03练习一(2)
03 力学:第二章 运动和力-课堂练习及部分习题解答
α α
N
沿斜面方向
mg+ma0
K K K 以地面为参照系,物体加速度 a = a′ + a0
建立如图所示坐标系,据加速度分量关系
( ma0 + mg ) sin α = ma′ a′ = ( a0 + g ) sin α
y K a0 x α K a′
ax = a′ cos α = ( a0 + g ) sin α cos α a y = a0 − ( a0 + g ) sin 2 α = a0 cos 2 α − g sin 2 α
(2) 小球将离开锥面时,支持力N=0,有
0 = mg sin θ − mω 2l sin θ cos θ ⇒ ωc = g l cos θ
练习册·第二章 运动和力·第3题
Zhang Shihui
题. 小球质量为m,在水中受的浮力为常力F。当它从静止 开始沉降时,受到水的粘滞阻力为 f = kv (k为常数)。证 明:小球在水中竖直沉降的速度v与时间t的关系为
2
O
θ
H r
l
r = l sin θ
竖直面内静止 T cos θ + N sin θ − mg = 0
学习指导·第二章 运动和力·习作题9
Zhang Shihui
2
⎧ ⎪ N = mg sin θ − mω l sin θ cos θ (1) 联立可得 ⎨ 2 2 T mg cos θ m ω l sin θ = + ⎪ ⎩
题. 已知一质量为m的质点在x轴上运动,质点只受到指 向原点的引力的作用,引力大小与质点离原点的距离x 的平方成反比,即f =-k/x2,k是比例常数。设质点在 x=A时的速度为零,求质点在x=A /4处的速度的大小.
四年级数学上册教案3:练习一-苏教版
四年级数学上册教案3:练习一-苏教版教学目标1. 让学生通过练习,进一步掌握基本的数学运算方法,提高运算速度和准确性。
2. 培养学生的数学思维能力,使学生能够运用所学的数学知识解决实际问题。
3. 培养学生的合作意识,提高学生的团队协作能力。
教学内容1. 加减乘除的运算2. 混合运算3. 解决实际问题教学方法1. 讲授法2. 练习法3. 小组合作法教学过程1. 复习导入(10分钟)通过复习上一节课的内容,让学生对加减乘除的运算有一个回顾,为新课的学习打下基础。
2. 新课导入(10分钟)通过讲解混合运算的运算顺序,让学生掌握混合运算的方法。
3. 课堂练习(15分钟)让学生独立完成练习题,巩固所学的运算方法。
4. 小组合作(15分钟)让学生分组讨论解决实际问题,培养学生的合作意识。
5. 课堂小结(10分钟)对本节课的学习内容进行总结,让学生对所学的知识有一个全面的掌握。
6. 作业布置(10分钟)布置适量的作业,让学生在课后进行巩固。
教学评价通过课堂练习和课后作业,对学生的学习情况进行评价,对学生的学习成果进行肯定,对学生的学习不足进行指导。
教学反思在教学过程中,要注意观察学生的学习情况,及时调整教学方法,以达到最好的教学效果。
同时,要注重培养学生的数学思维能力,提高学生的数学素养。
以上就是四年级数学上册教案3:练习一的教学设计,希望对大家有所帮助。
需要重点关注的细节是“小组合作”。
小组合作是学生进行知识探究和解决问题的重要方式,也是培养学生合作意识、提高团队协作能力的重要途径。
因此,教师需要在这个环节投入更多的时间和精力,以确保学生能够有效地进行小组合作。
小组合作的补充和说明1. 分组原则(5分钟)在进行小组合作之前,教师需要根据学生的学习成绩、性格特点、性别等因素进行合理分组,确保每个小组的实力相当,有利于小组之间的公平竞争。
同时,每个小组的人数不宜过多,一般以4-6人为宜,以确保每个学生都能充分参与讨论。
苏教版三年级数学下册第一单元03三位数除以一位数商是两位数(练习一)
3、要使□24÷4的商是两位数, 、要使□ ÷ 的商是两位数 的商是两位数, 里可以填( □里可以填( ),最大可 最大可 以填( ) 以填 4、要使□ 45÷4的商是三位数, 、要使□ ÷ 的商是三位数 的商是三位数, 里可以填( □里可以填( ), 最小可以 ). 填(
1、用竖式计算并验算
比较上下两题, 比较上下两题,你有什么 发现? 发现?
5、小明从家出发,经过邮局到少年 宫,一共用了9分。
邮局
小明家
?m
少年宫
(1)小明平均每分走多少米? (2)如果照这样的速度直接从家到少年宫,只 要7分。小明直接从家去少年宫的路程是多少 米?
教学后记: 教学后记: 学生能独立思考,运用已有的知识,方法, 经验解决实际问题。学生在计算知识的学 习中得到多方面的发展。
苏教版三年级数学下册
教学目的 1 鼓励学生独立思考,让学生运用已有的知识, 方法,经验解决实际问题。促使学生在计算知 识的学习中得到多方面的发展。 2 2将计算教学和解决问题融合在一起,更加有 利于学生感受数学的价值,增强应用数学的意 识和解决问题的能力。 重难点 运用知识解决实际的数学问题
填空: 填空: 1、684÷6的商的最高位在( 的商的最高位在( 、 ÷ 的商的最高位在 )位 商是( )位数 位数. 上,商是 位数 488÷8 的商是( 位数。 ÷ 的商是( )位数。 2、从425里连续减去 ,减( 、 里连续减去5, 里连续减去 后得0。 后得 。 )次
585 ÷5= 658 ÷4=
2、先估计商是几百多还是几十多, 再计算。
228÷3 944÷ 8
712÷ 6 543÷2
231÷5 197 ÷4
分钟跑390米 我2分钟跑 米 分钟跑
大学物理习题答案03刚体运动学
⼤学物理习题答案03刚体运动学⼤学物理练习题三⼀、选择题1.⼀⼒学系统由两个质点组成,它们之间只有引⼒作⽤。
若两质点所受外⼒的⽮量和为零,则此系统(A) 动量、机械能以及对⼀轴的⾓动量都守恒。
(B) 动量、机械能守恒,但⾓动量是否守恒不能断定。
(C) 动量守恒,但机械能和⾓动量守恒与否不能断定。
(D) 动量和⾓动量守恒,但机械能是否守恒不能断定。
[ C ]解:系统=0合外F,内⼒是引⼒(保守内⼒)。
(1)021 F F,=0合外F ,动量守恒。
(2)2211r F r F A =合。
21F F,但21r r时0A 外,因此E不⼀定守恒。
(3)21F F,2211d F d F M =合。
两⼒对定点的⼒臂21d d 时,0 合外M,故L 不⼀定守恒。
2. 如图所⽰,有⼀个⼩物体,置于⼀个光滑的⽔平桌⾯上,有⼀绳其⼀端连结此物体,另⼀端穿过桌⾯中⼼的⼩孔,该物体原以⾓速度ω在距孔为R 的圆周上转动,今将绳从⼩孔往下拉。
则物体 (A) 动能不变,动量改变。
(B) 动量不变,动能改变。
(C) ⾓动量不变,动量不变。
(D) ⾓动量改变,动量改变。
(E)⾓动量不变,动能、动量都改变。
[ E ]解:合外⼒(拉⼒)对圆⼼的⼒矩为零,⾓动量O Rrmv L 守恒。
r 减⼩,v 增⼤。
因此p 、E k 均变化(m不变)。
3. 有两个半径相同,质量相等的细圆环A 和B 。
A 环的质量分布均匀,B 环的质量分布不均匀。
它们对通过环⼼并与环⾯垂直的轴的转动惯量分别为J A 和J B ,则(A)A J >B J (B) A J < B J(C) A J =B J (D) 不能确定A J 、B J 哪个⼤。
[ C ]解:2222mR dm R dm R dm r J, J 与m 的分布⽆关。
另问:如果是椭圆环,J 与质量分布有关吗?(是)4. 光滑的⽔平桌⾯上,有⼀长为2L 、质量为m 的匀质细杆,可绕过其中点且垂直于杆的竖直光滑固定轴O ⾃由转动,其转动惯量为31mL 2,起初杆静⽌。
发展心理学自考练习03答案
1_d__认为儿童是“高尚的野蛮人”,因为他们有许多与生俱来的高尚的观念和品性。
CA霍尔B格塞尔C卢梭D洛克2__a_强调人格结构中理性自我的调节作用,他认为,通过这种调节作用,个体可以解决发展中的各种危机,从而形成健康的人格。
AA埃里克森B弗洛伊德C霍尔D班杜拉3由于前幼儿期儿童心理发展水平较低,所以他们的游戏主要为BA主题游戏B模仿性游戏C规则游戏D表演游戏4只有当___时,真正的第二信号系统的活动才开始产生。
DA直接刺激引起直接反应B直接刺激引起词的反应C词的刺激引起直接反应D词的刺激引起词的反应5___认为,游戏是儿童释放焦虑和补偿生活中所遇到的挫折的手段。
DA皮亚杰B格罗斯D弗洛伊德6童年期儿童的主导活动是___活动。
CA生活B游戏C学习D社交7___认为,自我中心言语是外部言语向内部言语过渡的中间形式。
BA皮亚杰B维果斯基C乔姆斯基D班杜拉8皮亚杰认为,具体运算阶段的儿童将道德看成是人们通过协商所达成的共识。
他将这种DA前习俗道德B后习俗道德C他律道德D自律道德1619___的髓骨肖化最晚,一般要到12岁左右才完成。
AA额叶B顶叶C枕叶D颞叶10在整个成年期中,___成逐渐下降的趋势。
AA流体智力C一般智力D特殊智力二、多项选择题11具体运算阶段儿童思维的特点是ABA形成了守恒概念B获得了观点采择能力C能够进行假设性逻辑推理D能够进行辩证逻辑思维E能够进行系统性的逻辑推理12研究心理发展的影响因素的策略有BCD A序列研究B双生子研究C跨文化研究E纵向研究13婴儿的气质类型包括ABCDA轻松型B慢热型C混合型D困难型E中间型14影响儿童语言发展的因素主要有ABCDE A发音器官的成熟B语言中枢的成熟C适当的语言环境D语言感受器的成熟E儿童对成人语言的模仿15弗洛伊德认为,人格结构的成分包括ABDA超我B自我C里必多D本我E无意识三、填空题16作为欧美老年心理学研究的先驱,霍尔于1922年出版了《老年期_》一书。
人教版三年级数学上册第一单元第3课时《练习一》课后练习题(附答案)
人教版三年级数学上册第一单元
第3课时《练习一》课后练习题(附答案)
1.下面是阳阳下午放学回家后时间安排情况。
(1)爸爸5:15下班,从单位走回家需要45分钟,他在吃晚饭前()分钟到家。
(2)阳阳家吃晚饭用了25分钟,他们是()时()分吃完晚饭的。
(3)读书时,爸爸和妈妈陪阳阳一起阅读了40分钟,请你在下面的时间轴上用“↓”表示出他们开始阅读的时刻。
2.某旅游景点循环巴士运营时间如下表,每隔30分钟发一次车。
该巴士一天一共发了多少次车?
