杨浦高中补习班杨浦培训机构新王牌数学资料7

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杨浦区最好高考补习班 新王牌高考补习 数学一元二次不等式

杨浦区最好高考补习班 新王牌高考补习 数学一元二次不等式

yxO杨浦新王牌一元二次不等式的解法一、复习1、一元一次不等式的解法依据是不等式的基本性质3(乘法性质):如果0,>>c b a ,那么bc ac >;如果0,<>c b a ,那么bc ac <.2、二次函数()02≠++=a c bx ax y 的图像。

二、新课(一)一元二次不等式的定义1、只含有 未知数,并且未知数的最高次数是 的 不等式叫做一元二次不等式。

2、一元二次不等式的一般形式为: 。

(二)一元二次不等式的解法探究 1、如何解一元二次不等式0322>--x x ?解法一:先分解因式,转化为一元一次不等式组求解。

解法二:求此不等式的的解集可看作求二次函数322--=x x y 取正值时x 的取值范围,即求该二次函数的图像在x 轴上方时x 的取值范围。

2、根据二次函数322--=x x y 的图像,得 一元二次不等式0322<--x x 的解集是 ; 一元二次不等式0322≥--x x 的解集是 ; 一元二次不等式0322≤--x x的解集是 。

3、已知一元二次方程02=++c bx ax 的根的判别式042>-=∆ac b , 则此方程有两个不等实数根,不妨设为21,x x ,且21x x <, 作出对应二次函数c bx ax y ++=2的图像,由图可得:一元二次不等式)0(02>>++a c bx ax 的解集是 ; 一元二次不等式)0(02><++a c bx ax 的解集是 ;【拓展】若0<a ,则一元二次不等式02>++c bx ax 的解集是 ;一元二次不等式02<++c bx ax 的解集是 。

(三)用区间表示不等式的解集设b a 、都为实数,并且b a <,我们规定: (1)集合}|{b x a x ≤≤叫做 区间,表示为 ; (2)集合}|{b x a x <<叫做 区间,表示为 ;(3)集合}|{b x a x <≤或}|{b x a x ≤<叫做 区间,分别表示为 或 ; (4)实数集R 表示为 ;集合}|{a x x ≥表示为 ; 集合}|{a x x >表示为 ;集合}|{b x x ≤表示为 ; 集合}|{b x x <表示为 ;在上述所有的区间中,b a 、叫做区间的 ; “∞-”读作“负无穷大”,“∞+”读作“正无穷大”。

上海杨浦区效果最好的补习班 小学补习班 初中补习班

上海杨浦区效果最好的补习班 小学补习班 初中补习班

上海杨浦区效果最好的补习班小学补习班初中补习班目录:第一篇了解新王牌第二篇特色优势第三篇选择理由第四篇开设课程第五篇荣耀榜单第六篇环境、教学第一篇新王牌采用“小班化教学〞形式,它的产生顺应了素质教育的需要,为学生提供了平等的受教育气氛,让受教育者能比较充分地享受教育资源。

它具有大班教学无法比较的优势:学生人数少使教育教学环节紧凑,能为学生提供更加广阔的自我表现,从而实现因材施教;“小班化教学〞目前也是欧美地区主要的班级模式,由于人口基数大,我们国家的学校只能选择大班模式。

一、新王牌小班教育理念:用爱心激发学生兴趣;用知识照亮学生心灵;用方法培养学生技能。

二、新王牌小班教学方法:注重因材施教;讲究教学互动;强化思维训练;提高学习能力;促成习惯养成。

三、新王牌精品小班特色:中学生的学习研究与培训相结合;思维训练与目标鼓励相结合。

四、新王牌精品小班教育的优势:1、重点师资团:教师梦之队,98%是重点中学高中老师,对高中教材熟悉,甚至还有参加过高考阅卷工作资深老师。

2、小班化教学:目前培训市场的教学班人数,一般在40-60人左右,有的多达200人,而我们是真正的小班,分为6~10人,10~15人,15-25人及家教定制小班三种。

小班教学,比大班教学,不仅有师生之间互动性强、学生表现时机多、老师有精力兼顾所长、培养学生注意听讲等优势,而且与单个家教相比,它有益于学生之间的交流和培养合作意识〔防止独生子女的孤独和缺乏交际问题〕,更有益于时间的合理分配以及形成进取的争先动力等。

3、课堂效率高:采用“知识梳理+课堂互动〞先进方式,每次2~2.5小时,每次课内容量大,同时根据人体学习科学设置课程时间,相比一般补习班“做卷子〞模式,学习效率提高50~80%,性价比也比一般辅导班超过50%以上。

4、性价比好:现在培训市场上,大班的教育培训费,单科每小时在40至80不等〔50人,效果差〕,一线教师的家教费在120至250不等〔费用贵,但一般家长难以承受〕,而我们的课时费用在一线专业教师家教费用的2/3左右,相当于家教德效果又比家教廉价,并防止了自控力差的孩子在大班学习由于注意力不集中收获不大、既浪费时间又浪费金钱的现象。

上海杨浦区最好的补习班 新王牌初一数学李G老师拓展提高

上海杨浦区最好的补习班 新王牌初一数学李G老师拓展提高

上海杨浦区最好的补习班新王牌初一数学李G老师拓展提高work Information Technology Company.2020YEAR杨浦新王牌初一数学期中复习题型一:1. 下列语句正确的是( )A. 5-是5的一个平方根;B. 400万有7个有效数字;C. 近似数12.8和12.80表示的意义是相同的;D. 一个数的平方根与其立方根相同,则这个数是1.2. 下列语句中错误的是( )A.数轴上的每一个点都有一个实数与它对应;B.0.087用科学计数法可表示为2107.8-⨯;C.据报道:2007年2月18日起,整存整取的三年期定期存款的年利率为3.96%,其中3.96% 这个数是近似数;D.据统计某校7班有45名学生,其中45这个数是准确数.3.下列说法正确的是……………………………………………………( )(A) -81平方根是-9; (B)81的平方根是±9; (C)x x x 22=+; (D)521+-a 一定是负数.4. 一个自然数的正的平方根为m ,则下一个自然数的正的平方根为( ) A.1+m ; B.12+m ; C.m+1; D;12+m5. 下列说法正确的是( )A.如果两个角相等,那么这两个角是对顶角;B.经过一点有且只有一条直线与已知直线平行;C.如果两条直线被第三条直线所截,那么内错角相等;D.连接直线外一点与直线上各点的所有线段中,垂线段最短.6. 下列说法正确的是( )A. 一对同旁内角的平分线互相垂直;B. 垂直于同一条直线的两条直线互相垂直;C. 邻补角的平分线互相垂直;D. 过一点至少有一条直线与已知直线垂直.7. 下列结论正确的是( )A.过一点有且只有一条直线与已知直线平行;B.平行于同一条直线的两条直线平行;C.两条直线被第三条直线所截,同位角相等;D.不相交的两条直线必平行.8. 如图,以数轴的单位长度为边作一个正方形,以数轴的原点为圆心,正方形对角线长为半径画弧,交数轴正半轴于点A ,则点A 表示的数是( )A. 211; B. 1.4; C.3; D. 29. 如图,下列判断: ①∠A 与∠1是同位角;②∠A 与∠B 是同旁内角;③∠4与∠1是内错角;④ ∠1与∠3是同位角. 其中正确的个数是( )A. 4个;B. 3个;C. 2个;D. 1个10. 如图,图中同旁内角的对数是()A.2对;B.3对;C.4对;D.5对11. 如图所示,把一个长方形纸片沿EF折叠后,点D、C分别落在'D、'C的位置,若∠EFB=700,则'∠等于()AEDA.700B.650C.500D.400题型二:1.2)9(-的平方根为___________2.如果实数b在数轴上对应的点到12b= .3.若m ,小数部分是n ,则()3m m += .4. 如果264a =,那么13a-= .5. 21.35=213.5=,则x :y = .6. 已知数轴上点A 到原点的距离为1,那么在数轴上到点A 的距离为3的点所表示的数有_________个;7.20y +=,则x y += .8. 近似数510008.2⨯精确到______位,它有_____个有效数字.9. 已知()()811=--+-b a b a ,则_______=-b a .10. 已知a a =3,b b =,c c =3,则______=++c b a11. 若732.13=,则__________30000=.12. 若01.5≈a ,则a 的取值范围为________.13. 若111+-+-=x x y ,则________20102010=+y x .14. 计算:._________5757312121312121=⎪⎪⎭⎫⎝⎛+⎪⎪⎭⎫ ⎝⎛-15. 若两条直线平行,则一对同旁内角的平分线互相 .16. 如图,写出图中∠A 所有的内错角:___________________.17. 如图,正方形ABCD 的面积为5,正方形BEFG 的面积为4,那么△GCE 的面积是___.18. 如图,把矩形ABCD 沿EF 进行翻折,若150∠=,则AEF ∠=______度.19. 如图,把△ABC 纸片沿DE 折叠,点点A 落在四边形BCDE 内部时,则∠A 、∠1、∠2之间的数量关系是________.20. 观察:52252458522=⨯==-;1033103910271033=⨯==-; 猜想:2655-=__________;并通过类似的计算验证你的猜想. 21. 如图,AD ∥EF ∥BC ,AC ∥MF ,与∠FMB 相等的角有______个.1FE D CB A (第18题22. 按虚线剪去长方形纸片相邻的两个角,并使∠1=1300,AB⊥BC,∠2=______0.23. 如图:AB∥CD,则:∠1+∠2+∠3+∠4的度数为__________.24.如图,m∥n,若过点P作DP∥m,则∠1、∠2、∠3之间的数量关系为__________25. 如图,若过点P、2P作直线m的平行线,则∠1、∠2、∠3、∠4间的数量关系是1_______.26. 如图,m∥n,则∠1、∠2、∠3、∠4、∠5间的数量关系是_______.题型三:1. 利用幂的运算性质计算:662284÷⨯2. 利用幂的运算法则计算:4648832÷⨯.3. 已知:51=+x x ,求x x 1-的值.4. 已知a 、b 为实数,且满足233+-+-=b b a ,求b a ab ab +-⋅1的值.5. 如图,已知AB ∥CD ,分别写出下面四个图形中∠APC 和∠PAB 、∠PCD 的数量关系,再请你从所写出的四个数量关系中任选一个,说明该数量关系的正确性.数量关系:(1)____________;(2)______________;(3)____________;(4)_______________________.选择:______________说明理由:6. 如图,已知AD ∥BC.(1)找出图中所有面积相等的三角形,并选择其中一对说明理由;(2)如果BE ⊥AC ,CF ⊥BD ,垂足分别为E 、F ,43 BD AC ,求CF BE 的值.(直接写出答案)7. 已知PE ∥BA ,PE 交BC 于E ;PF ∥BC ,PF 交BA 于F ,PH ⊥BA ,垂足为H(1)如图:若∠FPH=430,则∠ABC=______0(2)若∠ABC=720,则∠FPH=______0(3)如果∠ABC 是一个钝角,那么点F 和点B 在点H 的______(填“同”或“异”)(4)当∠ABC=1500,BE=BF=3cm 时,画出图形并求出∠FPH 的大小.8. 先阅读下列的解答过程,然后再解答; 形如n m 2±的化简,只要我们找到两个正数a 、b ,使m b a =+,n ab =,使得()()m b a =+22,n b a =⋅,那么便有:()()b a b a b a n m >±=±=±22 例如:化简347+ 解:首先把347+化为1227+,这里m=7,n=12,由于4+3=7,4×3=12 即()()73422=+,1234=⋅所以347+=1227+=()32342+=+ (1)填空:_________324=-,_________549=+(2)化简:15419-9. 观察下列各式及其验证过程: 验证:322322+=; 验证:()()322122122122223232222233+=-+-=-+-==; 验证:833833+=; 验证:()()833133133133338383322233+=-+-=-+-==. (1)按照上述两个等式及其验证过程的基本思路,猜想1544的变形结果并进行验证;(2)针对上述各式反映的规律,写出用n(n为任意自然数,且n》2)表示的等式,并给出证明.11。

