高三英语理科复习必考知识点概括

2024-07-26

高三英语理科复习必考知识点概括(通用2篇)

高三英语理科复习必考知识点概括 篇1

1.集合:某些指定的对象集在一起成为集合

(1)集合中的对象称元素,若a是集合A的元素,记作 ;若b不是集合A的元素,记作 ;

(2)集合中的元素必须满足:确定性、互异性与无序性;

确定性:设A是一个给定的集合,x是某一个具体对象,则或者是A的元素,或者不是A的元素,两种情况必有一种且只有一种成立;

互异性:一个给定集合中的元素,指属于这个集合的互不相同的个体(对象),因此,同一集合中不应重复出现同一元素;

无序性:集合中不同的元素之间没有地位差异,集合不同于元素的排列顺序无关;

(3)表示一个集合可用列举法、描述法或图示法;

列举法:把集合中的元素一一列举出来,写在大括号内;

描述法:把集合中的元素的公共属性描述出来,写在大括号{}内。

具体方法:在大括号内先写上表示这个集合元素的一般符号及取值(或变化)范围,再画一条竖线,在竖线后写出这个集合中元素所具有的共同特征。

注意:列举法与描述法各有优点,应该根据具体问题确定采用哪种表示法,要注意,一般集合中元素较多或有无限个元素时,不宜采用列举法。

(4)常用数集及其记法:

非负整数集(或自然数集),记作N;

正整数集,记作N_或N+;

整数集,记作Z;

有理数集,记作Q;

实数集,记作R。

高三英语必考语法知识点梳理 篇2

A. As she lost B. Lost C. Losing D. Because of losing

2. ---Mum, why do you always make me eat an egg every day?

---__________ enough protein and nutrition as you are growing up.

A. Get B. Getting C. To get D. To be get

3. --- You should have thanked her before you left.

--- I meant ______, but when I was leaving I couldn’t find her anywhere.

A. to do B. to C. doing D. doing so

4. --- Are you on holiday? --- No, but I’d like _______.

A. to B. be C. to be D. /

5. One of the sides of the board should be painted yellow, and ________.

A. the other is white B. another white C. the other white D. another is white

6. If you go to the Palace Museum, you’ll find the palaces more magnificent than commonly ____.

A. supposing B. supposed C. to suppose D. suppose

7. _________, he can’t educate his own child well.

A. Though a teacher B. A teacher as he is C. Being a teacher D. As he is a teacher

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