人教版九年级数学下期末复习测试题

Do the following three main points 1 find out the weak Review process is to sum up the knowledge on the one hand make the knowledge more coherent system and regularity but also let the students themselves looks up the deficiencies So we teachers to understand the students knowledge of the situation prior to the review students not only found widespread deficiencies but also some shortcomings for these well designed programs reasonable arrangement of time this review is more targeted and more effective For example you can design a form for investigation understanding students weaknesses in each knowledge put it as a review of key combined with the problem of textbooks to review both to avoid casting a net tihaizhanshu and improve the efficiency of review 2 good collation Through six years of study students in the basics reading method exercises and so already have a certain degree of accumulation the review stage teachers should know how to guide the students to label the accumulation process form a system of knowledge networks Exercises for students to be representative fine complete to live and earnestly do a problem learning a method class of pass was to get time efficient review results 3 pay attention to use The accumulation of knowledge is ultimately to use therefore review the situation and life situation to be created in a variety of languages guide students on the basis of the previous accumulation of knowledge to use to the maximum and really apply what they have learned Second review the content and strategy of the first part the basics a 1 review the main points of Hanyu Pinyin is able to recite and write down the alphabet of Hanyu Pinyin accurate spelling pronunciation after reading cacuminal nasal sound light and retroflex sounds the correct write consonants vowels and syllables 2 main types according to the order of the alphabet of Hanyu Pinyin alphabetical order fill in the appropriate uppercase and lowercase letters see phonetic writing words pinyin to write sentences with dot to select the correct pronunciation of the word to bring some initial consonants or vowels word selection Second the main types of words 1 Ruby written words 2 to bring Word to select the correct pronunciation 3 use a sequencer and radical character lookup method 人教版九年级数学下期末复习测试题人教版九年级数学下期末复习测试题 一 选择题 每小题 3 分 共 30 分 1 在平面直角坐标系中 下列各点在第二象限的是 A 2 1 B 2 1 C 2 1 D 2 1 2 点 A 5 y1 和 B 2 y2 都在直线 y x 上 则 y1与 y2的关系是 A y1 y2 B y1 y2 C y1 y2 D y1 y2 3 如图 1 小华同学设计了一个圆直径的测量器 标有刻度的尺子 OA OB 在 0 点钉在一 起 并使它们保持垂直 在测直径时 把 0 点靠在圆周上 读得刻度 OE 8 个单位 OF 6 个单位 则圆的直径为 A 12 个单位B 10 个单位C 4 个单位D 15 个单位 图 1 4 下列函数关系中 是二次函数的是 A 在弹性限度内 弹簧的长度 y 与所挂物体质量 x 之间的关系 B 当距离一定时 火车行驶的时间 t 与速度 v 之间的关系 C 等边三角形的周长 C 与边长 a 之间的关系 D 圆心角为 120 的扇形面积 S 与半径 R 之间的关系 5 国家实行一系列 三农 优惠政策后 农民收入大幅度增加 某乡所辖村庄去年年人均收 入 单位 元 情况如下表 该乡去年年人均收入的中位数是 A 3700 元 B 3800 元 C 3850 元 D 3900 元 6 在 Rt ABC 中 C 90 cosA 则 tanA 5 1 A 62 B C D 24 2 6 5 62 7 若是方程的两个实数根 则的值为 2 220050 xx 2 3 A 2005 B 2003 C 2005 D 4010 8 将直径为 16cm 的圆形铁皮 做成四个相同圆锥容器的侧面 不浪费材料 不计接缝处的 材料损耗 那么每个圆锥容器的高为 A 4cm B cm C cm D cm43132152 年人均收入35003700380039004500 村庄个数1331 Do the following three main points 1 find out the weak Review process is to sum up the knowledge on the one hand make the knowledge more coherent system and regularity but also let the students themselves looks up the deficiencies So we teachers to understand the students knowledge of the situation prior to the review students not only found widespread deficiencies but also some shortcomings for these well designed programs reasonable arrangement of time this review is more targeted