杨浦高中补习班杨浦暑假补习班新王牌给您优质选择高二学生稿

杨浦高中补习班杨浦暑假补习班新王牌给您优质选择高二学生稿

一.填空题(本大题满分56分)本大题共有14题,考生应在答题纸相应编号的空格内直接填写结果,每个空格填对得4分,否则一律得零分. 1. 抛物线2x y =的准线方程是 .2. 方程222424x xC C =的解为 . 3. 在5(31)x -的展开式中,设各项的系数和为a ,各项的二项式系数和为b ,则ab= . 4. 若圆锥的侧面展开图是半径为2、圆心角为90︒的扇形,则这个圆锥的全面积是 . 5. 某同学有同样的画册2本,同样的集邮册3本,从中取出4本赠送给4位朋友,每位朋友1本,则不同的赠送方法共有 种.6. 将4个不同的球任意放入3个不同的盒子中,则每个盒子中至少有1个球的概率为 .(结果用最简分数表示)7. 已知123F i j k =+- ,223F i j k =-+- ,3345F i j k =-+ ,若1F 、2F 、3F共同作用于一个物体上,使物体从点1M (1,-2,1)移到点2M (3,1,-2),则合力所做的功为 . 8. 抛物线24y x =的准线与x 轴的交点为K ,抛物线的焦点为F ,M 是抛物线上的一点,且||2||FM FK =,则△MFK 的面积为 .9. 在圆周上有10个等分点,以这些点为顶点,每3个点可以构成一个三角形,如果随机选择了3个点,刚好构成直角三角形的概率是 . 10. 如图,在由二项式系数所构成的杨辉三角形中, 第_____行中从左至右第14与第15个数的比为3:2.11. 边长分别为a 、b 的矩形,按图中所示虚线剪裁后, 可将两个小矩形拼接成一个正四棱锥的底面,其余恰好拼接 成该正四棱锥的4个侧面,则ba的取值范围是 . 12. 已知平面α截一球O 得圆M ,圆M 的半径为r ,圆M 上两点A 、B 间的弧长为2rπ,又球心O 到平面α的距离为r ,则A 、B 两点间的球面距离为 . 13.若对于任意实数x,都有()()()()2344012342222x a a x a x a x a x =++++++++第0行 1第1行 1 1 第2行 1 2 1 第3行 1 3 3 1 第4行 1 4 6 4 1 第5行 1 5 10 10 5 1 …… …… ……,则3a 的值为 .14. 给n 个自上而下相连的正方形着黑色或白色. 当4n ≤时,在所有不同的着色方案中,黑色正方形互不相邻的着色方案如图所示:由此推断,当6n =时,黑色正方形互不相邻的着色方案共有 种,至少有两个黑色正方形相邻的着色方案共有 种. (直接用数字作答)二.选择题(本大题满分20分)本大题共有4题,每题有且只有一个正确答案,考生应在答题纸的相应编号上,填上正确的答案,选对得5分,否则一律得零分. 15. 经过原点且与抛物线23(1)4y x =+-只有一个公共点的直线有多少条? ( ) A. 0 B. 1 C. 2 D. 316. 正四面体ABCD 的表面积为S ,其中四个面的中心分别是E 、F 、G 、H .设四面体EFGH 的表面积为T ,则TS等于 ( ) A.49 B. 19 C. 14 D. 1317. 甲乙两人一起去游园,他们约定,各自独立地从1到6号景点中任选4个进行游览,每个景点参观1小时,则最后一小时他们同在一个景点的概率是 ( ) A.136 B. 19 C. 536D. 1618. 给出下列四个命题:(1) 若平面α上有不共线的三点到平面β的距离相等,则//αβ; (2) 两条异面直线在同一平面内的射影可能是两条平行直线;(3) 两条异面直线中的一条平行于平面α,则另一条必定不平行于平面α; (4) a 、b 为异面直线,则过a 且与b 平行的平面有且仅有一个.其中正确命题的个数是 ( ) A. 0个 B. 1个 C. 2个 D. 3个三.解答题(本大题满分74分)本大题共5题,解答下列各题必须在答题纸相应编号的规定区域内写出必要的步骤 . 19.(本题满分12分)已知矩形ABCD 内接于圆柱下底面的圆O ,PA是圆柱的母线,若6AB =,8AD =,异面直线PB 与CD 所成的角为arctan 2,求此圆柱的体积.20.(本题满分14分)本题共有4个小题,第1小题满分3分,第2小题满分3分,第3小题满分4分,第4小题满分4分.m 个元素环绕在一条封闭曲线上的排列,称为环状排列.已知m 个不同元素的环状排列的所有种数为(1)!m -.请利用此结论来解决下列问题,要求列式并给出计算结果. (1)从10个不同的元素中选出8个元素的环状排列的所有种数为多少?(2)某班8个班干部中有1个班长,2个副班长,现在8个干部围坐一张圆桌讨论班级事务,则分别满足下列条件的此8人的坐法有多少种? (i )班长坐在两个副班长中间; (ii )两个副班长不能相邻而坐; (iii )班长有自己的固定座位.21.(本题满分14分)本题共有2个小题,第1小题满分7分,第2小题满分7分 .如图,在四棱锥P ABCD -中,底面ABCD 是矩形,PA ⊥平面ABCD ,2AP AB ==,4AD =,E F 、依次是PB PC 、的中点.(1)求直线EC 与平面PAD 所成的角(结果用反三角函数值表示); (2)求三棱锥P AFD -的体积.22.(本题满分16分)本题共有3个小题,第1小题满分4分,第2小题满分6分,第3小题满分6分.如图,点P 为斜三棱柱111C B A ABC -的侧棱1BB 上一点,1BB PM ⊥交1AA 于点M ,1BB PN ⊥交1CC 于点N .FE D B CAPAA 1B 1B C 1MN P(1)求证:MN CC ⊥1;(2)在任意DEF ∆中有余弦定理:DFE EF DF EF DF DE ∠⋅-+=cos 2222.拓展到空间,类比三角形的余弦定理,写出斜三棱柱的三个侧面面积与其中两个侧面所成的二面角之间的关系式,并予以证明.(3)在(2)中,我们看到了平面图形中的性质类比到空间图形的例子,这样的例子还有不少.下面请观察平面勾股定理的条件和结论特征,试着将勾股定理推广到空间去.请在答题纸上完成上表中的类比结论,并给出证明.23.(本题满分18分)本题共有3个小题,第1小题满分4分,第2小题满分6分,第3小题满分8分.在平面直角坐标系中,O 为坐标原点. 已知曲线C 上任意一点(,)P x y (其中0x ≥)到定点(1,0)F 的距离比它到y 轴的距离大1. (1)求曲线C 的轨迹方程;(2)若过点(1,0)F 的直线l 与曲线C 相交于A 、B 不同的两点,求OA OB ⋅的值;(3)若曲线C 上不同的两点M 、N 满足0OM MN ⋅= ,求ON的取值范围.。

