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真理,即永恒不变唯真正理。
诞生 碱 凹凸 纬度
裔 华罗庚 锲而不舍
诞生 碱 凹凸 纬度
裔 华罗庚 锲而不舍
āo tū wěidàn jiǎn
yì huà ɡēnɡ qiè
诞 澡 械 授 涡 逆
纬 砂 庚 域 锲
dàn zǎo xiè shòu wō nì
shāwěi yù qièɡēnɡ
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诞
dàn 注意右部与
“廷”的区别
械
xiè
不要少写 “丿”
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冲 chōng 冲洗,气冲冲
chòng 冲压,冲劲儿
例 : “ 琳 琳 , 把 水 果 多 冲
(chōng)洗几遍,洗干净点
儿啊!”妈妈冲(chòng)我
喊道。
转 zhuǎn 旋转,转身
zhuàn 自转,转圈
例:在爷爷的抽打下,那只
旋转(zhuǎn)的陀螺竟然绕
着我不停地转(zhuàn)圈。
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定理:已经证明具有正确性、可以作为原则或规律的命题或
公式,如几何定理。
定律:科学上对某种客观规律的概括,反映事物在一定条件
下发生一定变化过程的必然关系,如能量守恒定律。
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司空见惯:指看惯了就不觉
得奇怪。文中是说一些现象
常见就不觉得奇怪了。
对于他的无理取闹,我们早已司空见惯。
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无独有偶:虽然罕见,但
是不只一个,还有一个可
以成对儿。文中是说这样
的事不止一件。
无独有偶,最近另一家技术公司也发布了一个免费软件。
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见微知著:见到一点儿苗
头就能知道它的发展趋向
或问题的实质。
学习就是一个见微知著的过程。
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锲而不舍:雕刻一件东西,一
直刻下去不放手,比喻做事情
能坚持到底,不半途而废。也
形容有恒心,有毅力。
学习要有锲而不舍的精神。
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打破砂锅问到底:比喻追究事情
的根底。课文中用一句口头禅形
象地写出探索精神的重要性。
妹妹从小遇事就爱打破砂锅问到底。
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近义词 反义词
诞生——出生 疑问——疑惑
敏感——敏锐 吻合——契合
搜集——搜罗 分布——散步
司空见惯——屡见不鲜
锲而不舍——持之以恒
真理——谬论 敏感——迟钝
无聊——有趣 偶然——必然
司空见惯——鲜为人知
锲而不舍——半途而废
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作者在文中提出的观点是什么?
真理诞生于一百个问号之后。
相关段落 主要人物 具体事例
第3自然段
第4自然段
第5自然段
英国化学家
波义耳
德国气象学
家魏格纳
睡眠专家阿
瑟林斯基
从紫罗兰变色受启
发,发明石蕊试纸
发现地图中的秘密,
整理出“大陆漂移学说”
人睡觉时眼珠的转动
与做梦有关
为了论证中心论点,作者阐述了几个具体事例?
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本文是采用什么结构来写的呢?
按“___________”的结构写的,先提出中心论点,
用三个事例证明中心论点,最后总结全文,重申论点。
总—分—总
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为了证明“真理诞生于一百个问号之后”这个
观点,课文具体写了三件事例,接下来让我们来看
看每个事例是按照怎样的顺序来介绍的?
发明石蕊试纸
紫罗兰为什么会变红
谁知过了一会儿,溅上盐酸
的花瓣竟奇迹般地变红了。波义
耳立即敏感地意识到,紫罗兰中
有一种物质遇到盐酸会变红。
花瓣竟奇迹般地变红了
发现真理的前提
细微的、司空见惯的现象
那么,这种物质到底是什么?……
不断地追问
不断质疑 勇于探索 锲而不舍
反复实验
追根求源
这一奇怪的现象以及一连串的问题,促
使波义耳进行了许多实验。
大部分花草受酸或碱
的作用都会改变颜色
解决疑问 发明石蕊试纸
发现真理我们需要有——
波义耳的事例给了你怎样的启示?
强烈的求知欲敏锐的观察力
勇于探索的精神 不断追求的韧性
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按照第一个事例的学习方法,对照表格自己完成。
人物 “?” 从“?”到“!”
的过程 “!”
魏格纳
奥地利
医生
美国东海岸有一种蚯
蚓,欧洲西海岸同纬
度地区也有这种蚯蚓,
为什么美国西海岸却
没有这种蚯蚓?
