初三试题精选(2)
九年级中考试题及答案
九年级中考试题及答案一、单项选择题(每题2分,共20分)1. 下列哪个选项是正确的?A. 地球是宇宙的中心B. 太阳是宇宙的中心C. 地球围绕太阳公转D. 太阳围绕地球公转答案:C2. 光年是指:A. 光在一年内传播的距离B. 光在一天内传播的距离C. 光在一小时内传播的距离D. 光在一分钟内传播的距离答案:A3. 以下哪个国家位于南美洲?A. 加拿大B. 巴西C. 澳大利亚D. 南非答案:B4. 人体最大的消化器官是:A. 胃C. 肝脏D. 大肠答案:B5. 以下哪个方程式表示的是水的电解反应?A. H2O → H2 + O2B. 2H2O → 2H2 + O2C. H2 + O2 → H2OD. 2H2 + O2 → 2H2O答案:B6. 牛顿第一定律描述的是:A. 物体在没有外力作用下的运动状态B. 物体在受到平衡力作用下的运动状态C. 物体在受到非平衡力作用下的运动状态D. 物体在受到摩擦力作用下的运动状态答案:A7. 以下哪个选项是正确的?A. 所有金属都能被磁铁吸引B. 只有铁、钴、镍能被磁铁吸引C. 所有金属都不能被磁铁吸引D. 只有铁、钴、镍不能被磁铁吸引答案:B8. 以下哪个国家是联合国安全理事会常任理事国之一?B. 巴西C. 中国D. 印度答案:C9. 以下哪个选项是正确的?A. 植物的光合作用需要氧气B. 植物的光合作用需要二氧化碳和水C. 植物的光合作用产生氧气D. 植物的光合作用不产生二氧化碳答案:B10. 以下哪个选项是正确的?A. 声音不能在真空中传播B. 声音可以在真空中传播C. 声音只能在空气中传播D. 声音只能在液体中传播答案:A二、填空题(每题2分,共20分)1. 地球的自转周期是______小时。
答案:242. 人体所需的六大营养素包括糖类、脂肪、蛋白质、维生素、水和______。
答案:无机盐3. 牛顿第二定律的公式是______。
答案:F=ma4. 光的三原色是红、绿和______。
初三考试题目及答案大全
初三考试题目及答案大全一、选择题(每题2分,共10分)1. 下列词语中,有错别字的一项是()A. 锲而不舍B. 栩栩如生C. 再接再励D. 相得益彰答案:C2. 下列句子中,标点符号使用正确的一项是()A. 他,是我们班的班长。
B. 他,是我们班的班长?C. 他,是我们班的班长!D. 他,是我们班的班长。
答案:D3. 下列句子中,没有语病的一项是()A. 通过这次活动,使我们认识到了团结协作的重要性。
B. 他不仅学习好,而且品德高尚。
C. 为了防止这类事故不再发生,我们必须采取有效措施。
D. 他因为迟到了,所以被老师批评了。
答案:B4. 下列关于文学作品的表述,不正确的一项是()A. 《红楼梦》是清代作家曹雪芹所著。
B. 《哈姆雷特》是莎士比亚的四大悲剧之一。
C. 《巴黎圣母院》是法国作家雨果的代表作。
D. 《百年孤独》是哥伦比亚作家马尔克斯的代表作。
答案:A5. 下列关于历史事件的表述,正确的一项是()A. 秦始皇统一六国,结束了春秋战国时期的分裂局面。
B. 汉武帝时期,张骞出使西域,开辟了丝绸之路。
C. 唐朝时期,玄奘西行取经,将佛教经典带回中国。
D. 明朝时期,郑和下西洋,加强了与东南亚国家的联系。
答案:D二、填空题(每题2分,共10分)1. 鲁迅的《朝花夕拾》是一部_______体散文集。
答案:回忆2. 李白的《将进酒》中,“君不见黄河之水天上来”的下一句是_______。
答案:奔流到海不复回3. 《论语》中,“学而时习之,不亦说乎”的下一句是_______。
答案:有朋自远方来4. 世界四大文明古国包括古埃及、古巴比伦、古印度和_______。
答案:古中国5. 牛顿的三大定律中,描述物体运动状态改变的定律是_______。
答案:牛顿第二定律三、简答题(每题5分,共15分)1. 简述《水浒传》中“智取生辰纲”的故事梗概。
答案:《水浒传》中的“智取生辰纲”是晁盖、吴用等人策划的一次劫富济贫的行动。
初三数学第二单元试题及答案
初三数学第二单元试题及答案一、选择题(每题2分,共10分)1. 下列哪个数是无理数?A. 3.14159B. πC. 0.33333D. √22. 一个数的平方根等于它本身,这个数是:A. 1B. 0C. -1D. 23. 一个二次方程的系数a、b、c分别为2、-3、2,那么这个方程的判别式Δ是:A. 1B. -1C. 5D. 94. 一个三角形的三边长分别为3、4、5,那么这个三角形是:A. 等腰三角形B. 直角三角形C. 等边三角形D. 等差三角形5. 一个数列的前三项为1,3,6,第四项是:A. 9B. 10C. 12D. 15二、填空题(每题2分,共10分)6. 一个数的绝对值是5,这个数可以是________。
7. 一个二次方程的一般形式是________。
8. 一个三角形的内角和等于________度。
9. 一个数的立方根是2,那么这个数是________。
10. 一个数的相反数是-5,这个数是________。
三、计算题(每题5分,共15分)11. 计算√(-4)²的值。
12. 解方程:2x + 3 = 7。
13. 证明:(a + b)² = a² + 2ab + b²。
四、解答题(每题10分,共20分)14. 一个直角三角形的两条直角边分别是6和8,求斜边的长度。
15. 一个二次方程的系数a=1,b=-6,c=8,求该方程的根。
五、应用题(每题15分,共15分)16. 某工厂生产一种产品,每件产品的成本是10元,销售价格是15元。
如果工厂希望获得的利润是总销售额的20%,那么每件产品的销售价格应该调整为多少?答案:一、选择题1. B2. B3. B4. B5. D二、填空题6. ±57. ax² + bx + c = 0 (a ≠ 0)8. 1809. 810. 5三、计算题11. √(-4)² = 412. 2x + 3 = 7 → 2x = 4 → x = 213. 证明略四、解答题14. 根据勾股定理,斜边长度为√(6² + 8²) = √(36 + 64) =√100 = 1015. 判别式Δ = b² - 4ac = (-6)² - 4×1×8 = 36 - 32 = 4,根为x₁ = (6 + √4) / 2 = 4,x₂ = (6 - √4) / 2 = 1五、应用题16. 设每件产品的销售价格调整为x元,根据题意得方程:(15 - x)* (x - 10) = 0.2x,解得x = 12.5结束语:本次初三数学第二单元试题涵盖了无理数、二次方程、三角形的性质、数列规律等知识点,希望同学们通过练习能够加深对这些知识点的理解和应用。
2023年广东省中考专题复习精选化学试题(二)
2023年广东省中考专题复习精选化学试题(二)(内容:物质的化学变化)可能用到的相对原子质量:C-12 O-16 S-32 H-1 N-14 C1-35.5 Ba-137 Hg-201 一、单项选择题(每题3分,共45分)1.《天工开物》中记载了古法造纸工艺。
下列步骤中一定发生了化学变化的是 ( ) A.煮楻足火 B.斩竹槌洗 C.日晒成干 D.覆帘压纸2.物质的性质决定其用途。
下列用途是利用物质物理性质的是 ( ) A.稀盐酸用于除铁锈 B.活性炭吸附异味 C.用熟石灰改良酸性土壤 D.酒精可以作燃料3.下列判断错误的是 ( )A.浓硫酸具有脱水性一化学性质B.浓硫酸是一种稠状的液体—物理性质C.NaOH 固体溶于水显碱性一物理性质D.NaOH 固体在空气中易变质一化学性质4.除了元素种类、原子种类不变外,化学反应前后肯定没有变化的还有 ( )A.分子数目B.原子数目C.物质种类D.分子种类5.关于2CO+O 2======CO 2的叙述正确的是 ( ) A.一氧化碳加氧气点燃等于二氧化碳B.2g 一氧化碳和1g 氧气反应生成2g 二氧化碳C.两个一氧化碳分子加一个氧分子等于两个二氧化碳分子D.56g 的一氧化碳和32g 的氧气完全反应能生88g 的二氧化碳 6.工业用盐亚硝酸钠(NaNO 3)与食盐很像,但有毒,亚硝酸钠分解生成一种有刺激性气味的气体,该气体可能是 ( ) A.NH 3 B.SO 2 C.N 2 D.NO 2 7.下列关于质量守恒定律的说法正确的是 ( )A.高锰酸钾分解后固体质量变小,符合质量守恒定律B.只要有气体参加或生成的反应均不遵守质量守恒定律C.10g 白糖完全溶于70g 水可得到80g 糖水,遵守质量守恒定律D.引燃密闭容器中的ag 氢气和bg 氧气,冷却后得到水的质量一定等于(a+b)g 8.已知某纯净物23g 在足量的氧气中充分燃烧后,生成4.4g 二氧化碳和2.7g 水。
初三语文试题 (2)
夏津六中葛荣永
积累与运用 阅读 作文
字音 字形
积累与运用
成语
标点
文学常识
修改病句
名著阅读
诗词填空
综合性学习
字音和字词:
基础知识不
扎实。
多读、多练,好记
性不如烂笔头。
成语: 摘录 积累
修改病句:
加强修改符号的训练。
综合性学习:
失分原因:
1、总结片面、不完整。
2、总结不到要点上。 3、表述性语言不准确,缺乏逻辑。 措施: 1、重视表头。 2、横向比较和纵向比较相结合。
阅读:
1、古诗词赏析
2、课内文言文
3、课外文言文
1、赏析重点字词。 2、理解重点句子。 3、品味富有表现力的语言、表 现手法和修辞手法。 4、把握作品的题旨和意境以及 作者的思想感情。
阅读之课内文言文:
失分原因:
1、讲课时这些考点没有明确来。 2、遗忘症在起作用。 3、翻译不通畅、不完整。 4、一知半解。 措施: 把知识点落到实处。
阅读之课外文言文:
一点建议:
夯实课内文言文,学会知识的迁移。
阅读之现代文
存在情况: 1、答题区域字迹乱。 2、答得少得分少。 3、答得少得分却不少。 4、答得多得分却不多。 措施: 1、通读文章,做简单题。 2、带着疑难问题重读相关段落。 3、再读文章,查漏补缺。
作文:
失分原因:
1、擅改题目。
2、未达到规定字数。 3、开始的几个段落出现错字或病句。 4、跑题。 5、套用作文,得不偿失。 6、字迹乱,卷面不整洁。
适合初三的试题卷子及答案
适合初三的试题卷子及答案一、选择题(每题2分,共20分)1. 下列哪个选项是正确的?A. 地球是平的B. 地球是圆的C. 地球是方的D. 地球是三角形的2. 根据题目1,正确答案是:A. AB. BC. CD. D3. 以下哪个是化学元素的符号?A. H₂OB. CO₂C. NaClD. CaCO₃4. 根据题目3,正确答案是:A. AB. BC. CD. D5. 以下哪个是物理变化?A. 铁生锈B. 水蒸发C. 木头燃烧D. 硫酸与水混合6. 根据题目5,正确答案是:A. AB. BC. CD. D7. 下列哪个是数学中的几何图形?A. 直线B. 圆C. 椭圆D. 所有选项8. 根据题目7,正确答案是:A. AB. BC. CD. D9. 以下哪个是生物分类的基本单位?A. 界B. 门C. 纲D. 种10. 根据题目9,正确答案是:A. AB. BC. CD. D二、填空题(每空2分,共20分)11. 地球绕着_________转动。