杨浦中考补习班杨浦高考补习班新王牌给你最合适的选择学生版7.10高二新世纪Unit1练习册

杨浦中考补习班杨浦高考补习班新王牌给你最合适的选择学生版7.10高二新世纪Unit1练习册

根据课文完成词组翻译:Reading:1.饮食风格2.实在和一成不变的饮食3.由…组成4.一个移民国家5.有种类繁多的民族风味饮食6.布满了供应世界各地特色饮食的饭店7.更认真地考虑身体健康8.未经加工的食品9.含有防腐剂10.热衷于健康食品11.以豆类为食12.在全国各地(数量)快速增加13.在吃上浪费时间14.在短时间内接待数百人15.美国人对饮食的态度16.开始重新审视饮食的社会意义17.花时间休息18.在汉堡摊前匆忙应付一顿午餐Additional reading:1.独特而新颖的准备食物的方法2.除了3.使这些菜味道香浓4.和饭桌上每个人分享开胃菜5.变得习惯于6.开阔视野7.变化是生活的调味品单元小测试:Grammar and VocabularySection A (1-13: Grammar; 14-20:Vocabulary)1.________ ambitions are well worth having, they are not to be cheaply won.A. UntilB. IfC. SinceD. Although2.If there are must be trouble, let it be in my day, _____ my children may have peace.A. so thatB. becauseC. thereforeD. thus3.I had already printed twenty pages _____ I noticed the page numbers were all wrong.A. whenB. whileC. unlessD. until4.Parents tend to judge the simplified books as being less important in helping their childrenimprove reading _____they grow older and become more independent.A. thatB. asC. unlessD. until5.Such individuals ______ take up this role often find life frustrating.A. asB. thatC. whomD. who6.When you have eliminated the impossible, _____ remains, however improbable, must be thetruth.A. whichB. whatC. whicheverD. whatever7.______ people fall in love, they become liars.A. During the minute whenB. The minute whenC. The minuteD. Since the minute when8.Presenteesim refers to the feeling that one must show up for work _____ one is too sick,stressed, or distracted to be productive.A. even ifB. untilC. sinceD. as if9.All truths are easy to understand _____ they are discovered.A. onceB. unlessC. untilD. though10.We need two kinds of friends, one to complain to, _____ to the other we boast.A. whenB. whileC. whereD. what11.As we go into the new century, we need to be ready to go with the winds of trust, conscienceand intuition. ______ we are open to the unexpected and are alert and are adaptable, life will become a wonderful journey.A. UntilB. UnlessC. ThoughD. If12.Time tries friends ______ fire tries gold.A. whenB. asC. likeD. what13.It is _____ everyone recognizes beauty as beauty that the idea of ugliness exists.A. thatB. becauseC. whyD. forrge numbers of birds _____ south every winter.A, immigrate B. emigrate C. migrate D. face15.We all hope that efforts to _____ the peace won’t fail.A. protectB. containC. preserveD. include16.She has no close relatives _____ one sister.A. rather thanB. other thanC. except forD. more than17.He wasn’t _____ on the plan, but we managed to bring him round.A. crazyB. keenC. eagerD. happy18.Water _____ as it freezes.A. expandsB. extendsC. stretchesD. grows19.His story was ______ as the best by the judges.A. picked upB. picked outC. picked atD. picked on20. The new rules actually work _____.A. to our tasteB. in favourC. in our favourD. to our favourSection B(A)Packed with fibers that ______help to lower cholesterol (胆固醇),okra(秋葵) also contains nearly 10% of daily recommended levels of vitamin B6 and folic acid, And _________ it is relatively simple to grow in warm climates, okra is becoming popular in north and south China. “ It was the _________(prefer) vegetable for the Olympic athletes of the Beijing Olympic Games,”says Kantha Shelke, _______food scientist at Corvus Blue LLC and spokesperson for the Institute of Food Technologist (IFT). And Okra may have some other effects. “The polysaccharides in okra ________ (think) to open up the arteries.” she says.While okra is a popular staple(原料) in some international cuisines, Americans ___________(still warm) up to the vegetable. According to Shelke, who studies food trends, okra chips are gaining popularity in the appetizer menus of Indian and vegetarian restaurants. And at the New York City Greenmarket, Eugena Yoo of Lani’s Farm in Bordentown, New Jersey talks about _______ immigrant communities are attracted to the in-season vegetable. They tend to recognize it and are aware of ______ health benefits.(B)Two common types of body decoration in tribal societies are tattooing and scarification. A tattoo is a design or mark made by _______ (put) a kind of dye (usually dark blue) into a cut in the skin. In scarification, only dirt or ashes are put into the cuts __________ dye. In both of these cases, the result is a design _______ is unique to the person’s tribe. Three lines on each side of a man’s face identify him as a member of the Yoruba tribe of Nigeria. A complex geometric design on a woman’s back identifies her as Nuba, also _________ (make) her ________ (beautiful) in the eyes of her people.In some societies, women overeat to become plump because large women are considered beautiful, ________skinny ones are regarded as ugly. A woman’s plumpness is also an indication of her family’s wealth. In other societies, by contrast, a fat person is considered unattractive, so men and women eat little and try ________ (remain) slim. In many parts of the world, people lie in the sun for hours to darken their skin, while in other places light, soft skin is seen as attractive. People with gray hair often dye it black, whereas whose ______ naturally dark hair often change its color to blond.Section CA. remainedB. traditionalC. expansionsD. appetizersE. ingredientsF. variedG. combinationH. creativeI. flavorJ. laidK. importedRussian cuisine is diverse, as Russia is by area the largest country in the world. Russian cuisine derives its _____ character from the vast and multi-cultural expanse of Russia. Its foundations were ______by the peasant food of the rural population in an often harsh climate, with a _____ of plentiful fish, poultry, game, mushrooms, berries, and honey. Crops of rye (黑麦), wheat, barley(大麦) and millet(小米)provided the ______ for a plethora of breads, pancakes, cereals, beer and vodka. Soups and stews full of ______ are centered on seasonal or storable produce, fish and meats. This wholly native food _____ the main food for the vast majority of Russians well into the 20th century.Russia’s great _____ of culture and influence during the 16th-18th centuries brought more refined foods and culinary techniques. It was during this period that smoked meats and fish, pastry cooking, salads and green vegetables, chocolate, ice cream, wine, and juice were ______from abroad. This opened the doors for the ______ integration of these new foodstuffs with ________Russian dishes. The result is extremely varied in technique, seasoning, and combination.Reading ComprehensionSection APeople around the world have eaten carrots for thousands of years, and food historians estimate that we have been enjoying orange carrots since the 1500s. Orange appears to be _____ in the carrot world, however, ______ scientists working for the U.S. Department of Agriculture (USDA) and other institutions have been ____ more colorful versions- think bright yellow, purple and red- to market. These rainbow-hued carrots grow around the world in countries in Central Asia in the Mediterranean, but are still _____ in the United States.Why the fuss? It’s not just about the color; researchers with the Agricultural Research Service at the Vegetable Crops Research Unit in Madison, Wisconsin have been playing with carrot stocks to ______ even more nutrients into the antioxidant-rich vegetable. The team is led by plant geneticist Philipp Simon, who has been carrot-obsessed for 35 years. “____ we were looking at how to make a more uniformly orange carrot, _____ consumers were shown to _____ a solid color,” says Simon, “_____ in the 1980s there was a lot of information from nutritionists about the nutritional quality of pigment(色素). So we are trying to develop carrots that are unusual, but still ____ to consumers.”Simon and his team not only want the carrots to be easy for American farmers to_____, but they want them to taste good and offer greater _____ benefits too. ______ Simon’s efforts, carrots today have about 75%_____ beta-carotene (a pigment used by the body to make vitamin A) than the carrots available 25 years ago. His team at the University of Wisconsin partners with USDA’s Agricultural Research Service, which supports scientists _____ ways to improve Americans’ nutritional intake.1. A. behind time B. out of fashion C. in trouble D. beyond reach2. A. though B. when C. since D. examining3. A. expanding B. extending C. exploring D. examining4. A. new B. old C. different D. various5. A. breed B. establish C. originate D. fill6. A. in fact B. At first C. In turn D. In particular7. A. so B. and C. but D. since8. A. favour B. hate C. hold D. serve9. A. for B. so C. and D. but10.A. available B. accessible C. essential D. acceptable11. A. settle B. grow C. eat D. buy12.A. financial B. health C. social D. long-term13.A. Contrary to B. In addition to C. Thanks to D. In terms of14.A. much B. little C. more D. less15.A, picking up B. working on C. rushing through D. thinking aboutEach year, millions of people around the world apply to study at American colleges or universities. The most widely used college admissions test is called the S-A-T. More than 3 million of the tests were given last year.The S-A-T was first used for college admissions in 1926. Its purpose was to help college officials identify which students would be successful in college. Critics say the test has not always done this. Research suggests that students from rich families do better on the S-A-T test than students whose parents are poor. For example, many rich students are able to improve their scores on the test after taking costly preparation classes. Critics also say many African-American and Hispanic (西班牙裔)teenagers score lower on the test than students of other ethnic groups.The College Board is a non-profit higher education association that owns the S-A-T. It recently announced major changes in the test. It says the news S-A-T will better test a student’s reasoning and thinking skills. Education experts say the new test will show how well students have learned material taught in high school. The first change will end analogy questions on the S-A-T. Analogies are words with meanings that are linked. Critics have said that such questions show only a knowledge of words, not reasoning skills. The analogy questions will be replaced with questions that better show the student’s reading ability. The second major change will add higher level mathematics questions. The final change will add a writing test. Students will have about thirty minutes to write about their reactions to a questions or statement.1.According to the passage, the S-A-T test ______A.is widely used as a world college entrance exam.B.charges the students a very high registration fee.C.has a history of almost a hundred years.D.is difficult for African-American teenagers to pass.2.What is the critics’ opinion of the S-A-T test?A.They don’t approve of it at all.B.The test is not perfect for its purpose.C.It looks down on other ethnic groups.D.It’s expensive for those poor families.3.The College Board decided to make major changes in the S-A-T test in order to ______A.help college official better identify successful students.B.help the poor students to save the cost of preparation.C.enable teenagers of ethnic groups to get higher scores.D.check how well the material is taught in high school.4.Which statement is NOT true about the S-A-T test before the major changes?A.It doesn’t test a student’s reasoning and thinking skills.B.Analogy questions only test a student’s knowledge of words.C.There are no higher level mathematics.D.Students don’t write about their reactions to a question or statement.翻译1. 移民们在新的国家定居下来之后,逐渐适应了新生活。