参考答案
1.(1)5 (2)6 30 (3)
2.(11:20-9:00)÷30分=5(次)(4:20-2:00)÷30分=5(次)5+5=10(次)
答:该巴士一天一共发了10次车。
专题03 单句改错之谓语动词专项练习-2021年高考英语语法单句改错精选专题训练(2)
单句改错之谓语动词专项练习(2)【高考考点分析】短文改错对谓语动词的考查主要集中在:(1)动词时态与语态的错用(2)主谓一致错误(3)动词固定搭配错误(4)be动词的误加或漏用(5)情态动词后动词的形式错误(6)虚拟语气中动词的形式错误等。
st month, our class climbed Mount Tai, which was more than 1,500 meters above sea level.答案:was →is解析:此处which指代的是先行词Mount Tai,在从句中作主语,从句讲述的是泰山,是客观事实,应用一般现在时,故将was改为is.【知识拓展】学生易受到时间状语Last month和谓语动词climbed的影响,而认为定语从句的时态应与主句时态保持一致。
此题的关键是弄清楚定语从句所修饰的成分和所阐述的内容。
st Friday, the English class was going on when our English teacher suddenly slip and fell off the stage, which shocked all the students.答案:slip →slipped解析:and 连接两个并列成分,前后两个动词词形应一致;由时间状语Last Friday 可知,本句讲述的是过去的事情,故将slip改为slipped.3.Three years ago I decide to get serious about school and made a few changes.答案:decide →decided解析:and连接两个并列成分,前后动词词形应一致,由时间状语Three years ago可知,本句讲述过去的事情,应用一般过去时,故将decide 改为decided.4.I like being with him because he often make me happy.答案:make →makes解析:本句为一般现在时,从句的主语为he,谓语动词应用第三人称单数。
(整理)第03章病理练习题
第03章-局部血液循环障碍局部血液循环障碍一、单选题:1.来自体静脉系统的栓子其运行途径是:A、静脉—右心—肺静脉—肺B、静脉—右心—肺动脉—肺C、静脉—左心—主动脉—机体某器官D、静脉—左心—肺动脉—肺2.因供血中断又未能及时建立侧支循环,局部组织的死亡称为:A、凝固性坏死B、液化性坏死C、坏疽D、梗死E、栓塞3.在组织中有大量血液积聚和凝固并被肉芽组织替代的过程是称:A、血栓机化B、血栓再通C、血肿机化D、坏死机化E、瘢痕形成4.脂肪栓塞是:A、血管内出现脂肪滴并阻塞血管的过程B、血液中的脂蛋白阻塞血管的过程C、进入血循环中的脂肪细胞阻塞血管的过程D、肾小管上皮细胞内出现脂肪滴的过程E、心肌、肝细胞内出现脂肪滴的过程5.循环血液中的凝血块,随血流运行至相应大小血管,引起管腔阻塞的过程称:A、血栓B、血栓的形成C、血栓栓塞D、血栓栓子E、梗死6.左心衰最易引起:A、肺淤血B、肝淤血C、脾淤血D、肾淤血E、下肢坏疽7.休克死亡者其组织切片最常见:A、白色血栓B、红色血栓C、透明血栓D、混合血栓E、附壁血栓8.出血性梗死时最常见的部位是:A、肾B、肺C、脾D、心E、脑9.混合血栓最常发生的部位是:A、左心室B、心瓣膜C、主动脉D、毛细血管E、下肢静脉10.循环血液中有异常物质随血流阻塞于相应大小血管的过程称为:A、血栓形成B、栓塞C、梗死D、栓子形成E、栓子运行11.形成出血性梗死的条件除动脉阻塞外,还应有:A、吻合支丰富,组织致密B、静脉淤血,组织疏松C、静脉通畅,组织疏松D、双重循环,组织致密E、静脉淤血,组织致密12.肺泡壁毛细血管扩张充血,肺泡腔内有红细胞、水肿液,及吞噬含铁血黄素的巨噬细胞,间质有纤维组织增生,应诊断为:A、肺急性淤血B、肺慢性淤血C、大叶性肺炎充血水肿期D、大叶性肺炎红色肝变期E、大叶性肺炎灰色肝变期13.在血管中有血液聚集和凝固,又被肉芽组织代替的过程称为:A、血栓机化B、血栓机化再通C、血肿机化D、坏死机化E、坏死瘢痕形成14.槟榔肝的主要病理变化是:A、肝细胞广泛萎缩B、肝细胞广泛脂变C、肝内广泛淤血、水肿D、肝内淤血、肝细胞脂变及萎缩E、肝细胞广泛脂变及萎缩15.血栓机化是指血栓中有:A、血小板凝集成小梁状B、纤维蛋白及巨噬细胞C、异物巨细胞及纤维细胞D、大量淋巴细胞及纤维母细胞E、新生毛细血管及纤维母细胞16.来自体静脉栓子多栓塞在:A、心B、脑C、肝D、肾E、肺17.血栓与血管壁粘着最牢固的是:A、血栓头B、血栓体C、血栓尾D、附壁血栓E、透明血栓18.在血栓形成过程中,引起血小板粘集最主要的活性物质是:A、ATPB、ADPC、5-HTD、PGE、肾上腺素19.心衰细胞出现于:A、肺栓塞B、肺棕色硬变C、肺梗死D、心肌淤血E、肺出血20.下列哪种栓塞其栓子不是来自左心:A、心肌动脉栓塞B、肾动脉栓塞C、脑动脉栓塞D、肝动脉栓塞E、肺动脉栓塞21.下列血栓引起梗死的过程,正确的顺序是:A、血液凝固—栓塞—血栓形成—梗死B、血栓形成—栓子—栓塞—梗死C、栓子—血栓形成—栓塞—梗死D、血流缓慢—栓塞—栓子—梗死E、栓塞—栓子—血流阻断—梗死22.血栓的哪部分与血凝块的结构相似:A、血栓头B、血栓体C、血栓尾D、微血栓E、混合血栓23.漏出性出血多发生于:A、毛细血管B、小动脉C、大动脉D、小静脉E、大静脉24.脂肪栓塞患者死亡的最常见的原因是:A、急性左心衰竭B、急性右心衰竭C、中毒性休克D、肾功能衰竭E、脑出血25.羊水栓塞的主要病理诊断依据是:A、肺泡内有大量羊水成分B、肺内透明膜形成C、肺小血管和毛细血管内有脂肪滴D、肺小血管和毛细血管内有羊水成分E、肺微循环内有透明血栓26.充血时可能引起的最严重后果是:A、淤血性水肿B、漏出性出血C、血管破裂出血D、实质细胞坏死E、淤血性硬化27.心力衰竭细胞是指:A、心衰时发生变性的心肌细胞B、胞浆内含脂褐素的心肌细胞C、肺泡内吞噬了尘埃的巨噬细胞D、肺泡内吞噬了含铁血黄素的巨噬细胞E、肺泡骨吞噬了病原体的巨噬细胞28.下列哪种因素与血栓形成无关:A、血流缓慢B、心血管内膜损伤C、纤维蛋白溶解酶增加D、血液粘稠度增加E、血流中出现涡流29.下列哪种病变对机体可带来某些有利影响:A、出血B、血栓形成C、淤血D、栓塞E、变性30.脾、肾等器官梗死后的组织变性多属于:A、干性坏疽B、湿性坏疽C、气性坏疽D、凝固性坏死E、液化性坏死31.最易发生贫血性梗死的器官是:A、心、肾、脾B、肺、胃、脾C、小肠、子宫、胃D、肝、胆囊、肺E、膀胱、直肠、阑尾32.心脏附壁血栓常属于:A、白色血栓B、混合血栓C、红色血栓D、血凝块E、透明血栓33.透明血栓常见于:A、心腔内B、大静脉C、中动脉D、主动脉E、毛细血管34.动脉性充血的主要病理变化是:A、组织器官的体积增大B、组织器官重量增加C、局部呈鲜红色D、小动脉和毛细血管扩张,充满红细胞E、局部温度升高35.脑动脉充血时可能引起的最严重后果是:A、颅内压升高B、脑水肿C、头痛头晕D、脑血管破裂出血E、脑脊液增多36.左心衰竭时发生瘀血的脏器是:A、肝B、肺C、肾D、脑E、脾37.门静脉血流回流受阻时,可引起下列哪个脏器瘀血:A、脑B、肝C、肾D、肺E、脾38.心力衰竭细胞是指心力衰竭时出现的:A、含脂褐素的心肌细胞B、尘细胞C、胞浆内含有含铁血黄素的巨噬细胞D、吞噬脂质的巨噬细胞E、红细胞39.