12. 化学元素的符号通常由一个大写字母表示,如果有两个字母,则第一个字母大写,第二个字母小写。
13. 物理变化和化学变化的区别在于是否有新物质生成,物理变化没有新物质生成,而化学变化有_________。
14. 在数学中,几何图形包括点、线、面、体等,其中_________是最基本的几何元素。
15. 生物分类的等级由大到小依次为界、门、纲、目、科、属、_________。
三、简答题(每题10分,共20分)16. 请简述牛顿的三大定律。
17. 请简述光合作用的过程。
四、计算题(每题15分,共30分)18. 若一个物体的质量为5千克,受到的重力为49牛顿,请计算该物体在月球上的重力。
(月球的重力加速度为地球的1/6)19. 一个直角三角形的两条直角边分别为3厘米和4厘米,请计算该三角形的斜边长度。
五、论述题(10分)20. 请论述学习科学知识的重要性。
答案一、选择题1. B2. B4. B5. B6. B7. D8. D9. D10. D二、填空题11. 太阳12. 新物质生成13. 新物质生成14. 点15. 种三、简答题16. 牛顿的三大定律包括:第一定律(惯性定律),第二定律(动力定律),第三定律(作用与反作用定律)。
初三上学期圆专题检测考试试题2
一、选择题(每小题2分,共40分)1.已知⊙O 1、⊙O 2的半径分别是12r =、24r =,若两圆相交,则圆心距O 1O 2可能取的值是( ).A 、2 B 、4 C 、6 D 、82.外切两圆的半径分别为2 cm 和3cm ,则两圆的圆心距是( )A .1cm B .2cm C .3cmD .5cm3.已知两圆的半径分别是3和2,圆心的坐标分别是(0,2)和(0,-4),那么两圆的位置关系是( ) A.内含 B.相交 C.相切 D.外离4.已知两圆内切,它们的半径分别为3和6,则这两圆的圆心距d 的取值满足( )A .9d > B . 9d = C . 39d << D .3d =5.已知圆O 1、圆O 2的半径不相等,圆O 1的半径长为3,若圆O 2上的点A 满足AO 1 = 3,则圆O 1与圆O 2的位置关系是( )A .相交或相切 B .相切或相离 C .相交或内含 D .相切或内含6.已知两圆的半径分别是2㎝和4㎝,圆心距是6㎝,那么这两圆的位置关系是 ( ) (A )外离 (B )外切 (C )相交 (D )内切7.已知⊙O 1与⊙O 2的半径分别为2和3,两圆相交,则两圆的圆心距m 满足( ) A .m =5 B .m =1 C .m >5 D .1<m <59.两圆的半径分别为2和1,圆心距为3,则反映这两圆位置关系的为图( )。
10.已知1o 和2o 的半径分别是3cm 和5cm ,若12o o =1cm ,则1o 与2o 的位置关系是( )A . 相交 B. 相切 C. 相离 D. 内含11.已知两圆的半径分别为3cm 和4cm ,两个圆的圆心距为8cm ,则两圆的位置关系是( ) A.内切 B.相交 C.外离 D.外切12.如果一个扇形的弧长等于它的半径,那么此扇形称为“等边扇形”. 则 半径为2的“等边扇形”的面积为 ( )A .π B .1C .2D .23π 13. 现有一个圆心角为90,半径为cm 8的扇形纸片,用它恰好围成一个圆锥的侧面(接缝忽略不计).该圆锥底面圆的半径为( )A . cm 4 B .cm 3 C .cm 2 D .cm 114.一个圆锥的底面半径为6㎝,圆锥侧面展开图扇形的圆心角为240°,则圆锥的母线长为( ) A .9㎝ B .12㎝ C .15㎝ D .18㎝ 15.如图,在8×4的方格(每个方格的边长为1个单位长)中,⊙A 的半径为1,⊙B 的半径为2,将⊙A 由图示位置向右平移1个单位长后,⊙A 与静止的⊙B 的位置关系是( ).A.内含 B.内切 C.相交 D.外切16.如图,两圆相交于A ,B 两点,小圆经过大圆的圆心O ,点C ,D 分别在两圆上,若100ADB ∠=︒,则ACB∠的度数为 ( )A .35︒B .40︒C .50︒D .80︒17.如图,如果从半径为9cm 的圆形纸片剪去13圆周的一个扇形,将留下的扇形围成一个圆锥(接缝处不重叠),那么这个圆锥的高为( )A .6cm B . C .8cm D .18.如图,5个圆的圆心在同一条直线上, 且互相相切,若大圆直径是12,4个小圆大小相等,则这5个圆的周长的和为 ( )A. 48π B. 24π C. 12π D. 6π19.已知圆锥的底面半径为2cm ,母线长为5cm ,则圆锥的侧面积是( )A .20cm 2B .20πcm 2C .10πcm 2D .5πcm 220.已知圆锥的母线长为4,底面半径为2,则圆锥的侧面积等于( )A .8π B .9π C .10π D .11π 二、填空题(每小题2分,共38分)1.如图,在以O 为圆心的两个同心圆中,大圆的弦AB 与小圆相切于点C ,若大圆的半径为5 cm ,小圆的半径为3 cm ,则弦AB 的长为_______cm .2.半径为r 的圆内接正三角形的边长为 .(结果可保留根号) 3.如图是一条水平铺设的直径为2米的通水管道横截面,其水面为1.6米,则这条管道中此时最深为 米。
《桃花源记》中考试题集锦及答案(精选) (2)
《桃花源记》中考试题集锦一.(2004 ·肇庆) 见渔人, 乃大惊, 问所从来, 具答之 。
便要还家, 设酒杀鸡作食。
村中闻有此人, 咸来问讯。
自云先世避秦时乱, 率妻子邑人来此绝境, 不复出焉, 遂与外人间隔 。
问今是何世, 乃不知有汉, 无论魏晋 。
此 人一一为具言所闻, 皆叹惋。
令人各复延至其家, 皆出酒食。
停数日, 辞去。
此中人语云: “不足为外人道也。
”1 .下列句中加点词意思相同的一项是: ( )A .①率妻子邑人来此绝境 ②奇山异水,天下独绝B .①遂与外人间隔②肉食者谋之,又何间焉 C .①此人一一为具言所闻②色愈恭,礼愈至,不敢出一言 以复D .①停数日,辞去 ②鸣声上下,游人去而禽鸟乐也 2.文中能表明桃花源中人听了渔人的话后,虽“叹惋”但仍想继续在桃花源里生活的一句话是。
3 .用现代汉语翻译文中画横线的句子。
问今是何世,乃不知有汉,无论魏晋。
译: 二. (07 重庆市, 15 分) 林尽水源, 便得一山, 山有小口, 彷佛若有光, 便舍船, 从口入。
初极狭, 才通人 。
复行数十步, 豁然开朗 。
土地平旷, 屋舍俨然, 有 良田美池桑竹之属。
阡陌交通, 鸡犬相闻。
其中往来种作, 男女衣著, 悉如外人。
黄发垂髫,并怡然自乐。
见渔人, 乃大惊, 问所从来。
具答之。
便要还家, 设酒杀鸡作食。
.. . . . . . .村中闻有此人, 咸来问讯。
自云先世避秦时乱, 率妻子邑人来此绝境, 不复出焉, 遂与外人间隔 。
问今是何世, 乃不知有汉, 无论魏晋 。
此 人一一为具言所闻, 皆叹惋。
余人各复延至其家, 皆出酒食。
停数日, 辞去。
此中人语云: “不足为外人道也。
”1 .解释下面句中加点字词的的含义。
(1)有良田、美池、桑竹之属 (2)悉如外人 (3)余人各复延至其家2.下面加点词的意思和现代汉语相同的一项是 ( ) A . 仿佛..若有光 C .率妻子邑人来此绝境 B .阡陌交通.. ,鸡犬相闻 D .乃不知有汉,无论魏、晋 3 .用现代汉语翻译下面的句子。
初三人教版历史中考试题及答案(2)
初三历史中考模拟试题(2)第I卷(选择题共20分)选择题(下列各题的四个选项中,只有一个符合题意。
每小题1分,共20分。
)1.据史书记载,“公元前127年,汉皇帝下了一道命令,规定嫡长子只可继承封地的一半,余下的封底分给其他子弟。
于是,封地不断缩小,其重要性也不断下降。
”这段材料主要体现了汉武帝的哪一项措施?A.颁布“推恩令”B. 实行分封制C. 派张骞出使西域D.罢黜百家,独尊儒术2.下列中国古代四个历史时期中央行政系统的简表中,属于秦朝的是A B C D3.中华大地,人杰地灵,英雄辈出。
下列古代历史才俊按其生活时代的先后顺序排列正确的是①郦道元②李春③王羲之④华佗⑤毕昇⑥鉴真A.④③①②⑥⑤ B.①②③④⑤⑥ C.③④①②⑤⑥ D.④①③⑥②⑤4.某同学查阅了有关“赤壁之战”、“三国鼎立”、“人口南迁”、“北魏孝文帝改革”的一些历史资料进行主题探究,他探究的主题是A.统一国家的建立B.政权分立与民族融合C.繁荣与开放的社会D.民族关系的发展5.据史书记载,唐都长安的崇仁坊多修造乐器的商店;延寿坊有出售金银珠宝店;胜业坊有“以小车推蒸饼卖之”;永昌坊有茶肆;新昌坊有客舍。
这一记载表明当时A.农业生产发展B.商业经济繁荣C.对外贸易活跃D.经济重心南移6.下列关于两宋时期少数民族首领和其所建立政权的对应关系,不正确的是A.阿骨打——女真 B.元昊——西夏 C.阿保机——契丹 D.铁木真——蒙古7.此书记载的是马可·波罗在中国元代的所见所闻。
元代在图2中的位置是A.①B.④C.③D.②8.右图漫画再现了19世纪40年代中国屈辱的场景。
图中持短枪的外国人代表的国家是A.美国B.法国C.日本D.英国9.洋务运动虽然失败了,但积极作用也不容抹杀,从客观上来讲主要是A.培养了技术力量B.为中国近代企业积累了生产经验C.引进了一批人才D.为中国的近代化开辟了道路10.五四运动形成了爱国、进步、民主、科学的“五四精神”。
初三年级练习题
初三年级练习题题一:数学1. 小明的体重是50kg,他每天运动消耗的能量为320卡,如果他连续锻炼7天,并且不进行其他补充,那么他的减重幅度是多少kg?2. 一支高为10cm的蜡烛点燃后,在3小时内燃烧完,求烛芯每小时减少多少cm?3. 一条铁轨上有一辆火车和一台卡车,当火车从卡车后经过全长900m的铁轨所需的时间是50秒,当卡车从火车后经过全长1000m的铁轨所需的时间是60秒,求火车的全长和卡车的全长各是多少m?题二:语文阅读下面的短文,按要求完成题目。
短文:太白山是中国著名的风景名胜区,每年吸引着大批游客前来观光。
太白山的主峰海拔3771.2米,是中国五岳之一。
太白山风景秀丽,四季分明。
山上有很多摄影爱好者,他们专注于捕捉不同天气、不同时段下的太白山美景。