杨浦寒假补习班初中高中补习班新王牌资料直角三角形性质(学生版)

杨浦寒假补习班初中高中补习班新王牌资料直角三角形性质(学生版)

一、知识精要直角三角形全等的判定:斜边与一直角边对应相等的两个直角三角形全等.(HL)直角三角形的性质定理及其推论:定理1:直角三角形的两个锐角互余;定理2:直角三角形斜边上的中线等于斜边的一半;定理2的推论:(1)在直角三角形中,如果一个锐角等于30°,则它所对的直角边等于斜边的一半;(2)在直角三角形中,如果一条直角边等于斜边的一半,那么这条直角边所对的角为30°. 轨迹:把符合某些条件的所有点的集合叫做点的轨迹。

三条基本轨迹:轨迹1 和已知线段两个端点相等的点的轨迹是这条线段的垂直平分线。

轨迹2 到已知角的两边距离相等的点的轨迹是这个角的平分线轨迹3 到定点的距离等于定长的点的轨迹是以定点为圆心,以定长为半径的圆二、热身练习1.如图1所示,AB=CD,DE⊥AC于E,BF⊥AC于F,且DE=BF,∠D=65°,则∠A=__________.2.在直角三角形ABC中,∠ACB=90度,CD是AB边上中线,图中有_______等腰三角形.3.如图2,在△ABC中,∠B=∠C=∠BAC,D、E分别是BC、AC的中点,AB=8,则△DEC的周长为。

图1 图2 4.顶角为30度的等腰三角形,若腰长为2,则腰上的高__________,三角形面积是________5.Rt△ABC中,∠C=90°,∠A=15°,AB的垂直平分线交AC于D,AB于E, 求证AD=2BC.6、已知如图在ABC∆中,AD是CB边上的高,CE是AB边上的中线,,DC BE DG CE=⊥于点G,(1)求证:G是CE的中点;(2)求证:2B BCE∠=∠三、精解名题ABCDEGA基础题例1:例3. 如图,Rt △ABC 中,∠C=90°,∠A=15°,AB 的垂直平分线交AC 于D 、AB 于E. 则AD=______BC.例2:在△ABC 中,∠ACB=90°,D 是AB 边的中点,点F 在AC 边上,DE 与CF 平行且相等。

杨浦秋季培训机构新王牌循环小数与周期性问题

杨浦秋季培训机构新王牌循环小数与周期性问题

循环小数与周期性问题【本讲知识点】1、找出规律,发现周期现象,确定重复出现的元素的个数是几,周期就是几。

2、将题中要求的问题和某一周期的等式相对应,再运用一些简单的计算和分析求出答案。

【例题】1、计算:1÷7,小数点后面第100位上的数字是几?2、计算6÷7商的小数点后面1000个数字和是几?3、在循环小数∙∙4763822.0中,最少从小数点右面第几位开始到第几位为止的数字之和等于2020。

4、在小数1.80524102007上加两个循环点,能得到的最小的循环小数是多少?5、求3729143847⨯积的个位数字是几?6、下面是一个11位数,每3个相邻数字之和都是17,那么“?”处表示的数字是几?7、2007年1月1日正好是星期一,那么2007年6月1日是星期几?【课堂练习】1、计算:4÷7,并将结果用“四舍五入法”精确到小数后第100位,这第100位的数字是几?2、循环小数∙∙99912.0小数点后第100位上的数字是几?这100个数字的和是多少?3、在循环小数∙∙97406376.0中,最少从小数右面第几位开始,到第几位为止的数字之和等于2010?4、在循环小数∙17128156.2中的某一位数字上再添一个表示循环的点后,使得新的循环小数尽可能大或尽可能小。

5、求1113333322⨯积的个位数字是几?6、下面是一个11位数,每三个相邻数字之和都是15,你知道“?”表示的数字是几吗?这个11位数你能写出来吗?7、2009年3月1日正好是小明11岁的生日,是星期天,那么小明12岁生日时是星期几?【课后练习】1、计算9÷13,商的小数点后面第200位上的数字是几?2、循环小数∙∙945678312.0的小数点后第2006位上的数字是几?3、小数0.738231693450添上表示循环节的两个点,使其变成循环小数,已知小数点后第100位上的数字是3,这循环小数是怎样的?4、计算16÷37,商的小数点后2010个数字之和是多少?5、一个最简真分数7m ,化成小数后,如果从小数点后第一位起连续若干位的数字之和等于2004,求m 的值。

杨浦区暑假新高一补习班新王牌新高一数理化高L老师磁场知识点

杨浦区暑假新高一补习班新王牌新高一数理化高L老师磁场知识点

杨浦新王牌磁场一、电流的磁场1.如图所示,两根平行放置的长直导线a和b载有大小相同方向相反的电流,a受到的磁场力大小为F1,当加入一与导线所在平面垂直的匀强磁场后,a受到的磁场力大小变为F2,则此时b受到的磁场力大小变为()(A)F2(B)F1-F2(C)F1+F2(D)2F1-F22.关于磁感线,下列说法中正确的是()(A)磁感线从N极出发,终止于S极,是不连续的曲线(B)磁感线是实际存在的描绘磁场性质的曲线(C)磁感线能反映磁场中各点磁场的方向(D)磁体内部也有磁感线3.如图,在光滑水平桌面上有两根弯成直角的相同金属棒,它们的一端可绕固定转动轴O自由转动,另一端b相互接触,组成一个正方形线框。

正方形每边长度均为L,匀强磁场的方向垂直桌面向下,磁感应强度为B,当线框中通以图示方向的电流时,两金属棒在b点的相互作用力为f,求此时线框中的电流的大小。

4.取两根完全相同的长导线,用其中一根绕成如图(a)所示的螺线管,当在该螺线管中通以电流强度为I的电流时,测得螺线管内中部的磁感应强度大小为B,若将另一根长导线对折后绕成如图(b)所示的螺线管,并通以电流强度也为I的电流,则在该螺线管内中部的磁感应强度大小为()(A)0 (B)0.5B (C)B (D)2B5.有两条长直导线垂直水平纸面放置,交纸面于a、b两点,通有大小相等的恒定电流,方向如图,a、b的连线水平。

c是ab的中点,d点与c点关于b点对称。

已知c点的磁感应强度为B1,d点的磁感应强度为B2,则关于a处导线在d点的磁感应强度的大小及方向,下列说法中正确的是()(A)B1/2 +B2,方向竖直向上(B)B1/2 -B2,方向竖直向下(C)B1+B2,方向竖直向下(D)B1-B2,方向竖直向上6.在真空的直角坐标系中,有两条互相绝缘且垂直的长直导线分别与x、y轴重合,电流方向如图所示. 已知真空中距无限长通电直导线距离为r处的磁感应强度B=kI/r ,k=2×10-7T?m/A,若I1=4.0A,I2=3.0A。