and more effective For example you can design a form for investigation understanding students weaknesses in each knowledge put it as a review of key combined with the problem of textbooks to review both to avoid casting a net tihaizhanshu and improve the efficiency of review 2 good collation Through six years of study students in the basics reading method exercises and so already have a certain degree of accumulation the review stage teachers should know how to guide the students to label the accumulation process form a system of knowledge networks Exercises for students to be representative fine complete to live and earnestly do a problem learning a method class of pass was to get time efficient review results 3 pay attention to use The accumulation of knowledge is ultimately to use therefore review the situation and life situation to be created in a variety of languages guide students on the basis of the previous accumulation of knowledge to use to the maximum and really apply what they have learned Second review the content and strategy of the first part the basics a 1 review the main points of Hanyu Pinyin is able to recite and write down the alphabet of Hanyu Pinyin accurate spelling pronunciation after reading cacuminal nasal sound light and retroflex sounds the correct write consonants vowels and syllables 2 main types according to the order of the alphabet of Hanyu Pinyin alphabetical order fill in the appropriate uppercase and lowercase letters see phonetic writing words pinyin to write sentences with dot to select the correct pronunciation of the word to bring some initial consonants or vowels word selection Second the main types of words 1 Ruby written words 2 to bring Word to select the correct pronunciation 3 use a sequencer and radical character lookup method 9 父亲节 学校 文苑 专栏登出了某同学回忆父亲的小诗 同辞家门赴车站 别时叮咛语 千万 学子满载信心去 老父怀抱希望还 如果用纵轴表示父亲和学子在行进中离家的y 距离 横轴 t 表示离的时间 那么下面与上述诗意大致相吻的图象是 10 相交两圆的公共弦长为 16cm 若两圆的半径长分别为 10cm 和 17cm 则这两圆的圆心 距为 A 7cmB 16cmC 21cmD 27cm 二 填空题 每小题 3 分 共 30 分 11 甲 乙 丙三台机床生产直径为 60mm 的螺丝 为了检验产品质量 从三台机床生产 的螺丝中各抽查了 20 个测量其直径 进行数据处理后 发现这三组数据的平均数都是 60mm 它们的方差依次为 S2甲 0 162 S2乙 0 058 S2丙 0 149 根据以上提供的信息 你认为生产螺丝质量最好的是 机床 12 在某数学小组的活动中 组长为大家出了一道函数题 这是一个反比例函数 并且 y 随 x 的增大而减小 请你写山一个符合条件的函数表达式 13 如图 2 甲 乙两楼相距 20m 甲楼高 20 m 自甲楼顶看乙楼楼顶 仰角为 60 则乙楼的高为 结果可用根式表示 图 2 14 请写出一个开口向上 对称轴为直线 x 2 且与 y 轴的交点坐标为 0 3 的抛物线的解 析式 15 亮亮想制作一个圆锥模型 这个模型的侧面是用一个半径为 9cm 圆心角为 240 的扇形 铁皮制作的 再用一块圆形铁皮做底 请你帮他计算这块铁皮的半径为 cm 16 为了判断甲 乙两个班级学生参加英语口语测试成绩哪一个班比较整齐 通常需要比较 两个班级成绩的 17 四个半径均为的圆如图 3 放置 相邻两圆交点之间的距离也等于 不相邻两圆圆周rr 上两点间的最短距离等于 2 则等于 图中阴影部分面积等于 r A C 60 20m 20m Do the following three main points 1 find out the weak Review process is to sum up the knowledge on the one hand make the knowledge more coherent system and regularity but also let the students themselves looks up the deficiencies So we teachers to understand the students knowledge of the situation prior to the review students not only found widespread deficiencies but also some shortcomings for these well designed programs reasonable arrangement of time this review is more targeted and more effective For example you can design a form for investigation understanding students weaknesses in each knowledge put it as a review of key combined with the problem of textbooks to review both to avoid casting a net tihaizhanshu and improve the efficiency of review 2 good collation Through six years of study students in the basics reading method exercises and so already have a certain degree of accumulation the review stage teachers should know how to guide the students to label the accumulation process form a system