中考真题 北师大版5
初三数学中考试卷(北师大版,含答案)
初三数学中考试卷一、选择题(本题共10个小题，每小题4分，共40分。
请选出各题中其中一个符合题意的正确选项，不选、多选、错选均不给分)1．冬季的一天，室内温度是8℃，室外温度是－2℃，则室内外温度相差( )A、4℃B、6℃C、10℃D、16℃2．一个不透明的袋中装有除颜色外其余均相同的5个红球和3个黄球，从中随机摸出一个，则摸到黄球的概率是（）A、 B、 C、 D、3．右图中几何体的正视图是( )4．吋是电视机常用规格之一，1吋约为拇指上面一节的长，则7吋长相当于( )A、课本的宽度B、课桌的宽度C、黑板的高度D、粉笔的长度5．已知⊙O的直径AB与弦AC的夹角为35°，过C点的切线PC与AB的延长线交于点P，则∠P等于( )A、15°B、20°C、25°D、30°6．如图，设M、N分别是直角梯形ABCD两腰AD、CB的中点，DE⊥AB于点E，将△ADE沿DE翻折，M与N恰好重合，则AE∶BE等于( )A、2∶1B、1∶2C、3∶2D、2∶37．不等式的解集是( )A、 B、 C、 D、8．若有一条公共边的两个三角形称为一对“共边三角形”，则图中以BC为公共边的“共边三角形”有( )A、2对B、3对C、4对D、6对9．小敏在某次投篮中，球的运动线路是抛物线的一部分(如图)，若命中篮圈中心，则他与篮底的距离l是( )A、3.5mB、4 mC、4.5 mD、 4.6 m10．如图，正方形OABC，ADEF的顶点A，D，C在坐标轴上，点F在AB上，点B，E 在函数的图象上，则点E的坐标是( )A、 B、C、 D、二、填空题(本题有6小题，每小题5分共30分)11．当______________时，分式的值为0.12.据媒体报道，今年“五一”黄金周期间，我市旅游收入再创历史新高，达1290000000元，用科学记数法表示为______________元.13．如图是小敏五次射击成绩的图，根据图示信息，则此五次成绩的平均数是_____________环。
2024年北师大版中考物理试题及解答参考
2024年北师大版物理中考自测试题(答案在后面)一、单项选择题（本大题有10小题，每小题3分，共30分）1、下列关于速度的说法正确的是：A、速度是表示物体运动快慢的物理量，单位是米每秒（m/s）。
B、速度越大，物体运动越慢。
C、速度为零时，物体一定处于静止状态。
D、物体的速度为零，但加速度不为零。
2、一个物体在水平面上做匀速直线运动，下列说法正确的是：A、物体的速度一定为零。
B、物体的加速度一定为零。
C、物体的合外力一定为零。
D、物体受到的摩擦力一定为零。
3、在下列哪个情况下，物体的动能是零？A、物体在水平面上匀速直线运动B、物体从静止开始自由下落C、物体在竖直方向上做匀速上升运动D、物体在水平面内做匀速圆周运动4、一个物体在水平面上受到一个大小为10N的力作用，如果物体在水平面上做匀速直线运动，那么物体所受的摩擦力大小是多少？A、0NB、5NC、10ND、无法确定5、一个物体在水平面上做匀速直线运动，若突然受到一个水平向左的摩擦力作用，物体将会发生什么现象？A、速度逐渐增大B、速度逐渐减小C、运动方向改变D、运动状态不变6、下列关于光的传播特性的描述中，正确的是：A、光在同种均匀介质中沿直线传播B、光在真空中的传播速度小于在空气中的传播速度C、光从空气进入水中时，光的传播速度增加D、光从水中进入空气时，光的传播方向不会发生改变7、一个物体在水平面上做匀速直线运动，下列说法正确的是：A、物体的速度不变，加速度为0。
B、物体的速度不变，加速度不为0。
C、物体的速度在减小，加速度为负。
D、物体的速度在增大，加速度为正。
8、一个物体在水平方向上受到两个力的作用，一个向东，一个向西，且大小相等，那么：A、物体一定静止。
B、物体一定做匀速直线运动。
C、物体的运动状态取决于受力时间。
D、物体可能静止，也可能做匀速直线运动。
9、一个物体从静止开始做匀加速直线运动，3秒内通过的路程是18米，那么物体的加速度是：A. 2 m/s²B. 3 m/s²C. 4 m/s²D. 5 m/s²二、多项选择题（本大题有2小题，每小题3分，共6分）1、题干：下列现象中，属于能量转换的是：A、水从高处流向低处，水轮机转动B、电能通过加热使灯泡发光C、摩擦生热使物体温度升高D、物体从高处落下，速度越来越快2、题干：关于光的传播和折射现象，下列说法正确的是：A、光在同种均匀介质中沿直线传播B、光从空气斜射入水中时，折射角大于入射角C、光从水中斜射入空气中时，折射角小于入射角D、光从一种透明介质斜射入另一种透明介质时，传播方向会发生改变三、填空题（本大题有5小题，每小题4分，共20分）1、在匀速直线运动中，物体在单位时间内通过的路程称为速度。
中考数学考点大串讲(北师大版)：专题05 投影与视图(基础30题2种题型)(解析版)
专题05投影与视图（基础30题2种题型）一、投影1．（2023秋·陕西西安·九年级高新一中校考阶段练习）正方形纸板在太阳光下的投影不可能是（）A．平行四边形B．一条线段C．矩形D．梯形【答案】D【分析】根据平行投影的性质，进行判断即可．【详解】解：一张正方形纸板在太阳光线的照射下，形成影子不可能是梯形，故选：D．【点睛】本题考查平行投影．熟练掌握平行投影的性质，是解题的关键．2．（2023秋·七年级课时练习）下图中各投影是平行投影的是（）A．B．C．D．【答案】C【分析】根据平行投影定义即可判断．【详解】解：只有C中的投影线是平行的，且影子长度与原物体长度比一致．故选：C．【点睛】本题考查了平行投影的知识，牢记平行投影的定义是解题的关键．3．（2023秋·七年级课时练习）中心投影的光线是（）A．平行的B．从一点发出的C．不平行的D．向四面发散的【答案】B【分析】根据中心投影的定义即可解答．【详解】解：中心投影的光线是从一点发出的，故选：B．【点睛】本题主要考查了中心投影的定义，解题的关键是掌握中心投影的光线是从一点发出的．4．（2023秋·全国·九年级专题练习）正午时我们在太阳下的影子长度比下午时我们在太阳底下的影子的长度要．（长，短）【答案】短【分析】根据太阳光不同时刻照射时的角度，以及平行投影的性质判断即可．【详解】解：太阳光可理解为平行光线，正午时刻太阳光照射的角度更大，因此我们于地面形成的影子更短，而下午的时候，照射时的角度变小，在地面形成的影子就更长．故答案为：短．【点睛】本题考查投影，注意理解太阳光是平行光线，并且理解入射角度越大，形成的投影越短，角度越小，形成的投影越长．5．（2022秋·九年级单元测试）某学校操场上立着高度不同的甲、乙两种篮球架，那么在某一时刻的太阳光的照射下，甲种篮球架的高度与其影长的比（填“大于”“小于”或“等于”）乙种篮球架的高度与其影长的比．【答案】等于【分析】根据平行投影的性质进行求解即可．【详解】解：由平行投影的性质可知，在同一时刻物高和影长成正比，即在同一时刻的物高于影长的比值一定，∴甲种篮球架的高度与其影长的比等于乙种篮球架的高度与其影长的比，故答案为：等于．【点睛】本题主要考查了平行投影，熟知平行投影的性质是解题的关键．6．（2023秋·全国·九年级专题练习）由阳光形成的影子是投影，由灯光形成的影子是投影（选题“平行”或“中心”）【答案】平行中心【分析】由平行光线形成的投影是平行投影；由同一点（点光源）发出的光线所形成的投影是中心投影．【详解】由阳光形成的影子是平行投影，由灯光形成的影子是中心投影，故答案为：平行；中心【点睛】本题考查了中心投影和平行投影的概念，熟记概念是解题关键．7．（2023秋·九年级单元测试）把下列物体与它们的投影连接起来．【答案】见解析【分析】根据投影的定义解答即可．【详解】解：如图：【点睛】本题主要考查了投影，理解投影的定义成为解答本题的关键．8．（2022秋·陕西西安·九年级统考期末）如图，在路灯O（O为灯泡的位置）的同侧有两根高度相同的木棒AB与CD，请分别画出这两根木棒的影子．【答案】作图见解析【分析】根据中心投影的定义：由同一点（点光源）发出的光线形成的投影叫做中心投影，物体在灯光的照射下形成的影子就是中心投影，结合光沿直线传播，根据光源和木棒的高度作图即可得到答案．【详解】解：作图如下：影子BE与DF即为所求．【点睛】本题考查中心投影的特点与应用，解决本题的关键是根据光源和两根木棒的物高得影子长．9．（2022秋·陕西咸阳·九年级校考阶段练习）如图，小明和小丽分别站在路灯OA的两侧点B和点C的位置，已知BD为小明在路灯下的影子，请你画出小丽在路灯下的影子CE．【答案】图见解析【分析】作射线OF交直线BA于E，则线段CE即为所求作．【详解】解：如图，CE即为小丽在路灯下的影子．【点睛】本题考查作图-应用与设计作图，中心投影等知识，解题的关键是理解题意，灵活运用所学知识解决问题．二、视图10．（2022·安徽合肥·校考三模）下图是由6个相同的小正方体搭成的几何体，其左视图为（）A．B．C．D．【答案】A【分析】根据三视图可进行求解．【详解】解：由图可知该几何体的左视图为；故选A．【点睛】本题主要考查三视图，解题的关键是熟知几何体的特征．11．（2023·浙江湖州·统考中考真题）已知某几何体的三视图如图所示，则该几何体可能是（）A．B．C．D．【答案】D【分析】主视图、左视图、俯视图是分别从物体正面、左面和上面看所得到的图形，从而得出答案．【详解】解：∵主视图和左视图是矩形，∴几何体是柱体，∵俯视图是圆，∴该几何体是圆柱，故D正确．故选：D．【点睛】本题主要考查了由三视图确定几何体的形状，主要考查学生空间想象能力．12．（2022秋·陕西·九年级校考期中）下图是一个拱形积木玩具，其主视图是（）A．B．C．D．【答案】C【分析】根据从前面看到的图形是主视图，即可求解．【详解】解：根据题意得，其主视图是：故选C．【点睛】本题主要考查了简单几何体的三视图，掌握从前面看到的图形是主视图是解题的关键．13．（2022秋·广东深圳·九年级深圳市福田区石厦学校校考阶段练习）沿正方体相邻的三条棱的中点截掉一个角，得到如图所示的几何体，则它的左视图是（）A．B．C．D．【答案】C【分析】根据左视图是从左面看到的图形判定则可．【详解】解：从左边看，是一个正方形，正方形的右上角有一条虚线．故选：C．【点睛】本题主要考查了几何体的三种视图和学生的空间想象能力，正确掌握观察角度是解题关键．14．（2022·福建泉州·校考模拟预测）如图为某零件支架放置在水平面上，其中支架的两个台阶的高度和宽度相等，则其俯视图是（）A．B．C．D．【答案】D【分析】根据从上面看得到的图形是俯视图，可得答案．【详解】解：从上面看，是一行两个相邻的矩形．故选：D．【点睛】本题考查了简单组合体的三视图，明确从上面看得到的图形是俯视图是解题的关键．15．（2021秋·黑龙江哈尔滨·九年级校考期中）如图所示的几何体是由五个小正方体组合而成的，它的左视图是（）A．B．C．D．【答案】B【分析】从左边看几何体，所看到的是左视图，按左视图的定义进行判断即可.【详解】解：如图，左视图为故选：B．【点睛】本题考查了三视图的定义，理解定义会看出几何体的三视图是解题的关键．16．（2023·海南儋州·海南华侨中学校联考模拟预测）如图是由5个相同的小正方体搭成的几何体，这个几何体的主视图是（）A．B．C．D．【答案】B【分析】根据主视图的意义，从正面看该组合体所得到的图形即可．【详解】主视图为从正面看到的图形，从正面看，第一列有1个小正方形，第二列有2个小正方形，第三列有1个小正方形，故选:B．【点睛】此题考查了简单组合体的三视图-主视图，掌握主视图的含义是解题关键．17．（2022秋·甘肃平凉·七年级统考期末）如图，是某立体图形的三视图，则该立体图形是．【答案】圆锥【分析】由正视图和左视图确定是锥体，再由俯视图确定具体形状．【详解】解：根据正视图和左视图为三角形判断出是锥体，根据俯视图是圆可判断出这个几何体应该是圆锥．故答案为：圆锥．【点睛】本题考查由三视图判断几何体，考查了学生的思考能力和对几何体三种视图的空间想象能力和综合能力．