学而思施焕平老师《透视一摸,直击中考》讲义

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中考数学全景透视九年级一轮复习图形的平移与旋转PPT教案

中考数学全景透视九年级一轮复习图形的平移与旋转PPT教案
:1平移方向;2平移距离. 2.平移只改变图形的位置个平面图形绕着平面内某一点 O 转动一个 角度,就叫做图形的旋转,点 O 叫做旋转中心,转动 的角叫做旋转角.如果图形上的点 P 经过旋转变为点 P′,那么这两个点叫做这个旋转的对应点.
(3)△A1B1C1 和△D1E1F1 组成的图形是轴对称图 形吗?如果是,请直接如图所示; (△D1E1F1 组成的图形是轴对称图 形,对称轴所在直线的解析式为 y=个图形是全等形;平移前后的两个 图形上的对应点之间的距离为平移的距离;平移前后 的两个图2(2014·梅州)如图,把△ABC 绕点 C 按顺时针 方向旋转 35°,得到△A′B′C,A′B′交 AC 于点 D,若 ∠A′DC=90°,C 为旋转中心旋转 180°,得到 △A1B1C,请画出△A1B1C 的图形.
(2)平 移 △ABC , 使 点 A 的 对 应 点 A2 坐 标 为 (-2,-6),请画出平移后对应的△A2B2C2 的图形.
(3)若将△A1B1C 绕某一点旋转可得到△A2B2C2,和旋转作图,可以先 求出变换后三角形三1B2 和 A1A2 的交点,由图可 知旋1.下图是 2016 年夏季奥运会会徽,经过一次平 移得到的图形是 ABC 中,AB=BC,将 等腰△ABC 沿射线 BC 向右平移到△DCE 的位置,连 接 AD,BD,则下列结论:①AD=BC;②BD,AC 互 相平分;③BD,AC 互相垂直;④S 四边形 ABCD=S 四边形 ACED. 其中正确的是( )
【点拨】如图,设 AC 交 A′B′于点 H,∵∠A=45°, ∠D=90°,∴△A′HA 是等腰直角三角形.设 AA′=x, 则阴影部分的底 A′H=x,高 A′D=12-x,
∵A′形,∴重叠部分的面 积为x·(12-x)=32,∴x=4或8,即AA′图,在 Rt△ABC 中,∠ACB= 90°,∠ABC=30°,将△ABC 绕点 C 顺时针旋转至 △A′B′C,使得点 A′恰好落在 AB 上,则旋转角度为 ()

七年级美术《透视》课件浙教版

七年级美术《透视》课件浙教版

七年级美术《透视》课件浙教版一、教学内容本节课我们将学习浙教版七年级美术教材中《透视》一章节的内容。

详细内容包括了解什么是透视,掌握一点透视和两点透视的基本原理,学习如何在绘画中运用透视技巧,以及欣赏一些经典的透视作品。

二、教学目标1. 让学生了解并掌握透视的基本概念和原理。

2. 培养学生在绘画中运用透视技巧的能力,提高绘画水平。

3. 培养学生的审美能力,激发学生对美术创作的兴趣。

三、教学难点与重点教学难点:透视原理的理解和运用。

教学重点:一点透视和两点透视的绘画技巧。

四、教具与学具准备1. 教具:透视原理图、经典透视作品、画纸、画笔、颜料等。

2. 学具:画纸、画笔、颜料、橡皮、直尺等。

五、教学过程1. 导入:通过展示生活中的透视现象,如铁轨、街道等,引导学生思考什么是透视,激发学生的学习兴趣。

2. 知识讲解:讲解透视的基本概念,介绍一点透视和两点透视的原理,配合透视原理图进行说明。

3. 实践示范:现场示范如何运用透视技巧进行绘画,边示范边讲解,让学生直观地了解透视在绘画中的运用。

4. 随堂练习:学生根据所学知识,进行一点透视和两点透视的绘画练习,教师巡回指导。

5. 作品欣赏:展示经典透视作品,引导学生从审美角度分析作品,培养学生的审美能力。

六、板书设计1. 透视的基本概念2. 一点透视和两点透视的原理3. 透视在绘画中的运用4. 经典透视作品欣赏七、作业设计1. 作业题目:运用透视技巧,创作一幅风景画。

2. 答案:作业答案见附件。

八、课后反思及拓展延伸1. 反思:本节课学生对透视原理的理解程度,以及在实际绘画中的应用情况。

重点和难点解析1. 教学难点与重点的设定2. 教学过程中的实践示范和随堂练习3. 板书设计4. 作业设计5. 课后反思及拓展延伸一、教学难点与重点的设定重点:透视原理的理解和运用,特别是对一点透视和两点透视的掌握。

难点:如何让学生在实际绘画中灵活运用透视技巧,将理论应用于实践。

中考数学全景透视复习第07讲一元二次方程省公开课获奖课件市赛课比赛一等奖课件

中考数学全景透视复习第07讲一元二次方程省公开课获奖课件市赛课比赛一等奖课件

的判别式为 b2-4ac,一般用符号 Δ 表示.
(1)b2-4ac>0⇔方程有两个不相等的实数根,即
x1,2=-b±
b2-4a⇔ 方 程 有 两 个 相 等 的 实 数 根 , 即 x1=x2=-2ba;
(3)b2-4ac<0⇔方程没有实数根. 温馨提示: 一元一次方程没有根的判别式,因此,在逆用判 别式时,一定要保证二次项系数不等于零.
的根为
x1


f e

x2=-mn .
温馨提示: 解一元二次方程时,要根据方程的特点灵活选择 合适的方法,一般顺序为:直接开平方法、因式分解 法、公式法、配方法.公式法和配方法可以解所有判别 式大于或等于0的一元二次方程.
考点三 一元二次方程根的判别式
关于 x 的一元二次方程 ax2+bx+c=0(a≠0)的根
系,然后列方程求解.
考点一 一元二次方程的解
例 1(2014·陕西)若 x=-2 是关于 x 的一元二次方
程 x2-52ax+a2=0 的一个根,则 a 的值为(
)
A.1 或 4
B.-1 或-4
C.-1 或 4
D.1 或 -4
【点拨】把 x=-2 代入 x2-52ax+a2=0,得(-2)2 -52a·(-2)+a2=0,解得 a1=-1,a2=-4.故选 B.
1.已知 1 是关于 x 的一元二次方程(m-1)x2+x
+1=0 的一个根,则 m 的值是( B )
A.1
B.-1
C.0
D.无法确定
解析:把 x=1 代入(m-1)x2+x+1=0,
得(m-1)+1+1=0,解得 m=-1,
此时 m-1=-2≠0,∴m=-1.故选 B.