此外,太白山还是很多诗人、文人青睐的地方,他们在这里寻找创作的灵感。
1. 根据短文内容,回答问题:太白山是中国的哪座山之一?2. 简述太白山的主峰海拔高度。
3. 短文中提到了太白山上的哪两种群体?4. 你对太白山感兴趣吗?请简要说明你的理由。
题三:英语根据所给信息,完成下面的对话。
每空一词。
A: Hi, Linda! Do you have any plans for the weekend?B: Hi, Tom! I'm not sure yet. __1__ you have any suggestions?A: How about going to the movies? There's a new blockbuster playing at the theater.B: That sounds __2__ a good idea. __3__ is the movie showing?A: It's showing at 7:30 p.m. __4__ don't we meet at the theater at 7:00 p.m.?B: That works for me. See you there!A: __5__ forward to it. See you then!题四:综合素养请以“珍惜友谊”为话题,写一篇120-150字的短文。
初三的考试题目及答案
初三的考试题目及答案一、选择题(每题2分,共20分)1. 下列哪个选项是正确的?A. 地球是宇宙的中心B. 地球围绕太阳旋转C. 太阳围绕地球旋转D. 地球是静止不动的答案:B2. 以下哪个历史事件标志着中国封建社会的开始?A. 秦始皇统一六国B. 汉武帝开疆拓土C. 唐朝盛世D. 明朝海禁政策答案:A3. 以下哪个公式是计算圆的面积的?A. A = πr²B. A = 2πrC. A = πdD. A = πr答案:A4. 以下哪个选项是化学变化?A. 水的沸腾B. 铁的生锈C. 冰的融化D. 玻璃的破碎答案:B5. 以下哪个选项是生物的特征?A. 需要营养B. 能进行光合作用C. 能进行呼吸D. 所有选项答案:D6. 以下哪个选项是正确的英语语法?A. I am go to school.B. I go to school.C. I am going to school.D. I go to the school.答案:C7. 以下哪个选项是正确的数学定理?A. 勾股定理B. 毕达哥拉斯定理C. 欧几里得定理D. 所有选项答案:D8. 以下哪个选项是正确的物理概念?A. 牛顿第一定律B. 牛顿第二定律C. 牛顿第三定律D. 所有选项答案:D9. 以下哪个选项是正确的地理知识?A. 地球是平的B. 地球是圆的C. 地球是方的D. 地球是三角形的答案:B10. 以下哪个选项是正确的计算机术语?A. 软件B. 硬件C. 网络D. 所有选项答案:D二、填空题(每题2分,共20分)1. 地球的自转周期是______。
答案:24小时2. 中国历史上的四大发明包括指南针、造纸术、印刷术和______。
答案:火药3. 圆的周长公式是______。
答案:2πr 或πd4. 化学变化的特征是______。
答案:新物质的生成5. 生物的基本特征包括需要营养、能进行呼吸、能排出废物、能对外界刺激作出反应、能生长和繁殖、具有遗传和变异的特性、除病毒外,生物都是由细胞构成的。
初三考试题目试卷及答案
初三考试题目试卷及答案一、选择题(每题2分,共20分)1. 下列关于光合作用的说法,正确的是:A. 光合作用是植物吸收二氧化碳和水,释放氧气的过程B. 光合作用是植物吸收氧气和水,释放二氧化碳的过程C. 光合作用是植物吸收二氧化碳和水,释放氧气和葡萄糖的过程D. 光合作用是植物吸收氧气和水,释放二氧化碳和葡萄糖的过程答案:C2. 以下哪个选项是描述细胞核的功能?A. 细胞核是细胞的控制中心B. 细胞核是细胞的能量工厂C. 细胞核是细胞的废物处理中心D. 细胞核是细胞的保护外壳答案:A3. 以下哪个选项是描述DNA的功能?A. DNA是细胞的遗传物质B. DNA是细胞的能量来源C. DNA是细胞的保护外壳D. DNA是细胞的废物处理中心答案:A4. 以下哪个选项是描述细胞膜的功能?A. 细胞膜控制物质进出细胞C. 细胞膜是细胞的能量来源D. 细胞膜是细胞的废物处理中心答案:A5. 下列关于生态系统的说法,正确的是:A. 生态系统只包括生物部分B. 生态系统只包括非生物部分C. 生态系统包括生物部分和非生物部分D. 生态系统是单一的生物群落答案:C6. 以下哪个选项是描述植物细胞壁的功能?A. 细胞壁是细胞的遗传物质B. 细胞壁是细胞的能量来源C. 细胞壁提供细胞支持和保护D. 细胞壁是细胞的废物处理中心答案:C7. 以下哪个选项是描述线粒体的功能?A. 线粒体是细胞的遗传物质B. 线粒体是细胞的能量工厂C. 线粒体是细胞的废物处理中心D. 线粒体是细胞的保护外壳答案:B8. 以下哪个选项是描述叶绿体的功能?B. 叶绿体是细胞的能量来源C. 叶绿体是细胞的废物处理中心D. 叶绿体是细胞的保护外壳答案:B9. 下列关于基因的说法,正确的是:A. 基因是DNA上具有遗传效应的片段B. 基因是细胞的能量来源C. 基因是细胞的废物处理中心D. 基因是细胞的保护外壳答案:A10. 以下哪个选项是描述细胞分裂的过程?A. 细胞分裂是细胞的遗传物质复制的过程B. 细胞分裂是细胞的能量来源C. 细胞分裂是细胞的废物处理中心D. 细胞分裂是细胞的保护外壳答案:A二、填空题(每空1分,共20分)1. 光合作用是植物通过______吸收光能,将______和水转化为______和氧气的过程。
新目标初三上册英语Unit3测试试题及答案(2)
新目标初三上册英语Unit3测试试题及答案(2)四. 阅读理解(每小题2分,共30分)❋ A ❋It’s hard to imagine that just 25 years ago, Berlin was a city split (分开) into two by the Berlin Wall. I’ll never forget how people were excited as the Berlin Wall came down in 1989. Since then, Berlin has become one of the coolest cities in Europe. Here are the main reasons why I think Berlin is cool.It’s affordable. Berlin has cheap hotels and everyday objects. You don’t have to worry about spending too much money when visiting Berlin.It has fantastic festivals. Berlin knows how to give parties, and there is a festival here every month of the year. Perhaps the most famous is the Berlin International Film Festival.It has great architecture (建筑设计). Berlin has beautiful architecture of its own. The Brandenburg Gate, built in the 18th century, is one of the city’s most famous buildings, symbolizing more than 200 years of history. The TV Tower is as good as the Eiffel Tower in Paris and the London Eye.The art scene is flourishing (繁荣). Berlin is a city of living art. Artists are allowed to create works of art on the sides of buildings.If you want to visit an affordable European city with culture and lots of colors, Berlin is the place to be. What are you waiting for? Get to Europe’s coolest city before everyone else discovers it.根据材料内容选择最佳答案。
人教版初三下册英语Unit9期末单元练习试题及答案(2)
人教版初三下册英语Unit9期末单元练习试题及答案(2)Ⅲ. 阅读理解(每小题2分, 满分20分)ABasketball stars become hip-hop singers. It’s true. In NBA, hip-hop music is very popular. Many of the players, like Shaquille O’Neal of the Los Angeles Lakers, write rap (说唱) words when they travel on planes from one city to another. Some of them even have rap radio shows and others perform (表演) in music video.When some of the younger stars play basketball, they even try to look like hip-hop singers. “Hip-hop is just part of their culture,” says one player. “All of us grew up listening to rap and playing basketball, and rappers grew up doing the same thing.”Master P. is a famous rap star who wants to become a basketball player. Two NBA teams have invited