熟练掌握简单几何体的三视图是解题的关键．18．（2023秋·江苏徐州·七年级校考阶段练习）写出一个三视图中主视图、左视图、俯视图完全相同的几何体名称：【答案】球（答案不唯一）【分析】根据主视图、左视图、俯视图是分别从物体正面、左面和上面看所得到的图形解答即可．【详解】解：∵球体的主视图、左视图、俯视图都是圆形，∴这个几何体可以是球体．故答案为：球（答案不唯一）．【点睛】本题考查了几何体的三视图，从前面看到的图形是主视图，从上面看到的图形是俯视图，从左边看到的图形是左视图．19．（2023秋·七年级课时练习）若干桶方便面摆放在桌子上，如图所示是它的三视图，则这一堆方便面共有桶．【答案】6【分析】根据三视图的知识，底层应有4桶方便面，第二层应有2桶，第三层有1桶．【详解】解：综合三视图，这堆方便面底层应该有314桶，第二层应该有2桶，因此共有426桶．故答案为：6．【点睛】本题考查由三视图判断几何体，能够综合三视图进行判断是解题的关键．20．（2022秋·广东茂名·七年级校考期中）从正面、左面、上面看一个几何体，看到形状图完全相同的几何体是（写两个几何体名称）【答案】正方体、球体【分析】根据简单几何体的三视图可得答案.【详解】解：从正面、左面、上面看一个几何体，看到形状图完全相同的几何体是：正方体、球体.【点睛】本题考查的是简单几何体的三视图，掌握柱体，球体，锥体的三视图是解本题的关键.21．（2023秋·全国·九年级专题练习）某圆柱体的实物图和它的主视图如图所示．若6,4AB BC ，则该圆柱体的侧面积等于．【答案】24【分析】首先求出圆柱底面圆的半径，然后利用圆柱的侧面积公式求解即可．【详解】∵4BC ，∴圆柱底面圆的半径为2，∴该圆柱体的侧面积等于22624 ．故答案为：24 ．【点睛】此题考查了圆柱的侧面积，解题的关键是熟练掌握圆柱的侧面积公式．22．（2023春·九年级单元测试）下图是某个几何体的三视图，则该几何体的名称是．【答案】三棱柱【分析】由主视图和左视图确定是柱体，锥体还是球体，再由俯视图确定具体形状．【详解】解：根据主视图和左视图为矩形可得该几何体是柱体，再根据俯视图是三角形可得该几何体是三棱柱．故答案为：三棱柱．【点睛】本题考查学生对三视图掌握程度和灵活运用能力，同时也体现了对空间想象能力方面的考查．主视图、左视图、俯视图是分别从物体正面、左面和上面看，所得到的图形．掌握三视图的相关概念是解题的关键．23．（2023秋·黑龙江大庆·九年级校联考期中）如图所示是由一些相同的小立方体搭成的几何体从正面、左面和上面看到的图形，则所搭这个几何体的小方体有个．【答案】5【分析】从俯视图中可以看出最底层小正方体的个数及形状，从主视图可以看出每一层小正方体的层数和个数，从而算出总的个数．【详解】解：从主视图和俯视图看第一列2个小立方体，第二列2个小立方体，第三列1个小立方体，则此几何体共有2215个小立方体．故答案为：5．【点睛】本题考查由三视图判断几何体．做这类题时要借助三种视图表示物体的特点，从主视图上弄清物体的上下和左右形状；从俯视图上弄清物体的左右和前后形状；从左视图上弄清楚物体的上下和前后形状，综合分析，合理猜想，结合生活经验描绘出草图后，再检验是否符合题意．24．（2022秋·山西太原·七年级校考阶段练习）一个几何体由一些大小相同的小正方块儿搭建，如图是从上面看到的这个几何体的形状如图，小正方形的数字表示在该位置的小正方块儿的个数，请画出从正面和左面看到的几何体的形状图．【答案】见解析【分析】由已知条件可知，主视图有3列，每列小正方数形数目分别为3，2，3；左视图有2列，每列小正方形数目分别为3，3．据此可画出图形．【详解】解：主视图有3列，每列小正方数形数目分别为3，2，3；左视图有2列，每列小正方形数目分别为3，3，作图如下：．【点睛】本题考查几何体的三视图画法，由几何体的俯视图及小正方形内的数字，可知主视图的列数与俯视数的列数相同，且每列小正方形数目为俯视图中该列小正方形数字中的最大数字．左视图的列数与俯视图的行数相同，且每列小正方形数目为俯视图中相应行中正方形数字中的最大数字．25．（2022秋·广东深圳·七年级统考期中）请你在答题卷相应的位置上画出下面几何体的三视图．【答案】见解析【分析】主视图从左到右列正方形个数依次为2，1，1；左视图从左到右列正方形个数依次为2，1；俯视图从左到右列正方形个数依次为2，1，1．【详解】解：作图如下：【点睛】本题主要考查了三视图的画法，掌握三视图分别是从物体正面、左面、上面看到的平面图形．26．（2023秋·江西吉安·七年级校考期末）如图，这是由4个完全相同的小正方体组成的几何体．请分别在网格中画出从正面、左面和上面看到的形状图．【答案】见解析【分析】三视图的具体画法及步骤为：①确定主视图位置，画出主视图；②在主视图的正下方画出俯视图，注意与主视图“长对正”；③在主视图的正右方画出左视图，注意与主视图“高平齐”、与俯视图“宽相等”．画物体的三视图的口诀为：主、俯：长对正；主、左：高平齐；俯、左：宽相等．【详解】解：如图所示：【点睛】本题主要考查了画三视图，画立体图形的三视图要循序渐进，不妨从熟悉的图形出发，对于一般的立体图要通过仔细观察和想象，再画它的三视图．要注意几何体看得见部分的轮廓线画成实线，被其他部分遮挡而看不见的部分的轮廓线化成虚线．27．（2022秋·山东威海·九年级校联考期中）如图，一个零件形如一个圆柱体削去底面圆的四分之一部分的柱体，请画出该零件的三视图【答案】见解析．【分析】根据立体图形的三视图的特点，正视图：从正面观察立体图形，正视图的宽、高与立体图形的宽、高相等；左视图：从左面看立体图形，左视图的长、高与立体图形的长、高相等；俯视图：从上往下看立体图形，俯视图的宽、长与立体图形的宽、长相等；由此即可求解．【详解】解：如图所示：【点睛】本题主要考查立体图形的三视图，理解并掌握三视图的概念，及绘图方法是解题的关键．28．（2023秋·陕西西安·七年级西安市第三中学校考阶段练习）从正面、左面、上面观察如图所示的几何体，分别画出你所看到的几何体的形状图．【答案】见解析【分析】观察图形可知，从正面看到的图形是4列，分别为1，4，1，1个正方形；从左面看到的图形是3列，分别为3，1，1个正方形；从上面看到的图形是4列，分别为1，3，1，1个正方形；据此画图即可．【详解】解：由题意得，从正面看，从左面看，从上面看，【点睛】此题考查了从不同方向看几何体，并画出图形，准确画图是解题的关键．29．（2022春·九年级单元测试）填空：如图，A是一组立方块，请说出B，C各是其什么视图．【答案】B主视图，C俯视图【分析】根据从正面看得到的图形是主视图，从上面看得到的图形是俯视图，可得答案．【详解】解：从正面看左排三层，右排一层，B是主视图；从上面看，左一个，又一个，C是俯视图，故答案为：B主视图，C俯视图．【点睛】本题考查了简单组合体的三视图，从正面看得到的图形是主视图，从上面看得到的图形是俯视图．30．（2023春·九年级单元测试）一个几何体的三视图如图所示，请你画出这个几何体的立体图形．【答案】作图见解析【分析】观察三视图可知，该几何体为两个圆柱组合而成，进而可得立体图形．【详解】解：由题意知，画几何体的立体图形如下：【点睛】本题考查了由三视图还原几何体．解题的关键在于根据三视图确定几何体的形状．。
初三中考数学试卷北师大版
1. 若a，b，c成等差数列，且a+b+c=12，b=4，则c的值为（）A. 2B. 4C. 6D. 82. 在平面直角坐标系中，点A（2，3）关于y轴的对称点为B，则点B的坐标为（）A.（-2，3）B.（2，-3）C.（-2，-3）D.（2，3）3. 已知一次函数y=kx+b（k≠0）的图象经过点（1，2）和（-1，0），则该函数的解析式为（）A. y=3x+1B. y=-3x+1C. y=3x-1D. y=-3x-14. 若等差数列{an}的公差为d，首项为a1，第n项为an，则an=（）A. a1+(n-1)dB. a1+(n+1)dC. a1-(n-1)dD. a1-(n+1)d5. 已知正方体的对角线长为3，则该正方体的表面积为（）A. 9B. 12C. 15D. 186. 在等腰三角形ABC中，AB=AC，若∠BAC=60°，则∠B=（）A. 30°B. 45°C. 60°D. 90°7. 已知函数f(x)=x^2-2x+1，则f(-1)=（）A. 0B. 1C. 2D. 38. 若二次函数y=ax^2+bx+c（a≠0）的图象开口向上，且a+b+c=0，则a的取值范围为（）A. a>0B. a<0C. a≥0D. a≤09. 已知等比数列{an}的公比为q，首项为a1，第n项为an，则an=（）A. a1q^(n-1)B. a1q^(n+1)C. a1q^(1-n)D. a1q^(n-2)10. 在平面直角坐标系中，点P（2，3）到直线x+y-5=0的距离为（）A. 1B. 2C. 3D. 411. 已知等差数列{an}的首项为a1，公差为d，则第n项an=______。
12. 在平面直角坐标系中，点A（1，2）关于x轴的对称点为B，则点B的坐标为______。
13. 若二次函数y=ax^2+bx+c（a≠0）的图象开口向上，且a+b+c=0，则a的取值范围为______。
北师大版英语中考试题与参考答案(2025年)
2025年北师大版英语中考复习试题与参考答案一、听力部分（本大题有20小题，每小题1分，共20分）1、Listen to the following dialogue and answer the question.A: Good morning! Can you help me find the English section?B: Sure, it’s on the second floor. The signs will lead you there.Question: Where does the English section of the library located?A) On the first floorB) On the second floorC) On the third floorD) On the ground floorAnswer: BExplanation: The speaker B indicates that the English section is located on the second floor, so the correct answer is B) On the second floor.2、Listen to the following short passage and choose the best answer to the question.Passage: The summer solstice is the longest day of the year in the Northern Hemisphere, occurring around June 21st. It’s a time when the sun reaches its highest point in the sky, marking the beginning of summer. Many cultures celebrate this day with festivals and traditional activities.Question: What is the significance of the summer solstice in the NorthernHemisphere?A) It’s the shortest day of the year.B) It marks the beginning of winter.C) It’s the day with the longest daylight hours.D) It’s a time to plant crops.Answer: CExplanation: The passage explicitly