:C.8.【分析】根据一次函数y=kx+b的图象经过一、二、四象限,可以得到k<0,b>0,从而可以得到b﹣k>0,然后根据反比例函数的性质,即可判断各个选项中的结论是否正确,从而可以解答本题.【解答】解:∵一次函数y=kx+b的图象经过一、二、四象限,∴k<0,b>0,∴b﹣k>0,∴反比例函数y=的图象在第一、三象限,故选项A正确;在每个象限内,y随x的增大而增大,故选项B错误、选项C错误;当x<0时,反比例函数y=的函数值y<0,故选项D错误;故选:A.9.【分析】首先进行配方,得出a+b以及a﹣b的值,进而求出答案.【解答】解:∵a>b>0,a2+b2=3ab,∴(a﹣b)2=ab,(a+b)2=5ab,∴a+b>0,a﹣b>0,∴的值为:.故选:A.10.【分析】连接BD,先由AD平分∠EAO得∠DAE=∠OAD,由矩形ABCD的性质得到∠OAD=∠ODA,从而得到∠EAD=∠ADO,故而AE∥BD,再由平行线的性质得到△ABE和△AOE的面积相等,然后设点A的坐标,结合AF=EF得到点F和点E的坐标,最后结合△AOE的面积求出k的取值.【解答】解:连接BD,则OA=OD,∴∠OAD=∠ADO,∵AD平分∠EAO,∴∠EAD=∠OAD,∴∠EAD=∠ADO,∴AE∥BD,∴S△AEB=S△AEO=18,设A(a,),∵AF=EF,∴F(2a,),E(3a,0),∴S△AEO=×(﹣3a)×=18,∴k=﹣12,故选:B.二、填空题(本大题共8小题,每小题2分,共16分.)11.【分析】确定最简公分母的方法是:(1)取各分母系数的最小公倍数;(2)凡单独出现的字母连同它的指数作为最简公分母的一个因式;(3)同底数幂取次数最高的,得到的因式的积就是最简公分母.【解答】解:分式,,的分母分别是ab、a3b,abc,故最简公分母是a2bc;故答案为a2bc.12.【分析】分式的值为0的条件是:(1)分子=0;(2)分母≠0.两个条件需同时具备,缺一不可.据此可以解答本题.【解答】解:由题意可得x﹣2=0且x+2≠0,解得x=2.故当x=2时,分式的值为零.故答案为:2.13.【分析】直接利用概率公式求出P1,P2的值,进而得出答案.【解答】解:抛到偶数的概率P1==,抛到奇数的概率P2==,则P1=P2.故答案为:P1=P2.14.【分析】先根据非负数的和为0求出a、b的值,再代入化简.【解答】解:∵+|6﹣b|=0,又∵≥0,|6﹣b|≥0,∴a﹣3=0,6﹣b=0.∴a=3,b=6.∴==2.故答案为:15.【分析】因为过双曲线上任意一点引x轴、y轴垂线,所得矩形面积S是个定值,即S =|k|.【解答】解:根据题意,知S=|k|=3,k=±3,又因为反比例函数位于第四象限,k<0,所以k=﹣3,16.【分析】由菱形的性质得OA=OC=8,OB=OD,AC⊥BD,则AC=16,再由直角三角形斜边上的中线性质求出BD的长度,然后由菱形的面积公式求解即可.【解答】解:∵四边形ABCD是菱形,∴OA=OC=8,OB=OD,AC⊥BD,∴AC=2OA=16,∵DH⊥AB,∴∠BHD=90°,∴BD=2OH=2×6=12,∴菱形ABCD的面积=AC•BD=×16×12=96,故答案为:96.17.【分析】利用反比例函数和正比例函数的性质判断两个交点关于原点对称,然后根据关于原点对称的点的坐标特征写出另一个交点的坐标.根据交点坐标和图象即可得出不等式的解集.【解答】解:∵正比例函数y1=k1x(k1≠0)与反比例函数y2=(k2≠0)的图象关于原点对称,∴正比例函数y1=k1x(k1≠0)与反比例函数y2=(k2≠0)的图象的交点关于原点对称,∵一个交点的坐标为(3,﹣1),∴另一个交点的坐标是(﹣3,1),如图,则关于x的不等式k1x﹣>0的解集为x<﹣3或0<x<3,故答案为:x<﹣3或0<x<3.18.【分析】由勾股定理可求AE的长,由“ASA”可证△ABE≌△DAH,可得DH=AE=2,通过证明四边形NEGM是平行四边形,可得NE=MG,MN=EG=AE=2,由AM+NE =AM+MG,则当点A,点M,点G三点共线时,即AM+NE的最小值为AG,由勾股定理可求解.【解答】解:如图,过点D作DH∥MN,交AB于H,过点E作EG∥MN,过点M作MG∥NE,两直线交于点G,连接AG,∵四边形ABCD是正方形,∴AB∥CD,∠B=∠BAD=90°,∵AB=3BE=6,∴BE=2,∴AE===2,∵DH∥MN,AB∥CD,∴四边形DHNM是平行四边形,∴DH=MN,∵MN⊥AE,DH∥MN,EG∥MN,∴DH⊥AE,AE⊥EG,∴∠BAE+∠AHD=90°=∠AHD+∠ADH,∠AEG=90°,∴∠BAE=∠ADH,在△ABE和△DAH中,,∴△ABE≌△DAH(ASA),∴DH=AE=2,∴MN=DH=AE=2,∵EG∥MN,MG∥NE,∴四边形NEGM是平行四边形,∴NE=MG,MN=EG=AE=2,∴AM+NE=AM+MG,则当点A,点M,点G三点共线时,AM+NE的最小值为AG,∴AG===4,故答案为4.三、解答题(本大题共9小题,共74分.)19.【分析】(1)直接利用二次根式的性质以及绝对值的性质分别化简,进而合并得出答案;(2)直接分母有理化以及结合乘法公式计算得出答案.【解答】解:(1)原式=3+3﹣2﹣3=;(2)原式=﹣(9﹣6)=4+4+3﹣3=4+4.20.【分析】(1)先因式分解,再通分,最后同分母相加,结果化为最简分式;(2)先因式分解,再去分母、去括号、移项、合并同类项、把x系数化为一,最后一定检验.【解答】解:(1)原式=+===;(2)x(x+2)﹣(x+2)(x﹣2)=8,x2+2x﹣x2+4=8,2x=8﹣4,x=2,经检验x=2为原方程的增根,∴原方程无解.21.【分析】根据分式的加法和除法可以化简题目中的式子,然后将x的值代入化简后的式子即可.【解答】解:÷(x+)=÷==,当x=7时,原式==.22.【分析】(1)根据A组的频数和所占的百分比,可以求得本次调查的人数,然后即可计算出m的值,以及E组对应的圆心角度数;(2)根据D组所占的百分比和(1)中的结果,可以计算出D组的频数,从而可以将频数分布直方图补充完整;(3)根据直方图中的数据,可以计算出该校3000名学生中每周的课外阅读时间不小于6小时的人数.【解答】解:(1)本次调查的人数为:10÷10%=100,m%=40÷100×100%=40%,∴m=40,E组对应的圆心角度数为:×360°=14.4°,故答案为:40,14.4;(2)D组的频数为:100×25%=25,补全的频数分布直方图如右图所示;(3)3000×=870(人),答:估计该校3000名学生中每周的课外阅读时间不小于6小时的有870人.23.【分析】(1)由平行四边形的性质得AD∥BC,AD=BC,再证AD=CE,即可得出结论;(2)由等腰三角形的性质得∠ACE=90°,则平行四边形ACED是矩形,再由勾股定理得AC=,即可求解.【解答】(1)证明:∵四边形ABCD是平行四边形,∴AD∥BC,AD=BC,∵BC=CE,∴AD=CE,∵AD∥CE,∴四边形ACED是平行四边形;(2)解:由(1)得:四边形ACED是平行四边形,∵AB=AE,BC=CE=BE=,∴AC⊥BE,∴∠ACE=90°,∴平行四边形ACED是矩形,在Rt△ACE中,由勾股定理得:AC===,∴矩形ACED的面积=AC×CE=×=.24.【分析】(1)设第一批笔记本每本进价为x元,则第二批每本进价为(x+2)元,由题意:某文具店王老板用240元购进一批笔记本,很快售完;王老板又用600元购进第二批笔记本,所购本数是第一批的2倍,列出分式方程,解方程即可;(2)设剩余的笔记本每本打y折,由题意:王老板以每本12元的价格销售第二批笔记本,售出60%后,为了尽快售完,决定打折促销,要使第二批笔记本的销售总利润不少于48元,列出一元一次不等式,解不等式即可.【解答】解:(1)设第一批笔记本每本进价为x元,则第二批每本进价为(x+2)元,由题意得:,解之得:x=8,经检验,x=8为原方程的解,答:第一批笔记本每本进价为8元.(2)第二批笔记本有:=60(本),设剩余的笔记本每本打y折,由题意得:,解得:y≥7.5,答:剩余的笔记本每本最低打七五折.25.【分析】(1)以C为圆心,BC长为半径作弧交AD于点P,则∠CBP=∠CPB,而∠CBP =∠APB,所以AP=2(2)以为AB边再矩形内作等边三角形ABE,作∠ABE的角平分线BP与AD交于点P,则BE平分∠PBC,作EH⊥BC,然后求出BE,从而得到△BEC的面积.【解答】解:(1)如图2,点P为所作;∵CP=CB=10,∴PD===8,∴AP=AD﹣DP=10﹣8=2;故答案为2;(2)如图3,点P为所作,过E作EH⊥BC于H,∵△ABE为等边三角形,∴∠ABE=60°,BE=BA=6,∴∠EBC=30°,∴EH=BE=3,∴S△BEC=×10×3=15.故答案为15.26.【分析】(1)根据正方形的性质得到AB=BC=4,求得A(2,4),得到k=2×4=8,于是求得点E的坐标为;(2)①设A(a,2a)(a>0),则点,根据梯形的面积公式即可得到答案;②根据余角的性质得到∠OAB=∠BAE,根据全等三角形的性质得到OB=DE,由①可知,A(a,2a)(a>0),则点,求得OB=a,,推出k=0,于是得到答案.【解答】解:(1)在正方形ABCD中,AB=BC=4,∴A(2,4),∵A(2,4)在的图象上,∴k=2×4=8,∵OC=OB+BC=6,∴x E=6,将x E=6代入中,得:,∴点E的坐标为;(2)①设A(a,2a)(a>0),则点,∵S梯形ABCE=S△AOE=24,∴得a2=9,∴k=2a2=18;②答:不存在,理由:∵AE⊥OA,∴∠OAB+∠BAE=90°,∵∠BAD=∠BAE+∠DAE=90°,∴∠OAB=∠DAE,∵∠ABO=∠D=90°,AB=AD,∴△OAB≌△EAD(ASA),∴OB=DE,由①可知,A(a,2a)(a>0),则点,∴OB=a,,∴,∴a=0,∴k=0,∵k>0,∴不符合题意,不存在.27.【分析】(1)连接AA1,过A1作A1D⊥x轴于D,设PP1与x轴交于E,根据将△OAP 绕着点O顺时针旋转60°得到△OA1P1,B(m,4),可得∠AOA1=∠POP1=60°,OA=OA1=4,OP=OP1,即得A1D=OA1=2,OD==2,故A1(2,2),由PP1⊥x轴,可得∠POE=30°,在Rt△POE中,即得OP=8,OE=4,故n =4;(2)①连接PP1,过P作PF⊥x轴于F,由△POP1是等边三角形,PF⊥x轴,知P1F=OP1=PP1,而PF=4,即得P1F=,根据m﹣n=2,即BP=2=CF,即得CP1=CF﹣P1F=;②过A1作A1R⊥OA于R,过P1作P1S⊥A1R于S,由m﹣n=2,得m=2+n,C(2+n,0),证明△A1RO∽△P1A1S,可得OR:A1R:OA1=A1S:P1S:A1P1=1::2,OR=2,A1R=2,从而有P1(2+n,2﹣n),即得CP12=(n﹣)2+1,故CP12最小为1,CP1最小值是1.【解答】解:(1)连接AA1,过A1作A1D⊥x轴于D,设PP1与x轴交于E,如图:∵将△OAP绕着点O顺时针旋转60°得到△OA1P1,B(m,4),∴∠AOA1=∠POP1=60°,OA=OA1=4,OP=OP1,∴∠A1OD=30°,△POP1是等边三角形,∴A1D=OA1=2,OD==2,∴A1(2,2),∵△POP1是等边三角形,∴∠OPP1=60°,∵PP1⊥x轴,∴∠OEP=90°,∴∠POE=30°,在Rt△POE中,PE=OA=4,∴OP=8,OE==4,∴P(4,4),即n=4,故答案为:(2,2),;(2)①连接PP1,过P作PF⊥x轴于F,如图:∵△POP1是等边三角形,PF⊥x轴,∴P1F=OP1=PP1,∵PF=4,∴P1F==,∵m﹣n=2,即BP=2=CF,∴CP1=CF﹣P1F=;②过A1作A1R⊥OA于R,过P1作P1S⊥A1R于S,如图:∵m﹣n=2,∴m=2+n,∴C(2+n,0),∵∠OA1P1=∠OAP=90°,∴∠RA1O=90°﹣∠SA1P1=∠A1P1S,又∠A1RO=∠A1SP1,∴△A1RO∽△P1A1S,∵∠AOA1=60°,OA=OA1=4,∴OR:A1R:OA1=A1S:P1S:A1P1=1::2,OR=2,A1R=2,∵P(n,4),∴A1P1=AP=n,∴A1S=n,P1S=n,∴P1(2+n,2﹣n),∴CP12=(2+n﹣2﹣n)2+(2﹣n﹣0)2=n2﹣2n+4=(n﹣)2+1,∴n=时,CP12最小为1,∴当P1(,),C(3,0)时,CP1取最小值,最小值是1.。