him to join them. They enjoy listening to his music. An NBA player has become a rapper. He has made four successful rap albums (专辑).NBA has a closer connection to hip-hop than any other sports league.46. Many basketball players in NBA like ________.A. hip-hop musicB. country musicC. American singersD. dancing47. Many NBA players ________ rap words when they travel on planes from one city to another.A. learnB. writeC. singD. dance48. ________ is just part of the NBA pla yers’ culture.A. MusicB. RapperC. Hip-hopD. Basketball49. The NBA teams invited Master P. to join them just because ________.A. they like listening to his musicB. his dancing was popularC. they like his face and hairD. his hip-hop was popular50. Which of the following is NOT right?A. Many NBA players have become hip-hop rappers.B. A rapper wants to become an NBA basketball player.C. Players in NBA don’t like hip-hop music at all.D. NBA basketball teams have closer connection to hip-hop music.BYou have waited 45 minutes for the valuable 10 minutes’ break. But when the bell for the next class rings, you can’t believe how quickly time has passed. If you have this experience, you’ll know how time flies when you are having fun and drags when you are bored. Now scientists have come up with a reason why this happens.They have found that the brain changes its way to work according to how we direct our attention to a task. When we are bored, we pay more attention to how time is passing. And this makes our brains think the clock is ticking more slowly.Recently some researchers who want to understand the conditions carried out an experiment. In the experiment, twelve volunteers watched a picture while researchers monitored (关注) their brain activity.The volunteers were told to first notice how long a picture appeared, then the color of the picture, and thirdly, study the both. The results showed that the brain was more active when the volunteers paid attention to more subjects.It is thought that if the brain is busy noticing many aspects (方面) of a task, it has to spread its resources, and pays less attention to the clock. Therefore, time seems to go quickly. If thebrain is not so active, it spends its full energy on the passing of time. As a result, time seems to move slowly.Next time you feel bored in class, perhaps you should concentrate on what the teacher is saying.51. What does the underlined word “drags” probably mean?A. Passes slowly.B. Runs quickly.C. Moves actively.52. What have the scientists found?A. Time goes by fast when we have nothing to do.B. The ten minutes’ break is important to students.C. The brain works in different ways in different situations.53. How did the researchers do the experiment?A. By inviting the volunteers to have a long class.B. By asking the volunteers to pay attention to a clock.C. By monitoring brain activity while volunteers are watchinga picture.54. Which of the following is TRUE according to the passage?A. We will be full of energy if we’re busy.B. Concentrating on things is a way to make people less bored.C. Time goes slowly when the brain is noticing many things at the same time.55. Which is the best title of the passage?A. The best way to save timeB. The importance of planning timeC. The reason for time flying and draggingIV. 任务型阅读(每小题2分,满分10分)阅读下面短文,简要回答所给问题,并将答案写在相应的位置上。
初三中考考试题目及答案
初三中考考试题目及答案一、选择题(每题2分,共20分)1. 下列哪个选项是正确的?A. 地球是太阳系中最大的行星B. 地球是太阳系中唯一有生命的行星C. 地球是太阳系中最小的行星D. 地球是太阳系中唯一的恒星答案:B2. 以下哪个历史事件标志着中国近代史的开端?A. 鸦片战争B. 辛亥革命C. 五四运动D. 抗日战争答案:A3. 以下哪个选项是化学元素周期表中的元素?A. 氢B. 氧C. 氮D. 所有选项答案:D4. 以下哪个公式是计算圆的面积的公式?A. A = πr²B. A = 2πrC. A = πdD. A = πr答案:A5. 以下哪个选项是正确的英语语法规则?A. 动词应该放在句子的最后B. 形容词应该放在名词之前C. 副词应该放在动词之后D. 所有选项答案:B6. 以下哪个选项是正确的数学定理?A. 勾股定理B. 毕达哥拉斯定理C. 欧几里得定理D. 所有选项答案:D7. 以下哪个选项是正确的生物分类?A. 动物界B. 植物界C. 微生物界D. 所有选项答案:D8. 以下哪个选项是正确的物理定律?A. 牛顿第一定律B. 牛顿第二定律C. 牛顿第三定律D. 所有选项答案:D9. 以下哪个选项是正确的地理现象?A. 地球自转B. 地球公转C. 地壳运动D. 所有选项答案:D10. 以下哪个选项是正确的计算机术语?A. 硬件B. 软件C. 网络D. 所有选项答案:D二、填空题(每题2分,共20分)1. 地球的自转周期是______小时。
答案:242. 中国的首都是______。
答案:北京3. 水的化学式是______。
答案:H₂O4. 光年是______单位。
答案:距离5. 牛顿第一定律也被称为______定律。
答案:惯性6. 细胞的基本结构包括细胞膜、细胞质和______。
答案:细胞核7. 世界上最深的海沟是______。
答案:马里亚纳海沟8. 计算机的存储设备分为______和外存。
北京人大附中2024-2025学年度第一学期初三年级语文练习2(10月月考)试题及答案
人大附中2024-2025学年度第一学期初三年级语文练习22024.10考生须知 1.本试卷共10页,共五道大题,27道小题,满分100分。
考试时间150分钟。
2.在答题卡上准确填写姓名、学号。
3.试题答案一律填涂或书写在答题卡上,在试卷上作答无效。
4.在答题卡上,选择题用2B铅笔作答,其他试题用黑色字迹签字笔作答。
一、基础·运用(共14分)校学生会拟举办“君子自强不息”主题文化展览活动,请你协助筹备各部分内容。
第一部分君子文化——中华民族的精神标识君子文化是中华民族特有的精神标识,潜移默化地影响着世代中华儿女,有着永恒的历史价值和时代价值。