of knowledge networks Exercises for students to be representative fine complete to live and earnestly do a problem learning a method class of pass was to get time efficient review results 3 pay attention to use The accumulation of knowledge is ultimately to use therefore review the situation and life situation to be created in a variety of languages guide students on the basis of the previous accumulation of knowledge to use to the maximum and really apply what they have learned Second review the content and strategy of the first part the basics a 1 review the main points of Hanyu Pinyin is able to recite and write down the alphabet of Hanyu Pinyin accurate spelling pronunciation after reading cacuminal nasal sound light and retroflex sounds the correct write consonants vowels and syllables 2 main types according to the order of the alphabet of Hanyu Pinyin alphabetical order fill in the appropriate uppercase and lowercase letters see phonetic writing words pinyin to write sentences with dot to select the correct pronunciation of the word to bring some initial consonants or vowels word selection Second the main types of words 1 Ruby written words 2 to bring Word to select the correct pronunciation 3 use a sequencer and radical character lookup method 精确到 0 01 图 3 图 4 18 如图 4 已知圆锥的母线长 OA 8 底面圆的半径 r 2 若一只小虫从 A 点出发 绕圆 锥的侧面爬行一周后又回到 A 点 则小虫爬行的最短路线的长是 结果 保留根式 19 收音机刻度盘的波长 和频率分别是用米 m 和千赫兹 kHz 为单位标刻的 波长lf 和频率满足关系式 这说明波长 越大 频率就越 lf l f 300000 lf 20 编制一个底面周长为 a 高为 b 的圆柱形花柱架 需用沿圆柱表面绕织一周的竹条若干 根 如图 5 中的 则每一根这样的竹条的长度最少是 111222 A C B A C B 图 5 三 解答题 21 26 每小题 7 分 27 28 每小题 9 分 共 60 分 21 解方程 1 1 3 1 6 2 xx 22 如图 6 在两面墙之间有一个底端在 A 点的梯子 当它靠在一侧墙上时 梯子的顶端在 B 点 当它靠在另一侧墙上时 梯子的顶端在 D 点 已知 BAC 60 DAE 45 点 D 到地面的垂直距离 DE 3m 求点 B 到地面的垂直距离 BC 2 图 6 23 在一次蜡烛燃烧实验中 甲 乙两根蜡烛燃烧时剩余部分的高度 y cm 与燃烧时间 x h Do the following three main points 1 find out the weak Review process is to sum up the knowledge on the one hand make the knowledge more coherent system and regularity but also let the students themselves looks up the deficiencies So we teachers to understand the students knowledge of the situation prior to the review students not only found widespread deficiencies but also some shortcomings for these well designed programs reasonable arrangement of time this review is more targeted and more effective For example you can design a form for investigation understanding students weaknesses in each knowledge put it as a review of key combined with the problem of textbooks to review both to avoid casting a net tihaizhanshu and improve the efficiency of review 2 good collation Through six years of study students in the basics reading method exercises and so already have a certain degree of accumulation the review stage teachers should know how to guide the students to label the accumulation process form a system of knowledge networks Exercises for students to be representative fine complete to live and earnestly do a problem learning a method class of pass was to get time efficient review results 3 pay attention to use The accumulation of knowledge is ultimately to use therefore review the situation and life situation to be created in a variety of languages guide students on the basis of the previous accumulation of knowledge to use to the maximum and really apply what they have learned Second review the content and strategy of the first part the basics a 1 review the main points of Hanyu Pinyin is able to recite and write down the alphabet of Hanyu Pinyin accurate spelling pronunciation after reading cacuminal nasal sound light and retroflex sounds the correct write consonants vowels