初三中考总复习——图形变换

初三中考总复习——图形变换

初三中考总复习一一图形变换西城外国语学校袁慎鹏图形变换是对几何图形认识方法上的一种改变.通过平移、轴对称、旋转变换达到复杂图形简单化、一般图形特殊化,分散条件集中化的目的.从图形变换的角度思考问题,可以整体把握图形的性质,特别是可以帮助我们从更高的层次理解平行线、截长补短、倍长中线等常用辅助线的作用,使问题解决更加简洁明确.当图形运动变化的时候,从运动变换的角度更容易发现不变量和特殊图形.一、《考试说明》的要求:变化:1.顺序有变化,符合学生学习的顺序;2.变换的性质比较笼统没有2014年的说明具体;3.“作图”变为“画图”,画图的要求更加具体;4.基本的轴对称图形由六个变为五个,删掉了“等腰梯形”;5.C级要求的“解决简单问题”统一变为“解决有关问题”二、图形变换在近6年中考中的分布及呈现方式:近6年的中考中,变换在选择、填空、操作题、第23题、第24题、第25题中都有出现过,主要的考察方式有:辨别轴对称图形与中心对称图形;通过阅读理解获取有效信息,选择合适的的变换对图形进行重新构造从而解决问题;把函数的图象进行变换,要求发现平移后的函数与原函数之关系;应用变换的思想综合运用几何知识添加适当的辅助线解决问题.三、复习建议:123.对于几何综合题的复习要引导学生从几何图形与变换的角度重新认识常见辅助线的添加方法,比如:(1)中点、中线——中心对称——倍长中线——中位线(2)等腰三角形、角平分线、垂直平分线一一轴对称一一截长补短;(3)平行四边形一一平移;(4)正多边形、共端点的等线段一一旋转;4.对于坐标系中研究函数图象的平移和对称的问题要引导学生抓住问题的本质,把该问题转化函数图象上点的变换问题,进而进一步转化为函数图象上关键点的变换问题.四、第一轮复习安排和例题共用三个课时,第一课时:三种变换的概念和性质的简单应用;第二课时,作图和操作问题;第三课时:综合.例1( 2013北京)下列图形中,是中心对称图形但不是轴对称图形的是()易混淆;怕文字表述的图形•例 2 如图,Rt△ ABC中,/ ACB= 90°,AO 2cm, ■ A = 60 .将△ ABC沿AB边所在直线向右平移,记平移后它的对应三角形DEF 若将△ ABC 沿直线AB 向右平移3 cm ,求此时梯形CAEF 勺面积;【答案】53学生存在的问题:弄不清 3cm 是那条线段的长,不会分类. 例 3 (2011 上海)Rt △ ABC 中,已知/ C = 90°,/ B = 50°,点D 在边BC 上, BD= 2CD 把厶ABC 绕着点D 逆时针旋转 m (0 <n<180 )度后,如果点B 恰好落在初始Rt △ ABC 的 边上,那么m=学生存在的问题:会将整个△ ABC 旋转后的图形都画,把图形弄复杂 例 4 (2013 湖南郴州)如图,在 Rt △ ACB 中, / ACB=90,/ A=25 , D 是AB 上一点.将 Rt △ ABC 沿CD 折叠,使B 点落在AC 边上的B'处, 贝ADB 等于( )【答案】DA. 25°B . 30°C . 35°D . 40°学生存在的问题:轴对称的性质应用不全面,想到了边,但忘了角•《探诊》P17 T10题 例5西总P29例4学生存在的问题:一是没看清把那个三角形平移或对称,二(1)(2) 若使平移后得到的△ CDF 是直角三角形,则厶ABC 平移的距离应为cm.【答 案】1【答案】80和120 西总P3仃10B是不会判断中心对称 西总P88例1例6 (2014顺义二模)如图,正方形 ABCD 勺边长为3,点E ,F 分另用边AB, BC 上, AE= BF = 1,小球P 从点E 出发沿直 D -------------------- C 线向点F 运动,每当碰到正方形的边时反弹,反弹时反射 角 等于入射角.当小球P 第一次碰到BC 边时,小球P 所经过A E B的路程为 _________ ;当小球P 第一次碰到AD 边时,小球P 所经过的路程为 __________ ;当小球P 第n ( n 为正整数)次碰到点 F 时,小球 P 所经过的路程为.【答案】V 5 , 5V 5 ,6V 5n —5炎.2学生存在的问题:作图不合理,不会将角关系转化为线段的关系例7 (2011北京中考).阅读下面材料:小伟遇到这样一个问题:如图1,在梯形ABCD 中,AD // BC ,对角线AC 、 BD 相交于点O .若梯形ABCD 的面积为1,试求以AC 、BD 、AD BC 的长度 为三边长的三角形的面积.小伟是这样思考的:要想解决这个问题, 首先应想办法移动这些分散的线段,构造一 个三角形,再计算其面积即可,他先后尝试 了翻折、旋转、平移的方法,发现通过平移 可以解决这个问题.他的方法是过点 D 作AC的平行线交BC 的延长线于点E ,得到的△ BDE 即是以 AC 、BD 、AD BC 的长度为三边 长的三角形(如图2).请你回答:图2中△ BDE 的面积等于_______________________________________________ . 参考小伟同学思考问题的方法,解决下列问题: 如图3, △ ABC 的三条中线分别为 AD 、BE 、CF .⑴ 在图3中利用图形变换画出并指明以 AD 、BE 、CF 的长度为三边长的一 个三角形(保留画图痕迹);⑵ 若厶ABC 的面积为1,则以AD BE CF 的长度为三边长的三角形的面积 学生存在的问题:主要是在第三问,能画出图但找不出新三角形与原图形之间 的面积关系,究其原因就是对于中线等分面积的性质不太会用图3例8(2013北京中考)在平面直角坐标系x O y 中,y = mx 2 一2mx 一2 ( m^0) 与 y 轴交于点 A , 对称轴与x 轴交于点B o(1) 求点A , B 的坐标;(2) 设直线I 与直线AB 关于该抛物线的对称,求直线I 的解析式;(3)若该抛物线在- 2 ::: x ::: -1这一段位于直线段位于直线AB 的下方,求该抛物线的解析式 P89西总例2图形这一特点,同时对于抛物线的连续性理解不到位•例9 (2013.1海淀期末).抛物线y = mx 2 • (m -3)x-3(m 0)与x 轴交于A 、B 两 点,且点A 在点B 的左侧,与y 轴交于点C, OB=O.C(1) 求这条抛物线的解析式;(2) 若点Px b)与点Qx 2,b)在(1)中的抛物线上,且 治 乜,PQ=n①求 4x 12 -2x 2n 6n 3 的值;②将抛物线在PQ 下方的部分沿PQ 翻折,抛物线的其它部分保持不变,得到 一个新图象•当这个新图象与 x 轴恰好只有两个公共点时,b 的取值范围 是 .称的,另外就是n 与X 1、X 2的关系弄错,再就是消元不明确;第三问主要是临界 点把握不好,缺乏对于运动变换问题连续搜索的习惯抛物线称轴对I 的上方,并且在2 x 3这一例10 (2014海淀二模)在A ABC中,.ABC =90J , D为平面内一动点,AD =a , AC =b,其中a, b为常数,且a:::b.将厶ABD沿射线BC方向平移,得到△ FCE,点A、B、D的对应点分别为点F、C、E.连接BE .(1)如图1,若D在A ABC内部,请在图1中画出△FCE ;(2)在(1 )的条件下,若AD _ BE,求BE的长(用含a, b的式子表示);(3)若N BACp,当线段BE的长度最大时,则ZBAD的大小为_______________ ;当线段BE的长度最小时,则ZBAD的大小为_________________ (用含G的式子表示)图1 备用图例11(2014北京中考).在正方形ABCD外侧作直线AP,点B关于直线AP的对称点为E,连接BE, DE,其中DE交直线AP于点F .(1)依题意补全图1 ;(2)若.PAB =20,求.ADF 的度数;(3)如图2, 若45、/PAB:::90,用等式表示线段AB,FE,FD之间的数量关系,并证明.第一问解决问题的策略与方法,另外就是对于线段之间的关系不敏感例12 (2014昌平二模)【探究】如图1,在厶ABC中, D是AB边的中点,AE1 BC于点E, BF丄AC于点F, AE BF相交于点M连接DE DF贝U DE DF 的数量关系为.【拓展】如图2,在厶A B C中,C B = C A,点D是AB边的中点,点M在△ A BC的内部,且Z MB(=Z MAC过点M作MEL BC于点E, MFL AC于点F,连接DE DF 求证:DE=DF;【推广】如图3,若将上面【拓展】中的条件“ CB=CA变为“ CB^CA,其他条件不变,试探究DE与DF之间的数量关系,并证明你的结论.学生存在的问题:主要问题出在第三问一是二次相似确实是一个难点,二是证角等的方法不多•五. 专题整理专题一、平移变换1.(2011湖北黄冈)如图,把 Rt △ ABC 放在直角坐标系内,/ CAB 90°, BC =5,点A B 的坐标分别为( 将厶ABC 沿 x 轴向右平移,当点 C 落在直线y =2x —6上时A. 4B. 8C. 16D. &,22. (2011广东台山)如图,正方形 ABC 闲正方形EFGH 勺边长分别为2 2和..2 , 对角线BD FH 都在直线L 上,。

七年级美术《透视》精品课件浙教版

七年级美术《透视》精品课件浙教版

七年级美术《透视》精品课件浙教版一、教学内容本节课的教学内容选自浙教版七年级美术教材的第九章《空间与透视》第一节“透视”。

详细内容主要包括:理解透视的概念,掌握一点透视和两点透视的基本原理及其在实际绘画中的应用;学习运用透视方法创作具有深度和立体感的美术作品。

二、教学目标1. 让学生掌握透视的基本概念,了解一点透视和两点透视的原理。

2. 培养学生运用透视方法进行绘画创作的能力,提高其作品的空间感和立体感。

3. 激发学生对美术创作的兴趣,培养其观察、想象和创新思维能力。

三、教学难点与重点教学难点:一点透视和两点透视的运用。

教学重点:透视概念的理解,透视方法的掌握。

四、教具与学具准备教具:多媒体课件、黑板、粉笔、透视示例图。

学具:绘画纸、铅笔、橡皮、尺子。

五、教学过程1. 导入(5分钟)利用多媒体展示一系列具有透视效果的美术作品,引导学生观察、讨论,引出本节课的主题——透视。

2. 知识讲解(15分钟)(1)介绍透视的概念,解释一点透视和两点透视的原理。

(2)结合示例图,讲解一点透视和两点透视在绘画中的应用。

3. 实践演示(10分钟)在黑板上现场演示一点透视和两点透视的绘画方法,边讲解边示范。

4. 随堂练习(15分钟)学生根据所学知识,运用透视方法进行绘画创作。

教师巡回指导,解答学生疑问。

5. 互动交流(5分钟)(2)布置课后作业,鼓励学生继续探索透视的奥秘。

六、板书设计1. 透视概念2. 一点透视和两点透视的原理3. 透视在绘画中的应用七、作业设计1. 作业题目:运用透视方法创作一幅具有空间感和立体感的美术作品。

2. 答案:学生作品。

八、课后反思及拓展延伸1. 反思:本节课学生对透视的理解和运用程度,教学方法是否得当,学生绘画技能的提高情况等。

2. 拓展延伸:引导学生课后观察生活中的透视现象,尝试运用所学知识进行创作,提高其美术素养。

重点和难点解析1. 透视概念的理解2. 一点透视和两点透视的原理与应用3. 实践演示的详细步骤4. 作业设计的针对性与指导性一、透视概念的理解透视是绘画中表现空间关系的一种方法,它通过线条的收缩和颜色的变化,使画面产生深度和立体感。