槟榔肝是指:A、肝脂肪变性B、肝细胞肿胀C、肝细胞萎缩D、肝慢性瘀血E、肝硬变40.在血栓形成中起重要作用的是:A、中性粒细胞B、红细胞C、单核细胞D、淋巴细胞E、血小板41.血栓形成对机体的影响中,哪一项对机体有利:A、阻塞血管B、瘀血C、止血D、栓塞E、形成心瓣膜病42.二尖瓣狭窄时,在心腔内形成的血栓多为:A、白色血栓B、混合血栓C、微血栓D、红色血栓E、闭塞性血栓43.附贴于心脏房室和血管内膜面,未将管腔完全阻塞的血栓称为:A、透明血栓B、闭塞性血栓C、赘生物D、附壁血栓E、白色血栓44.血栓由肉芽组织取代的过程称为:A、溶解B、吸收C、机化D、再通E、钙化45.弥散性血管内凝血时形成的血栓是:A、红色血栓B、白色血栓C、混合血栓D、赘生物E、微血栓46.纤维蛋白降解产物(FDP)的作用是:A、抗凝作用B、促凝血作用C、缩血管作用D、舒血管作用E、血小板粘集47.股静脉的血栓脱落后,随血流运行阻塞于肺动脉的过程,称为:A、血栓B、血栓形成C、血栓栓塞D、梗死E、瘀血48.栓塞最常见的类型是:A、气体栓塞B、血栓栓塞C、羊水栓塞D、脂肪栓塞E、瘤细胞栓塞49.肺动脉血栓栓塞的栓子主要来自:A、下肢静脉B、门静脉C、上腔静脉D、头颈静脉E、胸壁静脉50.来自门静脉的栓子随血流运行,首先栓塞于:A、脑B、肺C、肝D、肾E、肠51.股骨粉碎性骨折患者可发生:A、脂肪栓塞B、羊水栓塞C、空气栓塞D、血栓栓塞E、寄生虫栓塞52.潜水员从深水中快速升到水面易发生:A、肺不张B、氮气栓塞C、脂肪栓塞D、空气栓塞E、肺水肿53.左心的附壁血栓脱落后常引起:A、肺动脉栓塞B、脑动脉栓塞C、股静脉栓塞D、门静脉栓塞E、肝静脉栓塞54.局部组织因血流阻断而引起的坏死称为:A、栓塞B、血栓形成C、梗死D、机化E、软化55.下列哪种梗死可发生软化并形成囊腔?A、肺梗死B、肠梗死C、脾梗死D、脑梗死E、肾梗死56.引起梗死的最常见原因是:A、血管受压闭塞B、血栓形成C、动脉痉挛D、瘀血E、动脉内膜炎57.贫血性梗死常发生于:A、脾、肾、肠B、肺、肾、脑C、肾、心、脑D、脾、肝、肺E、肠、脑、心58.出血性梗死最常发生在哪一个器官?A、肾B、肺C、脑D、脾E、心59.肠扭转可引起肠壁发生:A、贫血性梗死C、干性坏疽C、气性坏疽D、出血性梗死E、液化性坏死60.心肌梗死灶的肉眼形状常为:A、楔形B、不规则形C、锥体形D、圆形E、三角形61.下列哪项不属于病理性充血?A、炎性出血B、减压后充血C、侧支性充血D、进食后胃肠道充血E、理化因素引起的充血62.下列哪项不属于瘀血的后果?A、瘀血性水肿B、瘀血性出血C、栓塞D、实质细胞萎缩、变性、坏死E、瘀血性硬化63.下列哪项不符合肺瘀血的病理改变?A、肺泡腔内有水肿液B、肺泡壁毛细血管扩张C、肺泡腔内有多量中性粒细胞及纤维蛋白D、肺泡腔内出现心力衰竭细胞E、肺泡腔内出现红细胞64.下旬哪项不符合静脉性充血时受累器官的病变特点?A、体积增大B、颜色鲜红C、代谢功能减弱D、小静脉和毛细血管扩张E、温度降低65.下列哪项不是血栓形成的条件?A、心血管内膜损伤B、血流缓慢C、血流形成涡流D、血液凝固性增加E、纤维蛋白溶解增加66.构成血栓头部的主要成分是:A、红细胞B、血小板C、中性粒细胞D、单核细胞E、纤维蛋白67.下列哪项不属于血栓形成的结局?A、溶解吸收B、排出血管外C、机化D、再通E、钙化68.下列有关血栓的叙述哪项不正确?A、心腔大、血流快、很难形成血栓B、静脉血栓较动脉血栓多见C、下肢静脉血栓较上肢静脉血栓多见D、血栓形成的机理与凝血机理有关E、动脉粥样硬化继发溃疡易形成血栓69.下列哪项不属于心血管内膜损伤引起血栓形成的机制?A、血液浓缩B、释放组织因子C、激活XE因子D、血小板产生血栓素A2E、血小板粘集70.下列哪项不是梗死的原因?A、血栓形成B、血管受压闭塞C、动脉痉挛D、动脉栓塞E、神经损伤71.下列对肺出血性梗死的叙述哪一项是错误的?A、多发生在严重肺瘀血基础上B、由肺动脉分支阻塞引起C、多位于肺下叶、肋隔角处D、梗死灶有弥漫性出血E、由于组织致密,出血量不多72.下列有关脾梗死病理特点的叙述哪一项是错误的?A、多由血栓栓塞所致B、梗死灶呈灰白色,锥体形C、交界处有明显的充血、出血带D、属出血性梗死E、梗死组织呈凝固性坏死&A、白色血栓B、混合血栓C、红色血栓D、透明血栓E、附壁血栓73.血栓头为:74.血栓体为:75.血栓尾为:*&A、白色血栓B、血凝块C、血栓尾D、透明血栓E、血栓栓子76.急性风湿病时心瓣膜上的赘生物为:77.DIC时微循环内形成为:78.易脱落的血栓为:*&A、脂肪栓塞B、氮气栓塞C、羊水栓塞D、纤维素性血栓E、空气栓塞79.股骨粉碎性骨折时可发生:80.减压病时可发生:81.DIC时可发生:*&A、附壁血栓B、细菌栓塞C、羊水栓塞D、阻塞性血栓E、癌细胞栓塞82.分娩时可发生:83.恶性肿瘤可发生:84.心肌梗死部位可发生:*&A、细、小动脉扩张B、小静脉、毛细血管扩张C、大、中型动脉扩张D、细、小动脉管壁玻璃样变E、局部组织器官的血管内血量增多85.动脉性充血的主要表现是:86.静脉性充血的主要表现是:87.充血的概念是:*&A、肺动脉栓塞B、脑动脉栓塞C、门静脉栓塞D、肝动脉栓塞E、肠系膜下动脉栓塞88.股静脉血栓脱落可引起:89.肠系膜下静脉血栓脱落可引起:90.左心腔内血栓脱落可引起:*&A、肺瘀血B、肝瘀血C、炎性充血D、减压后充血E、大、小循环瘀血91.全心衰竭时可引起:92.右心衰竭患者可引起:93.风湿性心脏病二尖瓣狭窄患者可引起:*&A、凝血功能障碍B、出血C、白色血栓D、梗死E、球形的混合血栓94.DIC最常见的临床表现:95.DIC最主要的病理特征是:96.二尖瓣狭窄时在心房内形成的血栓是:97.心瓣膜上的疣状赘生物是:*&A、右心、肺动脉及其分支B、脾动脉C、肝内门静脉分支D、左心E、肾静脉98.风湿性心内膜炎主动脉瓣赘生物脱落可栓塞于:99.做病理实验时,从兔耳缘静脉注入空气,其栓塞主要部位是:*&A、梗死灶灰白色,呈锥体形B、梗死灶呈地图状C、梗死灶紫红色,呈锥体形D、梗死灶发生软化、液化E、梗死灶呈节段状100.脑梗死:101.肺梗死102.心肌梗死103.脾梗死*&A、白色血栓B、混合血栓C、透明血栓D、血栓机化E、红色血栓104.微循环小血管内的微血栓:105.风湿病心瓣膜上的赘生物106.静脉内血栓尾部107.二尖瓣狭窄左心房内球形血栓:*&A、氮气栓塞B、血栓栓塞C、空气栓塞D、脂肪栓塞E、细菌栓塞108.潜水员从深水中快速升到水面,处理不当可引起:109.颈静脉破裂可引起:110.下肢静脉血栓脱落可引起:*&A、瘀血B、梗死C、慢性心瓣膜病D、肺动脉栓塞E、动脉性充血111.静脉血栓形成,侧支循环建立不足可引起:112.股静脉内血栓脱落可引起:113.血栓阻塞动脉,缺乏有效的侧支循环可引起:114.血栓与血管壁粘着最不牢固的是:A、血栓头B、血栓体C、血栓尾D、风湿病瓣膜赘生物E、微血栓*二、多选题:1.梗互与坏死的关系是:A、梗死就是坏死B、梗死是缺血引起的坏死C、坏死包括梗死D、坏死与梗死发病机理一样E、坏死比梗死严重2.血栓形成的转归有:A、脱落形成栓子产生栓塞B、阻塞血管造成梗死或机化再通C、组织出血D、造成阻塞性肺气肿E、转化为结缔组织3.肺淤血的主要病理变化有:A、肺泡腔内大量淋巴细胞B、肺泡腔内有大量纤维素C、肺泡腔内有水肿液和红细胞D、肺泡腔内有大量中性白细胞E、肺泡壁毛细血管扩张充血4.可引起破裂性出血的疾病有:A、窒息B、肺结核C、胃溃疡D、维生素缺乏症E、血小板减少性紫癫5.左心室附壁血栓脱落可引起:A、肺栓塞B、脑栓塞C、脾栓塞D、阻塞心室血流E、诱发心壁穿孔6.下列哪些属于生理性充血:A、妊娠的子宫B、肺淤血C、饱餐后的胃肠道充血D、炎症性充血E、减压后充血7.