杨浦区暑假补习班新王牌高中数学王WI老师椭圆标准方程附性质

杨浦区暑假补习班新王牌高中数学王WI老师椭圆标准方程附性质

杨浦新王牌xyA BCDO y x (7)设椭圆的方程为12222=+by a x )0(>>b a ,椭圆与y 轴正半轴的一个交点B 与两焦点21,F F 组成的三角形的 周长为324+,且3221π=∠BF F ,则此椭圆的方程为 (8)椭圆141622=+y x 上的点到直线022=-+y x 的最大距离是(9)椭圆14922=+y x 的焦点1F 、2F ,点P 为其上的动点,当∠1F P 2F 为钝角时,点P 横坐标的取值范围是 (10)若点P 是椭圆2219x y +=上的动点,定点A 的坐标为(2,0),则||PA 的取值范围是 (11)过点)0,2(-M 的直线m 与椭圆1222=+y x 交于21,P P ,线段21P P 的中点为P ,设直线m 的斜率为1k (01≠k ), 直线OP 的斜率为2k ,则21k k 的值为(12)如图,在平面直角坐标系xOy 中,椭圆12222=+by a x(0>>b a )被围于由4条直线a x ±=,b y ±=所围成的矩形ABCD 内,任取椭圆上一点P ,若OB n OA m OP ⋅+⋅= (m 、R n ∈),则m 、n 满足的一个等式是______________(11)如图,在直角坐标系xOy 中,设椭圆)0(1:2222>>=+b a by a x C 的左右两个焦点分别为21F F 、.过右焦点2F 且与x 轴垂直的直线l 与椭圆C 相交,其中一个交点为()1,2M . (1) 求椭圆C 的方程;(2) 设椭圆C 的一个顶点为),0(b B -,直线2BF 交椭圆C 于另一点N ,求△BN F 1的面积.(12)椭圆)0(1:2222>>=+b a by a x C 的左、右焦点分别是)0,(1c F -,)0,(2c F ,过1F 斜率为1的直线l 与椭圆C 相交于A ,B 两点,且2AF ,AB ,2BF 成等差数列.(1)求证:c b =;(2)设点)1,0(-P 在线段AB 的垂直平分线上,求椭圆C 的方程.。

杨浦培训班杨浦初升高补习班新王牌资料七年级复习

杨浦培训班杨浦初升高补习班新王牌资料七年级复习

春季班辅导材料—14期末考试复习专题:二:语音一)根据音标写单词:1. I felt _____ to hear the news. /disə’pɔintid/2. The poor man looked _____ at his wife. /sædli/3. The ______ is dropping these days. /’ temprətʃə /4. I would be _____ to walk in the rain. /ɔ:ful/5. It’s _____ of you to do such a thing. /sili/6. She looked happy when she ______ the news. /hə:d/7. The summer _____ are coming soon. /’hɔlədi/8. In winter he _____ in his warm house. /steid/9. _______ he is old, he still keeps learning. /ɔ:l’ðəu/10. It’s a ______ between us. /’si:krit/11. The artist _____ his name in the corner of the painting. /Saind12. Send my best wishes to _______ in the family. /’evriwʌn/13. The little boy is ____ to draw a nice picture. / Eibl/14. This is the beginning of a new __________. /’ sentʃəri/15. _____ there will be not enough food for everyone. /pə’hæps/16. The students are talking about their _______ life. /fju:tʃə/17.People in different countries speak different ________. /’læŋgwidʒiz/18. The ______ can do much work for us. /’ rəubɔt/19. Air pollution in some big cities is ___________. /’teribəl/20. Do you want a more ______ school life? /in’dʒɔiəbl/21.The engineer is designing a new _________[məˈʃi:n]st Spring Festival ,some of my _______[ˈpɒkɪt]money came from Wechat red envelopes.23.As a student,she ________[ˈsɜ:tnli]knows how to help her students,24.Jack is getting taller,now he wears size large ,not ________[ˈmi:diəm] .25.Keeping a _______ [ˈdaɪəri] is a good habit for students.二):Which of the following underlined parts is different in pronunciation from the others:1. A. There is no reason for him to refuse me. B. The little girl in red is so cute.C. Don’t judge a person by his clothes.D. You can use my computer if you want.2. A. It was snowy and windy. B. What was the lowest temperature thenC. Writing things down is important.D. The wind blows the clouds.3. A. I hope you can believe me. B. Luckily, nobody died in the accident.C. Who is the chief of your team?D. I bought a piece of furniture yesterday.4. A. It was cold last night. B. She gave a quiet cough to attract my attention.C. Smoking is a big cause of death.D. I had a meal of bread and cheese last night.5. A. My diet is made up of rice and vegetables. B. The food finally arrived.C. This is really surprised me.D. This jacket fits him quite well.6. A. My father used to be a lawyer. B. All you have to pay for are breakfast and dinner.C. He is a football player.D. Now for the second wave.7. A. A little house is among the trees. B. He is at law college.C. The main problem is unemployment.D. This may not be possible.8. A. I prefer to walk along the street. B. We should eat less unhealthy food.C. I have a terrible headache.D. Jenny didn’t feel good about herself.复习专题:三:Complete the following passage with the words or phrases in the box. Each can only be used once (将下列单词或词组填入空格。

