2021年初三期末数学复习知识点（六）
2021年初三期末数学复习知识点（六）！我们好好学习的目的，就是为了使我们的生活过得更好，使我们的国家更加繁荣富强。下面小编为大家整理了2021年初三期末数学复习知识点（六），供同学们学习参考。
重点短语
Welcome to the unit
1. take/have a rest休息
2.wake me/him up叫醒我/他 （代词宾格放中间）
3.plan to travel around China打算环游中国
4.wonderful places to go（不定式做后置定语)可去的好地方
5.a kind of traditional Chinese art一种传统的中国艺术
Reading
1. the Capital of… …的首都
2. .in the middle of… 在……中间
3. used to live there过去住那儿
4. turn…into把……变成
be turned into… 被变成
5.watch the raising of the national flag看升旗
6.a large Chinese garden set in a natural landscape以自然风景为背景的大型中国园林
7.a nice place for emperors to spend the summer供皇帝们度假的好地方
8.another famous attraction另一个有名的景区
9. every few hundred metres每隔几百米
10.stand in different shapes以不同的形状耸立
11.lie on/in/to位于(接壤/包含/分离)
12.in southern China=in the south of China在中国的南部
13.take a boat trip乘船旅行
14.hire a bicycle租自行车
Grammar
1.take up占用，占据
2.three quarters of… ……的四分之三
3.row a boat划船
4.a 17-hole bridge一座17孔桥
5.on either side of it =on both sides of it =on each side of it在两边
6.be wellworth visiting=be well worth a visit=be well worth going to非常值得参观
7.on a sunny day在晴朗的一天
8.arrive in Shanghai=reach Shanghai=get to Shanghai到达上海
get to our hotel
9.public transport公关交通
10.interesting places有趣的地方/ places of interest名胜
Integrated Skills
1.an ancient city of culture文化古城
2.take a tour of… 在…旅行
3.leave for… 出发去…
4.five million people五百万人millions of people数百万人
Task
1.as a second language作为第二语言
2.iron and steel industry钢铁业
3.communicate with the local people与当地人交流
4.its capital city它的首都城市
重点句子
1.It’s tiring to climb the steps, and my feethurt.
2.With wonderful buildings and art treasuresinside, itis wellworth a visit..
3.Many tourists like to gather thereearly to watch the raising the national flag.
4.Itruns for over 6000 kilometresacross northern China,with watchtowers every few hundred metres.
5.East or west, Guilin landscape is best.
6.Itlies on the two sides of the Lijiang River.
7.In this underground cave,it isamazing thatthere areso many rocks in unusual shapes—somehang down, and otherspoint upwards.
8.The caveis praised as the‘Art Palace of Nature’.
9.As an old saying goes,’’He who has never been to the Great Wall is not a true man.’
10.Across the lake is a 17-hole bridge.
11.There are many stone lionson either side ofit.
12.Japan is the second country we are going to visit in Asia.
重点短语
Welcome to the unit
1. take/have a rest休息
2.wake me/him up叫醒我/他 （代词宾格放中间）
3.plan to travel around China打算环游中国
4.wonderful places to go（不定式做后置定语)可去的好地方
5.a kind of traditional Chinese art一种传统的中国艺术
Reading
1. the Capital of… …的首都
2. .in the middle of… 在……中间
3. used to live there过去住那儿
4. turn…into把……变成
be turned into… 被变成
5.watch the raising of the national flag看升旗
6.a large Chinese garden set in a natural landscape以自然风景为背景的大型中国园林
7.a nice place for emperors to spend the summer供皇帝们度假的好地方
8.another famous attraction另一个有名的景区
9. every few hundred metres每隔几百米
10.stand in different shapes以不同的形状耸立
11.lie on/in/to位于(接壤/包含/分离)
12.in southern China=in the south of China在中国的南部
13.take a boat trip乘船旅行
14.hire a bicycle租自行车
Grammar
1.take up占用，占据
2.three quarters of… ……的四分之三
3.row a boat划船
4.a 17-hole bridge一座17孔桥
5.on either side of it =on both sides of it =on each side of it在两边
6.be wellworth visiting=be well worth a visit=be well worth going to非常值得参观
7.on a sunny day在晴朗的一天
8.arrive in Shanghai=reach Shanghai=get to Shanghai到达上海
get to our hotel
9.public transport公关交通
10.interesting places有趣的地方/ places of interest名胜
Integrated Skills
1.an ancient city of culture文化古城
2.take a tour of… 在…旅行
3.leave for… 出发去…
4.five million people五百万人millions of people数百万人
Task
1.as a second language作为第二语言
2.iron and steel industry钢铁业
3.communicate with the local people与当地人交流
4.its capital city它的首都城市
重点句子
1.It’s tiring to climb the steps, and my feethurt.
2.With wonderful buildings and art treasuresinside, itis wellworth a visit..
3.Many tourists like to gather thereearly to watch the raising the national flag.
4.Itruns for over 6000 kilometresacross northern China,with watchtowers every few hundred metres.
5.East or west, Guilin landscape is best.
6.Itlies on the two sides of the Lijiang River.