关于动脉性充血的叙述,正确的有:A、由动脉流入组织或器官的血量增多B、常对机体有利C、局部器官体积增大,颜色暗红D、致器官功能降低E、多属于病理性充血8.动脉性充血的后果是:A、可使局部代谢增高,功能加强B、多见于病理状态下C、对机体有利无害D、多为暂时性的,病因去除后即恢复E、使器官功能降低9.局部静脉性充血的特点有:A、器官体积增大,颜色暗红B、小动脉和毛细血管扩张充血C、器官代谢旺盛,温度升高D、器官代谢降低,功能低下E、多见于生理状态下10.慢性肺淤血可致:A、肺泡内大量中性粒细胞渗出B、肺肉质变C、肺褐色硬变D、肺泡上皮细胞增生E、肺间质纤维组织增生11.有关槟榔肝的叙述,正确的有:A、切面布满岛屿状结节B、切面呈红黄相同的花纹状C、由磷中毒引起D、由亚急性重症肝炎引起E、由慢性肝淤血引起12.与风湿性心内膜炎心瓣膜上疣状赘生物形成有关的因素是:A、心肌供血不足B、血流缓慢C、在心瓣膜闭锁缘有血栓形成D、心瓣膜内皮细胞肿胀、变性、脱落E、细菌直接感染13.血栓形成的过程包括:A、血管破裂B、出血C、白细胞游出D、血小板粘附聚积E、血液凝固14.左心房内形成血栓的因素是:A、久病卧床B、严重创伤C、二尖瓣狭窄D、心绞痛E、左心房淤血或出现涡流15.微血栓发生于:A、微循环毛细血管内B、大静脉内C、粥样斑块表面D、DIC时E、高血压病人16.发生什么变化的血栓不易脱落:A、静脉石B、血栓伴发感染C、血栓被机化D、部分血栓被溶解E、血栓软化17.易引起空气栓塞的原因有:A、锁骨下静脉插管B、长骨骨折C、颈部外伤和手术D、大隐静脉切开输液E、支气管镜检查18.下肢有静脉血栓形成者,活动后可致:A、血栓脱落B、脑梗死C、肝梗死D、脂肪栓塞E、肺栓塞19.肺动脉阻塞后,下列哪些情况下易发生肺出血性梗死:A、肺心病B、右心衰竭C、二尖瓣狭窄D、左心衰竭E、肺炎20.出血性梗死的形成条件有:A、动脉阻塞B、组织致密C、组织血供丰富或有双重血液循环D、组织疏松E、组织严重淤血21.长期静脉性淤血的后果:A、淤血性水肿B、淤血性出血C、间质纤维组织增生D、实质细胞萎缩、变性坏死E、小静脉及毛细血管扩张充血22.血栓的结局有:A、软化、溶解、吸收B、机化C、再通D、钙化E、包囊23.血栓对机体的影响有:A、血管破裂处可止血B、炎症灶脉管内的血栓可防止细菌的扩散C、可阻塞血管造成栓塞D、可脱落造成栓塞E、心瓣膜上的血栓可造成瓣膜变形24.肺淤血的病理变化有:A、肺泡壁毛细血管扩张B、肺泡内有大量中性白细胞和纤维素渗出C、肺泡内有血浆液体D、肺泡内常见,心力衰竭细胞E、肺泡内常见红细胞25.在血栓形成的过程中可见到:A、静脉血栓多于动脉血栓B、下肢血栓多于上肢血栓C、心瓣膜上多为白色血栓D、静脉内为红色血栓E、微血管内为纤维素性血栓26.血栓形成的原因有:A、纤维蛋白溶酶增加B、心血管内膜的损伤C、血流缓慢与不规则D、血小板增多、粘性增大E、癌细胞释放出凝血因子27.股静脉血栓形成后可发生:A、阻塞血流B、脱落形成栓子C、机化D、钙化E、血流完全恢复28.梗死的原因和条件为:A、梗死多由动脉阻塞引起B、动脉持续痉挛可引起梗死的形成C、全身血液循环状态对梗死的形成无影响D、双重血液循环的器官不易发生梗死E、有效的侧支循环建立可防止梗死的发生29.下述哪些是慢性肝淤血的病理变化:A、中央静脉内有微血栓形成B、肝窦扩张淤血C、中央静脉扩张淤血D、小叶周边肝细胞脂肪变性E、中央静脉周围肝细胞萎缩30.能引起肺淤血的疾病有:A、心肌梗死B、肺源性心脏病C、高血压性心脏病D、风湿性心脏病二尖瓣狭窄E、肺动脉栓塞31.静脉性充血是由于:A、静脉受压B、静脉阻塞C、静脉内压力增高D、静脉壁通透性增高E、心力衰竭32.动脉性充血的后果有:A、原因消除后可恢复正常B、多属于暂时性变化C、引起器官功能低下D、少数情况可引起血管破裂E、多对机体不利33.心血管内膜损伤易发生血栓的机制为:A、激活内源性凝血系统B、内皮下胶原暴露激活因子XEC、血小板易于粘集D、释放血小板固子激活凝血过程E、来活ADP34.淤血对机体的影响取决于:A、淤血的范围B、淤血发生的速度C、淤血的程度C、淤血的部位E、淤血持续的时间35.以下可成为栓子的有:A、脂肪滴B、气体C、肿瘤细胞团D、寄生虫虫卵E、羊水36.白色血栓的特点有:A、主要成分是红细胞和纤维素B、多在心血管内膜损伤处形成C、是静脉内延续性血栓的起始部D、易脱落形成栓子E、常见于心脏瓣膜及动脉内膜37.空气栓子进入血循环的原因有:A、输血输液不当B、下股骨粉碎性骨折C、胸部大静脉损伤D、颈静脉损伤E、潜水员由海底迅速上升至水面38.下列哪些情况容易引起血栓形成:A、严重烧伤B、长期卧床C、产后大出血D、动脉瘤形成E、静脉内膜炎三、名词解释:1.充血2.淤血3.肺褐色硬化4.槟榔肝5.血栓形成6.血栓7.透明血栓8.栓塞9.梗死10.心力衰竭细胞11.血栓栓塞12.再通四、填空题:1.血栓的类型有:①______②______③______④______。
五年级数学苏教版上册第2单元复习《单元测试》03 练习测试卷 含答案解析
苏教五年级上单元测试第2单元班级________姓名________一、选择题1.如果正方形的一条对角线是8厘米,它的面积是()平方厘米。
A.64B.32C.16D.82.下图是在平行线间的三个图形,比较它们的面积()。
A.三角形大B.梯形大C.平行四边形大D.一样大3.如图,求平行四边形的面积,算式正确的是()。
A.9×12B.12×15C.7.2×94.把平行四边形通过剪、拼,转化成长方形后,()。
A.面积不变,周长不变B.面积不变,周长变了C.面积变了,周长不变D.面积变了,周长变了5.一个平行四边形的周长是28厘米,它的一条边长6厘米,这条边上的高是4厘米,另一条边上的高是()。
A.5厘米B.4厘米C.3厘米D.2厘米6.一个梯形的上底、下底和高分别扩大3倍,它的面积扩大()倍。
A.3B.6C.9D.127.一个梯形下底是上底的3倍,如果把上底延长10厘米,就得到一个平行四边形,且面积增加40平方厘米,这个梯形的面积是()平方厘米。
A.20B.40C.60D.808.把一个梯形的上底缩短b厘米(上底长>b厘米),下底延长b厘米,高不变,新的梯形与原来的梯形相比,面积()。
A.变小B.变大C.不变D.无法确定9.下列说法正确的有()个。
①面积是1公顷的土地,形状只能是边长为100米的正方形。
②一个平行四边形可以剪成两个完全相同的梯形。
③周长相等的长方形和平行四边形,长方形的面积一定大于平行四边形的面积。
④0既不是负数也不是正数。
A.1B.2C.3D.410.在图中,平行四边形的面积是阴影部分面积的()。
A.2B.4C.6D.8二、图形计算11.下图中A、B是长方形长和宽上的中点,请计算阴影部分的面积。
(单位:厘米)三、填空题12.有一个梯形的面积是48平方分米,上、下底的平均长度是24分米,这个梯形的高是(________)分米。
13.一个平行四边形两条边的长度分别是20厘米和10厘米,其中一条高是12厘米,这个平行四边形的面积是(________)平方厘米。
SIYB 练习03——一个不成功的企业业主的行为
练习3——一个不成功的企业业主的行为一、王大海有错,分析如下:
(1)王大海开的是一家小饮食店。
小店的投资人同时也是店经理,他应当负起经营管理的重任。
错在他整天东游西逛不务正业。
(2)王大海即使自己不经营管理,也应当雇请一个经理来管理小店,只以投资人身份谋求利益。
但他却在名义上当老板而放任自流,甚
至薄待员工,以致员工不愿为他作出贡献。
(3)一家企业最需看重的公众是:顾客、内部员工与供应商。
王大海对他们一概漠视。
他的企业必然“不久就倒闭了”。
(4)从王大海的行为来看,他可能是一个不负责任的人,不负责任的人是干不好事情的!!