states that the summer solstice is the longest day of the year, which means it has the longest daylight hours. Therefore, the correct answer is C) It’s the day with the longest daylight hours.3、听力原文：W: Hello, John. How was your weekend?M: Oh, it was great! I went hiking with my friends. We climbed up a mountain and enjoyed the beautiful scenery.Questions:1.What did John do last weekend?2.How did John feel about his weekend?Answer:1.John went hiking with his friends.2.John felt great about his weekend.Explanation:This question asks about John’s weekend activities. According to the dialogue, John went hiking with his friends, so the answer is “John went hiking with his friends.” The second question asks about John’s feelings towards his weekend.The dialogue indicates that he felt great, so the answer is “John felt great about his weekend.”4、听力原文：W: Hi, Mike. Are you planning to go to the cinema this weekend?M: Yeah, I’m thinking about watching a horror movie. I haven’t seen one in a while.Questions:1.What is Mike planning to do this weekend?2.What type of movie does Mike want to watch?Answer:1.Mike is planning to go to the cinema.2.Mike wants to watch a horror movie.Explanation:This question asks about Mike’s plans for the weekend. According to the dialogue, Mike is thinking about going to the cinema, so the answer is “Mike is planning to go to the cinema.” The second question asks about the type of movie Mike wants to watch. The dialogue mentions that he wants to watch a horror movie, so the answer is “Mike wants to watch a horror movie.”5、听力材料：A: Hi, John! Are you going to the library this weekend?B: Yes, I am. I need to borrow some books for my research project.A: That’s great. I’m also going to the library. I want to find some books about history.B: Cool! Let’s meet at the library around 10:00 am.Question: What are John and the speaker planning to do this weekend?A) Go shopping.B) Go to the library.C) Watch a movie.D) Go to the park.Answer: B) Go to the library.Explanation: In the dialogue, both John and the speaker mention that they are going to the library. This indicates that their plan for the weekend is to go to the library.6、听力材料：A: How was your day, Sarah?B: It was good, thanks. I had an English class in the morning, and then I went to the gym in the afternoon.A: That sounds like a busy day. Did you enjoy the gym?B: Yes, I did. The instructor was really helpful, and I met some new friends there.A: That’s nice. I should start going to the gym more often.B: You should! It’s a great way to stay healthy and meet new people.Question: What did Sarah do in the morning?A) She went to the gym.B) She had an English class.C) She went shopping.D) She watched a movie.Answer: B) She had an English class.Explanation: In the dialogue, Sarah mentions that she had an English class in the morning. This directly answers the question about what she did in the morning.7.What does the woman suggest the man do?A) Buy a new car.B) Take the bus.C) Repair his car.D) Sell his car.Answer: CExplanation: The correct answer is C because in the conversation, the woman advises the man that he should get his car fixed instead of buying a new one or taking other transportation options.8.How long has the man’s car been broken?A) One day.B) Two days.C) Three days.D) Four days.Answer: BExplanation: The correct answer is B. During their discussion, the manmentions that his vehicle has not been working for the past two days, which aligns with option B.9.You are listening to a conversation between two friends, Alex and Jamie. They are discussing their plans for the weekend.Alex: “Hey Jamie, do you have any plans for the weekend?”Jamie: “Well, I was thinking of going hiking. How about you?”Alex: “That sounds great! I haven’t been hiking in a while. What trail are you thinking of?”Jamie: “I was thinking of the Blue Ridge Trail. It’s not too far from here and offers some amazing views.”Alex: “Oh, I’ve heard about that trail. It’s supposed to be beautiful this time of year. I’m in!”Question: What is Alex’s response to Jamie’s suggestion?A) “I’m not interested in hiking.”B) “I’ve already made other plans.”C) “That sounds great! I haven’t been hiking in a while.”D) “I don’t know anything about hiking.”Answer: C) “That sounds great! I haven’t been hiking in a while.”Explanation: The correct answer is C because Alex responds positively to Jamie’s suggestion of going hiking and mentions that they haven’t been hiking in a while, which implies that they are interested in the idea.10.You are listening to a radio announcement about a local music festival.Announcer: “This weekend, the town of Maplewood is hosting the Maplewood Music Festival! There will be performances by local bands and international stars. The festival starts at 10 am on Saturday and runs until midnight. admission is free, but there will be food and drink available for purchase. For more information, visit our website at or call 555-1234.”Question: What time does the Maplewood Music Festival start on Saturday?A) 8 amB) 10 amC) 12 pmD) 2 pmAnswer: B) 10 amExplanation: The correct answer is