橄榄球是不是球体?

足球.它是脚踢的

乒乓球和足球属于 橄榄球类似椭圆,冰球类似象棋的形状 如果帮助到你,请给个采纳,谢谢您.您的支持是我帮助更多朋友的动力.

Football History —Just What Sport are We Talking About Anyway?
Mention the term “football” and depending on just where you are one of two entirely different games might come to mind.In North America,people will picture a smash-mouth game played by large men wearing pads and helmets on a field with goal posts at each end.The ball is moved down the field by running and passing.In most of the rest of the world “football” means a sport played by shorts-clad men and women on a pitch,or field,with netted goals at each end.It is a game that primarily involves the feet as the ball is kicked up and down the pitch.For the purpose of this article,we will focus on the history of football,american style,the first type mentioned.Association football,or soccer as it’s commonly called,is addressed on a different page on this website.
Has football always been this confusing?In a nutshell,yes.
Soccer,Rugby and More
American Football (let’s make it simple and just call it plain ol’ “football”) has it roots in both soccer and rugby.A form of soccer was played as early as 206 BC in the Han Dynasty of China when teams competed in a game called Tsu Chu to celebrate the emperor’s birthday.The roots of rugby-type games go back to 11th century England when young boys played a tackle game with an inflated cow bladder.This child’s play evolved into violent clashes between men from opposing villages.Hundreds of players from each town would attempt to run the bladder into the middle of the their opponent’s town.Injuries and even death were such a common part of the game that the King of England eventually outlawed the sport.
In 1623,football resurfaced (legally) in England as a soccer-type game played on a field rather than in the town streets.Players were not allowed to touch the ball with anything except their feet.At about the same time,Irish teams took up a form of football that allowed players to hit the ball with their fists.
One of the biggest changes in the game happened at Rugby College in 1823.According to legend,William Ellis suddenly stopped kicking the ball,picked it up and ran down the field and across the goal line.Sure,Ellis had broken one of the fundamental rules of the game,but the crowd loved it.Rugby College recognized that Ellis had a good idea and began allowing players to run with ball.This was the official beginning of rugby and the catalyst for what we know today as football.

The football comes from Britain.

解题思路：根据球体的主要特点：一个曲面结合体育用品的特点作答．球体：乒乓球、足球、篮球、排球、水球； 椭球体：橄榄球；类圆柱体：冰球；羽毛球不是球体．

由球体的主要特点可知，在乒乓球、橄榄球、足球、羽毛球、冰球中，是球体的有乒乓球、足球．
故答案为：乒乓球、足球．

点评：
本题考点： 认识立体图形．

考点点评： 本题考查了球体的定义：空间中到定点的距离等于定长的所有点组成的图形叫做球．

列式：（1）.4足+4橄=696元
（2）.2足+3橄=444元
（1）-（2）得（3）：
2足+1橄=252元
（3）×2得（4）：
2（2足+1橄）=252×2 则
4足+2橄=504元
（1）-（4）得
2橄=192元 则
一个橄榄球=192÷2=96（元）

football在英式英语中译为足球,但在美式英语中译为橄榄球.美式英语中足球为soccer.

地球是,赤道略鼓、两极稍扁的椭圆形.
从这几个水果来看,比较相像的还是橘子.

咱俩的名字很逗啊.
The After-Viewing Impression of Weakness
The story of ordinary people are most impressed. The film Weakness describes a story of the famous American football player Michael Jerome Oher before rising to fame. It reflects the poverty of black and white to help realize the dream of life. Although their skins are different, it still got a harmony.
Ang lee gave micheal a lot of help that woke up his potential, which turned him into a baseball star from a homeless orphan. he finally overcome the difficulties from himself and the puzzles outside and never be unworthy of their expectation.
Looking around, there’re too many "Michael" but the lack of "Ang Lee". So we have to do our best to understand and help "Michael" more. And those friends like Michael, please believe in yourself, work hard,and you will get there.

1.我和他都教英语 He and I both teach English.2.他既教英语,又教法语 He teaches both English and French.3.或者你,或者我,必须告诉他 Either you or I must tell him.4.他不是踢足球,就是打橄榄球 He plays eith...