仁爱版八年级下册英语期末试卷 (1)
仁爱版八年级下册英语期末试卷二、阅读理解(20 小题,每小题10分,满分40分)阅读下面四篇语言材料,然后按要求做题。
注意:请把答案填涂在答题卷相应位置。
1.(10分)Gina is a young girl.She graduated from the university three years ago,but she still lived with her parents these st week,she moved out of her parents 'place.She was excited and afraid.Now her parents can 't watch her all the time and she can do things freely.At the same time,she met a problem.She lived with her parents for more than 18 years.Her parents used to cook for her,so she never learned to cook before.At first,she went out to eat a lot,but it was too expensive and she didn't make much money.Now she has to cook by herself,because it' s a cheap way when she spends some time studying how to cook .She planned to make fried cabbage.It is healthy and easy to make.First,she put a pan on the stove and turned on the stove.Then she put some oil on the pan.When the oil was hot,she put the cabbage into the pan.After stirring the cabbage around quickly,she Covered the pan with a lid and waited.About four or five minutes later,it was ready.She tried it and found it very delicious.She was so proud of herself that she decided to make tomato soup next time.(1)How long might Gina live with her parents?A.For about three years.B.For about eight yearsC.For over eighteen years.(2)Why was Gina afraid when she moved out of her parents' place?A.Because she didn't have a job.B.Because she didn't have money.C.Because she couldn't cook by herself.(3)What does the underlined word "stirring" mean in Chinese?A.烘干.B.搅拌.C.腌制.(4)What does the second paragraph mainly talk about?A.How Gina cooked the fried cabbage.B.Why Gina cooked the fried cabbage.C.How Gina cooked the tomato soup.(5)What's the best title of the passage ?A.Gina's first job experience.B.Gina's first cooking experience.C.Gina's healthy living habits.2.(10分)I was lying in bed yesterday afternoon after a big lunch.There wasn't anything interesting on television.The book I was trying to read seemed boring,too.Finally I put the book down,closed my eyes,and let myself take a nap.Suddenly,I felt a little and wet tongue lick my face.My eyes opened and I saw our dog Luck standing there and looking at me.I smiled and touched her head.After a while,I got up and we went outside.The sun was breaking through the clouds and warmed the cool air.I laughed as I ran with her around the yard.She smiled the grass when the wind blew lightly.After we went back inside,I threw a ball to her,and she brought it back to me happily.Then she jumped up on my bed and took a nap of her own.It seemed like even while she was resting,she never found life boring.Luck's life is always full of happiness.In her life,there is time to nap and time to play.There is time to sing,to listen to the news,and to dance.There is time to smell the flowers when the wind blows lightly,but there is no time to be bored.After thinking about Luck's life,I know we only get a certain amount of time to live and that we shouldn't waste a second of it.Word Banknap 小睡tongue 舌头lick 舔second 秒(1)Why did the writer take a nap?A.Because he had a habit of having a nap.B.Because he felt tired after lunch.C.Because he found nothing interesting to do.(2)What happened when the writer went outside?A.His dog jumped up on his bed.B.The weather became better.C.His dog licked his face.(3)How did the writer feel after walking his dog ?A.Disappointed.B.Happy.C.Tired.(4)What did the writer do with his dog according to third paragraph?A.They smelled the flowers.B.They lay on the grass.C.They played a game.(5)What can we infer from this passage?A.The writer learned a lot from his dog.B.There is something wrong with Luck's tongue.C.Luck doesn't like playing with a ball at all.3.(10分)Do you want to be slimmer?Here are some fashion tricks.They can help you feel thinner.Don't wear pants if they have lines from left to right.The lines make you look fatter especially when you have a heavy build.Wear dark colors.Black is many people 's favorite color because dressing in dark colors can make you look slimmer.There are different dark colors.You have many other choices besides black.Dark blue seems good and navy is not bad,either.Choose a shirt.Make sure there is more than one color in the shirt.Only one color,especially light color,may make you look much fatter.Remember,two or three colors are enough.Don't believe the size on the tag.Sizes sometimes are different in different stores.So make sure you try on different sizes to get the best one.Don't wear something if it is too small for you,because it can make you look a lot bigger than you are.Usually jeans are boys and girls 'favorite.Be careful of back pockets.some pockets can make your bum look bigger,but others can make it slimmer.When you are shopping,choose jeans with right pockets.Everyone wants to be young,beautiful and slim,so choose the right style to make you look best.Word Bankbuild 身材navy 藏青色tag 标签bum 屁股(1)If you are fat,.A.don't wear pants if they have linesB.don't wear pants if they have lines from up to downC.don't wear pants if they have lines from left to right(2)What kind of shirt can make you look thinner?A.There is more than one color in the shirt.B.There is more than three colors in the shirt.C.There is more than one color in the shirt and two or three colors are enough.