大白鲨在水中的时速约为43km/h,某优秀运动员在男子50m自由泳比赛中的成绩是28.81s谁的速度大?

大白鲨

27÷8=3.375倍=3又3/8倍

White shark is a kind of widespread shark,That is because it has an extraodinary capacity which could maintain its body temperature above the ambient temperature and make sure of surviving in deep cold brine.

海马、大白鲨和带鱼水在海中，具有用鳍游泳，用鳃呼吸的特征，属于鱼类；而海豚生活在海水中，具有胎生哺乳的特征，属于哺乳动物，用肺呼吸．
故选：C

海马、大白鲨和带鱼水在海中，具有用鳍游泳，用鳃呼吸的特征，属于鱼类；而海豚生活在海水中，具有胎生哺乳的特征，属于哺乳动物，用肺呼吸．
故选：B

设身长X米
尾长Y米
列：
3+Y=X
Y=3+0.5X
解得
X=12
Y=9
所以
身长是12米

One of the most primitive mammals,it is not yet fully evolved mammals is the largest carnivorous fish,adult jaws average body length between 4-5.9 meters,the average weight of 2000 kg weight 9 tons,length 8 10 meters it can issue 62 different sound,Orcas like living group living is unique to China a giant panda was originally the meat,after the evolution,99% of food is bamboo,but the teeth and digestive tract remain the same,still divided into Carnivora head body length 1200 1800mm,tail length 100 120mm.Body weight 80 120kg,the weight of up to 180kg,is the largest cat in the world extant,northeast tiger body color varies with the seasons,summer hair is brown,winter hair is yellow,swimming
你不知道有个叫百度翻译的东西吗?

全世界各地的海洋中生活着大约350种鲨鱼,它己在我们这个星球上生存了3亿多年.在所有的鲨鱼中,大白鲨个儿最大、最凶猛、最为矫健有力,没有任何海洋动物敢与大白鲨为敌.
生物学家认为,大白鲨可以长到7.61米长,寿命达20年.刚生下来的大白鲨幼鱼约1.06米,出生的当天就会自己捕食.雌大白鲨成年时长4.84米,体重达1360-2721千克.渔民因渔网被凶悍的大白鲨撞破扯烂而一无所获的事时有发生.
大白鲨是典型的肉食动物.幼小的大白鲨捕食鱼类,身体长到2.74—3.65米时,转而 捕食海洋中比鱼类个子大的海豹、海狮之类的哺乳动物.捕食时,大白鲨往往先在猎物四周慢吞吞地游来游去兜圈子；然后悄然沉下海底,将身子隐蔽在礁石之间.觑准时机,猛然闪电般向上直扑猎物的腹部或尾部,刀锋似的利齿将猎物咬成几块,三口两口就把猎物吞进了肚里.
大白鲨的表皮覆盖着一排排叫做真皮齿的尖利鳞片,每个鳞片犹如一粒细小的利牙,鱼皮表面像砂纸那般粗硬.高速游动的大白鲨如果擦碰到人体,人的肌肤会被割划得皮开肉绽.
大白鲨的体温比周围水温高6℃.据科学测算,肌肉温度每提高5℃,肌肉的收缩力便增加2倍.这是大白鲨反应神速、肌肉爆发力强大的主要原因.
大白鲨的鼻孔上边有一系列感觉小孔,这些小孔能 (灵巧、灵敏、灵活)地探测到猎物发出的微弱电磁场,因此大白鲨能百发百中捕获猎物.通过鼻上小孔,大白鲨还能依据地球电磁场,在漆黑一片的海底游动时丝 毫不差地把准方向.大白鲨游动时,将上下颚收缩在鼻子下边,使头部成流线型,以减少水的阻力.
大白鲨是海洋生物链中必不可少的一环,它起着控制海洋中某些哺乳动物数量的作用,吃掉其中的老弱病残者,促进生存竞争.另外,大白鲨还吞食海洋中的动物尸 体,清洁海洋.可惜的是,体态优美的大白鲨由于受到误解,被人类大量捕杀,数量急剧减少,现在已被世界动物保护组织列入了濒危动物名单.

