期末测试题(一)

四年级英语下册期末测试题1（答题时间40分钟，满分100分）听力部分（满分60分）一、听一听，圈一圈。

根据录音内容，将下面每组中你认为最符合录音内容的图片的字母画一圆圈圈住。

（每小题1分，共10分）.( ）6. A.sweater B.wear C. weather( ) 7. A. sheep B. jeep C. cheap( ) 8. A. clock B. cloudy C. cold( ) 9. A. It is a clock. B . It's cloudy. C. It is ten o'clock.( )10. A. How many watermelons do you buy?B. How much are the watermelons?C. How much is the watermelon?二、听一听，辨一辩：根据录音内容，判断下面的图片是否与相应的录音内容相符的在该图片的括号内打"√"，不相符的打"×"。

（共10分）三、听录音，根据录音内容补全句子，每空一词。

（每空1分，共10分）1. Look at my new _________. It's __________.2. The ________ is white and the __________ is brown.3. It's __________ o'clock. It's time for ___________.4. We have __________ hens and __________ lambs on the farm.5. There are two new _____________ and a new ___________ in the classroom.四、听录音，根据录音内容给下列图片排序。

人教版数学六年级上期期末预测卷04一、填空题（共10小题，满分20分）1．（2分）4个215相加，用乘法表示就是_________或_________．2．（1分）已知a和b互为倒数，那么145ab÷的计算结果是_________。

3．（1分）六（1）班学生人数在50~60之间。

已知女生人数是男生人数的45，那么女生有_________人。

4．（2分）已知甲数与乙数的比是2:3，并且甲数比乙数少10，那么甲数是_________，乙数是_________．5．（2分）从一个边长是6 cm的正方形纸片上剪下一个最大的圆，这个圆的面积是_________ cm2．再把这个圆对折，所得半圆的周长是_________cm．6．（1分）某班出席48人，有2个人没来，出勤率是_________．7．（3分）()34()÷=（填分数）=_________%=_________（填小数）。

8．（1分）一瓶洗发液，爸爸60天用完，妈妈30天用完．他们俩人合用这瓶洗发液，可用_________天．9．（2分）比80米少20%的是_________米，_________米的20%是60米．10．（5分）思考：按以下方式，用火柴棒搭三角形。

搭1个三角形需要火柴棒_________根；搭2个三角形需要火柴棒_________根；搭3个三角形需要火柴棒_________根；搭10个三角形需要火柴棒_________根；搭n个三角形需要火柴棒_________根.二、选择题（共5小题，每小题2分，满分10分）11．（2分）体育馆在学校的北偏西30︒方向600米处，下面能正确表示体育馆与学校位置关系的图是()A．B．C ．D ．12．（2分）两根同样长的绳子，第一根用去了全长的15，第二根用去了15米，剩下的部分比较( ) A ．第一根长B ．第二根长C ．两根一样长D ．无法比较13．（2分）两个连在一起的皮带轮，其中一个轮子的直径是6分米，当另一个轮子转一周时，它要转3周，另一个轮子的直径是( )分米． A ．2B ．3C ．6D ．1814．（2分）商场搞促销活动，原价80元的商品，现在八折出售，可以便宜( )元． A ．100B ．64C ．1615．（2分）学校买来300本课外书，按照人数的比分配给三个年级．四年级42人，五年级50人，六年级58人．六年级可以分得( )本． A ．84B ．100C ．116D ．150三、判断题（共5小题，每小题2分，满分10分） 16．（2分）3吨钢铁的14和1吨棉花的34同样重。

2023-2024学年北京市九年级数学第一学期期末达标测试试题注意事项：1．答卷前，考生务必将自己的姓名、准考证号、考场号和座位号填写在试题卷和答题卡上。

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一、选择题（每题4分，共48分）1．如图，已知抛物线和直线.我们约定：当x 任取一值时，x 对应的函数值分别为y 1、y 2，若y 1≠y 2，取y 1、y 2中的较小值记为M ；若y 1=y 2，记M= y 1=y 2.下列判断： ①当x ＞2时，M=y 2；②当x ＜0时，x 值越大，M 值越大；③使得M 大于4的x 值不存在；④若M=2，则x=" 1" .其中正确的有A ．1个B ．2个C ．3个D ．4个2．教育局组织学生篮球赛，有x 支球队参加，每两队赛一场时，共需安排45场比赛，则符合题意的方程为（ ）A．B ．C ．D ．3．下列说法正确的是（ ）A ．随机抛掷一枚均匀的硬币，落地后反面一定朝上。