(3)When you choose your jeans,you should .A.choose the jeans with right pockets.B.choose some jeans without pockets.C.choose some jeans with two pockets.(4)The writer mentioned kinds of fashion tricks.A.fourB.fiveC.six(5)In the passage,we know that .A.few people believe the size on the tagB.size is the same in all shopsC.lots of people choose their dress by the size on the tag4.(10分)Customs on EatingFood in China and western countries is different.China has about five thousand years' history.Chinese people may spend half of their time on food.They choose food very carefully.They only use fresh materials to make food.For example,they only eat fresh fish.Chinese people have a lot of ideas for cooking.They can cook a chicken in over twenty ways.(1).Western countries,like England or America,don't have fresh food because they buy their food from supermarkets.They only sell stored materials. (2)They are unhealthy for people' s body.Western people are very good at making desserts and chocolates.They can make very good cakes and chocolates.(3)In China,when people invite others for a meal,they would pay for the meal,but it' s not the same way in western counties.(4)They won't be happy if you pay for them.Another difference in eating is that:(5)Chinese people only have three meals in a day.But western people may have more.They usually have afternoon tea when they would have fruit or cakes with cheese.根据短文内容,从下面五个选项中选出能填入文中空缺处的最佳选项,使短文意思通顺、内容完整。
人教八年级下册英语期末测试卷(一)(含听力+答案)
人教八年级下册英语期末测试卷〔一〕时间:120分钟总分值:120分听力局部〔分〕I.听句子,选择正确的答语.听一遍.(5分)( )1. A. Yes, I would. B. No, I don't. C. OK,I'll do it at once.( )2. A. I was using the Internet. B. Yes, I was. C. I used the Internet.( )3. A. Yes, I've been there twice. B. Yes, I'm going. C. Yes, I did.( )4. A. He's gone to the library. B. He will go to the library.C. He's been to the library.( )5. A. Yes, please. B. You are so kind. C. No I can't. II.听对话及问题,选择正确的答案.听两遍. (5分) ( )6. A. Eric's mother. B. Eric's father. C. Eric. ( )7.A.At 9:30 a.m. B.At 10:30 a.m. C.At 11:00 a.m. ( )8.A. She has a sore back. B. She has a headache.C. She has a sore throat.( )9. A. Does the dishes. B. Sweeps the floor. C. Takes out the rubbish.( )10. A.Sarah B.Ben. C. Tina.田.听两段对话,选择正确的答案.听两遍.(5分) 听第一段对话,答复第11〜12小题.)11. Where have the twins been?A. To Paris.B.To Sydney.C. To New York. ( )12. How long have the twins been there?A. For a week.B. For a month.C. For two months.听第二段对话,答复第13〜15小题.( )13. Thomas is for vacation.A. going to visit the Great WallB. going to do chores at homeC. going bike riding( )14. Rose has to stay at home for a few days because .A. her parents both workB. her parents have no moneyC. she is tired( )15. Rose is going to Beijing with .A. her friendsB. her cousinsC. her parentsIV.听短文,选择正确的答案.听两遍.(10分)( )16. The man wanted to take a little rest because .A. he was hungryB. it was very hotC. it was cool in the forest( )17. The man shouted at the monkeys, but the little monkeys could nA.seeB.hearC. understand( )18. After the man threw his hat onto the ground, all the monkeys _____ .ughed and made facesB. jumped off the treeC. threw their hats down( )19. In the end the man picked up all his hats and .A. went homeB. went to townC. went to the forest( )20. This interesting story tells us about .A. monkeys and a man with hatsB. how to teach monkeys to wear hatsC. a man and his monkey笔试局部(95分) D. 单项选择.(15分)A. Have a good timeB. You are unluckyC. I want to go, tooD. I'm sorry to hear that( )26. -Excuse me. Where is Mr Smiths office?-He isn't here now. He here for almost one year.A. doesn't workB. didn't workC. hasn't workedD. won't work)27.-I will take my computer test tomorrow.______ .A. I'm sorry to hear thatB. That's OKC. Good luckD. Congratulations)28. I can't believe ______ a little girl can read many books.A.such; soB.such; suchC.so; suchD.so; so)29.-Did your father agree with you?-He was ______ my plan. He thought it was not safe for a girl to travel alone.A.aboutB.withC.forD.against)30. He has ______ daughter _______ Mary.A.a eight years old; nameB. a eight-year-old; namingC.an eight-years-old; namedD. an eight-year-old; named)31. She didnt call me ,she wrote an e-mail to me.( )25. I'm going to spend my winter vacation with my parents in Hainan.( )21.(江苏苏州中考)In North America, meat eaters are bears and (mountain lions. They eat smaller animals such as rabbits and mice.A.smallestB. the smallestC. largestD. the largest( )22. -Who often helps you ______ your English?-My grandfather . ( A.with; does B.studying; helpsC. with; doD. to study; helps ( ( )23.-Could you please buy __________ drinks and snacks?- .I have no timeA.some; SureB.any; SorryC. some; SorryD. any; Yes ( ( )24. Please stop talking. Our teacher has _____ to tell us.A.something importantB. important somethingC. anything importantD.much important (( )32.