君子在个人修养方面要能做到“君子固穷”“君子坦荡荡”“君子泰而不骄”“君子以自强不息”等。
“君子”内涵与时偕行。
新时代,“君子”仍是世人共同推崇的高尚人格。
淬炼君子人格是当代青年立身处世的价值标杆。
1.你想知道“君子固穷”的意思,查阅典籍,发现古代学者的解释为:“固穷”者,言穷当固守也。
你认为“君子固穷”的意思是(2分)A.君子应该固守穷困的境遇,不被外物诱惑而改变自己的追求。
B.君子固然有穷困的时候,只需守候得志之时到来,实现抱负。
C.君子处于穷困条件下,还能固守自己志向,坚持自己的操守。
第二部分自强不息——古今榜样的精神引领“天行健,君子以自强不息。
”这句话出自《周易》,意思是天道运行刚健有力,永无止息。
而君子处世,也应该遵循天道,刚毅坚忍,持之以恒,努力奋进。
古有屈原行于长路,上下求索;有李白长风破浪,扬帆济海;有郑燮千磨万击,迎风坚韧。
今有奥运健儿不惧伤病,勇于夺冠,为国争光;有身残志坚的陆鸿虽患脑瘫,但逆流而上扶贫创业;有华坪女高学子面对坎坷求学路,仍刚强勤敏心怀远志。
新时代青年更要提高自强不息的精神,共同担当起民族复兴的重任,不断塑造自我的人格。
2.你想选以下的一幅书法作品参展,哪幅题字更能体现主题,同学们各抒己见,请你发表看法。
(2分)小东:作品1好。
初三语文中考试题精选及答案
初三语文中考试题精选及答案一、选择题(每题2分,共20分)1. 下列词语中,没有错别字的一项是:A. 徜徉恣意袅袅炊烟斟酌损益B. 恣意翩跹一愁莫展斟酌损益C. 徜徉翩跹一筹莫展斟酌损益D. 徜徉恣意一愁莫展斟酌损益2. 根据题目所给的语境,下列句子中成语使用恰当的一项是:A. 他虽然年过花甲,但仍然精神矍铄,真是老当益壮。
B. 他虽然年过花甲,但仍然精神矍铄,真是老马识途。
C. 他虽然年过花甲,但仍然精神矍铄,真是老态龙钟。
D. 他虽然年过花甲,但仍然精神矍铄,真是老骥伏枥。
3. 下列句子中,没有语病的一项是:A. 通过这次活动,使我们对环保有了更深刻的认识。
B. 这次活动不仅提高了我们的环保意识,而且还增强了我们的实践能力。
C. 这次活动不仅提高了我们的环保意识,而且还使我们增强了实践能力。
D. 通过这次活动,不仅提高了我们的环保意识,而且还增强了我们的实践能力。
4-20. (类似题目,根据实际情况设置)二、填空题(每题2分,共10分)1. “会当凌绝顶,一览众山小”出自唐代诗人______的《望岳》。
2. “春眠不觉晓,处处闻啼鸟”是唐代诗人孟浩然的《春晓》中的名句,其中“晓”的意思是______。
3. “但愿人长久,千里共婵娟”出自宋代词人苏轼的《水调歌头》,其中“婵娟”指的是______。
4. “不以物喜,不以己悲”出自《岳阳楼记》,这句话体现了作者______的高尚情操。
5. “山重水复疑无路,柳暗花明又一村”是陆游的《游山西村》中的名句,这句诗表达了作者______的情感。
三、阅读理解(每题5分,共30分)阅读下面的文章,回答问题。
(文章内容略)21. 文章的主旨是什么?22. 作者通过哪些细节来表现主题?23. 文章中提到的“他”是一个怎样的人?24. 作者在文中表达了哪些情感?四、古文阅读(每题5分,共20分)阅读下面的古文,回答问题。
(古文内容略)25. 请解释文中“之”字的用法。
初三考试题目及答案
初三考试题目及答案# 初三考试题目及答案## 一、语文### 1. 填空题请将下列句子中的空缺部分填写完整。
- 春眠不觉晓,处处闻啼鸟。
______,______。
- 独在异乡为异客,每逢佳节倍思亲。
______,______。
### 答案- 春眠不觉晓,处处闻啼鸟。
夜来风雨声,花落知多少。
- 独在异乡为异客,每逢佳节倍思亲。
遥知兄弟登高处,遍插茱萸少一人。
## 二、数学### 2. 解答题已知一个直角三角形的两条直角边长分别为3cm和4cm,求斜边的长度。
### 答案根据勾股定理,直角三角形斜边的长度可以通过以下公式计算:\[ c = \sqrt{a^2 + b^2} \]其中 \( a \) 和 \( b \) 分别是直角边的长度,\( c \) 是斜边的长度。
将 \( a = 3 \) cm 和 \( b = 4 \) cm 代入公式,得到:\[ c = \sqrt{3^2 + 4^2} = \sqrt{9 + 16} = \sqrt{25} = 5 \] cm所以,斜边的长度是5cm。
## 三、英语### 3. 选择题Which of the following is the correct spelling?A. ColourB. ColorC. Both A and B### 答案C. Both A and B## 四、物理### 4. 计算题一个物体从静止开始下落,忽略空气阻力,求物体下落10秒后的位移。
### 答案物体自由下落的位移 \( s \) 可以通过以下公式计算:\[ s = \frac{1}{2} g t^2 \]其中 \( g \) 是重力加速度,约为9.8 m/s²,\( t \) 是时间。
将 \( t = 10 \) s 代入公式,得到:\[ s = \frac{1}{2} \times 9.8 \times 10^2 = 490 \] m所以,物体下落10秒后的位移是490米。
初三语文初三中考试卷题目
一、选择题(每题2分,共20分)1. 下列词语中,字形、字音完全正确的是()A. 蜿蜒(wān yán)谈笑风生(tán xiào fēng shēng)雕梁画栋(diāo liáng huà dòng)B. 惊愕(jīng è)恣意妄为(zì yì wàng wéi)谈笑风生(tán xiào fēngshēng)C. 琳琅满目(lín láng mǎn mù)雕梁画栋(diāo liáng huà dòng)惊愕(jīng è)D. 恣意妄为(zì yì wàng wéi)谈笑风生(tán xiào fēng shēng)琳琅满目(lín láng mǎn mù)2. 下列句子中,成语使用不恰当的是()A. 他的画技日新月异,让人惊叹不已。
B. 她的歌声婉转动人,让人陶醉。
C. 他为了追求梦想,不畏艰辛,勇往直前。
D. 她在比赛中表现出色,独占鳌头。
3. 下列诗句中,表达“时光流逝”的是()A. 春风又绿江南岸,明月何时照我还?B. 夜来风雨声,花落知多少。
C. 人生若只如初见,何事秋风悲画扇。
D. 但愿人长久,千里共婵娟。
4. 下列文学常识表述错误的是()A. 《红楼梦》的作者是曹雪芹。
B. 《水浒传》的作者是施耐庵。
C. 《西游记》的作者是吴承恩。
D. 《三国演义》的作者是罗贯中。
5. 下列句子中,没有语病的是()A. 他不仅成绩优秀,而且积极参加社会实践活动。
B. 我喜欢看书,尤其是历史、文学类的书籍。
C. 这本书虽然厚,但我很快就看完了。
D. 我非常喜欢这部电影,因为它让我感受到了生活的美好。
二、填空题(每空2分,共20分)6. 《孟子》中提到:“______,得道多助;______,失道寡助。
2024-2025学年江苏省句容市、丹阳市初三入学调研英语试题(2)试卷含答案
2024-2025学年江苏省句容市、丹阳市初三入学调研英语试题(2)试卷注意事项:1.答卷前,考生务必将自己的姓名、准考证号、考场号和座位号填写在试题卷和答题卡上。
用2B铅笔将试卷类型(B)填涂在答题卡相应位置上。
将条形码粘贴在答题卡右上角"条形码粘贴处"。
2.作答选择题时,选出每小题答案后,用2B铅笔把答题卡上对应题目选项的答案信息点涂黑;如需改动,用橡皮擦干净后,再选涂其他答案。
答案不能答在试题卷上。
3.非选择题必须用黑色字迹的钢笔或签字笔作答,答案必须写在答题卡各题目指定区域内相应位置上;如需改动,先划掉原来的答案,然后再写上新答案;不准使用铅笔和涂改液。
不按以上要求作答无效。
4.考生必须保证答题卡的整洁。
考试结束后,请将本试卷和答题卡一并交回。
Ⅰ. 单项选择1、Sally picked a basket of strawberries. She took two and left _____ to her mom.A.another B.othersC.the other D.the others2、—Hello, Matt. How’s your life in Canada?—I am used to it now. My host family always try their best to make feel at home.A.me B.I C.my D.mine3、Xishuangbanna which ______ its beautiful scenery makes me really excited.A.is known as B.regards as C.is famous for D.considers as4、Whenever you ____ problems, you should try to get them over by yourself.A.hear of B.show off C.call at D.come across5、Last night, I went to bed late, _______ I am really tired now.A.so B.or C.but6、--- I didn’t know this is a one way street, Sir.--- ___________A.That’s all right.B.I don’t believe you.C.How dare you say that. D.Sorry, but that’s no excuse.7、Mike looked the girl up and down.He wondered ______.A.where does he meet her B.where had he met herC.where he meets her D.where he had met her8、Getting a driver’s license a lot of time, but many people think it’s worth it.A.costs B.pays C.takes D.spends9、This year our school is__________than it was last year.A.much more beautiful B.much beautifulC.the most beautiful D.beautiful10、Hainan is _____ island with fresh air and bright sunshine.A.the B.an C.aⅡ. 