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1、部分较难选择、填空题三(含答案与简析)(东城二)8用 min,a b c 表示a、b、c三个数中的最小值,若2min,2,10(0)yxxxx,则 y 的最大值为A4 B5 C6 D7(答案:C 简析:先理解题意中“min,a b c表示a、b、c三个数中的最小值”,再看到2min,2,10(0)yxxxx中,y=x2、y=x+2、y=10-x是三个函数,画图后(画图要有一定的准确性,应求出交点坐标),按题目条件,可看到当 0 x2 时,y=x2;当 2x4 时,y=x+2;当 x4 时,y=10-x。留下选中的图像,可以清晰看到这三段函数图像的最高点为(4,6)(海淀二)8如右图,在平面直角
2、坐标系xOy中,点 A的坐标为(3,1),点 B 是x轴上的一动点,以 AB 为边作等边三角形 ABC.当),(yxC在第一象限内时,下列图象中,可以表示 y 与x的函数关系的是A.B.C.D.(答案:A 简析:分析题意,由“点A的坐标为(3,1)”可知AOY=60;Oyx1-1-11CAB由“点B是x轴上的一动点,以AB为边作等边三角形ABC.当),(yxC在第一象限内时”可知点 B 的起始位置是点O,此时点 C 的坐标为(0,2),即 x=0 时 y=2;画图可知,随着点B 由 O 向右移动时,点C随之增高,即 y 随 x 的增大而增大。依上条件,运用排除法,选出答案)(朝阳二)8已知二次
3、函数 y1=x2-x-2 和一次函数 y2=x+1 的两个交点分别为A(-1,0),B(3,4),当 y1y2时,自变量 x 的取值范围是A x-1 或 x3 B-1x3 Cx-1 Dx3(答案:A 简析:题目并不难,但是体现是否有良好的习惯,即“不论题目是否要求画图,见到函数式,随手画图”。)(石景山二)8某仓储系统有3 条输入传送带,3 条输出传送带某日,控制室的电脑显示,每条输入传送带每小时进库的货物流量如图(1),每条输出传送带每小时出库的货物流量如图(2)若该日,仓库在0 时至 5 时货物存量变化情况如图(3)所示,则下列正确说法共有()该日 0 时仓库中有货物 2 吨;该日 5 时
4、仓库中有货物 5 吨;在 0 时至 2 时有 2 条输入传送带和 1 条输出传送带在工作;在 2 时至 4 时有 2 条输入传送带和 2 条输出传送带在工作;在 4 时至 5 时有 2 条输入传送带和 3 条输出传送带在工作;A1 个 B2 个 C3 个 D4 个第 8 题图(1)第 8 题图(2)第 8 题图(3)文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10
5、HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 Z
6、L6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编
7、码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X1
8、0 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6
9、 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文
10、档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9
11、X10 HF4J6G9K8S6 ZL6U4N7F5K3(答案:C 简析:读图是体现函数学习习惯的又一能力表现,读图时,要明白横、纵轴的含义,要读出函数图像所包含的信息,要能够把函数图像讲成故事)(朝阳二)12在菱形 ABCD 中,对角线 AC,BD相交于点 O,且 AC=12,BD=16,E为 AD的中点,点 P在 BD上移动,若POE为等腰三角形,则所有符合条件的点P 共有_个(答案:4 简析:P、O、E 三点中,定点有 O、E。若以 OE 为底边,可画一个等腰三角形;若以 OE 为腰、O 为顶角顶点,可画两个等腰三角形;若以 OE 为腰、E为顶角顶点,可画一个等腰三角形。最好用圆规动手画图
12、,在画图时注意训练分类意识。题目中的条件“AC=12,BD=16”是限制能否画图而设,所以画等腰三角形时要注意边长的条件。)(东城二)12.如图,正方形 OA1B1C1的边长为 2,以 O为圆心、OA1为半径作弧A1C1交 OB1于点 B2,设弧 A1C1与边 A1B1、B1C1围成的阴影部分面积为1S;然后以 OB2为对角线作正方形OA2B2C2,又以 O为圆心、OA2为半径作弧 A2C2交 OB2于点 B3,设弧 A2C2与边 A2B2、B2C2围成的阴影部分面积为2S;,按此规律继续作下去,设弧nnA C与边nnA B、nnB C围成的阴影部分面积为nS则1S,nS.(答案:4,3122
13、nn10 题图文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:C
14、F4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 H
15、F4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL
16、6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码
17、:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10
18、 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6
19、ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3简析:分别计算每个正方形的边长、面积,每个四分之一圆的半径、面积,就可以依次得出S1、S2、S3,可以明显看出每一个阴影面积是前一个阴影面积的一半,也就是S1(4)的 2n-1 分之一。此类题开始分析时最好不要用原图,而是按题意只画出一个阴影认真分析
20、,分析透了,以后就清楚了。)(海淀二)12.图 1 是一个八角星形纸板,图中有八个直角,八个相等的钝角,每条边都相等.如图 2 将纸板沿虚线进行切割,无缝隙无重叠的拼成图3 所示的大正方形,其面积为 8+42,则图 3 中线段 AB 的长为 .BA图 1 图 2 图 3(答案:21简析:根据题中信息可得图2、图 3 面积相等;图2 可分割为一个正方形和四个小三角形;设原八角形边长为a,则图 2 正方形边长为 2a+2a、面积为(6+22)a2,四个小三角形面积和为2a2,易得 a=1。)(石景山二)12.规定:用m表示大于m的最小整数,例如 25=3,5=6,1.3=1等;用m表示不大于m的最
21、大整数,例如27=3,4=4,1.5=2,如果整数x满足关系式:1232xx,则x_.(答案:2 简析:注意题中的条件“整数x”,按此条件可得m=m+1、m=m。文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9
22、X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8
23、S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K
24、3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3
25、T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9
26、K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F
27、5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3代入关系式即可。)文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文
28、档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9
29、X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8
30、S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K
31、3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3
32、T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9
33、K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3文档编码:CF4M9F3T9X10 HF4J6G9K8S6 ZL6U4N7F5K3