蚯蚓的这种分布情况正说
明欧洲大陆与美洲大陆本
来是连在一起的,后来裂
开了,分为两个洲。
引起了注意
眼珠转动会不会与做
梦有关呢?会有什么
关系呢?
以儿子、妻子、
邻居为实验对
象,进行了反
复的观察实验
当睡觉的人眼珠转动
时,他确实正在做梦。
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最平常的小事
这三个事例有什么共同点呢?
请用书上的一个词语来形容。
司空见惯
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不足为奇 见怪不惊 不乏先例
层出不穷 熟视无睹 屡见不鲜
词语积累(和“司空见惯”意思相近的词语)
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这三个事例是按照怎样的顺序来介绍的?
从细小的、司空见惯的现象中看出问题
不断发问
不断解决问题
追根溯源,找到真理
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读一读第8自然段,说一说这三
个事例中的主人公都有怎样的特点?
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……这些都是很平常的事情。善于“打破砂锅问
到底”的人,却从中有所发现,有所发明,有所创造,
有所成就。
不断探索
锲而不舍
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他们都善于从细小的、司空见惯的现象中看出问
题,不断发问,不断解决疑问,追根求源,最后把
“?”拉直变成“!”,找到了真理。
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读一读最后两个自然段,说一说
“真理诞生于一百个问号之后”这句
话的含义。
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只要你见微知著,善于发问并不断探索,那么,当
你解答了若干个问号之后,就能发现真理。
这种“偶然的机遇”只能给那些有准备的人,给那
些善于独立思考的人,给那些具有锲而不舍精神的人。
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“真理诞生于一百个问号之后”这句话的含义是:
只要善于观察, 不断发问, 不断解决疑问, 锲
而不舍地追根求源, 就能在现实生活中发现真理。
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学完这篇课文,你受到了怎样的启发?
科学并不神秘,也不遥远,关键在于“知微见著”,
不断探索,善于独立思考,具有锲而不舍的精神。
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提出观点:真理诞生于一百个问号之后
发明石蕊试纸
运用事例
证明观点
重申全文,总结全文
真理
诞生
于一
百个
问号
之后
睡觉时眼珠的转动
蚯蚓的分布
见微知著
善于发问
不断探索
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本文开门见山提出论点“真理诞生于一百个问
号之后”,接下来主要用科学发展史上的_____有
代表性的事例,证明了只要_________、_________、
______________,锲而不舍地追根求源,就能在现
实生活中发现真理。
善于观察 不断发问
三个
不断解决疑问
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仿照课文的写法,选择下面任一观点用几个具体的事例来说明。
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清代小说家蒲松龄在自己后期的科举考试屡次不中、
落魄至极之际,亲自写下励志自勉联:“有志者事竟成,
破釜沉舟百二秦关终属楚;苦心人天不负,卧薪尝胆三千
越甲可吞吴。”开始时是刻在铜尺之上,后悬置于书屋聊
斋书房。终于他凭着自己的雄心壮志,不懈努力,以一部
《聊斋志异》名垂青史,成就一番大事。
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地理课件:www.1ppt.com/kejian/dili/ 历史课件:www.1ppt.com/kejian/lishi/ 春秋时期,吴越相争,吴胜越败,越王勾践沦为阶下
囚。但他不甘屈服,立志复仇,最后终于打败了吴国,留
下了“卧薪尝胆”的千古美谈。
著名数学家华罗庚小时候面对“没有数学头脑”的斥
责而确立志向,虽然连初中毕业文凭都没有,但最终成为
数学领域的巨人……
古今中外诸多的政治家、科学家,都以其自身的行动
证明了“有志者事竟成”这句话的正确性。
一、根据意思写词语
(1)形容某事物常见,就不觉得奇怪了。( )
(2)并非只此一个,还有一个可以和它配成一对。( )
(3)对事情寻根究底,要搞个明白。( )
(4)经过多次、反复地思考,也不能理解。( )
司空见惯
无独有偶
打破沙锅问到底
百思不得其解
1.看得多了,习以为常。
2.见到事物的苗头,就能知道它的实质和发展趋势。
二、根据句意写词语:
3.比喻有恒心,有毅力。
—————见微知著
—————司空见惯
—————锲而不舍
三、按要求改写句子。
(1)英国著名化学家波义耳正急匆匆地向自己的实验室走去。
(缩句)
(2)在外国租界,谁又敢怎么样?(改为陈述句)
(3)没有大胆的猜测就做不出伟大的发现。(改为反问句)
波义耳向实验室走去。
在外国租界,谁也不敢怎么样。
没有大胆的猜测怎么能做出伟大的发现呢?