当然是啦

1：若乒乓球和排球共有14个则乒乓球和排球分别有几个？ 设有x个乒乓球， x+x-8=14 x=11个 14-11=3个 答：有乒乓球11个，排球3个。
2：若橄榄球和羽毛球共有30个则羽毛球有几个？设羽毛球有x个 2x+x=30 x=10个
答：有羽毛球10个。 求采纳

A

15支队分成三组进行比赛,每组5队,即要进行4+3+2+1=10场比赛,所以第一轮共进行了30场；剩下6队,要决出一名冠军,所以要进行5场比赛,因此,一共要进行35场.

不是,有一些的飞行玩具,是低一点的.真正的ufo是特别高的

参阅下面网页：
American football:Information from Answers.com
American football has a pointed oval or vesica piscis shape,and usually ...American football is the most popular spectator sport in the United States.

解题思路：根据球体的主要特点：一个曲面结合体育用品的特点作答．球体：乒乓球、足球、篮球、排球、水球； 椭球体：橄榄球；类圆柱体：冰球；羽毛球不是球体．

由球体的主要特点可知，在乒乓球、橄榄球、足球、羽毛球、冰球中，是球体的有乒乓球、足球．
故答案为：乒乓球、足球．

点评：
本题考点： 认识立体图形．

考点点评： 本题考查了球体的定义：空间中到定点的距离等于定长的所有点组成的图形叫做球．

C

Football History —Just What Sport are We Talking About Anyway?
Mention the term “football” and depending on just where you are one of two entirely different games might come to mind.In North America,people will picture a smash-mouth game played by large men wearing pads and helmets on a field with goal posts at each end.The ball is moved down the field by running and passing.In most of the rest of the world “football” means a sport played by shorts-clad men and women on a pitch,or field,with netted goals at each end.It is a game that primarily involves the feet as the ball is kicked up and down the pitch.For the purpose of this article,we will focus on the history of football,american style,the first type mentioned.Association football,or soccer as it’s commonly called,is addressed on a different page on this website.
Has football always been this confusing?In a nutshell,yes.
Soccer,Rugby and More
American Football (let’s make it simple and just call it plain ol’ “football”) has it roots in both soccer and rugby.A form of soccer was played as early as 206 BC in the Han Dynasty of China when teams competed in a game called Tsu Chu to celebrate the emperor’s birthday.The roots of rugby-type games go back to 11th century England when young boys played a tackle game with an inflated cow bladder.This child’s play evolved into violent clashes between men from opposing villages.Hundreds of players from each town would attempt to run the bladder into the middle of the their opponent’s town.Injuries and even death were such a common part of the game that the King of England eventually outlawed the sport.
In 1623,football resurfaced (legally) in England as a soccer-type game played on a field rather than in the town streets.Players were not allowed to touch the ball with anything except their feet.At about the same time,Irish teams took up a form of football that allowed players to hit the ball with their fists.
One of the biggest changes in the game happened at Rugby College in 1823.According to legend,William Ellis suddenly stopped kicking the ball,picked it up and ran down the field and across the goal line.Sure,Ellis had broken one of the fundamental rules of the game,but the crowd loved it.Rugby College recognized that Ellis had a good idea and began allowing players to run with ball.This was the official beginning of rugby and the catalyst for what we know today as football.

解题思路：根据中间的图可知一个棒球的重量等于一个弹珠和一个网球的重量，把左图中的棒球替换为一个弹珠和一个网球，则就是一个橄榄球和一个弹珠的重量等于2个网球和一个弹珠的重量相等，可知一个橄榄球的重量等于两个网球的重量，把右图中的棒球替换成网球和弹珠，则一个网球和三个弹珠的重量和一个橄榄球的重量相等．可知一个网球和3个弹珠的重量相等，进而可求出一个橄榄球与几个弹珠一样重．据此解答．

根据中间的图和左面的图，把左图中的棒球替换为一个弹珠和一个网球，则就是一个橄榄球和一个弹珠的重量等于2个网球和一个弹珠的重量相等，可知一个橄榄球的重量等于两个网球的重量；
把右图中的棒球替换成网球和弹珠，则一个网球和3个弹珠的重量和一个橄榄球的重量相等．可知一个网球和3个弹珠的重量相等．
所以一个橄榄球与6颗弹珠一样重．
故答案为：6．