B ．从1，2，3，4，5中随机取一个数，取得奇数的可能性较大。

C ．某彩票中奖率为，说明买100张彩票，有36张中奖。

D ．打开电视，中央一套正在播放新闻联播。

4．如图是我们学过的反比例函数图象，它的表达式可能是（ ）21y x 4x =-+2y 2x =()11452x x -=()11452x x +=()145x x -=()145x x +=36%A ．B ．C ．D ．5．下列图案中，是中心对称图形的是（ ）A ．B ．C ．D ．6．⊙O 的半径为5cm ，弦AB//CD ，且AB=8cm,CD=6cm,则AB 与CD 之间的距离为（）A ．1 cmB ．7cmC ．3 cm 或4 cmD ．1cm 或7cm 7．已知关于的一元二次方程有两个相等的实数根，则锐角等于（ ）A ．B ．C ．D ．8．小李与小陈做猜拳游戏，规定每人每次至少要出一个手指，两人出拳的手指数之和为偶数时小李获胜，那么，小李获胜的概率为（ ）A．B ．C ．D ．9．下列关系式中，y 是x 的反比例函数的是（ ）A ．y ＝4xB ．＝3C ．y ＝﹣D ．y ＝x 2﹣110．如图，⊙O 的直径长10，弦AB=8，M 是弦AB 上的动点，则OM 的长的取值范围是（ ）A ．3≤OM≤5B ．4≤OM≤5C ．3＜OM ＜5D ．4＜OM ＜511．如图所示的工件的主视图是（ ）22y x =4y x =3y x =-3y x=-x 2cos 0x α+=α15 30 45 601325122542512y x 1xA ．B ．C ．D ．12．若△ABC ～△A ′B 'C ′，相似比为1：2，则△ABC 与△A 'B ′C '的周长的比为（ ）A ．2：1B ．1：2C ．4：1D ．1：4二、填空题（每题4分，共24分）13．若弧长为4π的扇形的圆心角为直角，则该扇形的半径为 ．14．因式分解：_______；15．如图，在平面直角坐标系中，已知经过点，且点O 为坐标原点，点C 在y 轴上，点E 在x 轴上，A (-3，2)，则__________．16．矩形ABCD 中，AB=6，BC=8.点P 在矩形ABCD 的内部，点E 在边BC 上，满足△PBE ∽△DBC ，若△APD 是等腰三角形，则PE 的长为数___________.17．已知关于的方程的一个根为-2，则方程另一个根为__________．18．在中，，，在外有一点，且，则的度数是__________．三、解答题（共78分）19．（8分）如图，有一个斜坡，坡顶离地面的高度为20米，坡面的坡度为，求坡面的长度.20．（8分）如果三角形有一边上的中线恰好等于这边的长，那么称这个三角形为“匀称三角形”，这条中线为“匀称中线”．()()2a b b a ---=A E B O C 、、、tan OBC ∠=x 230x mx m ++=ABC ∆AC BC =90C ∠=︒ABC ∆M MA MB ⊥AMC ∠AB B BC AB 25AB（1）如图①，在Rt △ABC 中，∠C ＝90°，AC ＞BC ，若Rt △ABC 是“匀称三角形”．①请判断“匀称中线”是哪条边上的中线，②求BC ：AC ：AB 的值．（2）如图②，△ABC 是⊙O 的内接三角形，AB ＞AC ，∠BAC ＝45°，S △ABC ＝，将△ABC 绕点A 逆时针旋转45°得到△ADE ，点B 的对应点为D ，AD 与⊙O 交于点M ，若△ACD 是“匀称三角形”，求CD 的长，并判断CM 是否为△ACD的“匀称中线”．21．（8分）某班为推荐选手参加学校举办的“祖国在我心中”演讲比赛活动，先在班级中进行预赛，班主任根据学生的成绩从高到低划分为A ，B ，C ，D 四个等级，并绘制了不完整的两种统计图表．请根据图中提供的信息，回答下列问题：（1）a 的值为 ；（2）求C 等级对应扇形的圆心角的度数；（3）获得A 等级的4名学生中恰好有1男3女，该班将从中随机选取2人，参加学校举办的演讲比赛，请利用列表法或画树状图法，求恰好选中一男一女参加比赛的概率．22．（10分）如图，在中，，，，将线段绕点按逆时针方向旋转到线段.由沿方向平移得到，且直线过点.ABC 90C ∠=︒10AB =8AC =AB A 90︒AD EFG ABC CB EF D（1）求的大小；（2）求的长.23．（10分）如图，把Rt △ABC 绕点A ．逆时针旋转40°，得到在Rt △ABʹCʹ，点Cʹ恰好落在边AB 上，连接BBʹ，求∠BBʹCʹ的度数．24．（10分）只有1和它本身两个因数且大于1的正整数叫做素数．我国数学家陈景润在哥德巴赫猜想的研究中取得了世界领先的成果，哥德巴赫猜想是：每个大于2的偶数都可以表示为两个素数的和，如16=3+ 1．（1）若从7， 11， 19， 23中随机抽取1个素数，则抽到的素数是7的概率是_______；（2）若从7， 11， 19， 23中随机抽取1个素数，再从余下的3个数字中随机抽取1个素数，用面树状图或列表的方法求抽到的两个素数之和大于等于30的概率，25．（12分）（1）计算: （2）化简：26．已知抛物线的顶点坐标为（1，2），且经过点（3，10）求这条抛物线的解析式．参考答案一、选择题（每题4分，共48分）1、B【解析】试题分析：∵当y 1=y 2时，即时，解得：x=0或x=2，1∠AE 201224((18--+-⨯--2291(1)693x x x x -⋅+-++2x 4x 2x -+=∴由函数图象可以得出当x ＞2时， y 2＞y 1；当0＜x ＜2时，y 1＞y 2；当x ＜0时， y 2＞y 1．∴①错误．∵当x ＜0时， -直线的值都随x 的增大而增大，∴当x ＜0时，x 值越大，M 值越大．∴②正确．∵抛物线的最大值为4，∴M 大于4的x 值不存在．∴③正确；∵当0＜x ＜2时，y 1＞y 2，∴当M=2时，2x=2，x=1；∵当x ＞2时，y 2＞y 1，∴当M=2时，，解得．∴使得M=2的x 值是1或．∴④错误．综上所述，正确的有②③2个．故选B ．2、A 【分析】先列出x 支篮球队，每两队之间都比赛一场，共可以比赛x （x-1）场，再根据题意列出方程为．【详解】解：∵有x 支球队参加篮球比赛，每两队之间都比赛一场，∴共比赛场数为，故选：A ．本题是由实际问题抽象出一元二次方程，主要考查了从实际问题中抽象出相等关系．3、B【解析】A 、掷一枚硬币的试验中，着地时反面向上的概率为，则正面向上的概率也为，不一定就反面朝上，故此选项错误；B 、从1，2，3，4，5中随机取一个数，因为奇数多，所以取得奇数的可能性较大，故此选项正确；C 、某彩票中奖率为36%，说明买100张彩票，有36张中奖，不一定，概率是针对数据非常多时，趋近的一个数并不能说买100张该种彩票就一定能中36张奖，故此选项错误；D 、中央一套电视节目有很多，打开电视有可能正在播放中央新闻也有可能播放其它节目，故本选项错误.故选B ．4、B【分析】根据反比例函数图象可知，经过第一三象限，，从而得出答案．