完形填空11、It was a cold afternoon in winter. My oldest son, Stephen, was at school, and Reed, my husband, at work. My 1 little ones were sitting around the kitchen table. Tom was perfecting a paper plane, while Sam was 2 on an oil painting.But Laura, our only daughter, sat quietly and was 3 in her project. Every once in a while she would ask how to 4the name of someone in our family, then carefully form the letters one by one. Next, she would add flowers with small items. She finished off each with a sun in the upper right hand corner. Holding them at eye level, she let out a long sigh (叹息) of5 .“What are you doing, Honey?” I asked. She looked quickly at her brother before looking back at me. “It’s a 6 .” she said, covering up her work with her hands.Next, she put her work into a box. When she had finished, she disappeared up the stairs.It wasn’t until later that evening that I7 a “mailbox” taped onto the doors to each of our bedrooms. There were little notes saying that she loved all of us. She hadn’t8 Sam or baby Paul. They are pages of colored scenes including flowers with happy faces. “He can’t read yet,” she whispered (低声说), “9 he can look at the pictures.” Each time I received one of my little girl’s gifts, it10 my heart. I was touched at how carefully she paid attention to what wrong happened to us. When Stephen lost a baseball game, there was a letter telling him she thought he was the best ballplayer in the whole world. After I had a 11 day, there was a message thanking me for my efforts.This same little girl is grown now, driving off every day to the state college, but some things about her have 12 changed. Yesterday I found a love note next to my bedside. “Thanks for always being there for me, Mom,” it read, “I’m glad that we’re the best friends.”There are angels among us. I know I live with one.1.A.two B.three C.four D.five2.A.working B.getting C.holding D.putting3.A.absent B.lost C.bored D.upset4.A.complete B.afford C.spell D.check5.A.satisfaction B.carefulness C.tiredness D.regret6.A.goal B.dream C.wish D.surprise7.A.realized B.noticed C.knew D.predicted8.A.cared B.remembered C.followed D.forgotten9.A.but B.and C.because D.so10.A.deepened B.froze C.broke D.brightened11.A.boring B.different C.hard D.crazy12.A.never B.already C.ever D.EvenⅢ. 语法填空12、Making friends is a skill. Like most skills, you can improve it 1.you are patient. If you want to meet people and make friends, you must be 2.(will) to take action. You must first go where there are people. You won't make friends staying home alone.Joining a club or a group, talking to those who like the same things as you do is much3.(easy). Or join someone in some activities.Many people are4.when talking to new people. After all, meeting strangers means seeing the unknown. And it's human nature to feel a bit5.(pleasant) about the unknown. Most of fears about 6.(deal) with new people come from doubts (怀疑) about ourselves. We imagine other people are judging us—finding us too tall or too short, too this or too that. But don't forget that they must be feeling the s7.way. Try to accept yourself as you are, and try to make others feel at home. You'll all feel 8.(comfortable).Try to be brave even if you don't feel that way when you enter a room full of strangers. Walk tall and straight, look directly at other people and smile.If you see someone you'd like to speak to, say something. Don't wait for the other person to start a talk.Just meeting someone new9.(do) mean that you'll make friends with that person. Friendship is based on mutual (相互的) likings and "give and take".10.takes time and effort (精力)for us to develop friendship. And there are things that stop a new friendship from growing.Ⅳ. 阅读理解A13、Life without chocolate is like a beach without water.You might be a chocolate lover but considering your health,you might be avoiding it now and then.But now you don't need to fear it anymore because we have found some ways to solve the problem.Chocolates are popular sweets all over the world but you might have seen mummies scolding kids for eating them and people giving long lectures on the disadvantages of chocolates.Chocolates with loads of milk and butter are quite unhealthy for us.They taste really good but the results are really bad.But remember where there is a will,there is a way.If you are a chocolate lover, do try dark chocolate which contains(含有)little sugar in it and is bitter in taste.There're