B because the radio announcement clearly states that the Maplewood Music Festival starts at 10 am on Saturday.11、You will now hear a dialogue between a librarian and a student who is looking for a book on ancient history. Listen carefully and then choose the correct answer to the question you hear afterwards.Answer: This part is hypothetical, as the audio isn’t provided. In a real exam setting, students would listen and select the appropriate choice.Explanation: Since we don’t have the audio, we can’t provide a specific answer or explanation here. Normally, after listening, the student should be able to identify whether the book was found, what section it was in, or any otherdetail pertinent to the dialogue.12、Next, listen to a conversation between two friends discussing their weekend plans. One of them suggests going to a movie while the other proposes a picnic. Pay attention to which activity they ultimately decide on and why.Answer: Again, without the audio, we cannot give a precise answer. However, let’s assume the friends decide on the picnic because the weather forecast predicts sunny weather.Explanation: The dialogue likely included information about the weather conditions over the weekend, influencing their decision to opt for outdoor activities rather than staying indoors to watch a movie.13.Listen to the conversation between two students, and answer the question. Student A: Hey, do you know what the homework for tomorrow is?Student B: Yea h, it’s to read Chapter 4 in our textbook and write a summary.Question: What is the homework for tomorrow?A) To read Chapter 4 in the textbook.B) To write a summary of the book.C) To read Chapter 4 and write a summary.D) None of the above.Answer: C) To read Chapter 4 and write a summary.Explanation: The conversation clearly states that the homework for tomorrow is to read Chapter 4 in the textbook and write a summary, which is option C.14.Listen to the dialogue between a teacher and a student, and answer thequestion.Teacher: How was your trip to the science museum?Student: It was amazing! We got to see all sorts of cool exhibits, and I even got to conduct a little experiment.Question: What did the student do during their trip to the science museum?A) Watch movies.B) Conduct an experiment.C) Buy souvenirs.D) Attend a lecture.Answer: B) Conduct an experiment.Explanation: The student explicitly mentions conducting a little experiment during their trip to the science museum, which is option B.15、What is the main topic of the conversation between the student and the librarian?A)The process of checking out booksB)The rules of the libraryC) A discussion about a particular bookD)The opening hours of the libraryAnswer: B) The rules of the libraryExplanation: In the conversation, the librarian explains to the student the rules regarding the use of books within the library and borrowing procedures. This indicates that the primary focus was on library rules.16、According to the dialogue, what time does the library close on weekdays?A)5:00 PMB)6:00 PMC)7:00 PMD)8:00 PMAnswer: D) 8:00 PMExplanation: During the dialogue, the librarian mentions that the closing time for the library on weekdays is at 8:00 PM. The other options were not mentioned as closing times during the conversation.17.You are listening to a conversation between two students, Tom and Lucy, discussing their weekend plans.Tom: Hey Lucy, what are you doing this weekend?Lucy: I’m thinking of going hiking in the mountains. How about you, Tom? Tom: That sounds great! I was actually planning to visit the city museum. I heard it has some interesting exhibits.Lucy: Wow, I should check it out too. Maybe we can go together on Sunday.Question: What are Tom’s weekend plans?A) Going hiking in the mountains.B) Visiting the city museum.C) Attending a sports event.D) Going to a movie.Answer: BExplanation: Tom mentions that he is planning to visit the city museum, which indicates that his weekend plan is B) Visiting the city museum.18.You are listening to a short dialogue between a teacher and a student, Alice, discussing her project.Teacher: Alice, how are you progressing on your science project?Alice: I’m almost finished, Mr.Smith. I’ve collected all the data and now I’m working on the analysis.Teacher: That’s good to hear. Remember to include a clear introduction and conclusion in your report.Alice: Yes, I will. And I’m also planning to include some graphs to illustrate the data.Question: What is Alice currently working on?A) Writing a conclusion.B) Collecting more data.C) Analyzing the data.D) Preparing a presentation.Answer: CExplanation: Alice states that she is “working on the analysis,” which means she is currently in the process of analyzing the data, making option C) Analyzing the data the correct answer.19、What does the woman suggest the man should do?A. He should take a break from studying.B. He should continue studying hard.C. He should go to the movies with her.Answer: C. He should go to the movies with her.Explanation: In the conversation, the woman notices that the man has been studying for a long time and suggests he take a break and join her at the cinema. This indicates she’s inviting him to relax rather than keep working.20、Why can’t the ma n accept the invitation right away?A. He doesn’t want to go to the movies.B. He has more studying to complete.C. He already made plans with someone else.Answer: B. He has more studying to complete.Explanation: The man responds by saying he needs to finish his homework before he can consider taking a break, implying that he has responsibilities that need to be taken care of first before he can accept the invitation to the movies.