点评：
本题考点： 代换问题．

考点点评： 本题主要考查了学生运用替换的方法来解答问题的能力，在用替换的方法来解答此类问题，一定把天平两边放的物体只用两种来进行解答．

a rugby match

正方形的边长为4.橄榄形的面积=2*（4²*π/4-4*4/2）=8π-16 看图后可以发现：橄榄形的一半是1/4圆减去三角形

解题思路：由题意，总共10个球，先考虑选5个位置放篮球，再从剩下的5个位置中选3个位置放排球，共有10种方法，剩下的2个位置放橄榄球，利用乘法原理，即可得出结论．

由题意，总共10个球，先考虑选5个位置放篮球，共有
C510=252种，再从剩下的5个位置中选3个位置放排球，共有10种方法，剩下的2个位置放橄榄球，故共有252×10=2520种．
故答案为：2520．

点评：
本题考点： 计数原理的应用．

考点点评： 本题考查计数原理的应用，考查学生的计算能力，属于基础题．

不属于

亲，五个未知数三个方程，不是我说呀，这却条件吧？

football在美国是美式足球,也就是美式橄榄球,美国人称呼英式足球为soccer
在英国,足球叫footbal,英式橄榄球叫rugby,美式橄榄球叫American football

古筝翻译成koto,是源自于日语.用Chinese ancient zither要准确点.
二胡则用直译的urheen,urhien,urhheen 比较好.
如果是美式橄榄球,则football更常用一些.
气球就是balloon了.

这种问题的关键在于,让一种物品的个数相同,再相减.
针对这一题,足球个数相同更好计算一些.
2个足球和3个橄榄球共444元,那么,
4个足球和6个橄榄球就是888元,与4个足球和4个橄榄球共696元相减,可得2个橄榄球192元,那1个橄榄球就是96元,代入到任一个条件,就可算出足球的价钱.
1个橄榄球=（444*2-696）/2=96
1个足球=（696-96*4）/4=78

当然会有变形了.把一个球面三角形投影到平面上,哪能不变形呢?
注意,这里的变形指得是长度变形,高斯投影是一种正形投影,投影后角度即形状不变,但是长度比是会发生变化的.
具体原理可以参考《地图学》,是通过微分几何来解释的.这里的“投影”其实指一种点到点的映射关系（x,y）=f(X,Y,Z),其中（x,y）是“投影”后的点,（X,Y,Z）是被“投影”的点,而函数 f 则是投影函数,是根据正形投影条件解得的一个复杂的数学表达式,并不能完全当作通常意义下的“投影”.
正是由于有这种变形,为了限制变形量的大小,才采用分带投影的方法,工程中施工地点属于哪一个投影带,就在那个带投影.至于你说的坐标系,是可以通过换带公式对不同投影带之间的点进行转换,使之位于同一坐标系下的.

中间画一条斜线
则求出一半的面积
是1/4元减去直角三角形
即3.14×5×5×1/4-5×5×1/2=7.125平方厘米
所以阴影是7.125×2=14.25平方厘米

I love rugby.

橄榄球（American）（football）
足球（soccer）（football）

M1VI M2V2 M3V3=（M1 M2 M3）V共

请描述一下它的体长、生活方式（成群还是单个）、发现地点,体表特征（覆鳞、甲克还是黏液）,其身体是柔软半透明还是类似昆虫的分节、有硬甲,有几条足.

不是美式英语把橄榄球叫football.而是美国人的football指的是美式足球.和橄榄球(rugby)是两种运动.rugby是不带头盔,和带很少护具的,规则上也有一定的区别.

3.14×10/2×10/2×2-10×10
=157-100
=57平方厘米

足球，其他球都是可以用手来完成的，而足球是用脚

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橄榄球（ 你争我夺）
射箭（ 百步穿杨)
高低杠（参差不齐 )
接力赛跑（前赴后继 ）
举重比赛（ 举重若轻）

696/2=348348/4=87444-5*87=9足球=87-9=78橄榄球=87+9=96/=除 *=乘

7+6-3=10（种）