(安徽中考)I will meet Jane at the station. Please ______ what time she willarrive.A.countB. chooseC. checkD. catch( )33. Mary with her parents ________ to the UK. They back in three weeks.but only bird food. The bat would rather die of hunger than 42 bird food. When the boy noticed the bat getting thinner, he used the spoon to feed the bat bird food 43 the bat could be used to eating the bird food.Some days later, the bat managed to escape from the cage and 44 home. He began to hunt insects for food with other bats. Later he became strong and enjoyed his life 45 a bat.C.have been; comeD. have been; have come ( ( )34.(山东泰安中考)One of the best ways for people to keep healthy is to (good eating habit. (A.growB. developC. increaseD. find ( ( )35.-Could I your umbrella, Alice? ( -Of course. Here you are. (E. .完形填空.(10分) (There was once a bat 蝙蝠)that was too lazy to hunt insects. One day, he looked 36 ( a window and saw a bird in its cage. The bird was given all its food and water without ( having to do_2Z at all. So the bat decided to become a child pet. m.阅读理解.〔30分〕The bat flew to parks so that he could be seen by some 38 and taken home. However Nick put two big baskets of grapes on his donkey and went to the market to sell them.the bat was not as beautiful as some birds, and the children paid little attention艮少注意).A. ReallyB. HoweverC. InsteadD. Though the best and certainly the cleverest one. But when he wanted to eat, there was no in A.have gone; will come B.has gone; will come ( )36.A. between B.out C.across D.through)37. A. everything )38. A. animals )39. A.take)40. A. sad)41. A.looked)42.A.eat)43. A.because )44. A.returned )45. A. forB. somethingB.menB. keepB.lonelyB. feltB.eatingB. so thatB.leftB. likeC. anythingC.childrenC.regardC.coldC.soundedC.to eatC.unlessC. arrivedC. asD. nothingD. womenD. orderD.happyD. trainedD. eatenD.sinceD.moveD. toFinally, with good luck, he met a little boy who was willing to 39 him as a pet. other men there, and all of them had baskets of grapes. After lunch they went to sleep. The bat was 40 in his cage, in a warm and comfortable house.There he 41 like he was After some time,Nick began to take grapes out of the other mens baskets and putthem inAt midday it was very hot, so he stopped in the shade of a big tree. There were severalSuddenly, one of the men woke up and saw him. "What are you doing? " he said angrily.“Oh〞said Nick, “don worry about me. I am half mad(疯的),and I do a lot of strange things.Oh, really?〞 said the other man. Then why don't you take grapes out of your baskets and put them in somebody els e baskets? You did not understand me'. said Nick. I said that I was half mad, not quite mad.( )6. Nick went to the market _______ .A. to sell his donkeyB. to buy somethingC. to sell his grapesD. to find a job ( )47. Nick stopped .A. under a big treeB. near a big treeC. around a big treeD. in a big tree ( )48. As Nick was taking away the other men s grapes, one of the men .A.didn't see himB. saw him and got angryC. woke his fellows(同伴)upD. came to him ( )49. Nick said that he did a lot of strange things because .A. he was cleverB. he was quite madC. he was foolishD. he was half mad ( )50. In this story Nick was .C. a friendly manD.a clever manBEvery year hundreds of people try to climb the worlds highest mountain or walk through rainforests. Let's take a look at two of them. A mountain climber Do you know that more than 4, 000 people have climbed Qomolangma? Gerlinde Kaltenbrunner is one of them. She s one of the world s greatest climbers and has climbed all the mountains over 8,000 meters in the world. It s difficult to climb mountains in cold weather, but Gerlinde loves jt. She started to climb the mountains near her home as a teenager.An Amazon adventurerEd Stafford is the first person to walk along the Amazon River(亚马孙河).His journey took two years and four months. There are many dangerous animals,but Ed was only bitten(被咬)by small insects(昆虫).During his trip, Ed had to look for fruit or catch fish. Sometimes food was hard to find. So he asked the people of the rainforest for food and help.( )51. Gerlinde started mountain climbing when she .A. left schoolB. became a nurseC.was a teenagerD. finished the trip to Amazon ( )52. What does thehis. A. a selfish(自私的)man B.a mad manunderlined word "it" refer to?A. To climb all the mountains in the world.B. To climb mountains in cold weather.C. To be the worlds greatest climber.D. To climb Qomolangma( )53. What can we know from Eds journey along the Amazon River?A. It took four years and two months.B. It was cold in the rainforest.C. It was easy to find food.D. It was very dangerous.( )54. Ed might NOT see ______ in the rainforest.A.peopleB.planesC. fruitD. insects( )55. Which of the following is TRUE?A. Ed was once bitten by mice on his trip.B Gerlinde is the first person to climb Qomolangma.C. More than 4,000 people climb Qomolangma every year.D. Gerlinde has climbed all the mountains over 8,000 meters in the world.CKnown as the mother river by all the Chinese people. the Huanghe River(Yellow River) is the second longest river in China after the Changjiang River. It is 5,464 kilometers long. It starts from the Kunlun Mountains, northwestern Qinghai Province. It runs through nine provinces and flows to Bohai Sea in Shandong Province. The first appearance of the name"Yellow River" is in The Book of Han. The word "yellow" describes the color of the muddy water in the lower course 下游)of the river.