二、阅读理解（30分）Reading ComprehensionPassage:The Great Wall of China is one of the most famous landmarks in the world. It was built over several centuries, starting in the 7th century BC. The wall’s primary purpose was to protect the Chinese empire from invasions by nomadic tribes from the north. It stretches over 13,000 miles and passes through various provinces in northern China.The construction of the Great Wall involved millions of workers, including soldiers, peasants, and artisans. It was built using a combination of materials, including bricks, stones, wood, and earth. The wall is known for its zigzagging design, which allowed it to adapt to the rugged terrain of the mountains.Over the years, the Great Wall has faced many challenges, including natural erosion and human destruction. However, efforts have been made to preserve and restore this historical marvel. Today, the Great Wall attracts millions of tourists from around the world each year, offering them a glimpse into ancient Chinese history and culture.Questions:1.What is the main purpose of the Great Wall of China?A) To serve as a tourist attraction.B) To protect the Chinese empire from invasions.C) To connect different provinces in China.D) To showcase the architectural skills of ancient China.2.What is the main material used in the construction of the Great Wall?A) Only bricks.B) Only stones.C) A combination of bricks, stones, wood, and earth.D) Only wood and earth.3.Why is the zigzagging design of the Great Wall significant?A) It made the wall more visually appealing.B) It was a result of the lack of planning.C) It allowed the wall to adapt to the mountainous terrain.D) It was a sign of military strategy.Answers:1.B) To protect the Chinese empire from invasions.2.C) A combination of bricks, stones, wood, and earth.3.C) It allowed the wall to adapt to the mountainous terrain.三、完型填空（15分）Section 3: Cloze TestRead the following passage and choose the best word for each blank from the options given below.In the small town of Willow Creek, the residents had always looked forward to the annual Willow Creek Festival. The festival was a time for celebration, where people from all over the country would gather to enjoy music, food, and various cultural activities. This year, however, the festival was threatened by a (1)___________situation.(1)a.unusualb.pleasantc.ordinaryd.dangerousThe problem was a (2)___________drought that had lasted for several months. Thelack of rain had affected both the crops and the water supply, leading to(3)___________concerns among the townspeople.(3)a.littleb.fewc.muchd.manyThe town’s mayor, Mr.Thompson, held an emergency meeting to discuss the situation. He proposed several (4)___________to help alleviate the drought, including asking for water donations from neighboring towns and implementing strict water-saving measures.(4)a.solutionsb.decisionsc.rulesd.suggestionsDespite the challenges, the festival organizers were determined not to cancel the event. They (5)___________creative ways to incorporate water conservation into the festival activities.(5)a.thoughtb.foundc.came up withd.createdAnswer Key:1.a. unusual2.b. severe3.c. much4.a. solutions5.c. came up with四、语法填空题（本大题有10小题，每小题1分，共10分）1、John_______(be) very busy recently because he’s been working on his new book.A. has beenB. isC. wasD. will beAnswer: A. has beenExplanation: The correct answer is “has been” because the sentence indicates a continuous action that started in the past and is still ongoing in the present. The phrase “recently” suggests a time frame that includes the present.2、If I_______(know) her, I would have invited her to the party.A. had knownB. knewC. knowD. am knowingAnswer: A. had knownExplanation: The correct answer is “had known” because the sentence is in the conditional perfect tense, which is used to express a past condition and its hypothetical result in the past. The structure “if I had + past participle” is used to talk about a past situation that did not happen.3、In the__________(1) __________, the students were actively participating in the science fair.A. momentB. timeC. secondD. minuteAnswer: AExplanation: The correct word to use here is “moment,” which refers to a short period of time, often one that is significant or memorable. The phrase “at that moment” implies a specific point in time during which the action (students participating in the science fair) was occurring.4、If you__________(1)__________to be honest, you should not have lied to your friend.A. wantB. would likeC. had wantedD. have