二、教训至少可以从王大海的错误上得来,他的几个错误固然一个都不
能犯之外,更重要的是考察一下王大海本人离职后立即从商存在的隐患。
(1)王从国家机关离职,就有一笔开店资金,但他未必具备餐饮行业的有关知识与经验。
(2)嗜好喝酒、打麻将的人一般看来缺乏敬业精神,缺乏责任感。
不学习、不刻苦的人不能当老板。
(3)手里有点钱而不事生产,前景堪忧。
(4)无论从事什么类型的企业,信誉是第一位的,这个“信誉”是对你的顾客、你的员工、你的供应商等与你的企业有联系的人或企业
的一种“承诺”!!!。
【新教材】部编版语文四年级下册03天窗精品练习题2
部编版语文四年级下册03天窗精品练习题23天窗1乡下的房子只有前面一排木板窗。
暖和的晴天,木板窗扇扇开直,光线和空气都有了。
2碰着大风大雨,或者北风呼呼地叫的冬天,木板窗只好关起来,屋子里就黑得地洞里似的。
3于是乡下人在屋面开一个小方洞,装一块玻璃,叫做天窗。
4夏天阵雨来了时,孩子们顶喜欢在雨里跑跳,仰着脸看闪电,然而大人们偏就不许,“到屋里来呀!”孩子们跟着木板窗的关闭也就被关在地洞似的屋里了;这时候,小小的天窗是惟一的慰藉。
5从那小小玻璃,你会看见雨脚在那里卜落卜落跳,你会看见带子似的闪电一瞥(piē);你想像到这雨,这风,这雷,这电,怎样猛烈地扫荡了这世界,你想像它们的威力比你在露天真实感到的要大这么十倍百倍。
小小的天窗会使你的想像锐利起来!6晚上,当你被逼着上床去“休息”的时候,也许你还忘不了月光下的草地河滩,你偷偷地从帐子里伸出头来,你仰起了脸,这时候,小小的天窗又是你惟一的慰藉!7你会从那小玻璃上面的一粒星,一朵云,想像到无数闪闪烁烁可爱的星,无数像山似的,马似的,巨人似的,奇幻的云彩;你会从那小玻璃上面掠过的一条黑影想像到这也许是灰色的蝙蝠,也许是会唱的夜莺,也许是恶霸似的猫头鹰,——总之,美丽的神奇的夜的世界的一切,立刻会在你的想像中展开。
8啊唷唷!这小小一方的空白是神奇的!它会使你看见了若不是有了它你就想不起来的宇宙的秘密;它会使你想到了若不是有了它你就永远不会联想到的种种事件!9发明这“天窗”的大人们,是应得感谢的。
因为活泼会想的孩子们会知道怎样从“无”中看出“有”,从“虚”中看出“实”,比任凭他看到的更真切,更阔达,更复杂,更确实!本文作者茅盾一)预习练习一、看拼音读准汉字běifēnghūhūwèijièsǎodàng北风呼呼慰藉扫荡wēilìfēngfùshǎnshǎnshuòshuò威力丰富闪闪烁烁zhēnqiè真切二、读词语注释北风呼呼:从北方吹来的风,亦指寒冷的风急骤,气势盛大。
思考题与练习题答案03
3. 物质的物理参数测定技术3.1沸点的测定技术(1) 测量温度计应安装在什么位置上? 能否插入液面下? 为什么?测量温度计应固定在试管中距试样液面约2cm处,不能插入液面以下。
因为沸点是指在一定压力下,气、液相达到平衡时的温度。
(2) 为什么使用有侧面开口的塞子固定试管和测量温度计?因为对密闭系统加热会导致意外事故。
如内压过大易爆。
(3)测定几种物质的沸点时,为什么待浴液降温后再更换被测物质?防止浴温过高,低沸点物质挥发。
(4)实验过程中,升温过快或过慢,对测定结果有什么影响?升温过快会使沸点偏高,过慢偏低。
(5)测得某种液体有固定的沸点,能否认为该液体是单纯物质? 为什么?在一定压力下,纯液体具有固定的沸点,此时蒸气与液体处于平衡状态,组成不变。
但当液体不纯时,则沸点有一个温度稳定范围,称为沸程。
对纯液体物质,其沸程一般为0.5~1℃;若含有杂质时,沸程则加大。
因此沸点是液体物质纯度的重要标志。
准确地测定沸点,对液体混合物的分离、提纯和正确使用,具有重要的指导意义。
但应当注意,当几种物质形成恒沸物时,虽然有固定的沸点,但却不是纯净物。
3.2熔点与凝固点的测定技术(1)为什么通过熔点测定可以检验晶体物质的纯度?(2)测定熔点时,若有下列情况将产生什么结果?①熔点管壁太厚②熔点管底部未完全封闭,尚有一针孔③熔点管不洁净④样品未完全干燥或含有杂质⑤样品研得不细或装得不紧密⑥加热速度过快(3) 如果测得某一未知物的熔点与某已知物的熔点相同,能否确认它们为同一化合物? 为什么?3.3液体密度的测定(1) 测定密度时为什么要用恒温水浴?(2)密度瓶中若有气泡,会使测定结果偏高还是偏低? 为什么?(3) 注满样品的密度瓶若恒温时间过短,对实验结果会产生什么影响?3.4略3.5折射率的测定技术(1)什么是折射率? 其数值与哪些因素有关?(2)使用阿贝折射仪应注意什么?(3)测定折射率有哪些实用意义?(4)超级恒温水浴在测定折射率中起什么作用?3. 6 旋光度的测定技术(1) 偏振光与自然光有什么不同?(2)什么叫做旋光度?(3) 如何确定旋光仪的零点?(4)向旋光管中添加待测液体时,为什么不可带进空气泡?答案3.1沸点的测定技术(1) 测量温度计应固定在试管中距试样液面约2cm处,不能插入液面以下。
2021届高考物理三轮冲刺练习03传送带模型(一)
2020-2021学年度高高考物理三轮冲刺练习03传送带模型(一)一、单选题1.如图所示,水平传送带长为L ,始终以速度v 保持匀速运动,把质量为m 的货物无初速地放到A 点,当货物运动到AC 的中点B 时速度恰为v ,而后被传送到C 点。
货物与皮带间的动摩擦因数为μ,则货物从A 点到C 点的过程中( )A .摩擦力对货物做的功为mgL μB .摩擦力对货物做功的平均功率为12mgL μ C .传送带克服摩擦力做功为mgL μD .传送带克服摩擦力做功的平均功率为12mgL μ 2.如图甲所示,足够长的传送带与水平面夹角为θ,传送带匀速转动,在传送带上某位置轻轻放置一滑块,滑块与传送带间的动摩擦因数为μ,滑块速度随时间变化的关系如图乙所示,图中v 0、t 0已知,则( )A .传送带一定沿顺时针方向转动B .00tan cos v gt μθθ=+ C .传送带的速度大于v 0D .t 0后滑块加速度的大小为002sin v g t θ-二、多选题3.如图所示,一水平传送带以速度v 匀速运动,将质量为m 的小工件轻轻放到水平传送带上,工件在传送带上滑动一段时间后与传送带保持相对静止,在上述过程中( )A .工件对传送带做功为-12mv 2 B .传送带与工件间摩擦产生热量为12mv 2 C .传送带因为传送工件需要多做的功为mv 2D .传送带对工件做的功为12mv 2 4.一足够长的传送带与水平面的夹角为θ,传送带以一定的速度匀速运动.某时刻在传送带适当的位置放上具有一定初速度的物块(如图甲所示),以此时为0t =时刻,作出小物块之后在传送带上的运动速度随时间的变化关系,如图乙所示(图中取沿斜面向下的运动方向为正方向,其中12v v >).已知传送带的速度保持不变,g 取210m/s ,则( )A .10t 时间内,物块对传送带做正功B .物块与传送带间的动摩擦因数tan μθ<C .20t 时间内,传送带对物块做功为22211122W mv mv =- D .1t 时刻之后,物块先受滑动摩擦力,对其做正功,后受静摩擦力,对其做负功 5.质量为M 的超长平板车静止于水平面上,质量为m ,可视为质点的黑色煤球静止在平板车上,煤球与平板车间的摩擦因数为μ,重力加速度为g 。
高中(政治)_必修一03多变的价格(二):价格变动的影响巩固练习
【巩固练习】一、单项选择题1. 价格变化会引起需求量的变动,但不同商品的需求量对价格变动的反应程度是不同的。
下列命题正确反映这一原理的是()A.中高档轿车需求量对其价格变动的反应程度较小B.食盐需求量对其价格变动的反应程度较大C.家庭煤气需求量减少的幅度大于价格上升的幅度D.品牌服饰需求量增加的幅度大于价格下降的幅度2.如果两种商品具有相同的功用,可以满足消费者的同一需要,它们就互为替代品;如果两种商品必须组合在一起才能满足人们的某种需要,它们就是互补商品。
下列商品组合中,互为替代品的是________;构成互补商品的是________()①汽车和火车②钢铁和水泥③汽车和汽油④商品房和建筑材料⑤胶卷和照相机⑥乒乓球和乒乓球拍⑦食品和药品⑧牛肉和羊肉A.①⑧③④⑤⑥B.②④⑤⑥⑦⑧C.①⑦②③④⑤D.①⑧②③⑥⑦3.甲经营水果,乙为甲做果箱,甲采取薄利多销的经营策略,使得水果生意红火,同时也带动了乙的果箱供不应求,去年因金融危机爆发,甲的水果生意萧条,从而使乙的果箱被迫减产。
这说明一种商品价格变化会引起()A.其互补品价格的变化 B.其替代品价格的变化C.其互补品需求量的变化D.其替代品需求量的变化4.价格是市场的信号灯,价格变化给人们的生活和生产带来重要影响,在其他因素不变的情况下,价格与需求、价格与供给的关系可以用上图来表示。
由右图可以看出( )①一种商品的价格上涨,这种商品的需求会相应减少②一种商品的价格上涨,会增加这种商品的供给③商品的价格由价值决定④一种商品的价格取决于该商品的供给和需求A、①②B、②④C、①③D、③④5.假定甲商品和乙商品是互为替代商品,甲商品和丙商品是互补商品。
如果市场上甲商品价格大幅提高,那么在其他条件不变的情况下()①乙商品需求量增加②乙商品需求量减少③丙商品需求量增加④丙商品需求量减少A.①③B.②④C.①④D.②③6. 春秋时期,齐国国王命令大臣们必须穿丝质衣服,但国内只准种粮食而不准种桑树。
高考英语完形填空专题复习:专题03人与社会专练一(原卷版)
高考英语完形填空专题复习:专题03人与社会专练距离高考还有一段时间,不少有经验的老师都会提醒考生,愈是临近高考,能否咬紧牙关、学会自我调节,态度是否主动积极,安排是否科学合理,能不能保持良好的心态、以饱满的情绪迎接挑战,其效果往往大不一样。
以下是本人从事10多年教学经验总结出的以下学习资料,希望可以帮助大家提高答题的正确率,希望对你有所帮助,有志者事竟成!养成良好的答题习惯,是决定高考英语成败的决定性因素之一。
做题前,要认真阅读题目要求、题干和选项,并对答案内容作出合理预测;答题时,切忌跟着感觉走,最好按照题目序号来做,不会的或存在疑问的,要做好标记,要善于发现,找到题目的题眼所在,规范答题,书写工整;答题完毕时,要认真检查,查漏补缺,纠正错误。
总之,在最后的复习阶段,学生们不要加大练习量。
在这个时候,学生要尽快找到适合自己的答题方式,最重要的是以平常心去面对考试。
英语最后的复习要树立信心,考试的时候遇到难题要想“别人也难”,遇到容易的则要想“细心审题”。
越到最后,考生越要回归基础,单词最好再梳理一遍,这样有利于提高阅读理解的效率。
另附高考复习方法和考前30天冲刺复习方法。
1.(2022秋·河北张家口·高一张家口市宣化第一中学校考期末)You can tell a lot about a man by how he treats his dogs.For many years,I enjoyed living with my dogs,Tilly and Chance. Their____1____ was nearly enough to keep my loneliness at bay. Nearly. Last year,I started dating, but with reservations. When I first dated Steve,I ____2____ he had a dog, Molly, and a cat, Flora. While I was____3____ that he was an animal lover, I ____4____ that three dogs were perhaps too many, and my dogs might attack ____5____,the cat.The next week we____6____our dogs together. It was a hot day.When we paused to catch our ____7____, Steve got down on one knee. Was he proposing (求婚)?I liked him too, but so soon? Hepoured water from a bottle into his hand and offered it to my dogs.____8____, I began to fall for him.We ____9____to date, though neither of us brought up the future.And then in late November, Tilly had an operation on her____10____. I took the dogs out four times a day, and I worried that Tilly ____11____ climbing the stairs could reopen the wound. Then Steve suggested his house. All worked ____12____. The three dogs formed a pack that, with coaching, respected Flora’s space; Steve and I formed a good team ____13____ for Tilly. We made good housemates.A year later, much to my delight, this man produced a little box with a ring and proposed to me. He did not kneel (跪) down, nor did I____14____ him to. That’s only for giving ____15____to the dogs that brought us together.1.A.ownership B.membership C.companionship D.leadership2.A.feared B.doubted C.hoped D.learned3.A.unsatisfied B.amused C.terrified D.excited4.A.predicted B.worried C.regretted D.insisted5.A.Flora B.Chance C.Molly D.Tilly6.A.tied B.walked C.bathed D.fed7.A.breath B.balance C.attention D.imagination8.A.By the way B.In that case C.By all means D.In that moment 9.A.continued B.decided C.intended D.pretended10.A.eye B.tail C.ear D.leg11.A.secretly B.constantly C.eventually D.unwillingly12.A.late B.hard C.fine D.free13.A.looking B.caring C.waiting D.calling14.A.beg B.trust C.need D.aid15.A.toys B.awards C.food D.water2.