其实你说的这个比较不在一个级别的,而是一头饿狼和一只猛虎的意思.
因为虎鲸是一种大型齿鲸,成年身长为8～10米,体重9吨左右.
而大白鲨最大也就6.4米/2500公斤,再大也大不过虎鲸.
就好像一个重量级拳击手和一个轻量级拳击手对打一样（当然,随便找一个拳手打我们普通人是没问题的）
还有就是虎鲸喜欢群居的生活,有2-3只的小群,也有40-50只的大群,你想想,这么一群庞然大物在海中浩浩荡荡的游过,别说一只大白鲨（大白鲨喜欢独居）,就是一群大白鲨也是白给,

There are nearly 400 different types of sharks, but only about 30 types have ever been reported as attacking human beings.Most people know that the most dangerous shark is the great white shark,mainly because they have seen the movie'jaws".However there are still two other sharks which are fierce.They are the tiger sharks and the bull sharks.
The changes of being attacked by a shark are very small compared to other dangers .Many more people drown in the ocean every year than are bitten by sharks.The low number of attacks that happen every year prooves that sharks do not feed on humans if they have the choice.
There are three types of shark attacks.The main one is known as a "hit and run".The sharks attacks,because it thinks you are a fish,but when it tastes a human it decides not to eat you.The second type is called a :bump and bite".The shark bumps you to find out if you are fit to be eaten andd then bites you if it thinks you are.The third type is called a "sneak".
when attacking in this way,the shark waits for you to swim by and attacks you suddenly. The latter two types of attack are more likely to deadly for humans.
However,you chances of being attacked by a shark can be reduced if you follow the advice below.
Do not swim in the dark.Sharks can still see you but you cannot see them.
Do not swim if you are cut or if you have a fresh wound.Sharks can smell blood over a long distance.
Do not wear bright clothing or jewellery because sharks are attracted to colours and shiny objects.
Try and stay in groups,as sharks usually avoid large numbers of people.
Recently,shark attacks have been increasing as water sporta are becoming more popnlar.If a shark attacks you,try some of the following tips to help you.
Do not panic.
Hit the shark on the nose.
Stick your finger in the shark`s eye.
Don`t be frightened by sharks as there is 30 times greater chance of being hit by lightning than being attacked by a shark.

1）大白鲨无法猎杀成年的鲸鲨；
2）而鲸鲨本身和须鲸类似,只能吃一些小虾之类的东西,因此不可能把大白鲨当作食物.

是虎鲸
虎鲸是一种大型齿鲸,身长为8～10米,体重9吨左右,背呈黑色,腹为灰白色,有一个尖尖的背鳍,背鳍弯曲长达1米,嘴巴细长,牙齿锋利,性情凶猛,食肉动物,善于进攻猎物,是企鹅、海豹等动物的天敌.有时它们还袭击其它鲸类,甚至是大白鲨,可称得上是海上霸王.

140:2=x：5
x=350千米

1
140*5/2=350千米
每小时140/2＝70
5小时＝70*5＝350
2
20*12/16＝15行
共有20*12＝240人
16人1行站 340/16＝15行

Many sharks including great white shark,mouth have rows of Lichi.As long as the front teeth due to the consumption falling out of the rear teeth will be replaced.New teeth than the old teeth greater and more durable.The angle sharks and shark spine angle,such as shark teeth will be the replacement of the entire row.Shark teeth were serrated,so that not only can it bite shark prey,but also can be effectively cut them broken.
The great white shark on the head and jaw had not closely linked.
The great white shark on the head and jaw had not closely linked,it can be extended forward and upward maxillary swallow their prey,and sometimes one can swallow prey.

1．灵敏 2．可能长到7．61米长 3．比喻 形象生动说明鳞片的锋利和粗硬 4．(1)隐蔽自身 （2)准确地攻击 5．以为它只会伤害人的生命,带有攻击性 6．列数字

大白鲨
A Great White Shark decides to make the small beach resort town of Amity his private feeding grounds.This greatly frustrates the town police chief who wants to close the beaches to chase the shark away.He is thwarted in his efforts by the town's mayor who finally relents when nothing else seems to work and the chief,a scientist,and an old fisherman with revenge on his mind take to the sea to kill the beast.
变人不知道是哪个片.楼主说得是不是变脸啊
变脸
FBI Special Agent Sean Archer tries to find a biological weapon placed in Los Angeles by a sadistic terrorist-for-hire and criminal mastermind named Castor Troy.Archer has hunted Troy for the last 8 years,and is consumed by revenge because Troy is responsible for the death of Archer's son.To do this,Archer must "borrow" Troy's face using a surgical procedure to go undercover as Troy,but things go wrong when Troy assumes the identity of Archer.
侏罗纪公园
Huge advancements in scientific technology have been able to create an island full of living dinosaurs.John Hammond have invited four individuals,plus his two grandchildren to join him at Jurassic Park.But will everything go to plan?Especially when one of the parks own workers attempt to steal the dinosaurs embryos,and have to shut down all the electricity in the process.It's now a race for survival with everyone located all over the island.