wantedAnswer: CExplanation: The correct answer is “had wanted,” which is the past perfect tense. This tense is used to express a desire that was true at a past time, but did not come to pass. The sentence implies that the speaker is suggesting that the person should have wanted to be honest at some point in the past, which wouldhave prevented the lie from occurring.5、In the___________of the school, there is a beautiful garden where students often___________their breaks.A. middle, spendB. center, takeC. middle, haveD. center, makeAnswer: BExplanation: The correct phrase to describe the central part of a school is “the center of the school.” The correct verb to describe spending time during a break is “take,” as in “take their breaks.” Therefore, the correct answer is “B. center, take.”6、The___________of the book was so interesting that I couldn’t put it down until the___________was over.A. story, chapterB. title, endC. author, bookD. cover, summaryAnswer: BExp lanation: The “title” of a book refers to its name. The phrase “until the end” indicates the time when the book was finished. The other options do not fit the context as well. Therefore, the correct answer is “B. title, end.”7.In the__________(7) __________, the students are encouraged to speak English actively.Answer: 7. pastExplanation: The correct word to fill in the blank is “past” because the sentence is referring to a time when the students were encouraged to speak English actively, which is in the past. The phrase “in the past” is a common English expression used to talk about events or actions that happened before the present.8.If__________(8)__________you need help with your homework, don’t hesitate to ask the teacher.Answer: 8. youExplanation: The correct word to fill in the blank is “you” because the sentence is expressing a conditional statement. The structure “If + subject + verb” is used to introduce a condition, and “you” is the subject that would be performing the action of asking for help if the condition were met.9.In the 9 morning, we had a surprise visit from our old friend.A. lastB. nextC. firstD. pastAnswer: CExplanation: The correct answer is “first” because it indicates the first morning of the school year or a specific event, which fits the context of a surprise visit.10.If you 10 your homework now, you can watch TV later.A. finishedB. finishC. will finishD. are finishingAnswer: BExplanation: The correct answer is “finish” because the sentence is talking about a present condition that, if met, will allow the action of watching TV later. The simple present tense is used to express a general truth or a condition in the present.五、简答题（本大题有5小题，每小题2分，共10分）1、What are the main differences between a singular noun and a plural noun in English grammar?答案：1.Singular nouns refer to one person, place, thing, or idea, while plural nouns refer to more than one of the same person, place, thing, or idea.2.Singular nouns typically do not end with an ‘s’ or any other pluralizing suffix, whereas plural nouns often add an ‘s’, ‘es’, or another suffix to indicate plurality.3.The verb agreement is different; singular nouns require a singular verb, and plural nouns require a plural verb.解析：This question asks the student to identify and explain the key differences between singular and plural nouns. The answer outlines three main differences: the quantity they represent, the absence of pluralization in singular nouns,and the effect on verb agreement.3、What are the main differences between a present perfect tense and a past perfect tense?答案：The main differences between a present perfect tense and a past perfect tense are as follows:1.Time reference:•Present perfect tense: It is used to talk about actions or states that started in the past and continue to the present or have a present result.•Past perfect tense: It is used to describe an action that was completed before another past action.2.Time adverbs:•Pres ent perfect tense: It often uses time adverbs like “already,” “yet,”“just,” “recently,” etc.•Past perfect tense: It often uses time adverbs like “before,” “after,”“by,” “before then,” etc.3.Verb form:•Present perfect tense: The verb is formed with “have/has” + past participle.•Past perfect tense: The verb is formed with “had” + past participle.解析：This question tests the understanding of the present perfect and past perfect tenses. The answer outlines the key differences in terms of timereference, time adverbs, and verb forms, which are important aspects of these tenses in English grammar.4、How can you use the passive voice to express an action in which the subject is the recipient of the action?答案：To express an action where the subject is the recipient of the action using the passive voice, you can follow these steps:1.Identify the subject that is receiving the action.2.Change the subject to the object of the action.e the passive form of the verb, which is “be” (in its appropriate form) + past participle.For example:Active voice: “The students are teaching the lesson.”Passive voice: “The lesson is being taught by the students.”