杨浦高中补习机构新王牌高二补习资料

杨浦高中补习机构新王牌高二补习资料

高二英语I Section A(A)On June 17, 1774, the officials from Maryland and Virginia held a talk with the Indians of the Six Nations. The Indians (1) (invite) to send boys to William and Mary College. In a letter the next day they refused the offer as follows:We know that you have a high opinion of the kind of learning taught in your colleges, and that the costs of living of our young men, while with you, would be very expensive to you. We are convinced that you mean (2) (do) us good by your proposal; and we thank you heartily. But you must know that different nations have different ways of (3) (look) at things, and you will therefore not be offended if our ideas of this kind of education happen not to be the same as (4) . We have had some experience of it. Several of our young people were formerly brought up at the college of the northern provinces: they were taught all your sciences; but (5) they came back to us, they were bad manners, ignorant (6)every means of living in the woods --- they were totally good for nothing.We are, however, not the less obliged by your kind offer, (7) we refuse to accept it; and, to show our grateful sense of it, if the gentlemen of Virginia will send us a dozen of their sons, we will take care of their education, (8) (teach) them all we know, and making men of them.(B)What makes one person more intelligent than another? What makes one person a genius, like the brilliant Albert Einstein, and another person a fool? Are people born intelligent or stupid, or is intelligence the result of where and (9) you live? These are very old questions and the answers to them are still not clear.We know, however, that just being born with (10) good mind is not enough. In some ways, the mind is like a leg or an arm muscle, (11) needs exercise. Mental (done with the mind) exercise is particularly important for young children. Many child psychologists(心理学家) think that parents (12) play with their children more often and give them problems to think about. The children are then more likely to grow up bright and intelligent. On the other hand, if (13) (leave) alone a great deal with nothing to do, children are more likely to become dull and unintelligent.Parents should also be careful with what they say to young children. According to some psychologists, (14) parents are always telling a child that he or she is a fool or an idiot, then the child is more likely to keep doing silly and foolish things. So it is probably(15) (good) for parents to say very positive things to their children, such as "That was a very clever thing you (16) (do)." or "You are such a smart child."Section BFilmgoers should be told how many calories there are in the popcorn, ice cream and soft drinks that they buy in cinemas, according to the Food Standard Agency. Smaller popcorn buckets and drink cups should also be made__25__, the nutrition inspector said. Tim Smith, chief executive of the agency, said that cinemas should help to deal with the country's overweight__26__. "There is a misbelief that popcorn is calorie-free, but that is not the case. It is a __27__to us," he said. "Portion sizes are also a big issue, and there seems to be increasingly big packs on sale." He spoke as a number of food chains such as Pret Manger, Wimpey and The Real Greek __28__to put calorie counts on all their menus. A trial scheme(试行方案)with 21 food companies took place last summer,and __29__are that consumers ___30____ their buying habits when they realized the number of calories in a product. A consultation(征询意见) on the trial ends next month but Mr. Smith is already planning the second drive for American-style calorie counts and is__31__to win support from cinemas and other entertainment places, from football grounds to concert halls. Government__32__suggest that two thirds of adults and a third of children are overweight. If trends are not__33__, this could rise to almost nine in ten adults and two thirds of children by 2050, putting them at__34__risk of heart disease, cancer and other diseases.II. Reading ComprehensionSection APsychologists in Britain have said that the last full week of January is the most depressing time of the year, and labeled next Monday …Blue Monday‟.Mondays are __35__ seen as the worst day of the week because people feel bad-tempered and tired at having to go back to work after a weekend with a different __36__.There are various reasons why more people feel depressed at this time of the year. Many people have __37__ credit card bills for the Christmas presents they bought, and pay day is often not until the end of the month.As the party season is over, people feel __38__ because they have to go back to real life and they may be unhappy with their body __39__ after having too much wine, ice-cream, and other food at Christmas-time.Peop le may have already failed in their New Year‟s resolutions, __40__ giving up smoking. The bad weather in January can also __41__ people feeling fed up.Some companies are taking this quite seriously and offering counseling (咨询)for any staff who are feeling depressed. They hope that helping people as soon as there are __42__ of depression will avoid frequent absence from work.__43__, it‟s not all bad! Many people feel optimistic at this time, that things can only get __44__. Psychologists offer suggestions of how to avoid feeling blue. These include spending 15 minutes doing a “gratitude exercise” thinking about and writing down what you are __45__ for, such as health, family, friends and so on.__46__ a new hobby, doing some exercise, going to bed earlier, eating a healthy breakfast, and listening to some uplifting music, are all __47__as ways to feel more cheerful.To avoid feeling blue next January, experts say that the best thing to do is to __48__ better next December. Spend less on presents, eat and drink less over the festive period, and make more __49__ New Year‟s resolutions.35. A. regularly B. generally C. continuously D. obviously36. A. sleep pattern B. hair style C. working time D. food supply37. A. undeveloped B. unpaid C. unguarded D. untouched38. A. complicated B. stressed C. excited D. ashamed39. A. temperature B. language C. health D. image40. A. instead of B. for example C. such as D. including41. A. result from B. lead in C. devote to D. contribute to42. A. suggestions B. signals C. signs D. symbols43. A. Therefore B. Otherwise C. Moreover D. However44. A. worse B. better C. more good D. more harm45. A. responsible B. critical C. grateful D. enthusiastic46. A. Taking up B. Getting over C. Adding to D. Making up47. A. recommended B. substituted C. involved D. explained48. A. plan B. predict C. broadcast D. bargain49. A. ambitious B. incredible C. ridiculous D. realisticSection B(A)Exploit your parking spaceAn unused parking space or garage can make money. If you live near a city center or an airport, you could make anything up to £200 or £300 a week. Put an advertisement for free on Letpark or Atmyhousepark.Rent a roomSpare room? Not only will a lodger(房客)earn you an income, but also, thanks to the government-backed "rent a room" program, you won't have to pay any tax on the first £4500 you make per year. Try advertising your room on Roomspare or Roommateeasy.Make money during special eventsDon't want a full-time lodger? Then rent on a short-term basis. If you live in the capital, renting a room out during the Olympics or other big events could bring in money, Grashpadder can advertise your space.Live on setRenting your home out as a "film set" could earn you hundreds of pounds a day, depending on the film production company and how long your home is needed. A quick search on the Internet will bring up dozens of online companies that allow you to register your home for free—but you will be charged if your home gets picked.Use your roofYou need the right kind of roof, but some energy companies pay the cost of fixing solar equipment(around £14,000), and let you use the energy produced for nothing. In return, they get paid for unused energy fed back into the National Grid. However, you have to sign a 25-year agreement with the supplier, which could prevent you from changing the roof.50. If you earn £5000 from renting a room in one year, the tax you need to pay will be based on ______.A. £800B. £500C. £4500D.500051. If you want to use energy free, you have to_________.A. sign an agreement with the governmentB. pay around£14,000 for the equipmentC. sell the roof to some energy companiesD. keep the roof unchanged for within 25 years52. For whom was the text most probably written?A. Lodgers.B. Advertisers.C. House owners.D. Online companies(B)Endangered species are plants and animals that are in immediate danger of extinction. Extinction is actually a normal process in the course of evolution. Since the formation of the earth, many more species have become extinct than those exist today. These species slowly disappeared because of change of climate and their failure to adapt to such conditions as competition and predation. Since the 1600s, however, the process of extinction has greatly accelerated as a result of both human population growth and technological encroachment on natural ecology systems. Today the majority of the world‟s environments are changing faster than th e ability of most species to adapt to such changes through natural selection.Species become extinct or endangered for number of reasons, but the primary cause is the destruction of natural habitats. Drainage of wetlands, cutting and clearing of forests, growth of cities, and highway and dam construction have seriously reduced available natural habitats. As the various surroundings become fragments, the remaining animal population crowd into smaller areas, causing further destruction of natural surroundings. Species in these small “islands” lose contact with other populations of their extinction.Some private and government efforts have been organized to save declining species. Laws were made in some countries in the early 1900s to protect wild animals from commercial trade and killing. International endeavors are shown in the convention on International Trade in Endangered Species, approved by 51 nations. Its purpose is to restrict exploitation of wild animals and plants by regulating and restricting trade in certain species. How effective such laws will be in various countries, however, depends on enforcement and support by the people and the courts. Because of lack of law enforcement, the willingness of some segments of society to trade in endangered species, the activities of people who catch and kill animals illegally and dealers who supply the trade, the future of many species is in doubt in spite of legal protection.53.According to the passage, which of the following is the most important factor causing the rapid extinction ofmany species since the 17th century?A. Human beings are not aware of the importance of preserving endangered species.B. Some endangered species have already reached the end of their life span in evolution.C. The development of human society has greatly affected natural ecology systems.D. The world‟s climate has changed greatly that most species cannot survive.54.This passage mentions all of the following causes for the extinction of many species EXCEPTA. natural selection of species.B. various natural disasters.C. commercial trade and killingD. destruction of natural surroundings.55.According to the passage, which of the following is most important in saving declining species?A. governments should make some laws to protect endangered species.B. People should pay more attention to the protection of natural surroundings.C. Relevant law must be made and enforced with the support of the people.D. Some organizations should warn people not to trade in endangered animals.Section CWhile I do think that being a giving person is one of the ultimate acts of being a loving person, I came to realize that I must give to and love myself first and foremost.Here's why:62._____________________________________. And when you are not meeting your needs, and you don't take care of yourself (emotionally, physically, mentally, spiritually), you can't be the best version of yourself to the special people in your life. So in essence, you don't love them at your full potential!Here are some things to consider--Are you physically taking care of yourself? Do you nourish yourself with the right foods, get enough sleep, exercise, are at a healthy weight, and on top of your check-ups? If not, I bet your energy is low, you're tired and stressed, and your confidence isn't the highest (because you probably don't feel your best).63.__________________________________________.Are you emotionally and mentally healthy? 64.__________________________________________. But in general, assess where you stand emotionally. If it's in a healthy place and you can manage your emotions in a healthy way — great! But if you self-soothe in destructive ways and have a negative attitude and energy about you, realize that it's not just affecting you, but others too. When you aren't an emotionally and mentally healthy person, that energy pours into everything you do, and everyone you're around will feel the effects, too.How's your spirituality? In this sense, spirituality is about having an ultimate purpose and being in tune with your true self. Do you wake up every day excited for what your life is about, and have gratitude for all the abundance you already have? If not, you may not be listening and living to what your heart truly desires. Living this way long term, may affect the essence of your inner being and, in turn, may not allow you to show up yourvery best for the world.Be kind to yourself. It can be difficult to put your health and well-being first when life is demanding between your career, family, friendships, relationships, and so on. 65. _________________________________________. Take a baby step towards this. Perhaps try getting an hour more of sleep. Move your body in a way that feels good. Take time for yourself to be with your thoughts and without distractions and feel that peace.A. As humans, we're so complex and having ups and downs is normal.B. I used to believe that love meant putting everyone else and their needs first, before my own.C. Now think about how much more you could give to others when you aren't exhausted, you're happy with what you see in the mirror, and you aren't on edge with stress.D. When you put everyone and everything else above you, you are no longer valuing yourself and your needs. AB. If you can think of any ways to improve your well-being and love yourself more, start today!III .Translation66. 毫无疑问,那位演讲者值得在场所有人的赞美。