(2022秋·江苏徐州·高一沛县湖西中学校考阶段练习)In a village lived a milkman, who owned a few cows. Though his family wasn’t very ___16___ , they had a self-sufficient life (自给自足). One day, his son asked him what the secret of his life was. He used the opportunity ___17___ his son. “The secret of my life this: The cow doesn’t give milk,” said the father. The boy asked his father in ___18___ , “What are you saying?” “As you hear it, son, you must know the cow doesn’t give milk ___19___ , an d you have to milk it. If you don’t milk it every day, it will ___20___ giving milk. And I won’t be able to support our ___21___ . When you search for ___22___, remember what I said,” said the father.The milkman continued, “I have to get up at 4 o’clock every day. First, I need to clean the waste on the farm. Then I need to ___23___ the legs of the cows and start to milk them. After that, I have to try my best to ___24___ the milk.” Hearing this, the son was ____25____ , and he decided to go to the ____26____ to help his dad.Yes, what one ____27____ is from what one does. Happiness is the result of efforts. A cow doesn’t give milk on its own, and neither do all the things that one ____28____ to have. Thus one has to work hard to get whatever he needs, and it can lead to new ____29____ in life, and one may be ____30____ one day.16.A.lonely B.proud C.friendly D.rich17.A.praise B.influence C.invite D.save18.A.relief B.confidence C.surprise D.comfort19.A.safely B.seriously C.equally D.naturally20.A.stop B.keep C.enjoy D.mind21.A.workers B.village C.family D.tourists22.A.inspiration B.happiness C.friendship D.freedom23.A.control B.mark C.examine D.treat24.A.check B.drop C.drink D.sell25.A.annoyed B.worried C.touched D.satisfied26.A.park B.farm C.forest D.camp27.A.receives B.pays C.cares D.misses28.A.fails B.desires C.happens D.refuses29.A.troubles B.requests C.experiences D.comments30.A.left B.recommended C.ordered D.rewarded3.(2022秋·广东汕头·高三统考期末)A famous author Michael searched for more than a decade for Susan Lung — the second-grade teacher who had changed his life over 20 years earlier. On Saturday night, the two were finally ____31____at one of his book-reading events.Michael was born in Afghanistan and later his family moved to California. A t home, they didn’t speak English, so by the time he reached first grade, Michael was____32____and associated school and learning with punishment and exclusion.Then came Mrs. Lung, who quickly realized that Michael____33____at school, both academically and____34____She recalled that not only did he have to deal with frequently____35____English words that he learned, but he had to deal with the kids who couldn’t understand him. The two got to work,____36____ for one-on-one lessons neatly every day after school. By the end of the school year, Michael was winning reading-comprehension competitions.Lung and Michael lost____37____at the end of their year together. By the time he reached high school, Michael’s parents encouraged him to find his former teacher to____38____her. But despite his efforts, he failed to____39____her down.Then, while____40____ his first novel in a book signing party, he still mentioned Mrs. Lung touching on the great____41____that Lung had on has life. Lung’s doctor happened to re ad it, and he shared the____42____news with Lung at once.Though one thing after another seemed to get in the way, the reunion finally came in a reading event. At the____43____of Mrs Lung, Michael expressed to her how much he still thought of her and how much she____44____to him. And Mrs. Lung asked him to____45____her copy of his first novel, telling him she was part of the way through his first book and she was anticipating the second one.31.A.spotted B.recognized C.invited D.reunited32.A.on a roll B.at a loss C.in a dilemma D.in a mess33.A.battled B.struggled C.played D.cried34.A.socially B.physically C.professionally D.naturally35.A.speaking B.learning C.previewing D.forgetting36.A.studying B.seeking C.meeting D.looking37.A.control B.confidence C.touch D.balance38.A.thank B.support C.memorize D.contact39.A.calm B.bring C.set D.track40.A.writing B.promoting C.revising D.designing41.A.impact B.memory C.experience D.time42.A.valuable B.awful C.shocking D.thrilling43.A.thought B.mention C.sight D.request44.A.meant B.mention C.provided D.did45.A.send B.sign C.write D.sell4.(2023秋·湖南岳阳·高一统考期末)Victor Hugo’s novel Les Miserables was first published in France in 1862 and has been a popular novel ever since. It has been ___46___ for the stage and screen many times. It is a comment on society and on the ___47___ of people through the tale of a man whose life is changed by an act of forgiveness. Forgiveness is a ___48___ repeated throughout the novel.___49___ in the early 19th century in France, the novel records the ups and downs of the prisoner Jean Valjean, a man who has spent nineteen years in prison for ___50___ a piece of bread to feed his hungry sister and many attempted escapes. After being allowed to come out of prison, Valjean cannot get a job because nobody wants to give a job to a former prisoner. ___51___, his life changes when a priest forgives him for stealing from a church. ___52___ the priest forgives him, he goes out and steals some money from a child. He soon remembers the priest’s forgiveness and ___53___ what he has done. He searches for the ___54___ to return the money but now it is too ____55____ --the police are searching for him. If they catch him, he will spent the ____56____ of his life in prison. To ____57____the police, he changes his name from Valjean to Madeleine and eventually becomes a ____58____ man and even a mayor of a town. In his role as mayor, he helps a woman called Fantine and promises to take care of her daughter, Cosette. He treats Cosette like his own daughter and risks his safety for her happiness. Valjean’s new life becomes ____59____ when a policeman guesses who Valjean really is and wants to send him back to prison. What follows is a long ____60____ of cat and mouse which eventually takes Valjean into the dangerous streets of Paris during the 1832 Revolution.46.A.adopted B.approved C.adapted D.adjusted47.A.love B.nature C.thought D.belief48.A.place B.noun C.theme D.name49.A.Set B.Placed C.Said D.Told50.A.buying B.accepting C.wanting D.stealing51.A.Therefore B.However C.So D.Thus52.A.After B.Before C.While D.If53.A.realizes B.remembers C.regrets D.recalls54.A.priest B.policeman C.mayor D.child55.A.early B.sad C.soon D.late56.A.rest B.whole C.best D.worst57.A.catch B.avoid C.beg D.respect58.A.dangerous B.successful C.generous D.secret59.A.glorious B.easy C.bright D.difficult60.A.film B.relation C.game D.event5.(2023秋·吉林长春·高一校考期末)From 2003 to 2007, I gained all the weight back, plus an additional 25 pounds—I hit 180 pounds. I____61____ with depression, and I was very anxious. I knew a change needed to be made, but wasn’t sure how.So, in July of 2017, a month away from my 32nd birthday, I ____62____ up for a mud run with friends. After this run, I remembered how____63____ I was when I ran. I decided to ____64____ going, and began running in the mornings. I had to constantly____65____ myself not to make excuses and signed up for a half marathon for motivation.By November 2017, I had finished the half marathon. My motivation now was to ____66____ up that marathon I had given up years ago. Finally, I was able to complete my____67____ full marathon in May 2019.In 2020,____68____ races were canceled (取消), my running was not. I kept training, and inApril 2020, I completed my second marathon. Next, I took on the 4×4×48 ____69____, where you run four miles every four hours for 48 hours. Now, I get up at 4 a. m. most mornings, six days a week, and run average about 30 miles a week. I create my own plans suited to my next_____70_____, which is to complete my third 26. 