根据以上短文内容,完成下面表格.VIII.用所给词的适当形式填空.(5分)61. You have made a (different) in the activity62. Jill's father used to (control) the company, but now he has retired.63. This is a specially (train) dog and it can do something for you64. Jack is the most popular student in his class because of his _______ (kind).65. (communicate)between parents and teenagers is important.X.根据对话内容,从下面方框中选出五个适当的句子补全对话, 其中有两项是多余的(10 分)A: Hello, what are you looking at?B: 66. I am planning to travel, so they sent me the these to cheer me up. 阅读短文,从方框中选择适当的词并用其正确形式填空, 使短文意思通顺、完整.A: That's nice. Look, this postcard is from Beijing. 67. B: Yeah, I' m sure it is. But Ii Wei says it's tiring to travel around the city. A:68. _____B: Let's see. That's from Peter. He went to London last summer and went inside Buckingham Palace, where the Queen of England lives.A. Oh, it would be fantastic. C: And this is a postcard of Bali Island. Paul was there last week. He said it s very peaceful.A:69. _____B: Um, this one. It's from Disneyland. It's so exciting. Td really love to go. A: 70. Maybe it could be a graduation present for you next year. B: Yes. You are right. I'll try.A. Just some postcards from friends.B. Why not talk about it with your parents?C. Where s this one from?D. How did he go there?E. That's a very interesting place to visit.F. Of all, which postcard do you like best?G. Who is he?X .词语运用.〔10分〕每词限用一次.方框中有两个词是多余的.think, she, grow, trouble, among, mountain, two peace, careful,between, because, makeThere once was a king who offered a prize to the artist who painted the best picture of peace. Many artists tried. The king looked at all the pictures. But there were only two he really liked, and he had to choose 71. them. One picture was a quiet lake. The lake was a perfect mirror 髓子〕for peaceful high mountains all around it. Overhead was a blue sky with white clouds. All who saw this picture 72. that it was a perfect picture of peace.The other picture had 73. , too. But these were rocky. Above was an angry sky, rain fell from it and lightning played in it.Down the side of the mountains fell a waterfall. This did not look 74. at all.But when the king looked 75. , he saw behind the waterfall a small bush〔灌木〕76. in a crack〔裂缝〕in the rock. In the bush a mother bird had built 77. nest 康〕.There sat the mother bird in her nest-in perfect peace.Which picture do you think won the prize? The king chose the 78. picture. Do you know why?79. _________ peace does not mean to be in a place where there is no noise,80. , or hard work, "explained the king."Peace means to be the middle ofall those noisy things and still be peaceful in your heart.That is the real meaning of peace.XI .书面表达.〔15分〕听力材料你的同桌Mary上课时总是和别人说话.你与她的关系不错,但她的行为已经影I.听句子,选择正确的答语.听一遍.1. Could you please turn off the radio?响了你的学习.请你写一封信给她,说说你的想法,并给出适当的建议. 70词左右提示词:deskmate何桌〕,disturb〔打搅;影响〕,get rid of〔改掉〕 2. What were you doing when I called you last night?____________________________________________________________________ 3.Have you ever been to the amusement park?____________________________________________________________________ 4. Where s Jim? Do you know?____________________________________________________________________ 5. May I ask you some questions?____________________________________________________________________ II.听对话及问题,选择正确的答案.听两遍____________________________________________________________________ 6. W: What were you doing when the earthquake happened, Eric?____________________________________________________________________ M: I was reading. My mother was watching TV and my father was cooking.Q: Who was watching TV when the earthquake happened?7. W: Our fight will be at 9: 30 a m. Is that OK?M: No. It's too late. I can't get to the meeting in an hour.Q: When will the meeting start?8. M: What s the matter, Lucy?W: I have a sore throat.Q: What's wrong with Lucy?9. W: Do you like doing the dishes, John?M: No, I hate it, but I often help my mom sweep the floor.Q: What chore does John often do at home?10. M: Have you ever been to the water park, Sarah?W: No, I haven't. What about you, Ben?M: Me neither. But Tina has.Q: Who has been to the water park?HI.听两段对话,选择正确的答案.听两遍.听第一段对话,答复第11〜12小题.M: I haven't seen you for a long time. Where have you been?W: I went to New York with my twin sister.M: How long did you stay there?W: We lived with my aunt for a month. We came back a week ago. M: Where s your sister now? I didn't see her today.W: Oh, she went to the library to borrow a book.听第二段对话,答复第13〜15小题.W: The vacation is coming. What are you doing for it, Thomas?M: I'm going bike riding with my friends. What about you, Rose?W: I have to do chores at home for a few days. My parents both work. M: What are you going to do after that?W: I'm going to Beijing.M: What are you going to do therdW: To visit the Great Wall.M: Who are you going with?W: With my cousin.M: Have a good time!W: You too.IV.