【详解】解：A 、为二次函数表达式，故A 选项错误；B 、为反比例函数表达式，且，经过第一三象限，符合图象，故B 选项正确；21y x 4x =-+2y 2x =()221y x 4x x 24=-+=--+2x 4x 2-+=12x 2x 2=+=-2+()11452x x -=()11452x x -=12120k >22y x =4y x=0k >C 、为反比例函数表达式，且，经过第二四象限，不符合图象，故C 选项错误；D 、为一次函数表达式，故D 选项错误．故答案为B ．本题考查了反比例函数的图象的识别，掌握反比例函数的图象与性质是解题的关键．5、C【解析】根据中心对称图形的概念即可得出答案.【详解】A 选项中，不是中心对称图形，故该选项错误；B 选项中，是轴对称图形，不是中心对称图形，故该选项错误；C 选项中，是中心对称图形，故该选项正确；D 选项中，不是中心对称图形，故该选项错误.故选C本题主要考查中心对称图形，掌握中心对称图形的概念是解题的关键.6、D【分析】分AB 、CD 在圆心的同侧和异侧两种情况求得AB 与CD 的距离．构造直角三角形利用勾股定理求出即可.【详解】当弦AB 和CD 在圆心同侧时，如图①，过点O 作OF ⊥CD ，垂足为F ，交AB 于点E ，连接OA ，OC ，∵AB ∥CD ，∴OE ⊥AB ，∵AB=8cm ，CD=6cm ，∴AE=4cm ，CF=3cm ，∵OA=OC=5cm ，∴EO=3cm ，OF=4cm ，∴EF=OF-OE=1cm ；当弦AB 和CD 在圆心异侧时，如图②，过点O 作OE ⊥AB 于点E ，反向延长OE 交AD 于点F ，连接OA ，OC ，∵AB ∥CD，3y x=-0k <3y x =-∴OF ⊥CD ，∵AB=8cm ，CD=6cm ，∴AE=4cm ，CF=3cm ，∵OA=OC=5cm ，∴EO=3cm ，OF=4cm ，∴EF=OF+OE=7cm ．故选D ．本题考查了垂径定理、勾股定理；熟练掌握垂径定理和勾股定理，根据题意画出图形是解题的关键，要注意有两种情况．7、D【分析】根据一元二次方程根的判别式等于零，求出的值，进而即可得到答案．【详解】∵关于的一元二次方程有两个相等的实数根，∴∆=，解得：，∴=．故选D ．本题主要考查一元二次方程根的判别式以及特殊角三角函数，掌握一元二次方程根的判别式与根的关系，是解题的关键．8、A【分析】画出树状图，共有25个等可能的结果，两人出拳的手指数之和为偶数的结果有13个，即可得出答案．【详解】解：画树状图如图：共有25个等可能的结果，两人出拳的手指数之和为偶数的结果有13个，∴小李获胜的概率为；故选A ．cos αx 2cos 0x α-+=2(41cos 0α-⨯⨯=1cos 2α=α60 1325本题考查了列表法与树状图法以及概率公式；根据题意画出树状图是解题的关键．9、C【分析】根据反比例函数的定义逐一判断即可．【详解】A 、y ＝4x 是正比例函数；B 、＝3，可以化为y ＝3x ，是正比例函数；C 、y ＝﹣是反比例函数；D 、y ＝x 2﹣1是二次函数；故选：C ．本题考查反比例函数的定义，掌握反比例函数的定义是解题的关键．10、A【详解】解：的直径为10，半径为5，当时，最小，根据勾股定理可得，与重合时，最大，此时，所以线段的的长的取值范围为，故选A ．本题考查垂径定理，掌握定理内容正确计算是本题的解题关键．11、B【解析】从物体正面看，看到的是一个横放的矩形，且一条斜线将其分成一个直角梯形和一个直角三角形．故选B ．12、B【分析】根据相似三角形的周长比等于相似比即可得出结论．【详解】解：∵∽，相似比为1：1，∴与的周长的比为1：1．故选：B ．此题考查的是相似三角形的性质,掌握相似三角形的周长比等于相似比是解决此题的关键．二、填空题（每题4分，共24分）13、1．【分析】根据扇形的弧长公式计算即可，【详解】∵扇形的圆心角为90°，弧长为4π，∴，即4π=，则扇形的半径r=1．y x1x O OM AB ⊥OM 3OM =OM OA OM 5OM =OM 35OM ≤≤ABC A B C '''V ABC A B C '''V r l 180n π=90•180r π故答案为1考点：弧长的计算．14、（a-b ）（a-b+1）【解析】原式变形后，提取公因式即可得到结果．【详解】解：原式=(a -b )2+(a -b )=(a -b )(a -b +1)，故答案为：(a -b )(a -b +1)此题考查了因式分解-提公因式法，熟练掌握提取公因式的方法是解本题的关键．15、【解析】分别过A 点作x 轴和y 轴的垂线，连接EC ，由∠COE =90°，根据圆周角定理可得：EC 是⊙A 的直径、，由A 点坐标及垂径定理可求出OE 和OC ，解直角三角形即可求得．【详解】解：如图，过A 作AM ⊥x 轴于M ，AN ⊥y 轴于N ，连接EC ，∵∠COE =90°，∴EC 是⊙A 的直径，∵A (−3，2)，∴OM =3，ON =2，∵AM ⊥x 轴，AN ⊥y 轴，∴M 为OE 中点，N 为OC 中点，∴OE =2OM =6，OC =2ON =4，∴=．本题主要考查了同弧所对的圆周角相等、垂径定理和锐角三角函数定义，熟练掌握定理是解本题的关键．16、3或1.2【分析】由△PBE ∽△DBC ，可得∠PBE=∠DBC ，继而可确定点P 在BD 上，然后再根据△APD 是等腰三角形，分DP=DA 、AP=DP 两种情况进行讨论即可得.【详解】∵四边形ABCD 是矩形，∴∠BAD=∠C=90°，CD=AB=6，BC=8，∴BD=10，23∠=∠OBC CEO tan OBC ∠tan OBC ∠42tan 63∠===OC CEO OE∵△PBE ∽△DBC ，∴∠PBE=∠DBC ，∴点P 在BD 上，如图1，当DP=DA=8时，BP=2，∵△PBE ∽△DBC ，∴PE ：CD=PB ：DB=2：10，∴PE ：6=2：10，∴PE=1.2；如图2，当AP=DP 时，此时P 为BD 中点，∵△PBE ∽△DBC ，∴PE ：CD=PB ：DB=1：2，∴PE ：6=1：2，∴PE=3；综上，PE 的长为1.2或3，故答案为1.2或3.本题考查了相似三角形的性质，等腰三角形的性质，矩形的性质等，确定出点P 在线段BD 上是解题的关键.17、1【分析】将方程的根-2代入原方程求出m 的值，再解方程即可求解．【详解】解：把x=-2代入原方程得出，4-2m+3m=0，解得m=-4；故原方程为：，解方程得：．故答案为：1．本题考查的知识点是解一元二次方程，根据方程的一个解求出方程中参数的值是解此题的关键．24120x x --=122,6x x =-=18、、【分析】由，可知A 、C 、B 、M 四点共圆，AB 为圆的直径，则是弦AC 所对的圆周角，此时需要对M 点的位置进行分类讨论，点M 分别在直线AC 的两侧时，根据同弧所对的圆周角相等和圆内接四边形对角互补可得两种结果．【详解】解：∵在中，，，∴∠BAC =∠ACB =45°，∵点在外，且，即∠AMB =90°∵∴A 、C 、B 、M 四点共圆，①如图，当点M 在直线AC 的左侧时，,∴；②如图，当点M 在直线AC 的右侧时，∵，∴，故答案为：135°或45°．本题考查了圆内接四边形对角互补和同弧所对的角相等，但解题的关键是要先根据题意判断出A 、C 、B 、M 四点共圆．