解析：This question examines the use of the passive voice to emphasize the recipient of the action rather than the doer. The answer provides a clear explanation of how to transform an active sentence into a passive one, highlighting the importance of identifying the subject as the recipient and using the correct form of the “be” verb followed by the past participle of the main verb.5、What are the main differences between present perfect tense and presentperfect continuous tense in English grammar?Answer: The main differences between present perfect tense and present perfect continuous tense in English grammar are as follows:1.Time reference:•Present perfect tense is used to express an action that started in the past and has a connection with the present.•Present perfect continuous tense is used to express an ongoing action that started in the past and is still continuing.2.Frequency:•Present perfect tense does not indicate frequency, but rather a single occurrence or a repeated action.•Present perfect continuous tense indicates an action that has been going on for a certain period of time, showing a sense of duration.3.Aspect:•Present perfect tense is used to focus on the result or the state of the action.•Present perfect continuous tense emphasizes the ongoing nature of the action.4.Time adverbs:•Present perfect tense is often accompanied by time adverbs like ever, never, just, already, yet, etc.•Present perfect continuous tense is often accompanied by time adverbs like for, since, and for + a period of time.5.Negative and interrogative forms:•The negative form of p resent perfect tense is formed by adding “not”after the main verb.•The negative form of present perfect continuous tense is formed by adding “not” before the verb “have” or “has” followed by the pastparticiple form of the main verb.Explanation: These differences highlight the nuances in using present perfect tense and present perfect continuous tense in English grammar. It is essential to understand these differences to use the correct tense in different contexts.六、书面表达题（15分）WritingSuppose you are going to visit a foreign friend, and you are making a travel plan. Write an email to your friend, including the following points:1.The destination and reasons for the visit.2.The dates and duration of the trip.3.The activities you plan to do during your visit.4.Any special requests or arrangements you need.You should write about 100 words on the ANSWER SHEET 2.Note: Do not use your real name in your writing. You may write your own address.Answer:Dear [Frien d’s Name],I hope this email finds you well. I am thrilled to hear that you’re going to visit us soon. I’ve made a travel plan for our visit, and I’d like to share it with you.We are planning to visit Paris, France. The main reasons for the visit are to explore the beautiful city and enjoy the rich culture there. The trip will last for two weeks, from July 15th to July 29th.During our visit, we plan to visit the Eiffel Tower, Louvre Museum, and Notre-Dame Cathedral. We also want to try some delicious French cuisine and enjoy a romantic evening by the Seine River.Best regards,[Your Name]Explanation:This writing task requires you to write an email to your friend, making a travel plan for your upcoming visit to Paris, France. The email should include the destination, reasons for the visit, dates and duration of the trip, and activities you plan to do during your visit. Additionally, you can mention any special requests or arrangements you need.The answer provided is a well-structured email that covers all the required points. It starts with a greeting and an expression of excitement to visit the friend. Then, it clearly states the destination (Paris, France) and the reasons for the visit. The dates and duration of the trip are mentioned, followed bythe activities planned. Finally, the email concludes with a request for any special requests or assistance, and a closing statement.The answer also maintains a friendly and polite tone throughout, which is appropriate for a personal email.。
2024年中考数学模拟考试试卷-带答案(北师大版)
2024年中考数学模拟考试试卷-带答案（北师大版）（满分：150分；考试时间：120分钟）学校:___________班级：___________姓名：___________考号：___________一.选择题：本题共10小题，每小题4分，共40分．每小题只有一个选项符合题目要求．1.如图中六棱柱的左视图是（）2.中华鲟是地球上最古老的脊椎动物之一，距今约有140000000年的历史，是国家一级保护动物和长江珍稀特有鱼类保护的旗舰型物种．3月28日是中华鲟保护日，有关部门进行放流活动，实现鱼类物种的延续并对野生资源形成持续补充．将140000000用科学记数法表示应为（）A.14x107B.1.4x108C.0.14x109D.1.4x1093.已知直线a∥b，将一块含30°角的直角三角板ABC按如图所示的方式放置，其中∠A=30°，∠ACB=90°，若∠1=45°，则∠2的度数为（）A.30°B.25°C.20°D.15°4.下列运算错误的是( )A.(a2)³=a6B.a7÷a³=a4C.a³·a6=a9D.a2+a3=a55.下列运动项目图标中，既是轴对称图形又是中心对称图形的是( )6.若点（-2，y1)、(-1，y2)、(3，y3)在反比例函数y=kx(k<0)上，则y1，y2，y3的大小关系是( )A.y1<y2<y3B.y3<y2<y1C.y2<y1<y3D.y3<y1<y27.为了缓解中考备考压力，增加学习兴趣，李老师带领同学们玩转盘游戏．如图为两个转盘，转盘一被四等分，分别写有汉字"中""考""必""胜"；转盘二被三等分，分别写有汉字"我""必""胜"，将两个转盘转动一次（当指针指向区域分界线时，不作数，重新转动），若得到"必""胜"两字，则获得游戏一等奖，请求出获得游戏等奖的概率（）A.12B.14C.16D.1129.如图，在半径为10的扇形AOB中，∠AOB=90°，C是AB上一点，CD⊥OA，CE⊥OB，垂足分别为D、E．若∠CDE=36°，则图中阴影部分的面积为（）A.10πB.9πC.8πD.6π9.如图，在△ABC中，AB=AC，以点B为圆心，适当长为半径画弧，交BA于点M，交BC于点N，分别以点M，N为圆心，大于12MN的长为半径画弧，两弧在△ABC的内部相交于点P，画射线BP，交AC于点D，若AD=BD，则∠ADB的度数为( )A.36°B.54°C.72°D.108°10.定义：将平面直角坐标系中中横坐标与纵坐标均为整数的点叫作格点，如（-2，1)，(2，0）等均为格点．如图，在平面直角坐标系xOy中，直线l：y=a（x+2）(a>0）与x轴交于点A，与抛物线E:y=ax2(a>0）交于B，C两点（B在C的左边）.直线l与抛物线E所围成的封闭图形即阴影部分（不包含边界）中的格点数恰好是26个，则a的取值范围是（）A.132＜a≤7 B.193＜a≤203C.132＜a≤203或a=7 D.a=7二.填空题：本题共6小题，每小题4分，共24分．直接填写答案．11.因式分解：x2+6x+9= .12.一个不透明的盒子中装有若干个红球和6个白球，这些球除颜色外均相同．经多次摸球试验后发现，摸到白球的频率稳定在0.25左右，则盒子中红球的个数约为.13.若√7＜a<√10，且a为整数，则a的值为.14.如图，正八边形ABCDEFGH的边长为4，以顶点A为圆心，AB的长为半径画圆，则阴影部分的面积为（结果保留π）.15.如图，已知在Rt△ABC中，∠C=90°，AC=3，BC=4，分别将Rt△ABC的三边分别沿箭头方向平移2个单位长度并适当延长，得到△A1B1C1，则△A1B1C1的面积为。
