高考易错题对比100例课件

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高考数学易错题解析.ppt

高考数学易错题解析.ppt

则由 1 bc sin 3 , 0≤bc cos ≤6 ,可得
2
0≤
【错解】(Ⅱ)f
cot ≤1
( ) 2sin
2

π 4
Байду номын сангаас
π 4
,π 2
3 cos
2
1
cos
π 2
2
3 cos 2
(1 sin 2 ) 3 cos 2
【错解】(Ⅱ)
f
(
)
2
sin 2
π 4
3 cos 2
1
cos
【例4】已知:a 0,b 0, a b 1.

a
1 a
2
b
1 b
2
的最小值.
【正解】由 a b 1, a b 2 ab 知
ab
1 4
,
1 ab
4
思路一:展开(均值思想)
a
1 a
2
b
1 b
2
a2
1 a2
b2
1 b2
4
a2
1 16a2
b2
1 16b2
15 16a2
15 16b2
③+④得
10 3a b 43 , 即10 f (3) 43.
3
33
3
3
【评注】这种解法,忽视了这样一个事实:作为满足条件的函数
f
(x)
ax
b x
,其值是同时受 a和b 制约的.当 a
取最大(小)值时,b 不一定取最大(小)值,因而整个解题
思路是错误的.忽视等价性变形,导致错误.
【例2】已知
2
π 3
1
3
【例4】已知:a 0,b 0, a b 1.

2024年高考生物易错题(新高考专用)易错点13种群的“四个”易混点2

2024年高考生物易错题(新高考专用)易错点13种群的“四个”易混点2

易错点13 种群的“四个”易混点 目 录01 易错陷阱(四大陷阱)02 举一反三【易错点提醒一】种群数量≠种群密度 【易错点提醒二】样方法≠调查植物方法【易错点提醒三】最大捕捞量≠最大日捕捞量【易错点提醒四】λ≠增长率03 易错题通关易错陷阱1:种群数量多,种群密度就大【分析】种群密度是指种群在单位面积或单位体积中的个体数,种群数量多,还要考虑面积或体积,密度不一定大。

易错陷阱2:样方法只能用来调查植物的种群密度【分析】活动能力弱、活动范围小的动物常采用样方法。

易错陷阱3:最大捕捞量就是最大日捕捞量【分析】种群数量在K 2时种群的增长速率最大,捕捞剩余在K 2能使种群数量快速增长,有利于获得最大持续产量。

要获得最大的日捕获量则应该在种群数量为K 值时。

易错陷阱4:种群计算公式中的λ指的就是种群增长率【分析】λ指的是当年数量跟前一年数量的倍数关系,不是相比前一年的增长率。

【易错点提醒一】种群数量≠种群密度【例1】下列与种群密度有关的叙述,正确的是( )A .一块草地上所有蒲公英的数量是该草地蒲公英种群的种群密度B.可以用样方法调查青蛙、蚜虫等活动范围不大的动物的种群密度C.渔网网目过小,有利于种群数量的快速恢复,增加来年鱼产量D.用性引诱剂大量诱杀某农业害虫的雄虫不会影响该种群的密度【变式11】某农场面积为140hm2,农场丰富的植物资源为黑线姬鼠提供了很好的生存条件,鼠的大量繁殖吸引鹰前来捕食。

某研究小组采用标记重捕法来研究黑线姬鼠的种群密度,第一次捕获100只,标记后全部放掉,第二次捕获280只,发现其中有2只带有标记,下列叙述正确的是()A.该农场黑线姬鼠的种群密度约为14000只/hm2B.黑线姬鼠在捕捉一次后更难捕捉,导致统计的种群密度比实际密度大C.黑线姬鼠种群数量下降说明农场群落的物种丰富度下降D.此调查方法也可用来调查蚜虫、跳蝻的种群密度【变式12】某些集群生活的动物在种群最适密度时存活率最高,低于或高于最适密度都可能降低存活率,使种群增长受到抑制。