三、解答题（共78分）19、米【分析】根据坡度的定义可得，求出AB ，再根据勾股定理求135︒45︒90C ∠=︒MA MB ⊥AMC ∠ABC ∆AC BC =90C ∠=︒M ABC ∆MA MB ⊥180∠+∠=︒AMB C 180∠+∠=︒AMC ABC 180********∠=︒-∠=︒-︒=︒AMC ABC AC AC =45∠=∠=︒AMC ABC 25BC AC =AB =【详解】∵坡顶离地面的高度为20米，坡面的坡度为即, ∴米由勾股定理得答：坡面的长度为米.考核知识点：解直角三角形应用.把问题转化为解直角三角形是关键.20、（1）① “匀称中线”是BE ，它是AC 边上的中线，②BC ：AC ：AB；（2）CDa ，CM 不是△ACD 的“匀称中线”．理由见解析.【分析】（1）①先作出Rt △ABC 的三条中线AD 、BE 、CF ，然后利用匀称中线的定义分别验证即可得出答案；②设AC ＝2a ，利用勾股定理分别把BC,AB 的长度求出来即可得出答案.（2）由②知：AC ：AD ：CD ，设AC ，则AD ＝2a ，CD ，过点C 作CH ⊥AB ，垂足为H，利用的面积建立一个关于a 的方程，解方程即可求出CD 的长度；假设CM 是△ACD 的“匀称中线”，看能否与已知的定理和推论相矛盾，如果能，则说明假设不成立，如果不能推出矛盾，说明假设成立.【详解】（1）①如图①，作Rt△ABC 的三条中线AD、BE 、CF ，∵∠ACB ＝90°，∴CF ＝，即CF 不是“匀称中线”．又在Rt △ACD 中，AD ＞AC ＞BC ，即AD 不是“匀称中线”．∴“匀称中线”是BE ，它是AC 边上的中线，②设AC ＝2a ，则CE ＝a ，BE ＝2a ，在Rt △BCE 中∠BCE ＝90°，∴BC ，在Rt △ABC 中，AB ，∴BC ：AC ：AB （2）由旋转可知，∠DAE ＝∠BAC ＝45°．AD ＝AB ＞AC ，B BC AB 2525BC AC =2025AC =50AC =AB ==AB :2:7:2ABC 12AB AB ≠==:2:2a =∴∠DAC ＝∠DAE +∠BAC ＝90°，AD ＞AC ，∵Rt △ACD 是“匀称三角形”．由②知：AC ：AD ：CD设AC，则AD ＝2a ，CD ，如图②，过点C 作CH⊥AB ，垂足为H ，则∠AHC ＝90°，∵∠BAC ＝45°，∴ ∵解得a ＝2，a ＝﹣2（舍去），∴判断：CM 不是△ACD 的“匀称中线”．理由：假设CM 是△ACD 的“匀称中线”．则CM ＝AD ＝2AM ＝4，AM ＝2，∴又在Rt △CBH 中，∠CHB ＝90°，CH ，BH ＝4，∴即这与∠AMC ＝∠B相矛盾，∴假设不成立，2CH AH ===11222ABC S AB CH a ==⨯= CD ==tan AC AMC AM ∠===tan tan CH B AMC BH ===≠∠B AMC∠≠∠∴CM 不是△ACD 的“匀称中线”．本题主要为材料理解题，掌握匀称三角形和匀称中线的意义是解题的关键.21、（1）8 ；（2）；（3）【分析】（1）根据D 等级的人数除以其百分比得到班级总人数，再乘以B 等级的百分比即可得a 的值；（2）用C 等级的人数除以班级总人数即可得到其百分比，用360°乘以其百分比得到其扇形圆心角度数；（3）画树状图可知，共有12种均等可能结果，恰好选中一男一女的有6种．然后根据概率公式求解即可【详解】解：（1）班级总人数为 人，B 等级的人数为 人，故a 的值为8；（2）∴C 等级对应扇形的圆心角的度数为．（3）画树状图如图：(画图正确）由树状图可知，共有12种均等可能结果，恰好选中一男一女的有6种．∴P （一男一女） 答：恰好选中一男一女参加比赛的概率为．本题考查了列表法与树状图法：利用列表法或树状图法展示所有等可能的结果n ，再从中选出符合事件A 的结果数目m ，然后利用概率公式计算事件A的概率为．也考查了统计图．22、（1）；（2）【分析】（1）根据旋转的性质可求得，AD=AB=10，∠ABD=45°，再由平移的性质即可得出结论；（2）根据平移的性质及同角的余角相等证得∠DAE=∠CAB ，进而证得△ADE ∽△ACB ，利用相似的性质求出AE 即可．【详解】解：（1）∵线段AD 是由线段AB 绕点A 按逆时针方向旋转90°得到，∴∠DAB=90°，AD=AB ，∴∠ABD=∠ADB=45°，∵△EFG 是由△ABC 沿CB 方向平移得到，∴AB ∥EF ，∴∠1=∠ABD=45°；（2）由平移的性质得，AE ∥CG ，∴∠EAC=180°－∠C=90°，144︒121230%40÷=4020%8⨯=16360144 40⨯︒=︒ 144︒61122==12m n45︒12.5AE =∴∠EAB+∠BAC=90°，由（1）知∠DAB=90°，∴∠DAE+∠EAB=90°，∴∠DAE=∠CAB ，又∵∠ADE=∠ADB+∠1=90°，∠ACB=90°，∴∠ADE=∠ACB ，∴△ADE ∽△ACB ，∴，∵AC=8，AB=AD=10，∴AE=12.5.本题为平移的性质，旋转的性质，相似三角形的判定与性质的综合考查，熟练掌握基础的性质与判定是解题的关键.23、20°【分析】利用旋转的性质及等腰三角形的性质可得∠ABBʹ，再根据直角三角形两锐角互余可得解.【详解】解：由旋转可知：∠BABʹ=40°，AB=ABʹ．∴∠ABBʹ=∠ABʹB ．∴∠ABBʹ==70°．∴∠BBʹCʹ=90°－70°=20°．本题考查了三角形的旋转，灵活利用旋转对应边相等，对应角相等且等于旋转角的性质是解题的关键.24、（1）；（2）【分析】(1)直接根据概率公式计算可得；(2)画树状图得出所有等可能结果，再从中找到符合条件的结果数，利用概率公式计算可得．【详解】解： (1) 因为7， 11， 19， 23共有4个数，其中素数7只有1个，所以从7， 11， 19， 23中随机抽取1个素数，则抽到的素数是7的概率是，故答案为. (2)由题意画树状图如下：AD AE AC AB=00180402-14231414由树状图可知，共有12种等可能的结果，其中抽到的两个素数之和大于等于30的结果有8种，故所求概率本题考查了列表法与树状图法：利用列表法或树状图法展示所有等可能的结果n ，再从中选出符合事件A 或B 的结果数目m ，然后利用概率公式计算事件A 或事件B 的概率．25、（1）1；（2）【分析】（1）根据实数的混合运算法则计算即可；（2）根据分式的运算法则计算即可.【详解】解：（1）原式=2+ =1； （2）.本题考查了实数的混合运算，以及分式的混合运算，熟练掌握运算法则是解答本题的关键.26、y ＝1（x ﹣1）1+1．【分析】根据题意设抛物线解析式为y ＝a （x ﹣1）1+1，代入（3，10）求解即可．【详解】解：根据题意设抛物线解析式为y ＝a （x ﹣1）1+1，把（3，10）代入得a （3﹣1）1+1＝10，解得a ＝1，所以抛物线解析式为y ＝1（x ﹣1）1+1．本题考查了抛物线的问题，掌握抛物线的性质以及解析法、待定系数法是解题的关键．82123P ==43x x +-201222()(18--++⨯--11--1442291(1)693x x x x -⋅+-++()()()2334•33x x x x x +-+=+-43x x +=-。