also many other ways to make your favourite chocolate healthy and tasty.In fact,the bad thing about chocolate is that our body doesn't recognize(识别)it as a food but only a source of sweet in the body.But to make your body recognize chocolate as a food,you have to take chocolate by combining(结合)it with fruits and vegetables that are rich in vitamin C,such as blue—berries and strawberries,then it will give you full nutrients(营养)packageto use all tile iron free from chocolate.This combination will also satisfy your need.At the same time,you will be having a treat,a full healthy treat that you can have without any worry.So,remember if you're the one who can't stop yourself from having chocolate in sight,you must go for these,which not only bring you more taste but more healthiness.1.The bad thing about chocolate is that .A.it contains much sugar B.it makes kids' skin darkC.it contains vitamin D.it reduces nutrients package2.According to the passage,it's a healthy way to eat chocolate with .A.butter and sweets B.milk and blue—berriesC.fruits and vegetables D.sugar and strawberries3.This passage is most probably taken from part of a magazine.A.art&Nature B.Life&TravelC.Sport&Hobby D.Food&HealthB14、The dodo was a ground nesting(筑巢), flightless bird. An adult dodo could grow to a height of about a meter and weigh between 45-50 pounds. The natural habitat of this kind of bird lay in the forest of Mauritius.Seed(种子) and fruits that were found in the forest were the main food of the dodo birds. As they could easily get the food they required in the forest, they di dn’t need to fly. As time went by, they finally lost the ability to fly. It turned out to be a major disadvantage for dodos, as they were left with no ability to protect themselves against human beings’ attacks in their natura l habitat, which drove this kind of bird to extinction(灭绝).The extinction of the dodo started in 1505, when Portuguese sailors set their foot on the Island of Mauritius. Before this, the dodo didn’t face any danger. People began to hunt them. It was not long before animals, like cats, pigs and monkeys, were also introduced to the island by humans. When ships arrived, the rats on these ships came onto the land. Though these animals were not able to attack huge dodos, it was easy for them to attack dodos’ nests on the ground. These anima ls continued to feed on dodo eggs.The dodo became a relatively(相对地) rare bird in Mauritius at the beginning of the 17th century, and became extinct in the end. The last reported sighting of a dodo was in 1681.1.Why did the dodo lose its ability to fly?A.Because it liked walking on the ground.B.Because it had no enemies in the forest.C.Because it was too big to fly.D.Because it didn’t need to fly to look for food.2.What can we learn from the last two paragraphs?A.Humans hunted for dodos for money .B.Dodos’ nesting places were attacked by human beings.C.The dodo became extinct because of human activity.D.Other animals on the island lived mainly on dodos’ meat.3.What does the passage mainly talk about?A.The extinction of the dodo.B.The appearance of the dodo.C.The actions taken to protect the dodo.D.The punishment for hunting the dodoC15、Have you ever run into a careless mobile phone user on the street? Perhaps they were busy talking, texting or checking updates on WeChat without looking at what was going on around them. As the n umber of this new “species(物种)” of human has kept rising, they have been given a new name˗˗˗˗phubbers.Recently, a cartoon created by students from China Central Academy of Fine Arts put this group of people under thespotlight(聚光灯). In the short film, phubbers with different social identities always put themselves in their phones. A doctor plays with his mobile phone while letting his patient die, a pretty woman takes selfie(自拍照) in front of a car accident site(场地), and a father loses his child without knowing about it while using his mobile phone. A chain of similar events finally leads to the destruction(毁灭) of the world.Although the ending sounds overstated(夸张), the damage(损害)that phubbing can bring is real.Your health is the first to bear(承受) the effect and result of it. “Constantly(不断地) bending(使弯曲) your head to check your telephone could damage your neck,” Guangming Daily quoted(引述) doctors as saying, “the neck is like a rope that breaks after long-term stretching(伸展).” Also, staring(盯着) at telephones for long periods of time will damage your eyesight gradually, according to the report.But that’s not all. Being a phubber could also damage your social skills and drive you away from your friends and family. At reunions(团聚)with family or friends, many people tend to stare at their telephones while others are chatting happily with each other and this creates a strange atmosphere, Qilu Evening News reported.It can also cost you your life. There have been lots of reports on phubbers who fell to their death, suffered accidents, and were robbed of their telephones in broad daylight.1.What does the underlined word phubbers mean in Chinese? _________.A.