七年级美术《透视》精品课件浙教版

七年级美术《透视》精品课件浙教版

七年级美术《透视》精品课件浙教版一、教学内容本节课选自浙教版七年级美术教材第四章《视觉的立体》,详细内容为透视原理及其在绘画中的应用。

本章通过透视的概念、种类、应用等,让学生掌握视觉立体感的表达,培养空间想象力。

二、教学目标1. 让学生了解透视的基本概念,掌握一点透视和两点透视的画法。

2. 培养学生的空间想象力,提高绘画表现力。

3. 激发学生对美术创作的兴趣,培养审美情趣。

三、教学难点与重点教学难点:透视原理的理解和运用。

教学重点:一点透视和两点透视的画法。

四、教具与学具准备教具:透视原理图、绘画实例、画纸、画笔、颜料等。

学具:画纸、画笔、颜料、直尺、圆规等。

五、教学过程1. 导入:通过展示生活中常见的透视现象,如铁轨、道路等,引出本节课的主题——透视。

2. 新课内容:讲解透视的基本概念,如视平线、消失点等,并通过实例分析,让学生理解一点透视和两点透视的画法。

3. 实践操作:学生分组进行透视练习,教师巡回指导,解答学生疑问。

4. 例题讲解:分析一幅含有透视的绘画作品,讲解其透视原理和画法。

5. 随堂练习:学生根据所学,尝试完成一幅含有透视的绘画作品。

六、板书设计1. 透视基本概念:视平线、消失点、一点透视、两点透视等。

2. 透视画法步骤:确定视平线、找出消失点、画出景物、调整细节等。

3. 绘画实例分析:一幅含有透视的绘画作品。

七、作业设计1. 作业题目:完成一幅含有透视的绘画作品,要求运用一点透视或两点透视。

2. 答案:学生作品。

八、课后反思及拓展延伸1. 反思:本节课学生对透视原理的理解和运用程度,以及教学方法的适用性。

2. 拓展延伸:鼓励学生观察生活中的透视现象,运用所学知识进行创作,提高绘画水平。

同时,引导学生欣赏经典透视绘画作品,提高审美能力。

重点和难点解析1. 教学难点与重点的把握;2. 教具与学具的准备;3. 教学过程中的实践操作和例题讲解;4. 板书设计;5. 作业设计;6. 课后反思及拓展延伸。

七年级美术《透视》课件浙教版

七年级美术《透视》课件浙教版

七年级美术《透视》课件浙教版一、教学内容本节课我们学习的是浙教版七年级美术教材中《透视》一章节的内容。

详细内容包括透视的基本概念、一点透视和两点透视的原理及其在实际绘画中的应用。

二、教学目标1. 让学生了解透视的基本概念,理解透视原理在绘画中的重要性。

2. 掌握一点透视和两点透视的画法,能将其应用于实际绘画作品。

3. 培养学生的观察能力和空间想象力,提高他们的审美素养。

三、教学难点与重点重点:透视的基本概念、一点透视和两点透视的画法。

难点:如何将透视原理灵活应用于实际绘画中。

四、教具与学具准备1. 教具:PPT课件、绘画实例、画纸、画笔、尺子、橡皮等。

2. 学具:画纸、画笔、尺子、橡皮等。

五、教学过程1. 导入:展示一幅具有透视效果的绘画作品,引导学生观察并思考:这幅画为什么会呈现出这样的视觉效果?2. 新课导入:通过PPT课件,讲解透视的基本概念、一点透视和两点透视的原理。

3. 实践环节:以一点透视和两点透视为例,现场演示绘画过程,指导学生动手练习。

4. 例题讲解:分析一幅绘画作品中的透视应用,让学生了解如何将透视原理运用到实际绘画中。

5. 随堂练习:布置一道绘画题目,要求学生运用所学透视知识完成作品。

六、板书设计1. 透视基本概念2. 一点透视原理及画法3. 两点透视原理及画法七、作业设计1. 作业题目:运用透视原理,画一幅身边的景物。

2. 答案:学生作品。

八、课后反思及拓展延伸1. 反思:本节课学生对透视原理的掌握程度,以及在实际绘画中的应用情况。

重点和难点解析1. 教学难点与重点的识别2. 实践环节的演示与指导3. 例题讲解的深度与广度4. 作业设计的针对性与实践性5. 课后反思与拓展延伸的实际效果详细补充和说明:一、教学难点与重点的识别在透视教学中,要明确的是教学难点和重点。

透视的基本概念、一点透视和两点透视的画法是本节课的重点内容,而如何将这些理论灵活应用于实际绘画中,则是学生需要克服的难点。

2015中考数学全景透视一轮复习课件(第01-05讲)-2

2015中考数学全景透视一轮复习课件(第01-05讲)-2

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考点二
分式的基本性质
A A· C A A÷ C 1. = , = (C≠0) ,其中 A , B , C 是 B B· C B B÷ C 整式. 2.约分:关键是确定分式的分子与分母中的最大 公因式.确定最大公因式的一般步骤是:当分子、分 母是多项式时,先因式分解,再取系数的最大公约数 与相同字母(因式)的最低次幂的积为最大公因式.
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3.通分:关键是确定几个分式的最简公分母. 确定最简公分母的一般步骤是:当分母是多项式时, 先因式分解,再取系数的最小公倍数与所有不同字母 (因式)的最高次幂的积为最简公分母.
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需要更完整的资源请到 新世纪教 育网 -
A 3.分式 的值为0:当A=0且B≠0时,分式的值 B 为0.
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温馨提示: 分母中含有字母是分式与分数概念的根本区别; 判断一个式子是不是分式,若分子和分母含有公因 式,不要约去公因式,直接根据概念判断即可.
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方法总结: 1.同分母分式相加减“把分子相加减”就是把各 个分式的分子“整体”相加减,各分子都应加括号, 特别是相减时,要避免出现符号错误. 2.异分母分式相加减应先通分再加减.
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n a a n b = bn (b≠0,n 是正整数).
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4.分式的混合运算 在分式的混合运算中,应先算乘方、开方,再算 乘除,最后进行加减运算,如遇到有括号的,先算括 号里面的.运算结果必须是最简分式或整式. 注意:在分式的运算中,分式只能通分,不能去 分母.