人教部编版五年级语文下册期末测试题（一）（根据部编版语文五年级下册教材编写）（时间：90分钟分值：100分）姓名：班级：等级：一、积累运用。

（45分）1.读拼音，写汉字。

(12分)línɡ dānɡ jiānɡ yí liáo zhài豆憾阔村náo sāi zhī zhěn biān miáo麻所炮小2. 猜字谜。

(5分)①池中没有水，地里没有土。

( ) ②林字多一半，别当森字猜。

( )③宋字去盖，勿做木猜。

( ) ④一点一横长，两点一横长。

( )⑤千字头，木字腰，太阳出来从下照。

( )3. 选词填空。

显然明显（1）天空乌云密布,( )要下雨了。

（2）事情很( ),任何人都动摇不了他援藏的决心。

因为因而（3）( )猴子知道水手们拿它取乐,所以更加放肆起来。

（4）猴子的放肆和水手的哄笑激怒了孩子,( )引得孩子爬上了桅杆去追猴子。

（本文档有心平如水编写，请勿转载。

）4．在括号里填上“看”的近义词。

（填的字不能重复）（4分）仰（）参（）检（）（）梢博（）（）觉东（）西（）5.品味探究，选择正确的答案。

（4分）(1)“鲁肃回来报告周瑜，果然不提借箭的事，只说……”从这句话中，我感受到鲁肃________A.忠厚守信；B.欺骗周瑜；C.不诚实(2)从“诸葛亮又下令把船掉过来，船头朝东、船尾朝西，仍旧擂鼓呐喊”从这句话中，我感受到诸葛亮 ________________。

A.胆量很大；B.谋划周密，安排巧妙；C.不拍牺牲(3)“雾这样大，曹操定不敢派兵出来。

我们只管饮酒取乐，雾散了就回去。

”这段话是________ 对________ 说的，表现了他________ 的特点。

A.鲁肃诸葛亮贪酒；B.诸葛亮周瑜勇敢；C.诸葛亮鲁肃自信(4)从“曹操的之江上的动静后，就下令说：‘江上雾很大……不要轻易出动。

拨水军弓弩手朝他们射箭便是。

’”从这句话中，我感受到诸葛亮________ ，曹操 ________。

人教版历史七年级上册期末测试题(一)（时间60分钟分值：100分）一、选择题（60分）1．（3分）某同学在他的旅游日记中写道“他们使用的天然火不是人工取的，而是打雷正好击中干燥的木头，点燃了火，又或是火山爆发和森林火灾的火。

他们晚上轮流看火，用灰来保存火种。

”以下选项与日记中的“他们”不相符的是（）A．生活在距今约170万年B．使用打制石器，过群居生活C．用火烧烤食物、防寒、照明、驱兽D．前额低平，眉骨粗大，颧骨突出2．（3分）在下列图片中，反映出我国长江流域河姆渡原始居民文化特征的是（）A．①②B．①④C．②③D．②④3．（3分）如图所示是小明复习夏、商、周更迭知识时制作的年代尺。

可以更有效地学习历史。

下面是小明复习夏、商、周更迭知识时制作的年代尺。

其中空格部分应填（）A．盘庚迁殷B．武王伐纣C．夏朝灭亡D．西周灭亡4．（3分）考古学家们发掘了数以万计的甲骨片，甲骨上所记的都是占卜语言。

凡祭祀、战争、风雨、天象、农业丰歌以及病疫等都是通过占卜向上天请命。

这种文字（见图）最早可能出现在（）A．夏朝B．商朝C．秦朝D．晋朝5．（3分）春秋时期，“耕”“牛”二字经常同时出现在人名中，如孔子有个学生名冉耕，字伯牛；另一个学生名司马耕，字子牛。

这种现象可以用来佐证（）A．当时牲畜是财富的象征B．春秋时期开始饲养牛C．春秋时期已经出现牛耕D．孔子的弟子注重农业6．（3分）如图“汉并天下”瓦当的出土，进一步证明了（）A．西汉建筑技术高超B．汉王朝的兴盛和统一C．西汉统一国家的愿望D．震慑少数民族的手段7．（3分）关于造纸术的发明的叙述，不正确的是（）A．中国是世界上最早发明纸的国家B．西汉前期就从“积漂絮成絮片”中得到启示，发明了纸C．东汉时期，蔡伦改进了造纸术，发明了“蔡侯纸”D．在秦始皇在位时期，纸的使用在我国已经相当普遍8．（3分）到河南南阳旅游，一定要参观医圣祠（如图）．你知道这是为了纪念谁吗？（）A．华佗B．扁鹊C．张仲景D．李时珍9．（3分）我国土生土长的宗教是（）A．佛教B．道教C．伊斯兰教D．基督教10．（3分）被鲁迅称赞为“史家之绝唱，无韵之离骚。

期末测试题一一、单项选择题（每题1分，共15分）1、汽油标号的高低是按研究法的（）高低来划分的。

A、乙辛烷B、正庚烷C、辛烷值D、抗爆性2、装载汽油发动机的车辆，踩油门时控制的是（）。

A、进气B、喷油C、点火D、爆震3、（）是一种能直接测量工件直径、宽度、长度或深度的通用量具，按照读数精度可分为0.1mm、0.2mm、0.05mm和0.02mm。

A、游标卡尺B、百分表C、外径千分尺D、内径千分尺4、自动变速箱油（ATF）油主要具有润滑、（）、液压控制功能。

A、增扭B、液力传递C、降速D、增压5、轮胎规格标识195/60R14 86H中，H指（）。

A、子午线B、速度等级C、负荷等级D、斜线胎6、汽油机主要依据（）来选用汽油牌号。

A、压缩比B、速度C、温度D、气缸数目7、柴油机主要依据（）来选用柴油牌号。

A、速度B、当地季节气温C、压缩比D、气缸数目8、对冷却系统进行排放、加注后是否需要进行排气处理（）？A、需要B、不需要C、无所谓D、不知道9、根据交通部《汽车运输业车辆技术管理规定》，汽车维护应贯彻“预防为主、定期检测、（）”的原则。