听短文,选择正确的答案.听两遍.One day a man was on his way to town with many hats. He was walking through a forest. It was very hot and the man wanted to have a little rest. He put one hat on his head and put the others on the ground. Then he sat down under a tree and soon he fell asleep.When he woke up half an hour later, the man couldn't find his hats on the ground. Then he looked around and found many monkeys in the tree. Each monkey had a hat on its head. He shouted at the monkeys and wanted his hats, but the monkeys didrt understand him. At last he was very angry and he threw his last hat onto the ground. Then the little monkeys threw their hats onto the ground, too. In the end, the man picked up all his hats and went to town.参考答案56.longest 57.northwestern 58.Sea 59.Han 60. waterVIII. 61.difference 62.control 63.trained 64.kindness municationIX. 66-70 AECFBX 71. between 72.thought 73.mountains 74.peaceful 75.carefullyI 1-5 CAAAA II 6-10 ABCBC III 11-15CBCAB IV 16-20 BCCBA V 21-25 DACAA 26-30 CCADD 31-35 CCBBCVI 36-40 DCCBD 41-45 BABACVII 46-50 CABDA 51-55 CBDBD76.growing 77.her 78.second 79.Because 80.troubleXI One possible version:Dear Mary,It's good to be your deskmate. Thank you for helping me so much in my study. Ydue a good girl. But you have just one bad habit. You often talk with others, either in or out of class. You may think it's not a problem. But I should say it really disturbs me. I cant listen to the teachers clearly or put my heart into my homework. I think you should get rid of this bad habit and work hard at your schoolwork. I think saying all this may make you uncomfortable at the moment, but you'll find it good for you.Yours,Tom。
部编人教版2023--2024学年度第一学期八年级语文期末测试卷及答案
D .“契而不舍”应写成“锲而不舍”。
2. 有同学对文段横线处的朝代不清楚,请你帮他填上正确内容。
(用正楷字书写)(1分)活动二在浩瀚太空中,在广袤大地上,总有一抹抹亮色让人刻骨铭心、激扬奋进。
那是夜空中最亮的星【甲】那是中华大地上最耀眼的光。
抗疫战场,义无反顾,最美“逆行者”向险而行,书写责任与担当;无畏艰险,攀登珠峰,8848.86 米不仅是数字,更象征着中华民族勇攀高峰、不懈拼搏的精神;科技探索,星际穿越,“嫦娥”“北斗”,承载着中国乃至人类的智慧之光奋力向前【乙】这一个个壮举,让我们明白了:只有坚守责任与担当,不断钻研与探索,敢于拼搏和挑战,才能创造奇迹。
3. 在文段【甲】【乙】两处依次填入标点,正确的一项是( )(2分)A .分号 省略号B .分号 分号C .逗号 分号D .逗号 省略号4. 画线句作为这段文字的总结句,有一处表达欠妥,请你加以修改。
(2分)修改: 活动三我们向榜样致敬。
【甲】致敬杜甫,您心怀济世情怀,历经磨难,仍不折不挠;【乙】致敬苏炳添,9秒83,冲出亚洲的速度,你不懈坚持,妙手偶得,创出佳绩;【丙】致敬张定宇,您用渐冻的生命,与大○………………内………………○………………装………………○………………订………………○………………线………………○航天的传奇,年过古稀未伏枥,犹向苍穹寄深情。
作为新时代的接班人,我们应该学习榜样精神,踔厉奋发,笃行不怠。
我们面对不同的困难,都应展现出磨而不磷....、涅而不缁....的决心,付出脚踏实地的行动。
学习榜样,绽放青春! 这真是:古今榜样承前启后① ② 继往开来谱新篇5. 画线句中修辞方法或成语使用不恰当...的一项是( )(2分) A .【甲】B .【乙】C .【丙】D .【丁】6. 同学们借助《古汉语常用字字典》为加点的词语作了批注,发现“磨而不磷、涅而不缁”所共同表达出的意思是 。
(2分)7. 文中对联横线处所填内容最恰当的一项是( )(2分) A .①创奇迹 ②盛世少年 B .①造辉煌 ②少年笃行 C .①创奇迹 ②少年笃行 D .①造辉煌 ②盛世少年 二、古诗文阅读(共17分) (一)(共4分) 8.古诗文默写。
内江市2020-2021学年度八年级第一学期期末考试数学试题(word版,有解答)
内江市2020—2021学年度第一学期八年级期末考试数 学第Ⅰ卷(选择题 共48分)一、选择题(本大题共12小题,每小题4分,共48分,在每小题给出的A 、B 、C 、D 四个选项中,只有一项是符合题目要求的)1. 下列说法正确的是( )A. 4的平方根是2B. 16的平方根是±4C. -36的算术平方根是6D. 25的平方根是±52. 下列计算正确的是( )A. a 2+a 3=2a 5B. a 4÷a =a 4C. a 2·a 4=a 8D. (-a 2)3=-a 63. 如图,AB ∥DE ,AC ∥DF ,AC=DF ,下列条件中 不能判断△ABC ≌△DEF 的是( )A. AB=DEB. ∠B=∠EC. EF=BCD. EF ∥BC 4. 如图,已知∠AOB ,以点O 为圆心,任意长度为半径画弧○1,分别交OA 、OB 于点E 、F ,再以点E 为圆心,EF 的长为半径画弧,交弧○1于点D ,画射线OD.若∠AOB=26º,则∠BOD 的 度数为( ) A. 38º B. 52º C. 28º D. 54º5. 一个长方形的面积为4x 2-8xy ,且一边长为2x ,则另一边的长为( )A. 2x -4yB. 2x -4xyC. 2x 2-4xyD.2x 2-4y6. 初二(1)班有48位学生,春游前,班长把全班学生对春游地点的意向绘制成了扇形统计图,其中“想去大千广场的学生数”的扇形圆心角为60º,则下列说法正确的是( )A. 想去大千广场的学生占全班学生的60%B. 想去大千广场的学生有12人C. 想去大千广场的学生占全班学生的1/6D. 想去大千广场的学生肯定最多7. 下列命题正确的是( )A. 等腰三角形的角平分线、中线、高线互相重合B. 在角的内部,到角两边距离相等的点在这个角的平分线上C. 有一个角是60º的三角形是等边三角形D. 有两边及一边的对角对应相等的两个三角形全等 8. 已知x 、y 、z 是正整数,x >y ,且x 2-xy -xz+yz =23,则x -z 等于( )A. -1B. 1或23C. 1D. -1或-23 9. 如图,AD 是△ABC 的角平分线,DE ⊥AB ,垂足为E ,S △ABC =9,DE=2,AB=5,则AC=( ) A. 5 B. 3 C. 4 D. 210.如图1,已知AB=AC ,D 为∠BAC 的平分线上一点,连接BD 、CD ;如图2,已 知AB=AC ,D 、E 为∠BAC 的平分线上两点,连接BD 、CD 、BE 、CE ;如图3, F E A D B CA D OB E F E A B DC F 图1D CA B E 图2 D C A B E 图3 D C A B已知AB=AC ,D 、E 、F 为∠BAC 的平分线上三点,连接BD 、CD 、BE 、CE 、 BF 、CF ;···,依此规律,第n 个图形中全等三角形的对数是( )A. nB. 2n -1C. 2)1(+n nD. 3(n +1) 11. 已知a =2019x +2018,b =2019x +2019,c =2019x +2020,则代数式a 2+b 2+c 2-ab -ac -bc =( ) A. 0 B. 1 C. 2 D. 3 12. 如图,在Rt △ABC 中,∠BAC=90º,∠C=45º, AD ⊥BC 于点D ,∠ABC 的平分线分别交AC 、AD于E 、F 两点,M 为EF 的中点,AM 的延长线交BC 于点N ,连接EN ,下列结论:①△AFE 为等腰三角形;②DF=DN ;③AN=BF ;④EN ⊥NC.其中正确的结论有( )A. 1个B. 2个C. 3个D. 4个第Ⅱ卷(非选择题 共72分)二、填空题(本大题共4小题,每小题4分,共16分,请讲最后答案直接填在题中的横线上.)13. 计算:(2a 2b )2÷ab =_______;14. 已知a 、b 是有理数,若a 2=64,b 3=64,则a +b 的所有值为_________;15. 有一列数:3,6,3,32,15,···,则第100个数是______;16. 如图,在Rt △ABC 中,∠ABC=90º,AC=6,BC=8, 将边AC 沿CE 翻折,使点A 落在AB 上的点D 处; 再将边BC 沿CF 翻折,使点B 落在CD 的延长线上 的点B’处,两条折痕与斜边AB 分别交于点E 、F , 则△B’FC 的面积为__________. 三、解答题(本大题共6小题,共56分,解答时应写出必要的文字说明或演算步骤.)17.(本小题满分11分)(1)计算:53)89(5327233+---+-(2)先化简再求值:[(x+2y )2-(x+y )(3x -y )-5y 2]÷(-21x ),其中x =4,y =2.M E A B D N C F C B E D F B’ A如图,在△ABC 和△ADE 中,AB=AD ,∠B=∠D ,∠1=∠2.求证:BC=DE.19.(本小题满分8分)某校开展以“防疫有我,爱卫同行”为主题的线上活动,举办了A(自制口罩)、B(防疫诗歌)、C(防疫故事)、D(防疫画报)共四个项目的比赛,要求每个学生必须参加且仅参加一项,小颖随机调查了部分学生的报名情况,并绘制了下列两幅不完整的统计图.请根据统计图中信息解答下列问题:(1)本次调查的学生总人数是 人,扇形统计图中“D”部分的圆心角是 度;(2)请将条形统计图补充完整;(3)若全校共有1800名学生,请估计该校报名参加防疫故事和防疫画报比赛的学生共有多少人?20.(本小题满分9分)如图,在△ABC 中,BC 的垂直平分线DE 分别交AB 、BC 于点D 、E ,且BD 2-DA 2=AC 2.