七年级美术《透视》课件浙教版

七年级美术《透视》课件浙教版

七年级美术《透视》课件浙教版一、教学内容本节课我们将学习浙教版七年级美术教材中关于《透视》的内容。

具体包括教材的第三章第二节,详细内容涉及基本透视原理、一点透视和两点透视的绘制方法,以及在实际绘画中的应用。

二、教学目标1. 让学生了解和掌握透视的基本概念和原理,能理解透视在绘画中的作用。

2. 培养学生运用一点透视和两点透视进行绘画的能力,提高其空间表现力。

3. 激发学生对美术创作的兴趣,培养其观察力、表现力和创造力。

三、教学难点与重点教学难点:透视原理的理解和运用。

教学重点:一点透视和两点透视的绘制方法。

四、教具与学具准备教具:透视原理图、绘画实例、画纸、画笔、颜料等。

学具:画纸、铅笔、橡皮、直尺、画板等。

五、教学过程1. 导入:通过展示生活中具有透视效果的图片,引导学生观察和思考,引出本节课的主题——透视。

2. 知识讲解:讲解透视的基本概念、原理和分类,结合教材内容和实例,让学生直观地了解透视在绘画中的应用。

3. 实践操作:a. 演示一点透视的绘制方法,让学生跟随步骤进行练习。

b. 演示两点透视的绘制方法,让学生跟随步骤进行练习。

4. 课堂互动:组织学生进行作品展示和评价,互相交流心得,提高其审美和创作能力。

六、板书设计1. 透视基本概念、原理和分类。

2. 一点透视和两点透视的绘制方法。

七、作业设计1. 作业题目:运用一点透视或两点透视,绘制一幅风景画。

2. 答案:要求画面具有一定的空间感,透视关系正确,线条流畅。

八、课后反思及拓展延伸1. 反思:关注学生在课堂上的表现,了解其在透视理解和运用方面的困难,为下一节课的教学做好准备。

2. 拓展延伸:鼓励学生利用课外时间,观察生活中的透视现象,进行绘画创作,提高其美术素养。

同时,可以引导学生了解其他透视方法,如三点透视等,丰富其绘画技能。

重点和难点解析1. 教学难点:透视原理的理解和运用。

2. 教学重点:一点透视和两点透视的绘制方法。

3. 实践操作中的演示和练习。

七年级美术《透视》课件浙教版

七年级美术《透视》课件浙教版

七年级美术《透视》课件浙教版一、教学内容本节课的教学内容选自浙教版七年级美术教材中《透视》章节。

详细内容包括:透视的基本概念,直线透视的规律和方法,以及透视在美术创作中的应用。

二、教学目标1. 让学生了解和掌握透视的基本概念和直线透视的规律。

2. 培养学生运用透视知识进行美术创作的能力。

3. 激发学生对美术创作的兴趣,提高审美素养。

三、教学难点与重点教学难点:直线透视的规律及其应用。

教学重点:透视的基本概念,直线透视的规律。

四、教具与学具准备1. 教具:多媒体课件、黑板、粉笔、示范画。

2. 学具:画纸、铅笔、橡皮、直尺。

五、教学过程1. 导入:通过展示一组具有透视效果的图片,引导学生观察和分析,引出本节课的主题——透视。

2. 知识讲解:a. 介绍透视的基本概念。

b. 讲解直线透视的规律和方法。

c. 分析透视在美术创作中的应用。

3. 示范演示:a. 演示如何运用直线透视规律进行绘画。

b. 展示透视在美术作品中的应用实例。

4. 实践环节:a. 学生分组讨论,探讨透视在生活中的应用。

b. 学生进行绘画练习,运用透视知识完成一幅作品。

六、板书设计1. 透视的基本概念2. 直线透视的规律3. 透视在美术创作中的应用七、作业设计1. 作业题目:运用透视知识,完成一幅具有透视效果的画作。

2. 答案要求:作品需体现直线透视规律,具有立体感。

八、课后反思及拓展延伸2. 拓展延伸:a. 鼓励学生课后观察生活中的透视现象,提高审美意识。

b. 布置一道拓展作业:运用透视知识,为学校设计一幅宣传海报。

重点和难点解析1. 教学难点与重点的确定。

2. 教学过程中的实践环节。

3. 作业设计。

4. 课后反思及拓展延伸。

一、教学难点与重点的确定教学难点与重点是本节课的核心,对学生的学习起到关键作用。

在《透视》这一章节中,直线透视的规律和方法是难点与重点。

直线透视规律包括消失点、视平线和等距缩小等概念,这些规律在美术创作中具有重要意义。

七年级美术《透视》课件浙教版

七年级美术《透视》课件浙教版

七年级美术《透视》课件浙教版一、教学内容本节课我们将学习浙教版七年级美术教材中关于《透视》的内容。

具体章节为第三章《空间与透视》,详细内容包括透视的基本概念、一点透视、两点透视和三点透视的原理及其在实际绘画中的应用。

二、教学目标1. 让学生理解透视的概念,掌握不同类型透视的绘画方法。

2. 培养学生的空间想象力和观察力,提高绘画表现能力。

3. 引导学生运用透视原理创作具有立体感的美术作品。

三、教学难点与重点教学难点:透视原理的理解和运用。

教学重点:一点透视、两点透视和三点透视的绘画方法。

四、教具与学具准备教具:多媒体课件、黑板、粉笔、透视模型。

学具:铅笔、橡皮、画纸、直尺。

五、教学过程1. 导入:通过展示一组具有强烈透视效果的美术作品,引发学生对透视现象的兴趣,进而引入本课主题。

2. 知识讲解:a. 讲解透视的基本概念,解释近大远小、近长远短等现象。

b. 演示一点透视、两点透视和三点透视的绘画方法。

3. 例题讲解:结合教材中的实例,详细讲解透视绘画步骤和技巧。

4. 随堂练习:学生根据所学知识,尝试完成一幅透视绘画作品。

5. 互动交流:学生展示自己的作品,教师进行点评和指导。

六、板书设计1. 板书《透视》2. 主要内容:a. 透视概念b. 一点透视、两点透视、三点透视c. 透视绘画步骤和技巧七、作业设计1. 作业题目:运用透视原理,创作一幅具有立体感的美术作品。

2. 答案要求:作品需展现透视效果,构图合理,线条流畅。

八、课后反思及拓展延伸2. 拓展延伸:鼓励学生观察生活中的透视现象,将所学知识运用到实际创作中,提高绘画表现力。

同时,引导学生关注其他美术流派中的透视运用,拓宽视野。

重点和难点解析1. 教学难点与重点的确定2. 教学过程中的知识讲解和例题讲解3. 作业设计的要求4. 课后反思及拓展延伸的实践运用详细补充和说明:一、教学难点与重点的确定重点和难点解析:透视原理的理解和运用是本节课的核心,特别是对一点透视、两点透视和三点透视的绘画方法的掌握。

七年级美术《透视》课件浙教版

七年级美术《透视》课件浙教版

七年级美术《透视》课件浙教版一、教学内容本节课我们将学习浙教版七年级美术教材中关于“透视”的内容。

具体章节为第五章“空间与透视”,其中详细内容包括透视的基本概念、一点透视、两点透视、三点透视以及透视在绘画中的应用。

二、教学目标1. 让学生了解和掌握透视的基本概念,理解透视在绘画中的重要性。

2. 培养学生运用透视原理进行绘画的能力,提高空间表现力。

3. 激发学生对美术创作的兴趣,培养审美情趣。

三、教学难点与重点教学难点:透视原理的理解与运用。

教学重点:一点透视、两点透视、三点透视的绘画方法。

四、教具与学具准备1. 教具:多媒体课件、透视示例图、绘画工具。

2. 学具:铅笔、橡皮、画纸、画板。

五、教学过程1. 导入:展示一组具有透视效果的绘画作品,引导学生观察并思考其特点。

2. 知识讲解:a. 介绍透视的基本概念。

b. 讲解一点透视、两点透视、三点透视的绘画方法。

c. 分析透视在绘画中的应用。

3. 示例讲解:以一幅绘画作品为例,讲解如何运用透视原理进行绘画。

4. 随堂练习:学生根据所学知识,尝试运用透视原理进行绘画练习。

5. 作业布置:布置一道具有透视效果的绘画题目。

六、板书设计1. 《透视》2. 内容:a. 透视基本概念b. 一点透视、两点透视、三点透视c. 透视在绘画中的应用七、作业设计1. 作业题目:以教室一角为题材,运用透视原理进行绘画创作。

2. 答案:无固定答案,要求画面具有透视效果。

八、课后反思及拓展延伸1. 反思:本节课学生掌握透视原理的情况,及时调整教学方法,提高教学效果。

2. 拓展延伸:引导学生关注生活中的透视现象,激发创作灵感。

重点和难点解析1. 教学难点与重点的确定。

2. 教具与学具的准备。

3. 教学过程中的实践情景引入、例题讲解和随堂练习。

4. 板书设计。

5. 作业设计。

一、教学难点与重点的确定教学难点与重点是透视原理的理解与运用,特别是对一点透视、两点透视、三点透视的绘画方法的掌握。

学而思九年级数学上1-12讲

学而思九年级数学上1-12讲

第一讲 ───垂直平分线与角平分线 第二讲 ───等腰三角形第三讲 ───平行四边形的性质与判定 第四讲 ───菱形的性质与判定 第五讲 ───矩形的性质与判定第六讲 ───平行四边形和特殊平行四边形性质的应用 第七讲 ───中垂线角平分线复习题 第八讲 ───梯 形第九讲 ───二次函数c ax y +=2的图象 第十讲 ───二次函数y=ax 2的图象与性质 第十一讲 ───二次函数y=ax 2+bx+c 的性质与图象第十二讲 ───二次函数的最值问题第一讲───垂直平分线与角平分线【知识要点:】Ⅰ.线段的垂直平分线定理:线段的垂直平分线上任意一点到这条线段两个端点的距离都相等。

线段的垂直平分线逆定理:若一个点到线段的两个端点的距离相等,则它必在线段的垂直平分线上。

Ⅱ.三角形三边的垂直平分线的性质:三角形三边的垂直平分线的交点到三个顶点的距离相等。

Ⅲ.角平分线性质定理:角平分线上的点到这个角的两边的距离相等。

(注:距离是指角平分线上任一点到这个角的两边所作的垂线段的长度。

)角平分线性质定理的逆定理:若某点到一个角的两边距离相等,则该点在这个角的平分线上。

Ⅳ.三角形三角的角平分线的性质:三角形三角的角平分线的交点到三边的距离相等。

【经典例题:】例1.如图,∠B=∠C=90°,M是BC的中点,DM平分∠ADC,求证:AM平分∠DAB.例2.如右图,已知ABCABC,AD是BC边上的高,E是AD上一点,ED=CD,∆中,BA=BC,︒∠45=连接EC。