and syllables 2 main types according to the order of the alphabet of Hanyu Pinyin alphabetical order fill in the appropriate uppercase and lowercase letters see phonetic writing words pinyin to write sentences with dot to select the correct pronunciation of the word to bring some initial consonants or vowels word selection Second the main types of words 1 Ruby written words 2 to bring Word to select the correct pronunciation 3 use a sequencer and radical character lookup method 的关系如图 7 所示 请根据图象所提供的信息解答下列问题 甲 乙两根蜡烛燃烧前的高度分别是 从点燃到燃尽所用的时间分别是 分别求甲 乙两根蜡烛燃烧时 y 与 x 之间的函数关系式 当 x 为何值时 甲 乙两根蜡烛在燃烧过程中的高度相等 图 7 24 中华人民共和国道路交通安全法实施条例 中规定 超速行驶属违法行为 为确保行 车安全 一段高速公路全程限速 110 千米 时 即任一时刻的车速都不能超过 110 千米 时 以下是张师傅和李师傅行驶完这段全程为 400 千米的高速公路时的对话片断 张 你的 车速太快了 平均每小时比我多跑 20 千米 少用我 1 小时就跑完了全程 还是慢点 李 虽然我的时速快 但最大时速也不超过我平均时速的 10 可没有超速违法啊 李师傅 超速违法吗 为什么 25 如图 8 在一张圆桌 圆心为点 O 的正上方点 A 处吊着一盏照明灯 实践证明 桌子边 沿处的光的亮度与灯距离桌面的高度 AO 有关 且当 sin ABO 时 桌子边沿处点 B 3 6 的光的亮度最大 设 OB 60cm 求此时灯距离桌面的高度 OA 结果精确到 cm 图 8 26 如图 9 ABO 中 OA OB 以 O 为圆心的圆经过 AB 的中点 C 且分别交 OA OB 于 点 E F 1 求证 AB 是 O 的切线 2 若 ABO 腰上的高等于底边的一半 且 求的长 34 AB 图 9 O A B C E F Do the following three main points 1 find out the weak Review process is to sum up the knowledge on the one hand make the knowledge more coherent system and regularity but also let the students themselves looks up the deficiencies So we teachers to understand the students knowledge of the situation prior to the review students not only found widespread deficiencies but also some shortcomings for these well designed programs reasonable arrangement of time this review is more targeted and more effective For example you can design a form for investigation understanding students weaknesses in each knowledge put it as a review of key combined with the problem of textbooks to review both to avoid casting a net tihaizhanshu and improve the efficiency of review 2 good collation Through six years of study students in the basics reading method exercises and so already have a certain degree of accumulation the review stage teachers should know how to guide the students to label the accumulation process form a system of knowledge networks Exercises for students to be representative fine complete to live and earnestly do a problem learning a method class of pass was to get time efficient review results 3 pay attention to use The accumulation of knowledge is ultimately to use therefore review the situation and life situation to be created in a variety of languages guide students on the basis of the previous accumulation of knowledge to use to the maximum and really apply what they have learned Second review the content and strategy of the first part the basics a 1 review the main points of Hanyu Pinyin is able to recite and write down the alphabet of Hanyu Pinyin accurate spelling pronunciation after reading cacuminal nasal sound light and retroflex sounds the correct write consonants vowels and syllables 2 main types according to the order of the alphabet of Hanyu Pinyin alphabetical order fill in the appropriate uppercase and lowercase letters see phonetic writing words pinyin to write sentences with dot to select the correct pronunciation of the word to bring some initial consonants or vowels word selection Second the main types of words 1 Ruby written words 2 to bring Word to select the correct pronunciation 3 use a sequencer and radical character lookup method 27 某食品零售店为仪器厂代销一种面包 未售出的面包可退回厂家 以统计销售情况发 现 当这种面包的单价定为 7 角时 每天卖出 160 个 在此基础上 这种面包的单价每提高 1 角时 该零售店每天就会少卖出 20 个 考虑了所有因素后该零售店每个面包的成本是 5 角 设这种面包的单价为 x 角 零售店每天销售这种面包所获得的利润为 y 角 用含 x 的代数式分别表示出每个面包的利润与卖出的面包个数 求 y 与 x 之间的函数关系式 