A、视情修理B、个人自愿C、按生产厂家规定D、强制维护10、根据《汽车维护、检测、诊断技术规范》有关规定，汽车维护可分为定期维护和（）两大类。

A、非定期维护B、强制维护C、一级维护D、出车前11、汽车维护竣工检验是对承修汽车在维护过程中作业项目维护质量的一次综合检验，由（）来完成。

A、专职检验员和专职修理工B、专职检验员和专业工量具C、专职检验员和专业检测线D、专职修理工和专业检测线12、在汽车正常行驶中，哪个时速最省油（）？A、60km/hB、90km/hC、140km/hD、160km/h13、汽车在进行维护保养过程中什么事最重要的（）？A、维修人员自身安全B、正确对客户车辆进行维护保养C、正确使用维修设备D、维护施工现场秩序14、轿车轮胎磨损后花纹深度应大于（）mm。

高一下期末测试题一、根据首字母及汉语提示完成单词（共10小题，每题1分，共10分）1. It's illegal to read people's private letters without p____________ (允许).2. The situation put us at a serious d___________ (不利).3. This book c___________ (包含) all the information you need.4. We want to e_______（装备）your children with some special skills.5.Do you like Disney c _______ (卡通) characters?6. The a_____________ (气氛) changed as soon as she walked in.7. He is weak with h________ (饥饿), so I have to support him.8. I am unconcerned with questions of r_________ (宗教) or morality.9. He has made an important c___________(贡献) to the company's success.10.There is no difficulty in the worl d that cannot be o________ (克服).二、单项选择（共20小题，每题1分，共20分）11. About 60 percent of the students ____ from the south, the rest of them ___ from the north and foreign countries.A. are; isB.are; areC.is; areD.is; is12. It is bad _____ to talk with your finger _____ at the other person.A. manners, pointsB. manner, to pointC. manners, pointingD. manner, pointed13. After the new technique was introduced, the factory produced_____ cars in 2008 as the year before.A. as twice manyB. twice as manyC. as many twiceD. twice many as14.—Kobe, are you willing to train your son to be a professional player?—Frankly speaking, I hope he can d o whatever his interests.A. fitsB. matchesC. suitsD. needs15. ---I wonder if I coul d possibly use your car for tonight?--- _____. I’m not using it anyhow.A. Sure, go ahead.B. I d on’t knowC. Yes, ind eed.D. I d on’t care16. I shall never forget the day _______ Shen Zhou V was launched, ________ has a great effect on my life.A. that, whichB. when, whichC. which, thatD. when, that17. _____ be successful in our study.A. Only by working hard can weB. By only working hard we canC. Only we can by working hardD. Only by working hard we can18. Tom admitted ______ in the examination and he was not admitted _____ the school at last.A. to cheat; toB. cheating; toC. to cheat; asD. cheating; as19. He suggested that the stud ents ____the farmers get in crops.A. to helpB. helpC. helpedD. helping20. ______you’ve got a chance, you mig ht as well make full use of it.A. Now thatB. AfterC. AlthoughD. As soon as21. －Shall we go to the art exhibition right away? －__________. .A. It’s your opinionB. I d on’ t mindC. It’s up to youD. That’s what you said22.From the top of the buil ding,you can see at l east_______distance of 100 kilometers on_____cl ear day.A.a,theB.不填，aC.the,aD.a,a23. The kind-hearted coupl e treat the orphan very well as if he ____ their own son.A. isB. wereC. had beenD. should be24.Do tell me the ways you think of_______the problem as soon as possible.A.to solveB.solvingC.solveD.being solved25. It is generally consid ered unwise to give a chil d _____ he or she wants.A. howeverB. whateverC. whicheverD. whenever26. —What happened to your trousers? —They need ______.A. to mendB. being mend edC. mendingD. mend ed27. In our school there are 2,000 students, four fifths of _________ are boys.A. whichB. whomC. whichD. who28. The soldiers narrowly escaped ________ in the hot battle.A. to killB. to be kill edC. being killedD. have killed29. —Your mother is very strict with you. —____. She never lets off a single mistake of ours.A. So she isB. So is sheC. She is soD. So does she30.-----Has the d octor arrived yet? -----No,she _______an hour ago.A.has to comeB.ought to have comeC.should comeed to come三、完形填空（共15小题，每题2分，共30分）Everybody knows Charlie Chaplin, a world-famous funny actor. Peopl e everywhere have laughed at Charlie Chaplin's films 31 tears run down their faces. From his very first 32 they know what will happen. The little man is always with black moustache, wide-open eyes, round black hat and 33 too large for his feet. He’ll 34 through snow, and fall from wind ows. He’ll fight men who are twice his 35 or fall in love with women, who 36 notice him and try to hug them.The poor man that Charlie Chaplin 37 in dozens of films makes all kinds of stupid mistakes. He is always in trouble but he never 38 .He dreams of becoming a great man.Even people who d on’t und erstand English can 39 Chaplin's films, because they are mostly 40 .It isn't what he says that makes people laugh. His comedy doesn't depend on words. It d epends on little 41 which mean the 42 thing to peopl e all over the world.Chaplin raises his thick eyebrows or rolls his eyes. He hides behind a fat lady or under a tabl e to escape from his 43 . He dresses well and pretends to be a rich and important man. It is all so hopel ess and 44 that he makes us laugh. This is the 45 of Chaplin's huge success.31. A.if B. once C. because D. until32. A.disappearance B. appearance C. words D. emotions33. A.trousers B. stocks C. shoes D. hands34. A.sl eep B. sit C. play D. struggle35. A.length B. size C. greatness D. width36. A.hardly B. deeply C. widely D. luckily37. A.played B. recognized C. loved D. fooled38. es d own B. gets away C. goes back D. gives up39. A.observe B. watch C. enjoy D. see40. A.frightening B. silent C. pleasant D. moving41. A.actions B. expressions C. stories D. words42. A.some B. different C. same D. bitter43. A.enimies B. own C. characters D. films44. A.possibl e B. impossible C. instructive D. tired45. A.way B. beginning C. theory D. secret四、语法填空（共10小题；每小题1.5分，满分15分）One day, a wolf had a bone __ 46_ _ (stick) in his throat unexpectedly and ___47__(suffer) greatest pain. He ran _ 48__ and d own asking every animal he met to remove the bone from him, at the same time __49__ (suggest) a reward to the successful operator. A crane (鹤)moved by 50 promise, ventured her long neck d own the wolf’s throat, and drew out the bone. She then asked for the 51 (promise) reward. To her question, the wolf showing his teeth with 52 ugly smile, replied, “Ungrateful creature! You put your head into a wolf’s mouth, and took it out in safety. 53 dare you ask for more reward than this?”Those___54___are only in the hope of a return must not be surprised when they come face to face with bad men. What they meet with are more laughs 55 thanks.五、阅读理解（共25小题，每题2分，共50分）AIn China most people these days know what it means to have an “English teacher”, since almost all pupils studyEnglish from their third year. In primary school the first English teacher will usually be a young and l ovely lady. But my first English teacher is no other than my father. Looking back, I can see that, when I was only a littl e girl, he created an English environment by providing me with flashcards（识字卡），fun English- language toys and even dolls which can sing English songs! My interest in English had certainly been awakened when I began to learn English at school. Just imagine, he went a step further and asked me to learn New Concept English by myself! I was confused and even angry. I coul d not und erstand why a father coul d be so strictwith his little girl. All the same, he never gave up and he gently insisted that I foll ow through with his id ea. At first, I read stories with tears and I actually hated them because they were too difficult for me. In the end, I came to love the funny stories and, to be honest, my father was always there with a helping hand. I am sure that my English woul d never have got so far without his support. And that’s why my father is not only my first English teacher but also my lifelong teacher. He is the one who aroused my interest, gave me confid ence and offered me much need ed help. 56．Most pupils in China begin to learn English________.A．from parents B．in primary school C．at home D．at three years ol d57．The underline part “no other than my father” in the passage probably means________.A．my father himself B．not my father C．like my father D．not only my father58．From the whole passage we can see that________.A．the girl hates her father because he was strict B．the girl is very thankful to her fatherC．the girl preferred playing to learning EnglishD．the father gave up after knowing his daughter coul d not understand 59．Which of the foll owing is NOT true according to the passage?A．The girl’s father is her first English teacher.B．The girl had been interested in English before going to school.C．The girl’s father was always ready to help her with her English.D．The girl coul d have l earned English well by herself without her father.60．What would be the best titl e for the passage?A．The relationship between my father and I B．How I l earned English at schoolC．My father---my first and lifel ong English teacher D．I’ve made progress in English learningBThere exist cruel wars, fighting and sadness in the world today, so it's not only necessary, but also essential to have a good sense of humor just to help us tide through difficult times in our lives. Putting a smile on someone's face when you know they are feeling depressed, as the saying goes, makes me feel good and warms my heart.How would you feel if you could not joke around with your wife, husband, child, co-worker neighbor, cl ose friend, or even just someone that you are standing in line with at your comer store? I am always saying things that make others smil e or laugh, even if I don't know the person I'm joking around with. My Grandma always found humor in everything she did, even if it was the hardest job anyone could imagine. This not only relieves stress in any situation, but also is common courtesy (礼貌) to speak to others that are around you.I know of a few people that d on’t have a funny bone in their bodies, as they say. Everyone around them could be rolling on the floor after hearing a great joke and they would sit there without the slightest smile on their face. They don't get the joke that makes others laugh. I am busting a gut while they just sit there, looking at me as if I were from outer space. How can peopl e not get a really funny joke?Laughing is essential to keep your stress levels under control. Without humor we woul d find ourselves with a lot of psychol ogical problems, or on a lot of medications to keep us from going crazy. There is too much sadness in this present worl d. It drives peopl e crazy. We all