求证:EA=EC。

例3.如右图,已知AD 是ABC ∆的角平分线,DE 、DF 分别是ABD ∆和ACD ∆的高,DE=DF 。

求证:AD 垂直平分EF 。

例4.如图,ABC ∆是等腰直角三角形,AB=AC ,D 是斜边上BC 的中点,E 、F 分别是AB 、AC 边上的点,且DE ⊥DF ,若BE=12,CF=5,求EF 的长.例5.如右图,四边形ABCD 中,︒=∠=∠90ACB ADB ,E ,F 分别是DC 、AB 的中点,连接DF 、CF ,观察图形:(1)DF 和CF 相等吗?为什么?(2)EF 是否垂直平分DC ,请说明理由。

2015中考数学全景透视一轮复习课件(第01-05讲)-3

2015中考数学全景透视一轮复习课件(第01-05讲)-3

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温馨提示: 列代数式时书写要规范: 1 代数式中表示字母与字母相乘或数字与字母相 乘时,乘号通常省略不写 或用“· ”表示,数字因数 要写在前面;2数与数相乘时,乘号不能省略;3带 分数要化成假分数;4除号要写成分数线;5有和、 差形式的要添括号.
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(2)去括号与添括号 ①a+(b+c)=a+b+c,a-(b+c)=a-b-c; ②a+b-c=a+( b-c ),a-b+c=a-( b-c ). (3)整式加减的实质是去括号、合并同类项.
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3.用代数式表示变化规律 (1)用代数式表示图形的变化规律;(2)用代数式 表示等式的变化规律;(3)用代数式表示数或式的变化 规律.
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考点二
整式的有关概念
1.单项式:由数与字母的乘积组成的代数式叫 做单项式.单独的一个数或一个字母也是单项式,单 项式中的数字因数叫做这个单项式的系数;单项式中 所有字母的指数和叫做这个单项式的次数.
2 2 2
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温馨提示: 1.平方差公式变式:a-ba+b=a2-b2, b+aa-b=a -b ,b+a-b+a=a -b , a+b-ca-b+c=a -b-c 等. 2.完全平方公式变形:a-b2=a+b2-4ab, -a-b =a+b ,-a+b =a-b , a+b+c =a +b +c +2ab+2bc+2ca 等. 3.公式中 a,b 既可以表示单项式,也可以表示多 项式;这些公式既可以正用,也可以逆用.
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中考全景透视一轮复习课件(第22讲图形的相似与位似)

中考全景透视一轮复习课件(第22讲图形的相似与位似)
答案: D
5.(2014·东营)下列关于位似图形的表述:①相似
图形一定是位似图形,位似图形一定是相似图形;
②位似图形一定有位似中心;③如果两个图形是相似
图形,且每组对应点的连线所在的直线都经过同一个
点,那么,这两个图形是位似图形;④位似图形上任
意两点与位似中心的距离之比等于位似比.其中正确
命题的序号是是( )
)
A. m2 ,n
B.(m,n)
C. m,n2
D. m2 ,n2
解析:由图可知 A(4,6),A′(2,3),B(6,2),B′(3,1), ∴△ABO 和△A′B′O 以点 O 为位似中心,且位似 比是12.
∴P(m,n)的对应点 P′的坐标为m2 ,n2. 故选 D.
答案: D
9.如图,六边形ABCDEF∽六边形GHIJKL,相 似比为2∶1,则下列结论正确的是( )
A.∠E=2∠K B.BC=2HI C.六边形ABCDEF的周长=六边形GHIJKL的 周长 D.S六边形ABCDEF=2S六边形GHIJKL
解析:∵六边形 ABCDEF∽六边形 GHIJKL, ∴∠E=∠K,故 A 错误;∵六边形 ABCDEF∽六 边形 GHIJKL,相似比为 2∶1,∴BC=2HI,六边 形 ABCDEF 的周长=六边形 GHIJKL 的周长×2, S 六边形 ABCDEF=4S 六边形 GHIJKL,故 B 正确,C 错误, D 错误.故选 B.
注意:一条线段有两个黄金分割点.
考点四 相似多边形的定义及性质 1.定义 各角对应相等,各边对应成比例的两个多边形叫 做相似多边形.相似多边形的对应边的比称为相似比. 2.性质 (1)相似多边形对应角相等,对应边的比相等. (2)相似多边形周长的比等于相似比. (3)相似多边形面积的比等于相似比的平方.

学而思寒假七年级尖子班讲义第1讲平行线四大模型(1)

学而思寒假七年级尖子班讲义第1讲平行线四大模型(1)

目次之袁州冬雪创作Contents第1讲平行线四大模子 (1)第2讲实数三大概念 (17)第3讲平面直角坐标系 (33)第4讲坐标系与面积初步 (51)第5讲二元—次方程组进阶 (67)第6讲含参不等式(组) (79)1平行线四大模子知识方针方针一熟练掌握平行线四大模子的证明方针二熟练掌握平行线四大模子的应用方针三掌握辅助线的构造方法,熟悉平行线四大模子的构造秋季回顾平行线的断定与性质l、平行线的断定根据平行线的定义,如果平面内的两条直线不相交,便可以断定这两条直线平行,但是,由于直线无限延伸,检验它们是否相交有坚苦,所以难以直接根据定义来断定两条直线是否平行,这就需要更简单易行的断定方法来断定两直线平行.断定方法l:两条直线被第三条直线所截,如果同位角相等,那末这两条直线平行.简称:同位角相等,两直线平行.断定方法2:两条直线被第三条直线所截,如果内错角相等,那末这两条直线平行.简称:内错角相等,两直线平行,断定方法3:两条直线被第三条直线所截,如果同旁内角互补,那末这两条直线平行.简称:同旁内角互补,两直线平行,如上图:若已知∠1=∠2,则AB∥CD(同位角相等,两直线平行);若已知∠1=∠3,则AB∥CD(内错角相等,两直线平行);若已知∠1+ ∠4= 180°,则AB∥CD(同旁内角互补,两直线平行).还有平行公理推论也能证明两直线平行:平行公理推论:如果两条直线都与第三条直线平行,那末这两条直线也互相平行.2、平行线的性质操纵同位角相等,或者内错角相等,或者同旁内角互补,可以断定两条直线平行.反过来,如果已知两条直线平行,当它们被第三条直线所截,得到的同位角、内错角、同旁内角也有相应的数量关系,这就是平行线的性质.性质1:两条平行线被第三条直线所截,同位角相等.简称:两直线平行,同位角相等性质2:两条平行线被第三条直线所截,内错角相等.简称:两直线平行,内错角相等性质3:两条平行线被第三条直线所截,同旁内角互补.简称:两直线平行,同旁内角互补本讲进阶平行线四大模子模子一“铅笔”模子点P在EF右侧,在AB、CD外部“铅笔”模子结论1:若AB∥CD,则∠P+∠AEP+∠PFC=360°;结论2:若∠P+∠AEP+∠PFC= 360°,则AB∥CD.模子二“猪蹄”模子(M模子)点P在EF左侧,在AB、CD外部“猪蹄”模子结论1:若AB∥CD,则∠P=∠AEP+∠CFP;结论2:若∠P=∠AEP+∠CFP,则AB∥CD.模子三“臭脚”模子点P在EF右侧,在AB、CD外部“臭脚”模子结论1:若AB∥CD,则∠P=∠AEP-∠CFP或∠P=∠CFP-∠AEP;结论2:若∠P=∠AEP-∠CFP或∠P=∠CFP-∠AEP,则AB∥CD.模子四“骨折”模子点P在EF左侧,在AB、CD外部“骨折”模子结论1:若AB∥CD,则∠P=∠CFP-∠AEP或∠P=∠AEP-∠CFP;结论2:若∠P=∠CFP-∠AEP或∠P=∠AEP-∠CFP,则AB∥CD.巩固操练平行线四大模子证明(1)已知AE // CF ,求证∠P +∠AEP +∠PFC = 360°.(2)已知∠P=∠AEP+∠CFP,求证AE∥CF.(3)已知AE∥CF,求证∠P=∠AEP-∠CFP.(4) 已知∠P = ∠CFP -∠AEP ,求证AE //CF .模块一 平行线四大模子应用例1(1)如图,a ∥b ,M 、N 分别在a 、b 上,P 为两平行线间一点,那末∠l +∠2+∠3= .(2)如图,AB ∥CD ,且∠A =25°,∠C =45°,则∠E的度数是. (3)如图,已知AB ∥DE ,∠ABC =80°,∠CDE =140°,则∠BCD = .(4) 如图,射线AC ∥BD ,∠A = 70°,∠B = 40°,则∠P =.练(1)如图所示,AB ∥CD ,∠E =37°,∠C = 20°,则∠EAB 的度数为.(2) (七一中学2015-2016七下3月月考)如图,AB ∥CD ,∠B =30°,∠O =∠C .则∠C =.例2如图,已知AB ∥DE ,BF 、DF 分别平分∠ABC 、∠CDE ,求∠C 、∠F 的关系.练如图,已知AB ∥DE ,∠FBC =n 1∠ABF ,∠FDC =n 1∠FDE . (1)若n =2,直接写出∠C 、∠F 的关系; (2)若n =3,试探宄∠C 、∠F 的关系;(3)直接写出∠C 、∠F的关系 (用含n 的等式暗示). 例3如图,已知AB ∥CD ,BE 平分∠ABC ,DE 平分∠ADC .求证:∠E = 2 (∠A +∠C ) .练如图,己知AB∥DE,BF、DF分别平分∠ABC、∠CDE,求∠C、∠F的关系.例4如图,∠3==∠1+∠2,求证:∠A+∠B+∠C+∠D= 180°.练(武昌七校2015-2016七下期中)如图,AB⊥BC,AE平分∠BAD交BC于E,AE⊥DE,∠l+∠2= 90°,M、N分别是BA、CD的延长线上的点,∠EAM和∠EDN的平分线相交于点F则∠F的度数为().A. 120°B. 135°C. 145°D. 150°模块二平行线四大模子构造例5如图,直线AB∥CD,∠EFA= 30°,∠FGH= 90°,∠HMN=30°,∠CNP= 50°,则∠GHM=.练如图,直线AB∥CD,∠EFG =100°,∠FGH =140°,则∠AEF+ ∠CHG=.例6已知∠B =25°,∠BCD=45°,∠CDE =30°,∠E=l0°,求证:AB∥EF.练已知AB∥EF,求∠l-∠2+∠3+∠4的度数.(1)如图(l ),已知MA 1∥NA n ,探索∠A 1、∠A 2、…、∠A n ,∠B 1、∠B 2…∠B n -1之间的关系.(2)如图(2),己知MA 1∥NA 4,探索∠A 1、∠A 2、∠A 3、∠A 4,∠B 1、∠B 2之间的关系.(3)如图(3),已知MA 1∥NA n ,探索∠A 1、∠A 2、…、∠A n 之间的关系.如图所示,两直线AB ∥CD 平行,求∠1+∠2+∠3+∠4+∠5+∠6. 挑战压轴题(粮道街2015—2016七下期中)如图1,直线AB ∥CD ,P 是截线MN 上的一点,MN 与CD 、AB 分别交于E 、F .(1)若∠EFB =55°,∠EDP = 30°,求∠MPD 的度数;(2)当点P 在线段EF 上运动时,∠CPD 与∠ABP 的平分线交于Q ,问:DPB Q∠∠是否为定值?若是定值,请求出定值;若不是,说明其范围;(3)当点P 在线段EF 的延长线上运动时,∠CDP 与∠ABP 的平分线交于Q ,问DPB Q∠∠的值足否定值,请在图2中将图形补偿完整并说明来由.第一讲平行线四大模子(课后作业)1.如图,AB // CD // EF , EH ⊥CD 于H ,则∠BAC +∠ACE +∠CEH 等于( ).A . 180°B . 270°C . 360°D . 450°2.(武昌七校2015-2016七下期中)若AB ∥CD ,∠CDF =32∠CDE ,∠ABF =32∠ABE ,则∠E :∠F =( ).A .2:1B .3:1C .4:3D .3:23.如图3,己知AE ∥BD ,∠1=130°,∠2=30°,则∠C =.4.如图,已知直线AB ∥CD ,∠C =115°,∠A = 25°,则∠E =. 5.如阁所示,AB ∥CD ,∠l =ll 0°,∠2=120°,则∠α=. 6.如图所示,AB ∥DF ,∠D =116°,∠DCB =93°,则∠B =. 7.如图,将三角尺的直角顶点放在直线a 上,a ∥b .∠1=50°,∠2=60°,则∠3的度数为.8.如图,AB ∥CD ,EP ⊥FP , 已知∠1=30°,∠2=20°.则∠F 的度数为.9.如图,若AB ∥CD ,∠BEF =70°,求∠B +∠F +∠C 的度数.10.已知,直线AB ∥CD .(1)如图l ,∠A 、∠C 、∠AEC 之间有什么关系?请说明来由;(2)如图2,∠AEF 、∠EFC 、∠FCD 之间有什么关系?请说明来由;(3)如图3,∠A 、∠E 、∠F 、∠G 、∠H 、∠O 、∠C 之间的关是.。