低头族B.打工族C.月光族D.啃老族2.For what purpose does the author(作者) give the example of a cartoon in Para.2? _____.A.To warn doctors against using telephones while treating patientsB.To show the world will finally be destroyed by phubbersC.To advertise the cartoon made by studentsD.To tell people the bad influence of phubbing3.Which of the following is NOT a risk a phubber may have? _________.A.He might get divided from his friends and familyB.His neck and eyesight will be gradually harmedC.He will cause the destruction of the worldD.His social skills could be influenced4.Which of the following may be the author’s attitude(态度) towards phubbing? _________.A.Supportive B.Against C.Active D.Favorable5.What may the passage talk about next? _________.A.Advice on how to use a telephone B.Ways to reduce(减少) the risks of phubbingC.Results of phubbing D.People are crazy about phubbingD16、It is easier to find songs for adults than for kids. The market in children’s music is growing, however. Babies learn about music from the simple songs that their parents sing to them. When the children are older, their parents might teach them songs as part of a game. BB King’s recording of Rainy Day Blues follows this tradition. Most of BB King’s fans, however, may not know about his recordings for children. They only know that he writes very popular blues(布鲁斯乐曲) songs for adults.BB King, a great blues musician, recorded Rainy Day Blues for a company called Music for Little People.The company began when a man named Leib Ostrow was looking for songs for his children. He looked for them in stores and looked through books. He could not find anything that he really liked, so he decided to begin a recording company of his own. Soon he was recording music for children. Many parents thought it was a great idea. So did many recording artists.Music for Little People islocatedin northern California. It started as a mail-order business in 1985.Today it is one of the largest children’s musical and educational companies in the United States.根据材料内容选择最佳答案,将其标号填入题前括号内。
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1.如图,四边形ABCD中,∠BAD=120°,∠B=∠D=90°,在BC、CD上分别找一点M、N,使△AMN周长最小时,则∠AMN+∠ANM的度数为()
2.二次函数y=ax2+bx+c(a≠0)的图象如图所示,若|ax2+bx+c|=k(k≠0)有两个不相等的实数根,则k的取值范围是()
3.如图,点A在双曲线上,点B在双曲线y=上,且AB∥x轴,C、D在x轴上,若四边
形ABCD为矩形,则它的面积为.
4.如图,AB是⊙O的直径,弦BC=2cm,F是弦BC的中点,∠ABC=60°.若动点E以2cm/s 的速度从A点出发沿着A→B→A方向运动,设运动时间为t(s)(0≤t<3),连接EF,当△BEF 是直角三角形时,t(s)的值为()
5.如图,已知⊙O是以坐标原点O为圆心,1为半径的圆,∠AOB=45°,点P在x轴上运动,若过点P且与OA平行的直线与⊙O有公共点,设P(x,0),则x的取值范围是_____.
6.如图,M为双曲线y=上的一点,过点M作x轴、y轴的垂线,分别交直线y=﹣x+m于点
D、C两点,若直线y=﹣x+m与y轴交于点A,与x轴相交于点B,则AD•BC的值____.7.如图,已知点A(4,0),O为坐标原点,P是线段OA上任意一点(不含端点O,A),过P、O两点的二次函数y1和过P、A两点的二次函数y2的图象开口均向下,它们的顶点分别为B、
8.如图,在Rt△ABC中,∠ABC=90°,BA=BC.点D是AB的中点,连接CD,过点B作BG 丄CD,分别交GD、CA于点E、F,与过点A且垂直于的直线相交于点G,连接DF.给出
以下四个结论:①;②点F是GE的中点;③AF=AB;④S△ABC=5S△BDF,其
中正确的结论序号是.
1.(2012•宁波)如图,在△ABC中,BE是它的角平分线,∠C=90°,D在AB边上,以DB为直径的半圆O经过点E,交BC于点F.
(1)求证:AC是⊙O的切线;
(2)已知sinA=,⊙O的半径为4,求图中阴影部分的面积.
2.(2012•温州)温州享有“中国笔都”之称,其产品畅销全球,某制笔企业欲将n件产品运往A,B,C三地销售,要求运往C地的件数是运往A地件数的2倍,各地的运费如图所示.设安排x 件产品运往A地.
(1)当n=200时,①根据信息填表:
②若运往B地的件数不多于运往C地的件数,总运费不超过4000元,则有哪几种运输方案?(2)若总运费为5800元,求n的最小值.
3.(2012•贵港)如图,Rt△ABC的内切圆⊙O与AB、BC、CA分别相切于点D、E、F,且∠ACB=90°,AB=5,BC=3,点P在射线AC上运动,过点P作PH⊥AB,垂足为H.
(1)直接写出线段AC、AD及⊙O半径的长;
(2)设PH=x,PC=y,求y关于x的函数关系式;
(3)当PH与⊙O相切时,求相应的y值.
4.(2012•丽水)在直角坐标系中,点A是抛物线y=x2在第二象限上的点,连接OA,过点O 作OB⊥OA,交抛物线于点B,以OA、OB为边构造矩形AOBC.
(1)如图1,当点A的横坐标为_________时,矩形AOBC是正方形;
(2)如图2,当点A的横坐标为时,
①求点B的坐标;
②将抛物线y=x2作关于x轴的轴对称变换得到抛物线y=﹣x2,试判断抛物线y=﹣x2经过平移交换后,能否经过A,B,C三点?如果可以,说出变换的过程;如果不可以,请说明理由.
5.(2012•兰州)如图,Rt△ABO的两直角边OA、OB分别在x轴的负半轴和y轴的正半轴上,O为坐标原点,A、B两点的坐标分别为(﹣3,0)、(0,4),抛物线y=x2+bx+c经过点B,且顶点在直线x=上.
(1)求抛物线对应的函数关系式;
(2)若把△ABO沿x轴向右平移得到△DCE,点A、B、O的对应点分别是D、C、E,当四边形ABCD是菱形时,试判断点C和点D是否在该抛物线上,并说明理由;
(3)在(2)的条件下,连接BD,已知对称轴上存在一点P使得△PBD的周长最小,求出P点的坐标;
(4)在(2)、(3)的条件下,若点M是线段OB上的一个动点(点M与点O、B不重合),过点M作∥BD交x轴于点N,连接PM、PN,设OM的长为t,△PMN的面积为S,求S和t的函数关系式,并写出自变量t的取值范围,S是否存在最大值?若存在,求出最大值和此时M点的坐标;若不存在,说明理由.。