(1)求证:∠A=90°; (2)若AB=8,AD:BD=3:5,求AC 的长.A B D C E 1 2 项目 8 A B C D 52 120 120100 80 60 40 20 0 人数 人数 A 60% C B 26% D D A C E B把代数式通过配凑等手段,得到局部完全平方式,再进行有关运算和解题,这种解题方法叫配方法.如:①用配方法分解因式:a 2+6a +8.解:原式=a 2+6a +8+1-1=a 2+6a +9-1=(a +3)2-12=[(a +3)+1][(a +3)-1]=(a +4)(a +2). ②已知M=a 2-2a -1,利用配方法求M 的最小值.解:a 2-2a -1=a 2-2a +1-2=(a -1)2-2∵(a -1)2≥0,∴当a =1时,M 有最小值-2.请根据上述材料解决下列问题:(1)用配方法因式分解:x 2+2x -3;(2)若M=2x 2-8x ,求M 的最小值;(3)已知x 2+2y 2+z 2-2xy -2y -4z +5=0,求x +y +z 值.22.(本小题满分11分)问题发现:(1)如图1,已知C 为线段AB 上一点,分别以线段AC 、BC 为直角边作等腰直角三角形,∠ACD=90°,CA=CD ,CB=CE ,连接AE 、BD ,则AE 、BD 之间的数量关系为 ;位置关系为 .拓展探究:(2)如图2,把Rt △ACD 绕点C 逆时针旋转,线段AE 、BD 交于点F ,则AE 与BD 之间的关系是否仍然成立?请说明理由.拓展延伸:(3)如图3,已知AC=CD ,BC=CE ,∠ACD=∠BCE=90°,连接AB 、AE 、AD ,把线段AB 绕点A 旋转,若AB=5,AC=3,请直接写出旋转过程中线段AE 的最大值.图3 E D C A B D E A C B 图1 D C B A E 图2 F内江市2020—2021学年度第一学期八年级期末考试数学解析第Ⅰ卷(选择题 共48分)一、选择题(本大题共12小题,每小题4分,共48分,在每小题给出的A 、B 、C 、D 四个选项中,只有一项是符合题目要求的)1. 下列说法正确的是( )A. 4的平方根是2B. 16的平方根是± 4C. -36的算术平方根是6D. 25的平方根是±5解析:考查平方根、算术平方根的识记. 难度:★A. 4的平方根是±2;B. 16的平方根是±2;C. -36无算术平方根;故选D .2. 下列计算正确的是( )A. a 2+a 3=2a 5B. a 4÷a =a 4C. a 2·a 4=a 8D. (-a 2)3=-a 6 解析:考查幂的有关运算. 难度:★A. a 2、a 3不是同类项,不能加减;B. a 4÷a =a 3;C. a 2·a 4=a 6;故选D .3. 如图,AB ∥DE ,AC ∥DF ,AC=DF ,下列条件中 不能判断△ABC ≌△DEF 的是( )A. AB=DEB. ∠B=∠EC. EF=BCD. EF ∥BC 解析:考查全等三角形的判定. 难度:★由AB ∥DE ,AC ∥DF 可得∠A=∠D ,又AC=DF ,在已知“一边一角”对应相等的条件下注意“边边角”不能判断全等,故选C .4. 如图,已知∠AOB ,以点O 为圆心,任意长度为半径画弧○1,分别交OA 、OB 于点E 、F ,再以点E 为圆心,EF 的长为半径画弧,交弧○1于点D ,画射线OD.若∠AOB=26º,则∠BOD 的 度数为( ) B. 38º B. 52º C. 28º D. 54º解析:考查尺规作图、全等三角形的判定及性质. 难度:★★由作图过程可得△OED ≌△OEF(S.S.S.),则∠DOE=∠FOE=26º,故选B .5. 一个长方形的面积为4x 2-8xy ,且一边长为2x ,则另一边的长为( )A. 2x -4yB. 2x -4xyC. 2x 2-4xyD.2x 2-4y解析:主要考查多项式除以单项式. 难度:★(4x 2-8xy )÷2x =4x 2÷2x -8xy ÷2x =2x -4y ,故选A .6. 初二(1)班有48位学生,春游前,班长把全班学生对春游地点的意向绘制成了扇形统计图,其中“想去大千广场的学生数”的扇形圆心角为60º,则下列说法正确的是( )A. 想去大千广场的学生占全班学生的60%B. 想去大千广场的学生有12人C. 想去大千广场的学生占全班学生的1/6D. 想去大千广场的学生肯定最多 解析:考查对扇形统计图的理解. 难度:★想去大千广场的学生占全班的60º÷360º=1/6;人数为48×1/6=8;因其他地点的情况不明确,不能判断这类人是否最多,故选C .7. 下列命题正确的是( )A. 等腰三角形的角平分线、中线、高线互相重合B. 在角的内部,到角两边距离相等的点在这个角的平分线上F E A D B C A D O B E FC. 有一个角是60º的三角形是等边三角形D. 有两边及一边的对角对应相等的两个三角形全等解析:考查对所学命题的熟悉程度. 难度:★★A. 等腰三角形的顶角平分线、底边上的中线、底边上的高线互相重合;C. 有一个角是60º的等腰三角形是等边三角形;D. 有两边及一边的夹角对应相等的两个三角形全等.故选B .8. 已知x 、y 、z 是正整数,x >y ,且x 2-xy -xz+yz =23,则x -z 等于( )A. -1B. 1或23C. 1D. -1或-23解析:主要考查对因式分解中的分组分解法的运用,需要一定的分析能力. 难度:★★ 由x 2-xy -xz+yz =(x 2-xy )-(xz -yz )=x (x -y )-z (x -y )=(x -y )(x -z )=23, 又x 、y 、z 是正整数,x >y ,则x -y >0,进而得x -z >0,得x -z =1或23,故选B . 9. 如图,AD 是△ABC 的角平分线,DE ⊥AB ,垂足为E ,S △ABC =9,DE=2,AB=5,则AC=( ) B. 5 B. 3 C. 4 D. 2解析:主要考查角平分线性质的运用,此题的解法可用于17题. 难度:★★★ 由AD 是∠BAC 的角平分线且DE ⊥AB ,则S △ABC =S △ABD +S △ABD =21AB·DE+21AC·DE ,即21×5×2+21×AC ×2=9, 解得AC=4,故选C .10. 如图1,已知AB=AC ,D 为∠BAC 的平分线上一点,连接BD 、CD ;如图2, 已知AB=AC ,D 、E 为∠BAC 的平分线上两点,连接BD 、CD 、BE 、CE ;如图3, 已知AB=AC ,D 、E 、F 为∠BAC 的平分线上三点,连接BD 、CD 、BE 、CE 、 BF 、CF ;···,依此规律,第n 个图形中全等三角形的对数是( )A. nB. 2n -1C. 2)1(+n nD. 3(n +1)解析:考查全等三角形的判定、性质及等差数列求和. 难度:★★★如图1,△ABD ≌△ACD(S.A.S.),则BD=CD ;如图2,除了△ABD ≌△ACD , 同理△ABE ≌△ACE ,则BE=CE ,又BD=CD ,DE=CE ,则△BDE ≌△CDE ; 同理,图3中全等三角形有1+2+3=6对;···,由此规律可得第n 个图形中全等三角形的对数是1+2+3+···+n =2)1(+n n ,故选C . 11. 已知a =2019x +2018,b =2019x +2019,c =2019x +2020,则代数式a 2+b 2+c 2-ab -ac -bc=( ) A. 0 B. 1 C. 2 D. 3解析:考查等式的性质、代数式的恒等变换——配方法及综合分析能力.难度:★★★由已知得b -a =1,c -b =1,c -a =2,则代数式2(a 2+b 2+c 2-ab -ac -bc )=(b -a )2+(c -b )2+(c -a )2=12+12+22=6.故选D .12. 如图,在Rt △ABC 中,∠BAC=90º,∠C=45º,AD ⊥BC 于点D ,∠ABC 的平分线分别交AC 、AD 于E 、F 两点,M 为EF 的中点,AM 的延长线交BC 于点N ,E A B D C F 图1 D CA B E 图2 D C A B E 图3 D C A B连接EN ,下列结论:①△AFE 为等腰三角形;②DF=DN ;③AN=BF ;④EN ⊥NC.其中正确的结论有( )A. 1个B. 2个C. 3个D. 4个解析:考查图形综合应用,主要涉及的知识点有等腰三角形的性质、直角三角形的性质、全等三角形的判定及性质. 难度:★★★由∠BAC=90º,∠C=45º,AD ⊥BC 于点D ,得AB=AC ,AD=BD=CD ,∠ADB=∠ADC=90º,∠ABD=∠CAD=∠C=45º 又BE 平分∠ABC ,得∠ABE=∠CBE=22.5º,进而得∠AEB=∠BFD=67.5º, 则∠AFE=∠AEF ,得①△AFE 为等腰三角形;又M 为EF 的中点,则AM 垂直平分EF , 进而得∠EAM=∠FAM=22.5º=∠ABE ,又AB=CA ,∠BAF=∠ACN=45º, 则△BAF ≌△ACN(A.S.A.),得AF=CN ,③AN=BF ; 进而得②DF=DN ;由BE 平分∠ABC 及BE ⊥AN , 得△BAM ≌△BNM(A.S.A.),则AB=NB ,∠BAN=∠BNA ,则BN=BA ,进而得△BAE ≌△BNE(S.A.S.),则∠BAE=∠BNE=90º,得④EN ⊥NC.故选D .第Ⅱ卷(非选择题 共72分)二、填空题(本大题共4小题,每小题4分,共16分,请讲最后答案直接填在题中的横线上.)13. 计算:(2a 2b )2÷ab =_______;解析:考查幂的有关运算及单项式除以单项式.难度:★.(2a 2b )2÷ab =4a 4b 2÷ab =4a 3b .14. 已知a 、b 是有理数,若a 2=64,b 3=64,则a +b 的所有值为_________; 解析:考查平方根、立方根的意义.难度:★.由a 2=64得a =±8,由b 3=64得b =4,则a +b 的所有值为12,-4.15. 有一列数:3,6,3,32,15,···,则第100个数是______;解析:考查二次根式的乘法及数的规律(此题暴露了出题者不熟悉华师版教材要求). 难度:?(对于数学能力强的学生简单,但老实按照课本走的就难了)分析:13133⋅=⨯=,23236⋅=⨯=,33333⋅=⨯=,...故第100个数是3101003=⋅. 16. 如图,在Rt △ABC 中,∠ABC=90º,AC=6,BC=8, 将边AC 沿CE 翻折,使点A 落在AB 上的点D 处; 再将边BC 沿CF 翻折,使点B 落在CD 的延长线上 的点B’处,两条折痕与斜边AB 分别交于点E 、F ,则△B’FC 的面积为__________.解析:考查直角三角形的勾股定理、三角形面积的有关计算、轴对称图形的性质、角平分线的性质等综合知识. 难度:★★★★由题意,依次可得AB=10,CE=4.8,AE=DE=3.6,S △ACD =17.28,S △BCD =6.72。
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初二期末英语——期末训练[标签:英语试题][当前11082家长在线讨论]三、单项填空(共15分。
每小题1分)从下列各题所给的A、B、C、D四个选项中,选择可以填入空白处的最佳选项。