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2011精彩一模单项选择回顾( ) 1. Coul d you stop talking? I _____ my home work. I’ll have a test tomorrow.(昌平)A.am doingB. have doneC. woul d d oD. was doing( ) 2. --- Are these books ______ , Dad? (朝阳)--- Yes. I’m looking for them. T hank you.A.yoursB. hisC. hersD. theirs( ) 3. I’m alone at home. My parents ____ Shanghai on business and will be back next week.(朝阳)A.have been toB. have gone toC. has been toD. has gone to( ) 4. All the students in my class _____ hard-working. (朝阳)A.amB. isC. areD. be( ) 5. Grandma is sleeping. You _______ play the guitar. (朝阳)A.n eedn’tB. mustn’tC.wouldn’tD.won’t( ) 6. It’s very ni ce to visit New York _______ autumn. (石景山)A.inB. onC. atD. of( ) 7. --- Will you stay for lunch? (石景山)--- Sorry, I ______. My brother is coming to see me.A.n eedn’tB. can’tC. shouldn’tD. mustn’t( ) 8. --- Mother, how can I become smart? (西城)--- Sweet, you should fill your mind with new ideas. The more you read, _____ you are.A.smartB. smarterC. smartestD. the smarter( ) 9. --- Why do you like to be a truck driver, John? (西城)--- You know. I _____ by my boss to enjoy the beauty of the country.A.payB. paidC. am paidD. am paying( ) 10. I ______ an English book when the bell rang. (除西城)A.readB. will readC. am readingD. was reading( ) 11. We _______ for Dalian as soon as we get the train tickets. (全部)(if )A.leaveB. leftC. will leaveD. were leaving( ) 12. She ______ to her feet and ran out of the room just now. (石景山)A.jumpedB. jumpsC. was jumpingD. will jump( ) 13. Plan everything ahead, ________ you will live an easy life. (海淀)A.andB. butC. forD. or( ) 14. It is true that knowledge _________ instead of being taught. (海淀)A.learnsB. learnedC. is learnedD. was learned一模完型填空长句难句分析1.Some peopl e bring out the best in you in a way that you might never have fully realizes onyour own. My mum was one of those people. (石景山完型首句)2.You may not have started out life in the best situations. But if you can find a __47__ in lifeworth working for and believe in yourself, nothing can stop you.(石景山完型尾句)( ) 47. A. task B. hotel C. company D. word3.If you choose only to complain and run away from the suffering, it will always ___47__ youwherever you go. But if you decid e to be strong, the hardship will turn out to be a fortune on which new hopes will arise. (丰台完型尾句)( ) 47. A. foll ow B. catch C. disturb D. hurt4.“ Just keep __47__” is what I like to say. If there’s something you want to experience, search forit. If it’s something that is possible, make it happen. (朝阳完型尾段句)( ) 47. A. d oing B. moving C. living D. fighting5.“We make a living with what we get, but we make a life with what we give.”——Winston Churchill (昌平完型首句)6.I feel all the tiredness has gone after spending a day with them because I realize that there ismuch more to __47__ than money.. It is much more important to l ove and to be l oved. (昌平完型尾段句)( ) 47. A. life B. work C. love D. family7.Every night after dinner, my mother and I would sit at the kitchen tabl e. She woul d presentnew test, taking her __36__ from stories of amazing children she had read in newspapers and magazines. (西城完型首段首句)( ) 36. A. exampl es B. lessons C. notes D. ideas8.Before going to bed that night, I l ooked in the mirror in the bathroom and when I saw my facelooking back ---- and that it woul d always be this __43__ face ---- I began to cry. (西城完型)( ) 43. A. strange B. unhappy C. ugly D. ordinary9.The girl looking back at me was angry, strong. This girl and I were the same. I had newthoughts. I won’t let her __45__ me. I won’t be what I’m not. (西城完型)( ) 45. A. trouble B. change C. help D. teach10.The next day, she presented me some easier test. I found my pl easure and confidence backagain, and we started to be on the way to make me a prodigy (奇才)I coul d be. (西城完型尾段)11.“ I wanted to come out to thank you for __44__ song that you played. I have been very sick, andit’s very hard for me to get out of bed, but I really wanted to thank you for the song. It made me feel good.”……(密云完型)( ) 44. A. valuable B. pretty C. beautiful D. popular12.I was d eeply touched by her __45__ and felt a deeper understanding for the song. It was __46__to its name, returning to one’s heart to __47__ and joy. (密云完型尾段)( ) 45. A. kindness B. experience C. appreciation D. condition( ) 46. A. correct B. true C. right D. real( ) 47. A. sadness B. happiness C. peace D. honesty精彩完型填空:Some peopl e bring out the best in you in a way that you might never have fully realized on your own. My mom was one of those.My father died when I was nine months old, making my mom a single mother at the age of eighteen. Whil e I was growing up, we lived a very ___1___ life. We had littl e money, but my mom gave me a lot of love. Each night, she sat me on her lap and spoke the words that would ___2___ my life, “Kemmons, you are certain to be a great man and you can d o anything in life if you work hard enough to get it.”At fourteen, I was hit by a car and the doctor said I woul d never ___3___ again. Every day, my mother spoke to me in her gentle, l oving voice, telling me that no matter what those d octors said, I could walk again if I didn’t want to be bad enough. She ___4___ that message so deep into my heart that I finally be-lieved her. A year later, I returned to school –walking on my own.When the Great Depression (大萧条) ___5___, my mom lost her job. Then I left school to support (支撑) both of us. At that moment, I d ecided never to be ___6___ again.Over the years, I experienced various levels of business success. But the real ___7___ point hap-pened on a vacation I took with my wife and five kids in 1916. I was dissatisfied with the second-class hotels for families and was angry that they charged (收费) an extra $2 for each chil d. That was too ___8___ for most American families. I tol d my wife that I was going to open a hotel for families that woul d never charge extra for ___9___. There were pl enty doubters at that time.Not ___10___, mom was one of my strongest supporters. She worked behind the d esk and even de-signed the room style. As in any business, we experienced a lot of hard time. But with my mother’s words d eeply rooted in my heart, I ___11___ doubted we would succeed. Fifteen years later, we had the largest hotel system in the world – Holiday Inn. In 1979 my company had 1,759 inns in more than fifty countries with an income of $ 1 billion a year.You may not have started out life in the best situations. But if you can find a ___12___ in life worth working for and believe in yourself, nothing can stop you.1. A. quiet B. boring C. hard D. strange2. A. accept B. change C. disturb D. check3. A. study B. speak C. listen D. walk4. A. drove B. expected C. explain D. covered5. A. did B. hit C. cut D. fit6. A. excited B. brave C. patient D. poor7. A. leading B. breaking C. turning D. celebrating8. A. expensive B. fantastic C. different D. special9. A. husband B. parents C. children D. wife10.A. successfully B. surprisingly C. interestingly D. importantly11.A. always B. sometimes C. almost D. never12.A. task B. hotel C. company D. word精彩阅读理解: CThe rising costs of health are have become a problem for many countries in the world. To d eal with this problem, it is reported that a big part of the government’s health budget (预算) has been used for health education and disease prevention instead of treatment. Actually, many kinds of diseases are pre-ventabl e in many ways and preventing a disease is usually much cheaper than treating it. For exampl e, people coul d avoid catching a col d if they dressed warmly when the weather starts getting cold. But many people get sick because they fail to d o so, and have to spend money seeing a doctor.Daily habits like eating more healthy food would have kept millions of families from becoming bankrupt (破产) if the patients had taken ways for early prevention. For example, keeping a balanced diet (均衡饮食), such as not consuming too much animal fat and trying to have enough vegetables and fruits, seems to be quite important.One very effective and costl ess way of prevention is regular (定期的) exercise, which is necessary for a healthy mind and body. Regular exercise, such as running, walking, and playing sports is a good way to make people feel better.In addition, health education plays a key role in improving peopl e’s health. By giving people more information about health, counties coul d help peopl e understand the importance of disease prevention and ways to achieve it. For example, knowing one’s family medical history is an effective way to help keep healthy. Information about health probl ems among close relatives will make them aware of what they should do to prevent certain diseases through lifestyle changes, which will work before it is too late.However, paying more attention to disease prevention does not mean medical treatment is unim-portant. After all, prevention and treatment are just two different means toward the same effect. In con-clusion, we could save money on health care and treat patients more successfully if our country spends