7.In this underground cave,it isamazing thatthere areso many rocks in unusual shapes—somehang down, and otherspoint upwards.
8.The caveis praised as the‘Art Palace of Nature’.
9.As an old saying goes,’’He who has never been to the Great Wall is not a true man.’
10.Across the lake is a 17-hole bridge.
11.There are many stone lionson either side ofit.
12.Japan is the second country we are going to visit in Asia.
重点短语
Welcome to the unit
1. take/have a rest休息
2.wake me/him up叫醒我/他 （代词宾格放中间）
3.plan to travel around China打算环游中国
4.wonderful places to go（不定式做后置定语)可去的好地方
5.a kind of traditional Chinese art一种传统的中国艺术
Reading
1. the Capital of… …的首都
2. .in the middle of… 在……中间
3. used to live there过去住那儿
4. turn…into把……变成
be turned into… 被变成
5.watch the raising of the national flag看升旗
6.a large Chinese garden set in a natural landscape以自然风景为背景的大型中国园林
7.a nice place for emperors to spend the summer供皇帝们度假的好地方
8.another famous attraction另一个有名的景区
9. every few hundred metres每隔几百米
10.stand in different shapes以不同的形状耸立
11.lie on/in/to位于(接壤/包含/分离)
12.in southern China=in the south of China在中国的南部
13.take a boat trip乘船旅行
14.hire a bicycle租自行车
Grammar
1.take up占用，占据
2.three quarters of… ……的四分之三
3.row a boat划船
4.a 17-hole bridge一座17孔桥
5.on either side of it =on both sides of it =on each side of it在两边
6.be wellworth visiting=be well worth a visit=be well worth going to非常值得参观
7.on a sunny day在晴朗的一天
8.arrive in Shanghai=reach Shanghai=get to Shanghai到达上海
get to our hotel
9.public transport公关交通
10.interesting places有趣的地方/ places of interest名胜
Integrated Skills
1.an ancient city of culture文化古城
2.take a tour of… 在…旅行
3.leave for… 出发去…
4.five million people五百万人millions of people数百万人
Task
1.as a second language作为第二语言
2.iron and steel industry钢铁业
3.communicate with the local people与当地人交流
4.its capital city它的首都城市
重点句子
1.It’s tiring to climb the steps, and my feethurt.
2.With wonderful buildings and art treasuresinside, itis wellworth a visit..
3.Many tourists like to gather thereearly to watch the raising the national flag.
4.Itruns for over 6000 kilometresacross northern China,with watchtowers every few hundred metres.
5.East or west, Guilin landscape is best.
6.Itlies on the two sides of the Lijiang River.
7.In this underground cave,it isamazing thatthere areso many rocks in unusual shapes—somehang down, and otherspoint upwards.
8.The caveis praised as the‘Art Palace of Nature’.
9.As an old saying goes,’’He who has never been to the Great Wall is not a true man.’
10.Across the lake is a 17-hole bridge.
11.There are many stone lionson either side ofit.
12.Japan is the second country we are going to visit in Asia.
直线与圆的位置关系
1. 直线和圆相交、相切相离的定义:
(1)相交: 直线与圆有两个公共点时,叫做直线和圆相交,这时直线叫做圆的割线.
(2)相切: 直线和圆有惟一公共点时,叫做直线和圆相切,这时直线叫做圆的切线,惟一的公共点做切点.
(3)相离: 直线和圆没有公共点时,叫做直线和圆相离.
2. 直线与圆的位置关系的数量特征:
设⊙O的半径为r，圆心O到直线的距离为d；
①d<R style="PADDING-BOTTOM: 0px; PADDING-TOP: 0px; PADDING-LEFT: 0px; MARGIN: 0px; PADDING-RIGHT: 0px" <="==">直线L和⊙O相交.②d=r<===>直线L和⊙O相切.③d>r <===>直线L和⊙O相离.
3. 切线的总判定定理: 经过半径的外端并且垂直于这个条半径的直线是圆的切线.
4. 切线的性质定理: 圆的切线垂直于过切点的半径.
推论1 经过圆心且垂直于切线的直线必经过切点.
推论2 经过切点且垂直于切线的直线必经过圆心.
分析性质定理及两个推论的条件和结论间的关系,可得如下结论:
如果一条直线具备下列三个条件中的任意两个,就可推出第三个.
①垂直于切线; ②过切点; ③过圆心.
5. 三角形的内切圆、内心、圆的外切三角形的概念.
和三角形各边都相切的圆叫做三角形的内切圆,内切圆的圆心叫做三角形的内心, 这个三角形叫做圆的外切三角形.
6. 三角形内心的性质:
(1)三角形的内心到三边的距离相等. (2)过三角形顶点和内心的射线平分三角形的内角.
由此性质引出一条重要的辅助线: 连接内心和三角形的顶点,该线平分三角形的这个内角.
以上是小编为大家整理的2021年初三期末数学复习知识点（六），希望能够帮助到大家。另外，同学们还有什么问题，欢迎请拨打电话
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- 2021年初三期末数学复习知识点（五）2021-05-30
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