2 miles at the 2021 Chicago Marathon. And _____71_____ I will complete my first 50 km the week after. I now try to run one _____72_____ each month to always have something fun to_____73_____.Overall, I have lost 40 pounds. Running helps clear my _____74_____. For me, running is more focused on keeping my mental health than physical health. But you have to have balance between _____75_____. Besides, accomplishment at the end of each goal is wonderful.61.A.struggled B.worked C.played D.agreed62.A.signed B.made C.added D.got63.A.calm B.upset C.tired D.happy64.A.recommend B.avoid C.keep D.appreciate65.A.allow B.remind C.leave D.invite66.A.take B.set C.break D.begin67.A.next B.last C.second D.first68.A.because B.or C.though D.if69.A.attack B.challenge C.chance D.way70.A.behaviour B.goal C.position D.weight71.A.thankfully B.hardly C.necessarily D.hopefully72.A.race B.day C.mile D.week73.A.relate to B.look forward to C.donate to D.give way to74.A.shock B.joy C.disappointment D.anxiety75.A.neither B.none C.both D.all6.(2023秋·河北衡水·高二河北衡水中学校考期末)Although I enjoyed my new life and the time it freed up, there always seemed to be something missing. I thought it was a result of going from a high-activity career to a life of ____76____ The retirement honeymoon lasted for one whole enjoyable year. Golf took up most of my summer, curling (冰壶) in the winter, and hiking ____77____ the times between. At the end of that first year, I was asked by a friend to help out at a local food bank that ____78____ a winter soup kitchen, Initially, my responsibility was not too ____79____ It started out to be only one day a week and took just two hours of my time. The task involved going to the local food bank, ____80____ my car with pre-selected food teas, and diving them to the kitchen ____81____ the weekend. Within a few weeks, I was also helping to sort out the food I was bringing to the charity organization. This soon ____82____ into preparing the cookers and dishes for the weekend event. My duties were ____83____ from one week to the next, which kept things interesting Sometimes, I would help serve meals; other days, I would fill in for sandwich makers who hadn’t turned up for their ____84____ .People who came for the free meals were diverse. Some were homeless, and others were individuals who had fallen on hard times. The common thing uniting all the guests was their _____85_____ toward the volunteers. Most diners would thank the people from whom they had received help. That was a wonderful reward for our forts. Another wonderful thing was that the food was given _____86_____ There was never any expectation to gain public _____87_____ for their donations; they just did it.Gradually, my volunteering _____88_____ have now grown to include two days at the food bank plus the weekend. Although it cost much more time than I first began this volunteering task, I found my time volunteering _____89_____ I can safely say that I get much more _____90_____ out of this type of activity thank ever managed to get from any round of golf or game of curling.76.A.leisure B.depression C.boredom D.adaptation77.A.shared B.cost C.filled D.connected78.A.spread B.ran C.justify D.expected79.A.energy-efficient B.labor-saving C.heart-warming D.time-consuming80.A.loading B.wrapping C.finding D.fixing81.A.in preparation for B.in exchange for C.in expectation of D.in case of 82.A.followed B.improved C.continued D.expanded 83.A.consistent B.creative C.normal D.different84.A.duration B.shifts C.periods D.businesses 85.A.generosity B.guilt C.gratitude D.greeting 86.A.practically B.particularly C.regularly D.selflessly 87.A.promotion B.awareness C.interest D.recognition 88.A.interests B.duties C.challenges D.concems 89.A.necessary B.practical C.worthwhile D.meaningless 90.A.popularity B.admiration C.anticipation D.satisfaction7.(2023·全国·一模)A much-liked university janitor (看门人) was surprised by 230 of the school’s students as they provided him with a truly ____91____ vacation back in June of this year.Herman Gordon ____92____ after Bristol University in England as if it were his own home. Many of his adoring fans at the university ____93____ him as a “legend” and “hero”, and these students thought it their duty to make sure this “cheerful” man could get ____94____ what he deserved.One student in particular posted on social media about how the 65-year-old janitor had not been____95____ to see his family in Jamaica for four years. He set up a JustGiving page to collect donation. ____96____ , the site managed to raise enough money.One of the donors handed Herman the ____97____ gift in an envelope filled with cash. The ____98____ was caught on camera, showing Herman ____99____ down in tears, greatly moved by the _____100_____ . The video was _____101_____ thousands of times online, showing all the donors what they had _____102_____ .Herman and his wife had an _____103_____ vacation. After Herman _____104_____ photos of his celebrity treatment at a five-star hotel, he wrote to the Bristol students, saying: “God bless you all. Everybody will see this and think that I’m a(n) _____105_____.”91.A.recommended B.deserved C.understood D.accepted 92.A.takes B.goes C.looks D.asks93.A.described B.mistook C.welcomed D.appointed94.A.over B.down C.through D.back95.A.willing B.able C.ready D.determined 96.A.Eventually B.Honestly C.Particularly D.Actually97.A.festival B.birthday C.surprise D.comfort98.A.accident B.chance C.deal D.moment99.A.slowing B.climbing C.breaking D.falling100.A.politeness B.kindness C.thoughtfulness D.smartness101.A.shared B.bought C.reported D.edited 102.A.overlooked B.designed C.achieved D.witnessed 103.A.economical B.educational C.adventurous D.amazing 104.A.exchanged B.released C.retouched D.found105.A.millionaire B.adventurist C.tourist D.explorer8.(2023秋·山东淄博·高一山东省淄博实验中学校考期末)It was a few days before Christmas many years ago. It looked like it would be a (n) ____106____ one for my family. The factory where I was working had laid off (解雇) many of us workers, so we didn’t have much ____107____. My wife and I had saved to buy our young children some toys, ____108____ an unexpected car repair had taken most of our cash. We decided that we could only ____109____ to get one small gift for each of our children.We arrived at the ____110____, walked down the parking lot and saw people putting gifts into their ____111____. We searched all through the store ____112____ to find one thing each of our small children would like. ____113____, we were able to get one for each of them. We ____114____ the checkout (收银台), bought the toys and were surprised that we even had a few dollars ______115______. As we walked out of the store into the winter air, I stopped and dropped those ______116______ into the charity box. I didn’t have a dime (一角硬币) left but that didn’t ______117______. Suddenly, it felt like Christmas.I think the wonderful actress Dale Evans _____118_____ it best when she said: “Christmas, my child, is love in ______119______.” It doesn’t have to be a gift of money, either. When we ______120______ our smile, it’s Christmas. When we do anything at any time to help another, it’s Christmas. May you do all you can to make it Christmas every day of the year and every day of your life here.106.A.colorful B.poor C.early D.exciting107.A.time B.energy C.noise D.money108.A.but B.or C.so D.if109.A.refuse B.remember C.afford D.hesitate110.A.store B.station C.gym D.hospital111.A.offices B.bedrooms C.cars D.houses112.A.forgetting B.agreeing C.failing D.hoping 113.A.Immediately B.Thankfully C.Sadly D.Strangely 114.A.headed for B.gave up C.turned off D.kept off115.A.watched over B.looked over C.left over D.taken over 116.A.gifts B.books C.dollars D.fruits117.A.work B.bend C.stop D.matter118.A.put B.broke C.threw D.cleaned119.A.force B.control C.action D.silence120.A.hide B.share C.change D.support9.