more money on health prevention and education.1.What’s the meaning of the underlined word “consuming” in Paragraph2?A.AvoidingB. ProducingC. EatingD. Cooking2.What’s the best title of the passage?A.Health or IllnessB. exercise or Illnessc.Prevention or Education D. Prevention or Treatment3.We can learn from the passage that ________.A.More health education shoul d be givenB.Dressing warmly can prevent diseasesC. A balanced diet is cheaper than regular exerciseD.The go vernment’s health budget shoul d be increased精彩阅读理解:DChristmas is a time for shopping. But I think those of us who live in large cities in Asia woul d be cheating ourselves if we said this is the only time we are busy shopping. No, from Bangkok to Singa-pore, from Shanghai to Manila, shopping - especially shopping in large shopping center--is ayear-round activity.Shopping centers are good. They show Asia’ surprising economic (经济的) growth, and how far we have come in such a short time. For many of the ol d er generation who can remember a time when eve-ryone lived in villages and there was no running water, the air-conditioned shopping center means comfort, choice, luxury (豪华) and better times.Now, it seems our usual activities happen in the shopping center—it’s where we shop, eat, watch movies, meet our friends or just generally walk around.Further more, we have come to regard shopping centers as important landmarks or tourist attrac-tions (吸引). Whole generations of Asians are growing up to think that, besides home and school, the shopping center is the most natural place to be.My idea about shopping centers is not that they are often big buildings that l ook quite different from other parts in a city, or that they promote (促进) shopping at a time when our planet can hardly afford it. My main idea about shopping centers is that they don’t really seem to make us happy. The large advertisements outsid e the stores could make us think that if we only had this pair of jeans, or if we hung out at this cafe drinking coffee, then we could feel more successful.Shopping centers , even though they try to look as welcoming as possibl e, can be unkind places. To make us buy, they must make us feel that we are short of something, or that everyone else has some-thing we do not yet own. We must want to surpass others or at the very least to keep up. How can this thought always trying to be cool bring us true joy?The sad dest thing is that the modern shopping center has stopped us from many beautiful, neces-sary and important activities. We have no one to blame (责怪) but ourselves. Instead of shopping, we coul d be cooking, visiting a nearby waterfall, going to the beach, reading a novel, taking a long walk, playing a sport, learning a dance or visiting each other’s homes.Every time we have a spare piece of land, all we can think of building on it is yet another shopping center. Perhaps instead, we should be building libraries, theatres, museums, sports halls, public swim-ming pools, parks—the list is endl ess. We might even consider leaving that land alone. This is something that the shopping center may have caused us to forget – in order to be happy, we must create as well as consume (消费).1.What is the writer’s attitud e towards shopping centers?A.He likes them very much.B. He doesn’t like them at all.c.He likes them only a little. D. He doesn’t like all of them.2.Why d o more and more shopping centers appear in some Asian countries?A.Because economy in the worl d devel ops very fast.B.Because shopping centers have attracted tourists all over the world.C.Because people go shopping in large shopping centers all year round.D.Because shopping centers have become an important part in everyone’s life.3.What is the greatest disadvantage of shopping centers, according to the writer?A.They d on’t seem to make us happy.B.They lead us to buy more and more things.C.They force us to give up many other activities.D.They have us fall into endless competition with others.4.Which of the foll owing is not true?A.It is very easy for us to find a shopping center in a big city.B.There are usually all kinds of services in a shopping center.C.The government must be responsibl e for the writer’s sadness.D.Besides shopping, there are many other activities we can enjoy海淀阅读 D“ You don’t have to be great to get started, but you have to get started to be great.” I believe it is thought normal in today’s society to just let life happen to us. I also believe that we sometimes damage our well-planned thoughts about success because it is easier to just carry on as usual rather than‘ try” with the possibility of failure in mind.The main reason why most people never get moving is because they have no real id ea about what they want. Without a certain result already set in your mind, it is really difficult to get going, and even if you d o, your motivation (动力) may soon disappear and you give up before too long.Why not consider what is really important in your life? Write d own what excites you, what would truly make you happy and what problems you have. At the end of the week, take a careful look at the notes you have direction you shoul d be heading.Knowledge is usel ess without action. You can read every book on any subject but your life will stay the same if you do not use that knowledge. This may seem clear but the reason why the self-help industry is thriving (繁荣的) is because people read and read and read but never use the information provided.Knowledge is fantastic but it is not life changing until used. I l ove to read personal development material to keep a positive attitude towards my life, but I also realize that if I d on’t set goals to achieve, then I will always be a talk the talk person who is great at giving advice but useless at realizing it. If you have to plans of practicing what you say, then it may be best to keep your mouth closed.Do you want to know who you are? Don’t ask. Act! Action will explain you. Whatever excuses we have for not living up to our talent, the fact is that time will always move forward. Be whatever you want to be and whatever you can be. Always remember the only limits we have are the ones we create for ourselves. Life is not what we think, it is what we experience when we act upon the thoughts we entertain.1.In Paragraph Two, the writer wants to _____________.A.tell us what people need to get successB.show us what people set in their mindrm us why people shoul d practiceD.explain why peopl e stop going ahead2.The und erlined phrase “ living up to” probably means ____________.A.matchingB. showingC. wastingD. losing3.What is the best title for the passage?A.See a Cl ear Picture of Life C. Get Started to Be GreatB.Set Goals to Achieve D. Act upon Thoughts阅读与表达的总结题:For many of us the home in our hearts is one we remember from chil dhood (童年时代). For me it was the real house I ever lived in. The house had a big front yard with a swing (秋千) on it. Marry is my sister. We were both 8 years old at that time, but we weren’t twins. I was in January, and she in Decem-ber. When it rained, we’d play there with neighborhood (街坊) kids, tell each other movies we’d been to, and sing rounds like “Row, Row, Row your boat.” I remember Mom putting newspapers on the kitchen tabl e. In that room, I also remember the more pl easing aroma(芳香) of dinner being cooked. They say smell is the strongest sense memory. I can still smell the soup. Whatever the dinner was, the family woul d always eat it every night in the dining room when Dad was home. After dinner, Marry and I woul d help with the dishes: I’d wash, and she’d dry. There was a lot of singing going on, too. In the living room there was the piano. Mom often played “That ol d Silver Moon” on it. Both Marry and I were taking piano l essons so there was much practicing. When the piano wasn’t playing, the radio was.The expression “Home Sweet Home”to me, is the memory of voices and faces in that place on Thanksgiving and Christmas, of other family members– grandparents, aunts, uncles, cousins, and the little d og named Inky. It’s not the rooms of that house I think of so much as what went on there. It’s al-ways the people, the singing, laughing, and joking – and occasionally quarreling (吵架)and crying. Quite often, come to think of it. You go back and look at a house all these years later, and it seems so different now, much smaller than you remember. And you realize that if it’s still there at all, it has to be basically what it was. It’s not the brick (砖头), the shape, or size that matters. It’s us who have changed.1.Are Mary and the writer twins?2.Does the writer have a small family or a big family?3.What did the writer usually do after dinner?4.Why d oes the house l ook small er to the writer now?5. What’s the writer’s memory?