北师大版物理中考试卷与参考答案(2025年)
2025年北师大版物理中考自测试卷(答案在后面)一、单项选择题（本大题有10小题，每小题3分，共30分）1、（）下列关于速度的描述中，正确的是：A、速度表示物体位置变化的快慢B、速度表示物体运动的方向C、速度表示物体在单位时间内移动的距离D、速度表示物体在单位时间内移动的位移2、（）一个物体以10m/s的速度向东运动，3秒后物体的位移是多少？A、30mB、15mC、-30mD、-15m3、在下列哪种情况下，物体的运动状态没有发生改变？A. 物体沿直线加速运动B. 物体沿直线减速运动C. 物体做匀速圆周运动D. 物体静止不动4、当一个凸透镜的焦距为15厘米时，如果将一个物体放置在离凸透镜20厘米的位置上，那么所成像的性质是什么？A. 倒立缩小实像B. 倒立放大实像C. 正立放大虚像D. 正立缩小虚像5、题干：在下列关于光现象的描述中，正确的是（）A、光的折射现象是指光线从一种介质进入另一种介质时，传播方向发生改变的现象。
B、光的反射现象是指光线遇到光滑表面时，反射光线与入射光线在法线两侧，且入射角等于反射角。
C、光在同种介质中沿直线传播，这是因为光波的波动性质。
D、光从空气进入水中时，光速减小，波长也减小。
6、题干：关于力的作用效果，以下说法正确的是（）A、力的作用效果包括改变物体的形状和运动状态。
B、力的大小与物体的质量成正比。
C、力的作用效果与力的方向无关。
D、物体受到的合力越大，物体的运动状态改变得越快。
7、一个物体在水平面上受到一个水平推力，如果推力的大小不变，物体从静止开始运动，那么以下说法正确的是：A、物体的速度将随着时间的增加而减小B、物体的加速度将随着时间的增加而减小C、物体的位移将随着时间的增加而减小D、物体的运动状态将保持不变8、在下列哪种情况下，物体的机械能守恒？A、物体在水平面上做匀速直线运动B、物体在空中做自由落体运动，忽略空气阻力C、物体在光滑斜面上滑动，忽略摩擦力D、物体在水中匀速下沉9、一个物体以初速度(v0)水平抛出，忽略空气阻力，当它落地时，它的水平位移(d)取决于什么因素？A. 物体的质量B. 抛出的高度和初速度C. 抛出的角度D. 物体的形状二、多项选择题（本大题有2小题，每小题3分，共6分）1、题干：以下关于力的说法正确的是：A、力是物体对物体的作用，物体间不接触也可以产生力B、物体受到的力越大，物体的运动状态改变越快C、力可以改变物体的形状，但不能改变物体的运动状态D、牛顿第一定律揭示了力与运动状态的关系2、题干：关于能量守恒定律，以下说法正确的是：A、能量不能被创造或消灭，只能从一种形式转化为另一种形式B、在一个孤立系统中，能量总量始终保持不变C、能量守恒定律是物理学中最基本的定律之一D、能量守恒定律适用于所有物理过程，包括生物化学过程三、填空题（本大题有5小题，每小题4分，共20分）1、一物体沿直线做匀加速运动，若在第2秒末的速度为6m/s，在第4秒末的速度达到10m/s，则该物体的加速度大小为______ m/s²。
北师大版中考英语试题与参考答案
北师大版中考英语试题与参考答案一、选择题1.下列单词中，与划线部分发音相同的单词是A. teacherB. fatherC. gameD. late【参考答案】B2.下列句子中，划线部分单词的正确形式是A. I didn’t do anything wrong.B. He is taller than his brother.C. They have finished their homework.D. I can’t hear you clearly.【参考答案】A3.根据题意，将下列句子重新排列顺序正确的是①She is a good teacher.②I like her very much.③Her classes are interesting.A. ②①③B. ①③②C. ③①②D. ①②③【参考答案】B4.下列各组单词中，有一个单词与其他单词不属于同一类，找出不同类的单词A. cat, dog, fish, birdB. book, pen, chair, deskC. sun, moon, star, cloudD. brother, sister, mother, father【参考答案】D5.根据下列句子，选择恰当的答案Sarah: Hi, how are you?Jim: I’m fine, thank you. But I’m a little tired because I stayed up late last night.Sarah: Why did you stay up late?Jim: I had to finish my homework.A. He stayed up late because he was bored.B. He stayed up late because he had to finish his homework.C. He stayed up late because he was tired.D. He stayed up late because he wanted to watch TV.【参考答案】B6.根据下列图表，回答问题【参考答案】(1)50 yuan(2)30 minutes(3)Swimming(4)On weekends.二、完形填空阅读下面短文，从短文后各题所给的A、B、C、D四个选项中，选出可以填入空白处的最佳选项。
北师大版中考物理试卷
北师大版中考物理试卷一、单项选择题（每题3分，共30分）1. 下列数据最接近实际的是（）A. 一个鸡蛋的质量约为500g。
B. 人体感觉舒适的温度约为37°C。
C. 一张试卷的厚度约为1mm。
D. 中学生正常步行的速度约为1.1m/s。
2. 关于声现象，下列说法正确的是（）A. 声音在真空中传播速度最快。
B. “引吭高歌”中的“高”是指音调高。
C. 听诊器能增大心脏跳动的幅度，使响度增大。
D. 用超声波能粉碎人体内的“小石头”，说明声波具有能量。
3. 下列光现象中，属于光的反射的是（）A. 小孔成像。
B. 水中倒影。
C. 日食月食。
D. 海市蜃楼。
4. 下列物态变化中，属于吸热过程的是（）A. 春天，冰雪消融。
B. 夏天，雾绕山峦。
C. 秋天，霜打枝头。
D. 冬天，千里冰封。
5. 下列关于力的说法中，正确的是（）A. 力只能使物体发生形变。
B. 力是维持物体运动的原因。
C. 重力的方向总是垂直向下的。
D. 相互接触的物体之间不一定有力的作用。
6. 关于家庭电路和安全用电，下列说法正确的是（）A. 家庭电路中，空气开关跳闸一定是发生了短路。
B. 家庭电路中，控制用电器的开关应接在火线和用电器之间。
C. 使用试电笔时，手指不能接触笔尾金属体。
D. 发现有人触电时，应立即用手将触电者拉开。
7. 如图1所示，将同一物体分别沿光滑的斜面AB、AC以相同的速度从底部匀速拉到顶点A，已知AB > AC，施加的力分别为F1、F2，拉力做的功分别为W1、W2，拉力做功的功率分别为P1、P2，则（）A. F1 < F2，W1 = W2，P1 < P2.B. F1 > F2，W1 > W2，P1 > P2.C. F1 < F2，W1 < W2，P1 < P2.D. F1 < F2，W1 = W2，P1 > P2.<插入图1>。
8. 如图2所示，闭合开关S后，发现电灯L不亮，且保险丝没有熔断。
初三中考北师大版数学试卷
1. 下列各数中，有理数是（）A. √2B. πC. √-1D. 3.142. 已知a=5，b=-3，那么a²-b²的值为（）A. 4B. 14C. 16D. 223. 在△ABC中，∠A=45°，∠B=60°，则∠C的度数为（）A. 75°B. 90°C. 105°D. 120°4. 下列各图中，能组成三角形的是（）（图略）A. 图1B. 图2C. 图3D. 图45. 已知函数y=2x-3，当x=4时，y的值为（）A. 5B. 7C. 9D. 116. 若a、b是方程x²-3x+2=0的两根，则a+b的值为（）A. 2B. 3C. 4D. 57. 下列各式中，正确的是（）A. (a+b)²=a²+2ab+b²B. (a-b)²=a²-2ab+b²C. (a+b)²=a²-2ab+b²D. (a-b)²=a²+2ab-b²8. 已知x²-4x+4=0，则x的值为（）A. 2B. 4C. -2D. -49. 下列各数中，无理数是（）A. √9B. √16C. √-4D. √2510. 在△ABC中，若a=5，b=7，c=8，则△ABC的面积S为（）A. 14B. 21C. 28D. 3511. 若x=2，则x²-x+1的值为______。
12. 在△ABC中，若∠A=60°，∠B=45°，则∠C的度数为______。
13. 已知函数y=3x+2，当x=1时，y的值为______。
14. 若a、b是方程x²-5x+6=0的两根，则a²+b²的值为______。
15. 若（a+b）²=25，且a-b=5，则a的值为______。
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中考真题：从三国鼎立到南北朝对峙
（2015·山东济宁市B）2．认知和探究历史地图，
从中提取有效信息，是学习和研究历史的重要方法。
右图反映的是（）
A．巨鹿之战
B．官渡之战
C．赤壁之战
D．淝水之战
（2015·广东深圳市）5．图1中，序号①②③所代表的政权名称依次是（）
图1
A．魏、吴、蜀
B．魏、蜀、吴
C．吴、蜀、魏
D．蜀、吴、魏
（2015·广西玉林）4．右边的示意图是（）
A．春秋争霸图
B．赤壁之战图
C．人口南迁图
D．三国鼎立图
（2015·湖北襄阳市）11．著名典故“三顾茅庐”源自东汉末年。
这位曾住在茅庐里的历史人物是（）
A．曹操
B．刘备
C．诸葛亮
D．孙权
（2015·湖南郴州）4．阅读右图，找出三国鼎
立时期魏国的建立者及其都城搭配正确的一项
（）
A．曹操洛阳
B．刘备成都
C．孙权建业
D．曹丕洛阳
（2015·黑龙江绥化）2．“老骥伏枥，志在千里；烈士暮年，壮心不已”，这首诗的作者自比“烈士”，他是（）
A．项羽
B．诸葛亮
C．刘备
D．曹操
（2015·湖北宜昌市）4．东汉末年，地方割据势力长期混战，其中为魏、蜀汉、吴三国鼎立奠定基础的战争是（）
A．巨鹿之战
B．官渡之战
C．赤壁之战
D．淝水之战
（2015•山东省菏泽市）3．对三国两晋南北朝时期历史发展特征概括不正确的是（）A．社会发展陷入停滞倒退
B．科学技术取得了显著进步
C．南方经济有了较快发展
D．民族融合的趋势不断加强
（2015•山东济南）2．某同学搜集到以下四幅图片，请帮他拟定一个正确的主题（）A．中华文明的起源
B．统同一国家的建立
C．政权分立和民族融合
D．繁荣开放的社会。