(2023秋·宁夏吴忠·高一青铜峡市高级中学校考期末)It was a bitter winter morning in Kennewick, Washington. John Lunceford saw a crying child along his bus___121___to school. Tears rolled down the young boy’s cheeks as his bare (裸露) hands and ears were___122___red because of the bitter cold. Lunceford took his___123___off, which he gave to the child, and said, “It’ll be OK.” “I’m a grandfather. No one wants a kid to___124___like that,” Lunceford said. His heart___125___because of the poor child, knowing the ___126___winter was lying ahead.After___127___the kids off at school, the three-year bus driver and former (昔日的) US Army soldier went to the___128___to buy ten sets of gloves and hats.He returned to the___129___and determined to find the boy. A school worker ____130____Lunceford to the library, where the boy was studying with his class. There Lunceford ____131____the boy with a new pair of gloves and a hat.But the little boy was just the____132____. Many other students would receive the____133____of their familiar bus driver. He announced to the students in the library that anychild found without a hat or gloves along his bus route would be given a set.One little girl____134____said she didn’t have a hat. As Lunceford____135____her a comfortable hat, he smiled and said, “I’ll take care of you, sweetie.”121.A.entrance B.duty C.trip D.route122.A.totally B.generally C.merely D.roughly123.A.overcoat B.glasses C.gloves D.socks124.A.work B.suffer C.wait D.behave125.A.lost B.recovered C.changed D.ached126.A.latest B.coldest C.hottest D.shortest127.A.dropping B.taking C.rolling D.sending 128.A.company B.park C.store D.bank129.A.home B.station C.library D.school130.A.fetched B.invited C.guided D.followed 131.A.disappointed B.blamed C.surprised D.charged 132.A.center B.beginning C.attention D.end133.A.comment B.prize C.challenge D.kindness 134.A.immediately B.jokingly C.finally D.obviously 135.A.made B.promised C.handed D.lent10.(2022·广东·高三汕头市潮阳实验学校校联考阶段练习)Enjoying a swim at their local beach was once a daily pleasure for Melati and her sister, Isabel. But in 2013 when Melati was 12 and Isabel just ten, the sisters started to lose ____136____ for swimming in the waters near their home on the island of Bali. More often than not, plastic bags would circle around them as they ____137____ . Then as they walked back to shore, red and white plastic shopping bags would____138____ their legs and body.Melati didn’t think much about it until later in 2013 when her teacher gave a lesson on world ____139____ li ke South Africa’s Nelson Mandela and England’s Princess Diana, whose efforts had inspired movements of ____140____ change. That day Melati walked home in ____141____ , thinking something needed to be done to preserve the beautiful island from becoming ____142____ by waste.Melati and Isabel started by sharing the idea with others. Soon they’d ____143____ a team of 15, made up of school friends. They ____144____ their group ByeBye Plastic Bags(BBPB). Its mission was _____145_____ to stop people in Bali using plastic bags.The following year the BBPB team spent their lunchtimes _____146_____ meetings and organizing an online petition (请愿) to collect signatures to ban plastic bags. Within 24 hours of _____147_____ , more than 6000 people both local Balinese and people from around the world had _____148_____ . “This was the first moment when we knew, we were onto something,” Melati says.Years later, the girls’ enthusiasm has resulted in big changes. In 2017, they organized Bali’s first beach clean up. Around 12,000 people collected 36 tonnes of rubbish. In 2018 BBPB _____149_____the government to ban single-use plastic bags and straws. The ban took effect in July 2019.Today BBPB is a global youth movement and has over 50 teams in 29 countries. “We didn’t sta rt with any clear _____150_____ ,” Melati admits. “We didn’t know how we were going to complete a seemingly easy task but we knew that we wanted to and had the desire to figure it out. ”136.A.talent B.passion C.hope D.balance137.A.swam B.trained C.observed D.wandered138.A.relate to B.lead to C.add to D.stick to 139.A.performers B.heroes C.composers D.champions140.A.awful B.commercial C.positive D.slight141.A.silence B.fear C.safety D.despair 142.A.lengthened B.narrowed C.recovered D.jammed 143.A.controlled B.assisted C.gathered D.supported144.A.sent B.showed C.named D.lent145.A.simply B.hardly C.completely D.commonly 146.A.avoiding B.chairing C.discussing D.analyzing 147.A.valuating B.debating C.removing D.launching148.A.held up B.finished up C.picked up D.signed up 149.A.encouraged B.threatened C.convinced D.expected 150.A.aim B.plan C.benefit D.Profit高考质量提升是一项系统工程,涉及到多个方面、各个维度,关键是要抓住重点、以点带面、全面突破,收到事半功倍的效果。
语文统编版(2024)1年级上册汉语拼音第7课 z c s 同步练习03
同步练习《z c s》一、选择题1.下列汉字声母是c的是()A.火克B.词蚕C.菜上D.吃木2.“自己做饭”的读音为()A.zì jǐ zuò fàn B.zì jǐ zhuò fàC.zhī jǐ zuò fàn D.zhì jǐ zuò fià3.“小明上学”的读音为()A.xiǎ míng sàng xuéB.xiǎo míng shàng xuéC.xiǎo mín shàng xuéD.xiǎ mín sàn xué4.选择符合句意的图片:chàng shān gē。
()A.B.5.“四十”与“十四”的读音为()A.sì shí、sí shìB.sì sí、shí sìC.sì shí、sí sìD.sì shí、shí sì6.选择符合拼音的图片:cán sī。
()A.B.7.选出声母不同类的一项()A.字B.杂C.花D.左二、书写8.默写平舌音和翘舌音平舌音:翘舌音:9.拼一拼,再写下来。
z—é→z—ǔ→ch—ē→r—u—ò→sh—ǔ→sh—u→ō10.写拼音三、连线题11.把下列生字和相应的读音连起来。
四子字足坐词zìcísìzǐzúzuò四、填空题12.看图片,补全音节。
ì gèyǐ i ā bō liwei jīdiǎn13.我会填。
z—( )—( )→zuò( )—( )—( )→cuōs—u—ǒ→( )l—( )→lǚ14.给下列声母加上“i”变成整体认读音节。
高教版中职语文基础模块下册03 人生的境界(同步练习)含答案
03 人生的境界同步练习一、基础知识训练1. 下列词语中加点字的读音完全正确的一项是()。
A. 干涸.(ké)触.犯(chù)禅.宗(shàn)解释.(shì)B. 詈.骂(lì)洞穴.(xuè)风俗.(shú)蹉.跎(cuō)C. 干坼.(chè)觉解.(jiě)境界.(jiè)敦.厚(dūn)D. 差.异(chà)奇迹.(jì)沮丧.(sānɡ)污垢.(ɡòu)2. 下列没有错别字的一组是()。
A. 与时具进狭隘振聋发聩精悍B. 两全齐美奇跡安常处顺伺候C. 闲情逸致蒙昧引疚自责蹋实D. 枉费心机匡正夙兴夜寐妨碍3. 依次填入下列横线处的关联词,最恰当的一项是()。
天地境界又可以叫做哲学境界,________只有通过哲学,获得了对宇宙的某些了解,________达到天地境界。
________道德境界,________哲学的产物。
A. 因为也能但是也能B. 因为才能但是也是C. 由于才能因为也是D. 由于也能因为才能4. 下列选项中没有语病的一项是()。
A. 我在《新原人》一书中曾说,人与其他动物相同,在于人做某事时,他了解他在做什么,并且自觉地在做。
B. 一个人做事,可能只是顺着他的本能或其社会的风俗习惯。
C. 照中国理学的传统,理学的任务帮助人达到道德境界和天地境界,特别是天地境界。
D. 他做的都只是平常人所做的事,但是由于有高度的觉解,他对于他所做的事就有不同的意义。
5. 下列各项中对“正其义不谋其利”一句理解正确的一项是()。
A. 匡正道义而不谋求自己的私利。
B. 有明确政治、道德、思想、言论方面的行为,而不谋求自己的私利。
C. 将违反原则、标准或规定的道德、思想、言论礼仪等方面的东西匡正过来而不谋求私利。
D. 端正自己的礼义却不谋求自己的私利。
6. 下列句子,与语段衔接得最恰当的一项是()。
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(3)猜一猜:几个几分别表示图上的什么?
根据黑板上的“几个几”分别列出乘法算式。
(4)全班交流:结合图意说说每个乘法算式的意义。
三、总结评价。
1.这节课学习了什么内容?有什么收获?
2.学习手册第3页2、3(3)、5、6题
课堂生成及反思
经过两节课的学习学生已经完全可以理解还有学生找不准几个几,这样的练习还要加强训练。
第(2)小题,步骤同上,同桌交流,说说这个算式表示的意思以及是如何得来的。
2、出示第7题
(1)用简练的语言表述图意
(2)追问:也就是“几个几相加”呢
(3)独立列式:2×4=8(个)或4×2=8(个)。
(4)分析乘法算式
3、出示第8题
(1)独立完成算式
(2)汇报交流
4、出示第10题
(1)小组讨论:找出“几个几”并完成在书上。
教学过程:
一、精讲点拨。
第一组练习:
3+3+3+3=□×□5+5=□×□
6+6+6=□×□4+4+4+4+4=□×□
完成算式,并说说等号左右两边算式表示的意义。
你发现了什么(形式不同,意义相同)
小结:乘法是由加法而来,是比加法更简便的形式,它们表示的意义都相同,都表示“几个几相加”
第二组练习
3个5相加7个2相加2个4相加
(1)写出乘法算式,并计算出结果。
(2)追问:你是怎样算出结果的?为什么可以通过加法来计算?
二、迁移应用
1、出示第6题
第(1)小题,
(1)用自己的话说说图意;
(2)完成图右边的填空;
(3)完成算式:2×3=6(个)或3×2=6(个);
(4)提问2、3、6分别表示什么?2×3或3×2表示什么?
(5)6是怎么得来的呢,除了看图还有别的方法吗
序号:03主备人:
时间:9月3日
课题:练习一(2)
教学内容:书上5-6页
教学目标:1、进一步加深对乘法意义的理解,巩固对乘法的认识。
2、进一步理解乘法的含义,培养学生分析、综合、抽象、概括的能力。
教学重点:从实际情境中抽象出求几个几相加是多少的数学问题,并能列出乘法算式解决问题。
教学难点:进一步理解加法与乘法的联系。