高考易错题对比100例ppt课件

高考易错题对比100例ppt课件

D. wherever
常见心律失常心电图诊断的误区诺如 病毒感 染的防 控知识 介绍责 任那些 事浅谈 用人单 位承担 的社会 保险法 律责任 和案例 分析现 代农业 示范工 程设施 红地球 葡萄栽 培培训 材料
3. ① It’s nine o’clock __C__ we got to
the station.
常见心律失常心电图诊断的误区诺如 病毒感 染的防 控知识 介绍责 任那些 事浅谈 用人单 位承担 的社会 保险法 律责任 和案例 分析现 代农业 示范工 程设施 红地球 葡萄栽 培培训 材料
10.①He is one of the students
1.①Study hard ,___D___you’ll succeed. ②Study hard, __B___ you’ll fail.
A. unless B. or C. but D. and
常见心律失常心电图诊断的误区诺如 病毒感 染的防 控知识 介绍责 任那些 事浅谈 用人单 位承担 的社会 保险法 律责任 和案例 分析现 代农业 示范工 程设施 红地球 葡萄栽 培培训 材料
9. ①We young people should go _____
weB’re most needed.
② We young people should go to
___C___ we’re most needed.
A. the place which B. where
C. the place where D. which
常见心律失常心电图诊断的误区诺如 病毒感 染的防 控知识 介绍责 任那些 事浅谈 用人单 位承担 的社会 保险法 律责任 和案例 分析现 代农业 示范工 程设施 红地球 葡萄栽 培培训 材料

高考短文改错错点分类归纳课件

高考短文改错错点分类归纳课件

详细描述
虚拟语气错误通常是由于混淆了虚拟语气和真实条件句所导致的。例如,“If I were you, I would do it”应该改为“If I was you, I would do it”。
非谓语动词错误
总结词
非谓语动词错误是指句子中的非谓语 动词(如不定式、动名词等)使用不 当。
详细描述
介词错误
01
介词搭配不当
02
介词遗漏或多余
03
介词搭配不当,如介词与动词、形容词等 搭配不正确。
04
介词遗漏或多余,如句子中缺少必要的介 词或多余的介词出现。
02
语法错误
主谓不一致
总结词
主谓不一致是指在句子中主语和谓语动词的数不一致的情况 。
详细描述
主谓不一致是常见的语法错误之一,通常是由于主语和谓语 动词的数不一致所导致的。例如,“The students are reading books”应该改为“The students are reading books”。
详细描述
段落间逻辑关系错误通常表现为段落顺序混乱、段落内容重复或段落间缺乏过渡等。这 些错误会影响文章的整体连贯性和可读性。
全文逻辑结构混乱
要点一
总结词
全文逻辑结构混乱是指文章整体结构不清晰,段落和句子 之间的逻辑关系混乱,导致读者无法理解文章的中心思想 。
要点二
详细描述
全文逻辑结构混乱可能表现为文章开头没有明确主题、结 尾没有总结或文章结构跳跃等。这种错误会导致读者对文 章的整体思路和中心思想产生困惑,影响理解和评价。
高考短文改错错点分 类归纳课件
目录
CONTENTS
• 词汇错误 • 语法错误 • 语义错误 • 行文逻辑错误 • 特殊改错点