17. ______ collection can help make money.A. She;herB. His;heC. Her;herD. He;him18. If you want to send your recording ______ email, connect the recorder y our computer.A. by;onB. from;toC. by;toD. in;with19. Many students have interests. Some interests are relaxing and ______ are creative.A. the othersB. othersC. anotherD. the other20. Listen carefully in class ______ , you’ll not understand what to do.A. andB. butC. orD. because21. She asked us ______ that we were in a story.A. imagineB. to imagineC. imaginedD. imagining22. Always read the ______ before you start taking the medicine.A. instructionsB. suggestionsC. informationD. explanation23. —Has John arrived at the hotel?—Not yet. He ______ here______ a couple of days.A. is;inB. will be;withC. was;beforeD. will be;in24. My brother is ______ a hardworking student that he always gets high mar ks.A. soB. veryC. suchD. too25. Day by day, I became ______ to everyone in my class.A. closeB. closerC. closestD. the closest26. —Can you tell me ______ the programme is on?—Yes, it’s on Wednesday, at five o’clock.A. whereB. WhyC. howD. when27. —Do you know______ the first prize in the last Art Festival?—By practicing every day.A. how he gotB. how did he getC. how he will getD. how will he get28. It’s hard to believe that John easily ______ Adam in the last game.A. biteB. bitC. beatsD. beat29. —Which hobby do you think ______ the least space?—Collecting stamps.A. tidies upB. sets upC. takes upD. puts up30. Though he lost the race, he ______ himself to be a good driver to the a udience(观众).A. becameB. provedC. consideredD. found31. I don’t know if he tomorrow. But if he ______ , I’ll tell you.A. will come;will comeB. comes;comesC. will come;comesD. comes;will come四、完形填空(共20分,每小题1分) 阅读下面的短文,掌握其大意,然后从短文后各题所给的A、B、C、D四个选项中,选择最佳选项。
AIQ(intelligence quotient智商)is a score that shows a person’s level of int elligence. People used to believe that some people are born with a high IQ and some aren’t.32 , a study by scientist at University College London has challenged(挑战) this idea. According to an article last October on the Journal Nature, scientis ts are beginning to think that our IQ is not a constant(不变的)score.The scientists tested 33 healthy young people in 2004 between the ages of 1 2 and 16. Then they did tests again four years later, when the same people were between 16 and 20.Scientists found big changes in the IQ scores between 2008 and 2004. Some 33 and some fell 34 as many as 21 points.To test whether these scores were meaningful, the scientists compared them with results from brain scans(扫描). They found that the IQ changes matched cha nges in the structure(结构)of the subjects’ brains. “A change in 20 points is a huge 35 ,” said Professor Cathy Price, who led the research. He said it co uld mean the difference between an average and a 36 person. The team has not found a clear cause for these changes. However, they say it is 37 that educat ion plays a role in changing IQ. “Here we have shown that children’s 38 is likely to be still developing, ” says Price. “We have to be careful not to wr ite off 39 performers at an early stage. In fact, their IQ may improve in a f ew more years. ”32. A. And B. However C. Besides D. Though33. A. rise B. rose C. raise D. raised34. A. of B. with C. by D. from35. A. difference B. matter C. thing D. meaning36. A. successful B. gifted C. able D. rich37. A. natural B. true C. certain D. possible38. A. score B. intelligence C. skill D. interest39. A. clever B. prettier C. nicer D. poorerBAs darkness fell, hundreds of people in the Swiss village left their houses. They were staring(注视)forward at the mountain top in the distance. It was cov ered with ice and snow-beautiful and dangerous.The huge mountain is called Matterhorn. Mountain climbers had 40 the top through the southern route(路线). But no one had ever dared to try a winter cli mbing up the northern side. But now one man was daring to try the 41 route. H e was Walter Bonatti, a great mountain climber 42 Italy. For two days he had climbed. The village people had watched him anxiously(焦虑). Now they were wait ing to see his signal. If he planned to 43 the next day, he would light(点燃) a green signal(信号). A red light would mean that he was turning back. A tiny g reen light 44 high on the mountain side. Bonatti was not giving up! The peopl e 45 . The next day he continued his way upward. He was so lonely and so 46 ! But he would not give up. Again that night he lit the green light. In the mo rning, Bonatti 47 . He could not see the top;he knew he was 48 there. Thoug h the climb was painful, he moved up. Bonatti had spent months 49 for the climb. Was the training enough? Did he have the strength and skill to climb to the top? He was finally at the top! News about his. 50 was radioed to the world.The trip down the southern route was easy. He was warmly welcomed in the vi llage. He had done the “51 ” and would be well remembered as a climber of all time.40. A. reached B. passed C. watched D. followed41. A. comfortable B. important C. difficult D. nervous42. A. with B. from C. in D. at43. A. turn back B. come down C. go on D. get back44. A. placed B. appeared C. pulled D. found45. A. cried B. laughed C. jumped D. cheered46. A. sleepy B. excited C. tired D. happy47. A. woke up B. turned up C. got up D. looked up48. A. already B. almost C. hardly D. surely49. A. training B. practising C. planning D. asking50. A. importance B. success C. climb D. courage51. A. necessary B. dangerous C. perfect D. impossible。