题目
美式足球介绍 英文
全英的,美式足球的特点.
全英的,美式足球的特点.
提问时间:2020-10-24
答案
American Football is a tough contact sport that dominates the American sporting scene and is gaining popularity in Europe.It is a game requiring all-round physical fitness.Players have to be fast,strong,and proficient in the six basic skills of football:passing,catching,running,blocking,tackling,and kicking.American football has always been associated with a large number of injuries,not surprising when the game commonly involves players in excess of 240 pounds colliding with each other at full speed.In the United States,it is estimated that more than 300 000 high school players,35 000 college players,and half of the National Football League players are injured to some extent each season.Head and neck injuries are common:there are approximately 250 000 incidents of concussion each year.Some injuries have been fatal or have resulted in players becoming permanent quadriplegics.However,the number of very severe injuries has declined in recent years.This is probably due to rule changes concerning tackling and blocking with the head,and improvements in protective equipment which were introduced in 1976.There has also been a greater emphasis in training on strengthening the muscles of the neck and learning good tackling techniques.This is particularly important in the younger age group.
Protective clothing is an essential feature of modern football,but this makes the players vulnerable to heat stroke.One study reported 12 heat stroke deaths among college and high school football players over a three year period.The victims were all interior linemen,probably the players required to work hardest and longest; most were stricken during pre-season practice so they may have been in poor physical condition; all were dressed in full uniforms which increases workload and interferes with heat loss; and most were not permitted to drink water during practice.Clearly,it is essential that players and officials should be aware of the risk of heat stroke,and ensure that drinking water is available during practice and games.
Protective clothing is an essential feature of modern football,but this makes the players vulnerable to heat stroke.One study reported 12 heat stroke deaths among college and high school football players over a three year period.The victims were all interior linemen,probably the players required to work hardest and longest; most were stricken during pre-season practice so they may have been in poor physical condition; all were dressed in full uniforms which increases workload and interferes with heat loss; and most were not permitted to drink water during practice.Clearly,it is essential that players and officials should be aware of the risk of heat stroke,and ensure that drinking water is available during practice and games.
举一反三
已知函数f(x)=x,g(x)=alnx,a∈R.若曲线y=f(x)与曲线y=g(x)相交,且在交点处有相同的切线,求a的值和该切线方程.
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
奥巴马演讲不用看稿子.为什么中国领导演讲要看?
想找英语初三上学期的首字母填空练习……
英语翻译
最新试题
- 1写出下列英语单词.猫( ) 狗( )
- 2设全集I={1,2,3,4,5,6},集合M={1,6},N={3,4,6},求(CiM)∩(CiN)
- 3She is ill in the ________
- 4a除b=9,a:b=():() 姜为五分之四小时走3千米,路程和时间的比是(),比值是(),这个比值表示( ).
- 5What______to see all of you here!A,surprise B,a surprise C,surprising D,surprises
- 6微生物分解有机物为什么需要氧气?
- 7用一条彩带捆扎一种礼盒(如图)如果接头处长30cm求这条彩带的长度如题
- 8甲乙两块石头,大小不同,石质相同.甲石头的质量是1.5千克,体积是4立方分米.乙石头质量是18千克,体积
- 9吾之心皆属于尔之矣,则人亦子之矣,汝何敢会?为嫌乎? 求解翻译,大神help ,快
- 10柳树发芽了的作文,我们老师说只要一小段描写柳树发芽了的情景就可以,一共要300-400字
热门考点