need to find a way to bypass the sadness and bring a little light into our lives. So, I believe our best medicine is to get together and tell some jokes and have some fun laughing together.61. According to the author, humor is useful in the aspect that ____________.A. it can pick up people' s spiritsB. it can help peopl e get on well with othersC. it can help get rid of the cruelty in the worldD. it makes peopl e more confident62. The author answers the question in the second paragraph with ___________.A. facts and d escriptionsB. evidence and argumentC. examples and conclusionD. stories and persuasion63. The und erlined phrase “busting a gut" in the third paragraph can be replaced by __________.A. keeping silentB. speaking loudC. laughing hardD. explaining carefully64. In writing the passage, the author mainly intends to __________.A. talk about his own understanding of humorB. encourage peopl e to be humorous in daily lifeC. introduce a practical way to get through daily lifeD. convince people of the power of being optimistic about life65. What is the author' s attitud e towards the present worl d?A. IndifferentB. PositiveC. SatisfiedD. CriticalCks5uWhen asked what they have done to help protect the environment, most peopl e will almost mention recycling. Recycling in the home is very important of course. However, being forced to recycle often means we already have more material than we need. We are d ealing with the results of that over–consumption in the greenest way possible, but it would be far better if we did not need to bring so much material home in the first place.The total amount of packaging has increased by 12% between 1999 and 2005. It now makes up a third of a typical househol d’s waste in the UK. In many supermarkets nowadays food items are packaged twice with plast ic and cardboard.Too much packaging is doing serious damage to the environment. The UK, for example, is running out of it for burying this unnecessary waste. If such packaging is burnt, it gives off greenhouse gases which go on to cause the greenhouse effect. Recycling helps, but the process itself uses energy. The solution is not to produce such items in the first place. Food waste is a serious probl em, too. Too many supermarkets encourage customers to buy more than they need. However, few of them are coming round to the idea that this cannot continue, encouraging customers to reuse theirplastic bags, for example.But this is not just about supermarkets. It is about all of us. We have l earned to associate packaging with quality. We have learned to think that something unpackaged is of poor quality. This is especially true of food. But it is also applied to a wide range of consumer products, which often have far more packaging than necessary.There are signs of hope. As more of us recycle, we are beginning to realize just how much unnecessary materials are collected. We need to face the wastefulness of our consumer culture, but we have a mountain to climb.66. The und erlined phrase “that over-consumption” refer to______________.A. Having more material than is need ed．B. Recycling too many wastes．C. Making more products than necessary．D. Using too much packaging．67. The author uses figures in Paragraph 2 to show ___________．A. the tendency of cutting household wasteB. the increase of packaging recyclingC. the rapid growth of supermarketsD. the fact of packaging overuse68. According to the text, recycling ___________．A. helps control the greenhouse effectB. means burning packaging for energyC. is the solution to gas shortageD. leads to a waste of land69. It can be inferred from Paragraph 4 that____________.A. Unpackaged products are of bad quality．B. It is improper to judge quality by packaging．C. Other products are better packaged than food．D. Supermarkets care more about packaging．70. What can we l earn from the last paragraph?A. People like collecting recyclable wastes．B. Needl ess material is mostly recycl ed．C. Fighting wastefulness is difficult．D. The author is proud of their consumer culture．DThe majority of parents and children experience some tension with one another The evidence for harmony may not be obvious in some families. But it seems that four out of five young peopl e now get on with their parents, which is the opposite of the popularly hel d image of unhappy teenagers locked in their room after endless family quarrels.An important new study into teenage attitud es surprisingly shows that their family life is more harmonious than it has ever been in the p ast. “We were surprised by just how positive today’s young peopl e seem to be about their families,” said one member of the research team. “They’re expected to show rebellion(叛逆) and selfishness but actually they have other things on their minds; they want a car and material goods, and they worry about whether school is serving them well. There’s more negotiation (商议) and discussion between parents and children, andchildren expect to take part in the family decision-making process. They d on’t want to rock the boat.”So it seems that this generation of parents is much more likely than parents of 30 years ago to treat their children as friends. “My parents are happy to discuss things with me and willing to listen to me,” says 17-years-ol d Daniel Lazall. “I always tell them when I’m going out clubbing. As long as they know what I’m doing, they’re fine with it.” Susan Crome, who is now 21, agrees. “Looking back on the last 10 ye ars, there was a lot of what you could call negotiation. For example, as long as I’d done all my homework, I coul d go out on a Saturday night. But I think my grandparents were a lot stricter with my parents than that.”Maybe this positive view of family life should not be unexpected. It is possibl e that the idea of teenage rebellion is not rooted in real facts. A researcher comments, “Our surprise that teenagers say they get al ong well with their parents comes because of a brief period in our social history when teenagers were regard ed as different beings. But that idea of rebelling and breaking away from their parents really only happened during that one time in the 1960s when everyone rebell ed. The normal situation throughout history has been a smooth change from helping out with the family business to taking it over.”71. What is the popular image of teenagers today?A. They hate living with their parents.B. They are worried about school.C. They often quarrel with other family members.D. They have to be l ocked in the room to avoid troubl es.72. The study shows that t eenagers d on’t want to ______.A. make family d ecisionsB. cause trouble in their familiesC. go boating with their familyD. share family responsibility73. Compared with parents of 30 years ago, today’s parents______.A. care little about their chil dren’s lifeB. go to clubs more often together with their childrenC. are much stricter with their childrenD. give their children more space74. According to the author, teenage rebellion ______.A. is very common nowadaysB. may be a false beliefC. existed only in the 1960sD. resulted from changes in families75. What is the passage mainly about?A. Harmony in familyB. Negotiation in familyC. Teenage troubl e in familyD. Education in family.EMicrowaves are usually used to warm up food, but what about warming people?Using microwaves to directly heat owners of a room would save much of the energy wasted by heating walls and furniture. And despite popular ideas about microwaves, this technique would be safe, according to Charles R. Burlier of the Microwave Research Center in Marlborough, New Hampshire. Low-power microwaves only penetrate (贯穿) the skin (l ow-power microwave penetration in a ham is about 0.2inches, for example) and with no negative effects.To test this idea, Buffler subjected himself to microwaves in a special room using a standard 500-watt, 2459 MHz magnetron (磁控管). He found that a person will start to feel warmth at about 20 milliwatts per square centimeter (mw. / sq. cm.) ; a satisfactory feeling of warmth occurs between 35 and 50mw. / sq. cm. By comparison, a person standing in noonday summer sun feels the amount of 85 mw. / sq. cm. And a frozen meat pie in your microwave oven receives about 1000 mw. / sq. cm.In houses of the future, each room could be provid ed with its own magnetron, says Buffler. When you stepped into the living room, for example, a motion detector woul d turn on the magnetron, filling the room with l ow-power microwaves. In the same way that a microwave oven heats up a hamburger, but not the plate it’s on, you woul d feel warmth from the microwaves without changing the temperature of your coffee table. (You could, however, make your favorite easy chair even more comfortable by treating it with a radiation-absorbing chemical. ) While it might be some time before homeowners are comfortable enough with the id ea to set up whole-body microwave heaters in houses, Buffl er says microwaves may attract livestock farmers. Lambs that are born outdoors in winter, for example, are frequently lost to cold. Microwaves coul d warm the lambs safely and quickly.76. Which of the foll owing can tell the main idea of the passage?A. A new heating system.B. A new microwave oven.C. A popular technique.D. The magnetron.77. According to paragraph 2, which of the foll owing d oes not describe the characteristics of a microwave heater?A. It directly heats people in a roomB. It heats walls and furniture in a room.C. It is safe.D. It saves energy．78. The test conducted by Buffl er shows that when a person feels comfortable warmth, he receives about______.A. 20 mw. / sq. cm.B. 40 mw. / sq. cm.C. 60 mw. / sq. cm.D. 85 mw. / sq. cm79. According to paragraph 4, which of the foll owing fills the room with l ow-power microwaves?A. The magnetron.B. A frozen meat pie.C. The microwave oven.D. The radiation-absorbing chemical.80. Which of the foll owing statements about microwave heaters woul d Buffler most probably agree with?A. Microwave heaters will soon be widely used by homeowners.B. Microwave heaters sometimes make people feel uncomfortable.C. Perhaps microwave heaters will be first used by livestock farmers, who wish to protect their lambs in winter.D. Microwave heaters cannot be accepted by the public because they are somewhat unsafe.七、基础写作（满分15分）假如你校要举办一次主题为“How to communicate with friends”的英语演讲比赛，请你用英语写一篇演讲稿。