高考语文一轮总复习课件第三部分专题一一命题设误定位比对

高考语文一轮总复习课件第三部分专题一一命题设误定位比对
问题
如何提高阅读速度?
解答
提高阅读速度需要平时多加练习,掌握阅读技巧,如略读、扫读等。 同时,扩大词汇量也有助于提高阅读速度。
常见问题及解答
问题
如何避免主观臆断?
解答
避免主观臆断需要客观分析文本内容,不要将自己的观点和想法强加给作者。同 时,要注意文本中的限定词和修饰语,不要忽略它们对文意的影响。
利用上下文语境
结合上下文语境,推断句子间的逻 辑关系。
逻辑关系比对技巧
排除绝对化选项
注意选项中的绝对化表述,如“一定 ”、“必须”等,往往这些选项存在 逻辑错误。
比较选项差异
代入原文验证
将选项代入原文进行验证,检查是否 符合原文的逻辑关系。
对比不同选项间的差异,找出逻辑关 系上的矛盾点或不一致之处。
因果倒置
在选项中故意将原文中的因果关 系颠倒,使得选项与原文逻辑不
符。
无中生有
在选项中故意添加原文中没有的 信息或内容,导致选项与原文意
思不符。
命题设误识别方法
仔细审题
认真阅读题干和选项,理解题目要求和考查内 容。
辨析选项
对比选项之间的差异和联系,分析选项与原文 的符合程度。
回归原文
将选项与原文进行对照,查找并确认选项中的 设误之处。
典型例题解析与实战演练
例题解析
通过解析典型例题,讲解如何运用逻辑关系定位与比对技巧 来解答题目。
实战演练
提供一定数量的练习题,让学生在实际操作中掌握和运用逻 辑关系定位与比对策略。同时,通过反复练习,提高学生的 解题速度和准确率。
06
答题规范与应试技巧
答题规范要求
01
审题准确
认真阅读题干,明
确题目要求,避免

高中英语易错句型对比训练课件.ppt

高中英语易错句型对比训练课件.ppt

6. Tom insisted that I_B____ with him.
A. went
B. go
C. going
D. will go
Tom insisted that he_A____ right.
A. was
B. were
C. be
D. is
7. He is unfit for his office, _D_he? He is not fit for his office, _B_ he? A. does B. is C. doesn’t D. isn’t
Mary ___A__ sure to come at six
o’clock.
A. is
B. be
C. does
D. do
11. Is that factory _D__ you visited last year? Is that the factory __A___ you visited last year? Is that the factory__B___ you worked last year? Is that the factory_B___ you visited a new working
line last year? A. that B. where C. one D. the one 12. __A__ he doesn’t like them is quite clear to us.
___B__ he doesn’t like is quite clear to us. A. That B. What C. Whether D. As
A.how B. that C. what D. which

高考易溷易错对比句选择100例.ppt

高考易溷易错对比句选择100例.ppt

A. anytime B. sometime C. some times D. sometimes
11. I’m afraid I can’t make myself ____B____.
I’m afraid I can’t make myself ____A____ it.
A. understand B. understood C. understanding D. to understand
21. In this university, John is the one of the professors who _B__ Chinese.
In this university, John is one of the professors who __A___ Chinese.
In this university, John is among the professors __C___ Chinese.
The biggest stone weighs ___C____ 15 tons.
A. as well as B. as far as
C. as much as D. as many as
24. I hear that you’ve been to England ___C____ on business.
D. doing
3. Jack hopes that he ___B_____ visit the Great Wall in China some day.
Jack wishes that he___D_____ visit the Great Wall in China some day.
A. must
What were the couple fighting ____D____ last night?