书面表达2011材料作文写作技巧范文分析1.It’s very necessary for everyone to read books in his life. To my surprise, recently fewer and fewer people read books in their spare time. I think reading can not only bring us happiness, make us relaxed, but also make us l earn more knowledge about the worl d.As a student, I am usually very busy studying, but I can read books as long as I have time. I do some reading at least half an hour after finishing my homework every day. At weekends it always takes me an hour to read. I have kept on reading for several years so that I have had the benefit of reading. We tee-nagers shoul d manage to find time to read as many books as possible.The more books you read, the wiser you will be. (134)2.It’s necessary for us teenagers to take part in activities after school.I think activities after school can not only help us widen our eyes, but alsomake us grow up healthily.I am a middle school student. After school, I often take part in different school activities as long as I have time, such as computer science, basketball, chess, spoken-English and so on. Of all, I like com-puter science best, so I join the computer group. I learn surfing on line and d ownl oading music from the Internet in order to get as much information as possible . I learn English on line as well.By taking activities, you may become wiser and get more skills for social need. ( 122 )3. Last week we had a class activity to help more peopl e know about how to save energy in our life. First, we gave out some posters to people at the gate of school, and then we gave a speech on how to save water and electricity. Finally, we ac ted in a play called “Our Earth” with the students from some other schools.I think the activity was very successful and interesting.In the future, I will do a lot to save energy in my life. First of all, I will go to school by bike instead of by car. What’s more, I will turn off the lights or computers as long as I l eave a room. Besides, I will try to use things that can be recycled in order to protect the environment.If everyone does something for the environment, the earth will be a better place . ( 144 )4.It’s time for us to graduate from our school. Look back our three-year school life, I want to tell something about my best friend—Mary. As a student, she is hard-working and really good at Chinese and English as well as interested in all the subjects we learnt at school. She is very friendly and always ready to help others so that she gets on well with her classmates and friends. What’s more, she is out-going. She enjoys taking part in all kinds of school activities as long as she has time, such as dancing, drawing and so on. She often joins in competitions and has won many prizes. I feel proud of her as her best friend.After this summer vocation, we may go to different schools for further study, But I’m sure that we’ll be good friends forever. ( 140 )6.From the survey we know that some students often buy a lot of snacks, others spend much money on mobil e phones. As a student, I woul d d o two things as long as I have pocket money. I woul d spend some money on the books that I’m interested in because I think they can not only bring me happiness, make me relaxed but also give me much more knowl edge about the world. On the other hand, I can save the money in order to pay for more meaningful things in the future. We teenagers should have agood habit of spending money in a proper way. (105 ) 海淀昌平完型填空“ We make a living with we get, but we make a life with we give”---- Winston ChurchillI believe that saying, I have been ___1___ at the Boston Children’s Hospital every year since I was thirteen At the beginning, I only wanted to go ___2___ I would make fun with children at the hospital. Af-ter giving my time for 40 months, my life has been changed ___3___.When I first ___4___ into the waiting room on the ground fl oor, I was very ___5___ that I woul d be spending my whole summer with kids. As I got used to showing up every day at 8 a.m., many kids began to ___6___ me. To my surprise, I began looking forward to seeing their happy faces as well. They were always excited about ___7___. My heart warmed every time I heard their excited voices asking me for a story or an answer to a question. I felt ___8___ and no one coul d take my place. I l ook back, I see the in-fluence that these special children have had on me. It is because of them that I have __9__ a strong wish to become a psychol ogist, a person who studies the science of children’s mind. Recently, I have been asked to help out on many different fl oors ___10___ the waiting room where I started. The kids on the fl oors above are usually there for a l onger time. With their worries and wishes to get better and go home, they always offer me a ___11___ smile. I feel all tiredness has gone after spending a day with them because I realize that there is much more to ___12___ than money. It is much more important to l ove and to be l oved.1. A. living B. studying C. staying D. volunteering2. A. unless B. until C. because D. so3. A. seriously B. probably C. immediately D. completely4. A. looked B. stepped C. turned D. ran5. A. worried B. excited C. nervous D. pleased6. A. notice B. like C. protect D. prevent7. A. smiling B. sleeping C. learned D. playing8. A. independent B. surprised C. moved D. valued9. A. devel oped B. remembered C. worked D. improved10.A. in B. with C. besid es D. before11.A. sick B. bright C. sad D. pitiful12.A. life B. work C. love D. family丰台阅读CNever go into a supermarket hungry! This is a good piece of advice. If you go shopping for food before lunchtime, you’ll probably buy more than you plan to. Unfortunately, however, just this advice isn’t enough for shoppers these days. Mod ern shoppers need an education in how and how not to buy things at the store. First, you check the weekly newspaper ads. Find out the items that are on sale and decide if you really need these things. In other words, don’t buy anything just because it’s cheaper than usual! Second, never let “ New and Improved!” or “ All natural” on the front of a package influence you. Instead, read the list of contents on the back. Third, compare prices: that is you should examine the prices of both different brands (品牌) and different sizes of the same brand.Another suggestion for shoppers is to buy ordinary items instead of famous brands. Ordinary items in supermarkets come in plain packages. These products are cheaper because producers d on’t spend much money on packing or advertising. However, they are still of high quality. In the same way, in buying clothes, you can often find high quality and low prices in brands that are not famous. Shop-ping in discount clothing stores can help you save a lot of money. Although these stores aren’t very at-tractive, and they usually d o not have individual dressing rooms, not only are the prices l ow, but you can often find the same famous brands that you find in high – priced department stores.Wise shoppers read magazine ads and watch TV commercials (商业广告), but they do this with one advantage: knowl edge of the psychology behind the ads. In other words, will—informed shoppers watch for information and check for misinformation. They ask themselves questions: Is the advertiser hiding something in small print at the bottom of the page? Is there any real information in the com-mercial, or is the advertiser simply showing an attractive image? With the answers to these questions, shoppers can make a wise choice.1.The author gives ________ suggestions to the shoppers in the passage.A.ThreeB. fourC. fiveD. six2.We can learn from the passage that _________.A.ordinary items are not so attractive because of the l ower pricesB.we can’t buy items with words like “New and Improved” or “ All Natural”C.the advertisers are always showing misinformation in the commercialsD.the quality of ordinary items can be as good as that of famous brands3.The author’s main purpose of writing the passage is to advise shoppers __________.A.to buy ordinary items instead of famous brandsB.how to buy ordinary items in supermarketsC.how to make a proper decision while shoppingD.not to believe advertisements or commercials丰台阅读DMany strong and out-of-control emotions are recognized as an illness. Peopl e who are always very sad have depression (抑郁症); those who worry a lot have anxiety.But what about anger problems? Anger is largely viewed as a secondary emotion – one caused by other emotions. Peopl e are thought to be angry because they are sad, anxious or stresses. In the past, many doctors didn’t accept the idea that anger coul d be a probl em all on its own.Today, though, a growing number of mental health experts think that anger is a serious probl em that needs its own treatment.How to tell the difference between “ normal” anger and “ anger problem” is difficult. After all, eve-ryone gets really mad from time to time. Experts point out a few ways.Disordered anger, as it is sometimes called, tends to be greater intensity (强度). It takes very little to set off a person with an anger problem, and their responses (反应) are very strong. An example: Whil e most peopl e woul d get upset if a driver cut them off, someone with disordered anger might try to chase d own the car and force it off the road.。

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