统编版四年级语文下册期末测试卷一一、读拼音，写词语。

(4分)guīju méng lóng pìrúcàn làn二、给加点字选择正确的读音，用“√"标出。

(4分)慰藉．(jìjiè) 栖．息(qīxī) 倔强．( qiáng jiàng)拽．开( zhài zhuài) 焚．烧( féng fén) 沮．丧(jǚjǔ)刹．那( shàchà) 徜徉．( yáng xiáng)三、按要求填空。

(3.5分)1.“浓”在词典中的意思有：①液体或气体中所含的某种成分多，稠密(跟“淡”相对)；②(颜色)深；③程度深。

下列词语中的加点字应选哪种意思?(填序号)浓．香（）睡意正浓．（）浓．妆艳抹（）2.选词填空。

浓郁浓厚浓荫浓密(1)最近，他对航模产生了( )的兴趣。

(2)花园里( )的花香吸引了许多蝴蝶。

(3)太阳光被( )的树叶遮住，形成了一片（）。

四、画出词语中的错别字并改正。

(4分)前府后仰( ) 依山旁水( ) 舍已为人( ) 无优无虑（）心喜若狂( ) 相题并论（）空空如野（）振耳欲聋（）五、在括号里填上合适的字，使每组都能成为六个成语。

(5分)1.开门见（）穷水（）善尽（）中不（）智多（）财害命2.眉开眼（）逐颜（）天辟（）大物（）大精（）不可测3.欢天喜（）利人（）风细（）过天（）空万（）应外合六、填入括号中的关联词，正确的一项是（）(2分)( )虚心地承认错误、缺点，( )决心改正这些错误、缺点，从错误、缺点中学会新的知识、本领，( )能使知识不断深化，( )逐步掌握规律，取得胜利。

A.只要或者才而B.只有或者就因而C.只要并且就因而D.只有并且才从而七、下面句子没有语病的一项是( )(3分)A.后来，海水渐渐沉下去，陆地渐渐漫上来，逼近那古老的森林。