广东省高考数学文科复习专题突破易错易漏易混题集共106页PPT

广东省高考数学文科复习专题突破易错易漏易混题集共106页PPT


27、只有把抱怨环境的心情,化为上进的力量,才是成功的保证。——罗曼·罗兰

28、知之者不如好之者,好之者不如乐之者。——孔子

29、勇猛、大胆和坚定的决心能够抵得上武器的精良。——达·芬奇

30、意志是一个强壮的盲人,倚靠在明眼的跛子肩上。——叔本华
பைடு நூலகம்
谢谢!
106

26、要使整个人生都过得舒适、愉快,这是不可能的,因为人类必须具备一种能应付逆境的态度。——卢梭
广东省高考数学文科复习专题突破易错 易漏易混题集
1、合法而稳定的权力在使用得当时很 少遇到 抵抗。 ——塞 ·约翰 逊 2、权力会使人渐渐失去温厚善良的美 德。— —伯克
3、最大限度地行使权力总是令人反感 ;权力 不易确 定之处 始终存 在着危 险。— —塞·约翰逊 4、权力会奴化一切。——塔西佗
5、虽然权力是一头固执的熊,可是金 子可以 拉着它 的鼻子 走。— —莎士 比
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20.① Our teacher classroom, ______ . B
entered
the
②Our teacher entered the classroom, with _____ . C A. a book in hand
B. book in hand C. a book in his hand
15. ①We will never forget the days _______ we spent together. A D
②We will never forget the days_______we worked together. D
A. that B. where
C. on which
B ②It is 3 years ago _____ his brother joined the army.
D ③ It’ll be 3 years _____ he comes back
A. since
C. after
B. that
D. before
B 33. ①They don’t know _____ he will come unless told.
高考易混易错
对比
选择题100例
前言 学习英语要在系统掌握的 基础上加强对比,仔细推敲其 中相同和相异之处,这样才 能有效地巩固所学的语言知 识、提高解题能力。
D 1.①Study hard ,______you’ll succeed.
B ②Study hard, _____ you’ll fail.
C. the place where
B. where
D. which
10.①He is one of the students who_______ good at drawing. C ②He is the only one of the students who_______ good at drawing. A
C. where
B. in it
D. wherever
3. ① It’s nine o’clock ____ we got to C the station.
B ② It’s at nine o’clock ____ we got to the station.
A. as B. that C. when D. while
D. when
16. ①Tom got the first place,______ B made his parents happy. ②Tom got the first place, and _____ made his parents happy. C A. as
C. that
B. which
A ②They don’t know ______ he will come until told.
A. that B. whether
C. how long
D. if or not
D 34. ① I _____10 dollars on the dictionary.
new new
D ②The workers ______ a hospital by the end of last year.
C. had built D. were building
A. have built B. have been building
A 32. ①It is 3 years ______ his brother joined the army.
plays
C ②My brother often plays ______ piano after school.
A. 不填 B. a
C. the
D. an
25.①She is ______ good a teacher A that we all like her .
C ②She is _____ good teacher that we all like her.
13.①New York is much larger than _______in America. D
② New York is much larger than _______ in India. B
A. other city B. any city
C. all cities
D. any other city
A ② ______ do you think John is getting on with his studies?
A. how B. which
C. what
D. that
B 31. ①The workers ______a hospital since the end of last year.
D. book in his hand
21.① ______many times, so he could C understand it.
D ② _____ many times, he couldn’t understand it.
A ③______many times, couldn’t understand it.
A. unless B. or C. but D. and
2. ①He lived in the city of Beijing ______there’s a theme park. C ②He lived in the city of Beijing and _____ there’s a theme park . B A.in that
12.①The little girl had no choice but _______ at home. A ②The little girl could do nothing but ______ at home. D A. to stay
C. stayed
B. to staying
D. stay
A 28. ①He as well as his brother _____ footballother ______ football now.
A. is playing C. are playing B. is played D. are played
D. these
D 17. ①He needs ______ on.
A ②The doctor needs ____ on him.
A. to operate
C. operate
B. being operated
D. to be operated
A 18. ①He is unfit for the job, ______ ?
C 4. ①______ he said so made us very happy. B ② ______ he said made us very happy.
A. Which B. What
C. That
D. it
C 5. ①Is this bike _____ she lost the day before yesterday? A ②Is this the bike _____ she lost the day before yesterday?
B ②He isn’t fit for the job, _______ ?
A. isn’t he B. is he
C. doesn’t he
D. dose he
19. ①Let's go at once, ______? B
A ②Let us go at once, ______ ?
A. will you C. do you B. shall we D. does he
C. has
D. had
23. ①Three years later he turned _______doctor. C ②Three years became______doctor. B
A. an B. a C. 不填
later
he
D. the
24.①My brother often _____football after school. A
14.① Many students find ______ D difficult to learn. ② Many students find language difficult to learn. A. English
C. the English
C ______
B. an English
D. England
A. so B. such
C. such a
D. quite a
26. ①She often goes to school _______bike. D
②She often _______foot. C
A. in B. at
goes
C. on
to
school
D. by
27. ①More than 70 percent of the population of this country _______ D peasants. ②The population of this country ________ about 13,000,000. C A. has B. have C. is D. are
29. ①All of the apples ______rotten. ②All of the apple ______ rotten. A. are
A
B. is
C. have been
D. has been
D 30.①Do you think _____ John is getting on well with his studies?
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