杨浦区高中补习班 高中辅导班 新王牌小班龚Y老师

杨浦区高中补习班 高中辅导班 新王牌小班龚Y老师

A B C N M D Q P 杨浦新王牌小班3.2 函数关系的建立基本问题及方法熟悉建立函数关系的步骤;注意定义域的实际意义练习一、填空题1.以半径为R 的半圆上任意一点P 为顶点,直径AB 为底边的ΔPAB 的面积S 与高PD=x 之间的函数关系式是2.储油30m 3的油桶,每分钟流出43m 3的油,则桶内剩余油量Q (m 3)以流出时间为自变量的函数的定义域为3.A 、B 两地相距160k m (A 地在B 地的正北方向),甲从A 地以80k m /s 的速度向B 行驶,乙从B 地向正东方向以60k m /s 的速度行驶.若甲、乙同时出发,则它们之间的最小距离为二、选择题4.某企业生产总值的月平均增长率为P ,则年平均增长率为 ( )(A )P (B )P 12 (C )(1+P)12 (D )(1+P)12-15.某商品零售价2002年比2001年上涨25%,欲控制2003年比2001年只上涨10%,则2003年应比2002年降价 ( )(A )15% (B ) 12% (C )10% (D )5%6.一名退休职工每年获得一份医疗保障金,金额与他工作的年数的平方根成正比,如果多工作a 年,他的保障金会比原有的多m 元;如果多工作b )(a b ≠年,他的保障金会比原来的多n 元,那么他每年的保障金(用n m b a ,,,表示)是 ( )(A ))(222b a n m -- (B )abn m 2)(2- (C ))(222bn am bn am -- (D ))(222an bm bm an -- 三、解答题7.一根均匀的轻质弹簧,已知在 600N 的拉力范围内,其长度与所受拉力成一次函数关系,现测得当它在 100N 的拉力作用下,长度为 0.55 m ,在 300N 拉力作用下长度为 0.65m ,那么弹簧在不受拉力作用时,其自然长度是多少?8.在底边BC=60,高AD=40的△ABC 中作内接矩形MNPQ.设矩形的面积为S ,MN=x ,写出S 与x 之间的函数关系式,并求其定义域和值域.四、拓展题9.某房地产公司要在荒地ABCDE (如图)上划出一块长方形的地面修建一座公寓楼.问如何设计才能使公寓楼地面的面积最大,并求出 最大的面积.603.3 函数的运算基本问题及方法和函数及积函数是原函数定义域的交集练习一、填空题1. 已知22)(,123)(2-=+-=x x g x x x f ,则________;)2()2(=+g f________;)()(=+x g x f 2. 已知41)(,5)(+=+=x x g x x f ,则)()(x g x f +的定义域___________ 3. 已知)(x f 的定义域是[a,b],且a+b>0,则)()(x f x f -+的定义域___________ 二、选择题4. 函数1)(,1)(2+=-=x x x g x x x f ,则)()(x g x f ∙的定义域是 ( )(A )[)+∞,1 (B )()()+∞⋃∞-,00, (C )(][)+∞⋃-∞-,11, (D )[)()+∞⋃-,00,15. 下列表达式中不表示函数的是 ( )(A )3)(0+=x x f (B )x x x f -+-=23)( (C ))2)(3()(x x x f --= (D )xx x f --=23)( 6. 下列说法中不正确的是 ( )(A )任意两个函数的和未必是函数(B )两个函数的和函数的定义域与他们的差函数的定义域相同(C )两个函数的和函数的定义域是他们的各自的定义域的子集(D )两个函数的和函数的值域是他们各自的值域的并集三、解答题7. 若x x f x f 3)1(2)(=+,求函数()f x 的解析式8. 已知a ,b 是常数,,34)(2++=x x x f 若,2410)(2++=+x x b ax f 求5a-b四、拓展题9.已知,12)(x x x f +=求)2001()22()21()001()2()1(f f f f f f +⋅⋅⋅++++⋅⋅⋅++ )100001()1001()31(f f f +⋅⋅⋅++⋅⋅⋅++的值基本问题及方法理解判定函数的奇偶性,利用定义证明函数的奇偶性练习一、填空题1. 已知1()21x f x a =-+是奇函数,则a =________ 2. 函数2()f x x bx c =++为偶函数,则实数b 、c 满足条件___________3. 若3()1f x ax bx =++(a 、b 为常数),且(1)2f =,则(1)f -=________二、选择题4. 函数32||y x x -=+是( )(A )奇函数(B )偶函数(C )既是奇函数又是偶函数(D )非奇非偶函数5. ()f x 是定义在[6,6]-上的偶函数,且(3)(1)f f >,下列各式中一定成立的是( )(A )(3)(2)f f >(B )(2)(0)f f >(C )(0)(6)f f <(D )(1)(3)f f -<6. 下列说法中不正确的是( )(A )图像关于原点对称的函数一定是奇函数(B )奇函数的图像一定经过原点(C )偶函数的图像若不经过原点,则它与x 轴的交点个数一定是偶数(D )图像关于y 轴对称的函数一定是偶函数三、解答题7. 若()f x 为定义在R 上的奇函数,当0x >时,2()2f x x x =+,求函数()f x 的解析式8. 判断并用定义证明函数(21)()21x x x f x -=+的奇偶性四、拓展题9.定义在R 上的非常值函数()f x ,若对任意实数a 、b 均有()()2()()f a b f a b f a f b -++=,求证:()f x 为偶函数基本问题及方法理解判定函数的单调性,利用定义证明函数的单调性练习一、填空题1. 函数2264y x x =-++的递减区间是________2. 若函数227y x mx =+-在(,1]-∞上递减,则实数m 的取值范围是___________3. 函数()f x =________;递减区间是________4. 若函数()||2f x a x b =-+在[0,)+∞上为增函数,则实数a 、b 的取值范围是_________二、选择题5. 在区间(0,)+∞上不是增函数的是( )(A )21y x =+ (B )231y x =+ (C )2y x= (D )221y x x =++ 6. 若奇函数()f x 在R 上单调递增,则“0a b +≥”是“()()0f a f b +≥”的( )条件(A )充分不必要 (B )必要不充分 (C )充分必要 (D )既不充分也不必要三、解答题7. 证明:函数()f x =[0,1]上是增函数8. 函数2()49f x kx x =++在区间[2,8]上递增,求实数k 的取值范围9. 若奇函数()f x 在其定义域(1,1)-内单调递减,求满足2(1)(1)0f m f m -+-<的m 的取值范围四、拓展题10.定义在R 上的函数()f x ,当0x >时()1f x >,且对任意实数a 、b 均有()()()f a b f a f b +=⋅,证明:()f x 是R 上的增函数。

[VIP专享]杨浦区暑假最好的新高一补习班 新王牌新高一数理化补习

[VIP专享]杨浦区暑假最好的新高一补习班 新王牌新高一数理化补习

D.氧化镁
9、医院里用 HgCl2 的稀溶液作手术刀的消毒剂。HgCl2 熔融时不导电,熔点低。HgS 难溶
于水和稀的强酸却易溶于饱和的 NaCl 溶液中。关于 HgCl2 的描述合理的是(

A.是难溶的共价化合物
B.是离子化合物
C.是一种强电解质
D.是一种弱电解质
10、相同温度下,两种氨水 A、B,浓度分别是 0.2mol/L 和 0.1mol/L,则 A 和 B 的 OH-浓
C.0.1 mol/L 氨水可以使酚酞试液变红
D.0.1mol/L 氯化铵差的是(

A、熔融氢氧化钠
B、石墨棒
C、盐酸溶液
D、固体氯化钾
14、下列事实一定能说明 HF 是弱酸的是(

①常温下 NaF 溶液的 pH 大于 7
②用 HF 溶液做导电性实验,灯泡很暗
0 V(H2O)
A
V(H2O) 0 B
V(H2O) 0 C
V(H2O)
0
D
5、下列物质的水溶液能导电,但属于非电解质的是(

A、CH3COOH
B、Cl2
C、NH4HCO3
D、SO2
6、下列叙述中正确的是(

A.物质的溶解过程,实质上就是其电离过程
B.二氧化硫的水溶液能导电,所以二氧化硫是电解质
C.1L 0.1mol/L 的 H2SO4 溶液中含有 0.2mol 的 H+

A.0.5mol/L MgSO4 溶液
C.0.5mol/L CH3COOH溶液
3、下列说法正确的是(

B.0.5mol/L 盐酸 D.0.5mol/L NH4Cl 溶液
A.强电解质溶液一定比弱电解质溶液的导电性强

杨浦区最好高中补习班新王牌高考补习高中数学等比数列

杨浦区最好高中补习班新王牌高考补习高中数学等比数列

杨浦新王牌等比数列【知识精要】1、等比数列的概念:如果一个数列从第二项起,每一项与它的前一项的比都等于同一个常数,这样的数列称为等比数列,这个常数叫做等比数列的公比。

2、通项公式:)0(11≠==--q qa qa a mn m n n = {12,,11=≥--n S n S S n n3、性质:1)、等比中项:)0(,,2>=⇒ab ab G b G a 成等比数列;问:①、“实数a,b,c 满足ac b =2”是“a,b,c 成等比数列”的 必要不充分 条件;②、“实数a,b,c 满足ac b =”是“b 为a 、c 的等比中项”的 既不充分也不必要 条件。

2)、q p n m a a a a q p n m ⋅≡⋅⇒+=+4、判定方法:1)、定义法:{})2,0(P .G 1≥≠=⇔-n q q a a a n nn 是; 2)、等价定义:{})0,2(P .G 11112≠⋅≥⋅=⇔+-+-n n n n n n a a n a a a a 是5、前n 项和公式:⎪⎩⎪⎨⎧==≠--11,1)1(,11q na q qq a n n S .【热身练习】1、在等比数列{}n a 中,===452,162,6a a a 则 54 。

2、已知数列{}n a 满足===++n n n a a a a 则,2,0211 1)2(2--⋅n 1 。

3、方程01322=+-x x 两根的等比中项为 22± 。

4、三个实数c b a ,,成等差数列,又成等比数列,则=c b a :: 1:1:1 。

115、若c b a 、、成等比数列,则函数轴的图像与x c bx ax y ++=2交点的个数 为 0 个。

【精解名题】例1、若数列{}n a 的通项公式为)(23*N n a n n ∈⋅=-,证明:{}n a 为等比数列,并指出该数列的首项与公比。

答案与提示:利用等比数列的定义进行证明。

杨浦新王牌 秋季周末同步提高 高中数学 王WI老师

杨浦新王牌 秋季周末同步提高 高中数学 王WI老师


1 3 A、 a , b 2 2 1 3 C、 a , b 2 2
B、 a
3 1 ,b 2 2 3 1 D、 a , b 2 2
( )
(5)设全集为 R, A {x | x 2 5x 6 0} , B {x | x 5 a} ,a 为正常数,若 11∈ B,则 (A) A

ab ab 补充: a,b R , 1 1 2 a b 2
a2 b2 当且仅当a b时等号成立 2
二.【填空题】 (1)下列四个命题:
⑴若 0 a b ,则
1 1 ; a b
⑵若
1 1 ,则 1 a ; a
⑶若 1 a 2, 0 b 3 ,则 2 a b 2 ; 其中为真命题的是___________
* n
教学目的
b c (可加性) ; ac bc ; c
; ac bc (可乘性)
cb
d (叠加性) ;
ac bd (叠乘性) ;
n
, n N a b (可乘方性) ; , n N n a n b (可开方性) ;
*

1 1 (可倒性) ; a b
1


三.【选择题】 (1) 若 a b 0 ,则下面不等式正确的是(
)
2ab a b a b 2ab B. ab ab ab 2 2 ab (2)若 a b 0 ,则下列结论中正确的是( ).
A. A.
1 1 1 1 和 均不能成立 a b a b
1 1 1 1 和 均不能成立 a b ab a
C.
2ab ab ab ab 2