当面包单价定为多少时 该零售店每天销售这种面包获得的利润最大 最大利润为 多少 28 我市某区对参加模拟考试的 8000 名学生的数学成绩进行抽样调查 抽取了部分学会上 的数学成绩 分数为整数 进行统计 绘制成频率分布直方图 如图 10 已知从左到右五个 小组的频数之比为 6 7 11 4 2 第五小组的频数为 40 1 本次调查共抽调了多少名学生 2 若 72 分以上 含 72 分 为及格 96 分以上 含 96 分 为优秀 那么抽取的学生中及格的人 数 优秀的人数各占所抽取人数的百分之多少 3 根据 2 中的结论 该区所以参加市模拟考试的学生 及格 优秀人数各约是多少 人 图 10 参考答案 一 1 C 2 C 3 B 4 D 5 B 6 A 7 B 8 D 9 C 10 C 二 11 乙 12 13 20 20 14 y x 2 2 3 等 15 6 16 方差 17 x y 2 3 4 37 18 8 19 减小 20 62 2 22 ab 三 21 解 6 3 x 1 x2 1 x2 3x 4 0 x 4 x 1 0 x1 4 x2 1 经检验 x 1 是增根 应舍去 所以原方程的解为 x 4 22 因为 DE 所以 AD 6 AB 6 所以 BC 3m233 23 30cm 25cm 2h 2 5h Do the following three main points 1 find out the weak Review process is to sum up the knowledge on the one hand make the knowledge more coherent system and regularity but also let the students themselves looks up the deficiencies So we teachers to understand the students knowledge of the situation prior to the review students not only found widespread deficiencies but also some shortcomings for these well designed programs reasonable arrangement of time this review is more targeted and more effective For example you can design a form for investigation understanding students weaknesses in each knowledge put it as a review of key combined with the problem of textbooks to review both to avoid casting a net tihaizhanshu and improve the efficiency of review 2 good collation Through six years of study students in the basics reading method exercises and so already have a certain degree of accumulation the review stage teachers should know how to guide the students to label the accumulation process form a system of knowledge networks Exercises for students to be representative fine complete to live and earnestly do a problem learning a method class of pass was to get time efficient review results 3 pay attention to use The accumulation of knowledge is ultimately to use therefore review the situation and life situation to be created in a variety of languages guide students on the basis of the previous accumulation of knowledge to use to the maximum and really apply what they have learned Second review the content and strategy of the first part the basics a 1 review the main points of Hanyu Pinyin is able to recite and write down the alphabet of Hanyu Pinyin accurate spelling pronunciation after reading cacuminal nasal sound light and retroflex sounds the correct write consonants vowels and syllables 2 main types according to the order of the alphabet of Hanyu Pinyin alphabetical order fill in the appropriate uppercase and lowercase letters see phonetic writing words pinyin to write sentences with dot to select the correct pronunciation of the word to bring some initial consonants or vowels word selection Second the main types of words 1 Ruby written words 2 to bring Word to select the correct pronunciation 3 use a sequencer and radical character lookup method 设甲蜡烛燃烧时 y 与 x 之间的函数关系式为 11 bxky 由图可知 函数的图象过点 2 0 0 30 所以 解得 所以 11 1 20 30 kb b 1 1 15 30 k b 1530yx 设乙蜡烛燃烧时 y 与 x 之间的函数关系式为 22 yk xb 由图可知 函数的图象过点 2 5 0 0 25 所以 解得 所以 22 2 2 50 25 kb b 2 2 10 25 k b 1025yx 由题意得 解得 25103015 xx1 x 所以 当甲 乙两根蜡烛燃烧 1h 的时候高度相等 24 解 设李师傅的平均速度为 x 千米 时 则张师傅的平均速度为 x 20 千米 时 根据题意 得 去分母 整理 得 400400 1 x20 x 2 x20 x80000 解得 12 x100 x80 经检验 都是所列方程的根 但不符合题意 舍去 12 x100 x80 2 x80 所以 x 100 所以李师傅的最大时速是 100 1 10 110 所以李师傅行驶途中的最大时速在限速范围内 他没有超速违法 25 因为 sin AOB 所以设 OA x AB 3x 则 3x 2 x 2 602 3 6 AB OA 66 解得 x 35 即 OA 长为 35cm 26 解 1 证明 连结 OC 因为 OA OB AC BC 所以 OC AB 所以 AB 是 O 的切线 2 过 B 点作 BD AO 交 AO 的延长线于 D 点 由题意有 AB 2BD 由题目条件 有 34 AB 在 Rt ABD 中 根据正弦定义 2 1 sin AB BD A 所以 A 30 在 Rt ACO 中 A 30 则 AO 2 32 2 1 ABAC 由勾股定理 求得 OC 2 因为 O