杨浦高中补习班杨浦秋季补习班新王牌暑期新高一第二期新世纪版Unit7

杨浦高中补习班杨浦秋季补习班新王牌暑期新高一第二期新世纪版Unit7

Unit 7 MetropolisesVOCABULARY(Ⅰ)ReadingNew Wordsmetropolis n. 大城市,多数会prediction n. 预言partly adv. 在某种程度上,部份地cultural adj. 文化(上)的headquarters n. 总部,总司令*skyscraper n. 摩天大楼*slum n. (经常使用复数)贫民区pace n. 速度,步伐fascinate v. 使着迷,使神魂倒置carriage n. 旧式四轮载客马车sight n. 景物,景象,奇迹*double-decker n. 双层公共汽车concern n. 担忧;关切v. 使担忧,使关切Expressionsart galleries 美术馆,艺术画廊pace of life 生活节拍change for the better 变好VOCABULARY(Ⅱ)(Additional Reading)New Words *capsule n. 小盒子,密封小容器item n. 一样东西,一件,一项seal n. 把……密封,封锁steel n. (碳)钢,钢铁appoint v. 约定,指定;录用*descendant n. 后代,后裔dozen n. 一打address v. 在(信封或包裹上)写上姓名和地址resident n. 居民,住客scan v. 扫描website n. 网站treasure n. 至宝,珍品Expressionsdozens of 许多feel close to somebody 感觉和……很靠近(listening and speaking)New Words*air-conditioned adj. 装有空调的comfortable adj. 舒适的,舒坦的,中意的terrific adj. (口语)极好的,棒极了*streetcar n. (AmE)(美)有轨电车crossroads n. 十字路口*elevated adj. 架高的;提高的*zebra n. 斑马*crossing n. 人行横道*flyover n. (BrE)(英)立交桥*sidewalk n. (AmE)(美)人行道*underpass n. 地下过街道scenery n. 风光,自然景色Expressionsrush hour (上下班的)顶峰时刻,交通拥堵时刻a variety of 各类各样的cable car 缆车,吊车elevated railway 高架铁路A brief look at two metropolises (Reading)瞥一眼多数市: take/have a brief look at the metropolisNEW YORKIn the 19th century, a businessman predicated that New York was going to become the centre of the world. His prediction has partly come true. Today, New York is often regarded as one of the financial and cultural capitals of the Western World. The United Nations has its headquarters in the city as well.New York, where the world-famous twin towers of the World Trade Center were once located, is known as a city of skyscrapers. There are parks, great museums, art galleries, grand theatres and cinemas for visitors as well. However, like many other cities in the world, New York also has its own problems---noise, air pollution, crimes, traffic jams, and slums. Still, the fast, exciting pace of life in New York City is fascinating and this may be a reason why the city continues to fascinate more and more people.Topic 1: Description of New York1.实现come true2.被看做是be regarded as3.西方经济和文化的首都the financial and cultural capital4.联合国the United Nations5.位于be located in6.作为摩天大楼之城而闻名be known as a city of skyscrapers7.美术陈列馆art gallery8.大剧院grand theatre9.交通堵塞traffic jam 10.快速而令人兴奋的生活节拍the fast and exciting pace of life11.这座城市继续使愈来愈多的人着迷的缘故the reason why the city continue to fascinate more and more peopleLONDONLondon was once known as a city of fog. At that time, many Londoners did not expect that their city would change for the better. However, heavy fog is now rarely seen in London.As a city with a long history, London has also gone through many changes. The days are gone when horse-drawn carriages were a common sight in the street. Now London is famous for its excellent underground service and the red double-deckers have become a symbol of the city. The second half of the 20th century saw great changes in the city. Skyscrapers have sprung up; business centres for the 21st century are also growing fast.However, London has kept its heart. People can still enjoy themselves with a cup of tea in Convent Garden(科文特加登广场). Some of the narrow roads that lead to churches are still there, taking people back to London’s old days. Although there are such concerns as heavy traffic, crowded shops and dirty streets in some areas, to many people, London remains the most interesting and wonderful city in the world.Topic 2: Description of London1.变好/变坏change for the better/worse2.大雾heavy smoke3.一个历史悠长的城市 a city with a longhistory4.经历了许多转变go through manychanges 5.常见的景象a common sight6.因为完美地地铁效劳而闻名be famous forexcellent/perfect underground services7.红色的双层巴士the red double-decker8.20世纪下半叶the second half of the 20th century9.见证极大的转变see great changes in thecity10.拔地而起spring up11.维持其传统keep its heart12.通往教堂的狭小小路the narrow road that leads to the church 13.把人们带回过去的岁月take people back to the old days 14.如交通拥堵如此的忧虑such concerns as heavy traffic15.拥堵的商店crowed shops16.仍然是最迷人的城市remain the most fascinating cityTopic1.纽约被以为是西方世界的经济和文化中心之一。

杨浦初中培训杨浦高中培训新王牌资料中考2017九年级数学秋季讲稿7

杨浦初中培训杨浦高中培训新王牌资料中考2017九年级数学秋季讲稿7

杨浦初中培训杨浦高中培训新王牌资料中考2017九年级数学秋季讲稿7中考2016九年级数学秋季讲稿第七课时锐角三角比(2)【基础知识】1、如图,Rt ABC ?中,90C ∠=?,D 是直角边AC 上的点,且2AD DB a ==,15A ∠=? ,则BC 边的长为.2、如图,在矩形ABCD 中,E 、F 、G 、H 分别为AB 、BC 、CD 、DA 的中点,若4tan 3AEH ∠=,四边形EFGH 的周长为40,则矩形ABCD 的面积为 ______. 3、已知3cot tan =+αα,α为锐角,则αα22cot tan +=。

4、(福州)如图,已知△ABC ,AB=AC=1,∠A=36°,∠ABC 的平分线BD 交AC 于点D ,则AD 的长是,cosA 的值是 .(结果保留根号)5、如图,菱形ABCD 中,AE ⊥BC 于E 点,EC =1,sinB =135.四边形ABCD 的周长为。

6、(连云港)小明在学习“锐角三角函数”中发现,将如图所示的矩形纸片ABCD 沿过点B 的直线折叠,使点A 落在BC 上的点E 处,还原后,再沿过点E 的直线折叠,使点A 落在BC 上的点F 处,这样就可以求出67.5°的角的正切值是。

7、如图,两条宽度都是1的纸条交叉叠在一起,且它们的夹角为α,则它们重叠部分(图中阴影部分)的面积是() A 、αsin 1 B 、αcos 1C 、αsinD 、19题8、在Rt △ABC 中,∠C =900,∠A 、∠B 的对边分别是a 、b ,且满足022=--b ab a ,则tanA 等于() A 、1 B 、251+ C 、251- D 、251± 9、(泰州)如图,在边长相同的小正方形组成的网格中,点A 、B 、C 、D 都在这些小正方形的顶点上,AB 、CD 相交于点P ,则tan ∠APD 的值是.【专题研究】:锐角三角比与相似1、如图,在△ABC 中,∠C=90°,D 是BC 边上一点,DE ⊥AB 于E ,∠ADC=45°,若DE ∶AE=1∶5,BE=3,求△ABD 的面积。

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专题八 复数
1.(15北京理科)1.复数()i 2i -=
A .12i +
B .12i -
C .12i -+
D .12i -- 【答案】A 考点:复数运算
2.(15北京文科)复数()1i i +的实部为 【答案】-1 考点:复数的乘法运算、实部.
3.(15年广东理科)若复数()32z i i =- ( i 是虚数单位 ),则z =
A .32i -
B .32i +
C .23i +
D .23i - 【答案】D .
4.(15年广东文科)已知i 是虚数单位,则复数()21i +=( )
A .2-
B .2
C .2i -
D .2i 【答案】D 考点:复数的乘法运算.
5.(15年安徽文科) 设i 是虚数单位,则复数()()112i i -+=( )
(A )3+3i (B )-1+3i (3)3+i (D )-1+i 【答案】C 考点:复数的运算.
6.(15年福建理科) 若集合{}
234,,,A i i i i = (i 是虚数单位),{}1,1B =- ,则A B 等于 ( )
A .{}1-
B .{}1
C .{}1,1-
D .φ 【答案】C 考点:1、复数的概念;2、集合的运算.
7.(15年福建文科) 若(1)(23)i i a bi ++-=+(,,a b R i ∈是虚数单位),则,a b 的值分别等于( )
A .3,2-
B .3,2
C .3,3-
D .1,4- 【答案】A 考点:复数的概念.
8.(15年新课标1理科) 设复数z 满足1+z 1z
-=i ,则|z|=
(A )1 (B (C (D )2 【答案】A
10.(15年新课标2理科)若a 为实数且(2+ai )(a-2i )=-4i,则a=( )
(A )-1 (B )0 (C )1 (D )2 【答案】B
11.(15年新课标2文科)若为a 实数,且2i 3i 1i
a +=++,则a =( ) A .4- B .3- C .3 D .4 【答案】D 考点:复数运算.
12.(15年陕西理科)设复数(1)z x yi =-+(,)x y R ∈,若||1z ≤,则y x ≥的概率为( )
A .3142π+
B .1142π-
C .112π-
D .112π
+【答案】B 考点:1、复数的模;2、几何概型.
14.(15年天津理科)i 是虚数单位,若复数()()12i a i -+ 是纯虚数,则实数a 的值为 .
【答案】2- 考点:1.复数相关定义;2.复数运算.
15.(15年天津文科)i 是虚数单位,计算
12i 2i
-+ 的结果为 .【答案】-i 考点:复数运算. 16.(15年湖南理科) 已知()211i i z -=+(i 为虚数单位)
,则复数z =( ) A.1i + B.1i - C.1i -+ D.1i -- 【答案】D. 考点:复数的计算.
17.(15年山东理科)若复数z 满足1z i i
=-,其中i 是虚数单位,则z = (A)1i - (B) 1i + (C) 1i -- (D) 1i -+ 答案选(A)
18.(15年江苏)设复数z 满足234z i =+(i 是虚数单位),则z 的模为_______.【。

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