虎鲸是最大的海豚,成年个头9米多,大白鲨成年才6米,无论力量与智力虎鲸占很大优势,至于虎鲨,它个头力量比起大白鲨比差上一截,更没法与虎鲸比了,排名是:虎鲨

鲸鲨是世界上体型最大的鱼类

你说的是类似《侏罗纪公园》这样的类灾难片是吧 比如《大白鲨》《食人鱼》《狂蟒之灾》系列《哥斯拉》《近蛛者杀》《空中蛇灾》 《金刚》《人猿星球》系列 这样的很多啊 一、蟒蛇类 空中蛇灾(Snakes on a Plane)…毒蛇登航班,高空显惊魂 狂蟒之灾(Anaconda )1、2…热带丛林里的巨型蟒蛇 夺命蟒蛇(Daai se wong)…巨型大蟒蛇,早期类似《金刚》的电影 大蛇对大蟒(Boa vs.Python)…一条大蛇从实验室逃亡潜入城市下水道,造成市民恐慌 灵蛇舞(snake man)…南美亚马逊森林中守护神秘长生部落的巨蟒 蛇岛(Snake Island)…一群度假者抵达蛇岛,他们马上发现假期结束了!眼镜王蛇(King Cobra)…一次不当的实验后,大蟒蛇悄悄地来到并逐一吞食菲尔摩小镇的居民 冷刀锋(Silent Predators)…建筑工地唤醒了地下成群的响尾蛇 巨蟒出击(Rattled)…数百条响尾蛇的巢穴意外被毁,它们将伊甸谷小镇作为新家园 人蛇大战…少见的台湾生物灾难电影 二、蜘蛛类 八脚怪(Eight Legged Freaks)…巨型蜘蛛肆虐美国小镇 天蛛地灭(Spiders) 天蛛地灭2/狂莽蛛灾(Spiders II:Breeding Ground)…美国太空实验不慎,蜘蛛发生DNA突变 突出虫围(Arachnid)…巨型蜘蛛盘踞孤岛,人类注定无处可逃 小魔煞(Arachnophobia)…一只来自丛林的特种蜘蛛来到小镇繁衍后代,最终酿成灾难 冰冻蜘蛛(Ice Spiders)…雪山实验室发生事故,变异蜘蛛以人为食 三、苍蝇类 苍蝇I(The FlyI) 苍蝇II(The FlyII)…极度恶心的人和苍蝇混合怪物 四、海底章鱼 极度深寒(Deep Rising)…深海大章鱼血洗游轮 史前大章鱼(Octopus)…美国潜艇遭遇大海怪侵袭 章鱼之东河惊魂(Octopus 2:River of Fear)…大章鱼入侵纽约,毁灭自由女神像 北海巨妖(Kraken:Tentacles of the Deep)……儿子追寻大章鱼为父复仇 五、海底鲨鱼 大白鲨系列(Jaws)…斯皮尔博格成名作品 水深火热(Deep Blue Sea)…科学实验创造智慧杀人鲨鱼 变种鲨鱼人(Hammerhead:Shark Frenzy) 史前狂鲨(Megalodon) 怒海狂鲨(Raging Sharks) 水深火热之生化狂鲨(Shark Attack) 大白鲨之致命武器(Dark Waters)…变异鲨鱼 颤栗汪洋(Open Water) 血海食人鲨(Blue Water,White Death) 新大白鲨(Cruel Jaws)…鲨鱼,还是食人鲨鱼 六、鳄鱼类 惊世巨鳄(Crocodile)1、2 史前巨鳄(Lac Placid)1、2 夺命大鳄鱼…(Killer Crocodile)…大鳄鱼 万鳄巨兽(Primeval)…种族大屠杀,巨型大鳄鱼,人和动物哪个更可怕 黑水(Black Water)…一个在澳大利亚北部鳄鱼栖息的红树林沼泽的可怕故事 嗜血狂鳄(Croc)……一条活动于泰国某地对游客及当地居民生命造成巨大威胁的鳄鱼 七、蜂类 杀人蜂(The Swarm)…小小蜜蜂变异攻击人类,令人不寒而栗 狂蜂暴(Deadly Swarm)…荒凉的墨西哥小镇,一群黄蜂妄图摧毁人类性命 蜂魔(Swarmed)…铺天盖地的胡蜂追杀人类 八、恐龙类 雷克斯暴龙(Carnosaur)…一位生物学家改变鸡蛋基因创造出硕大而残暴的恐龙,放逐在偏远小镇 侏罗纪公园(Jurassic Park)1、2、3…六千万年恐龙重现地球 哥斯拉(Godzilla)…法国核试验造就变异巨型蜥蜴,又是倒霉的纽约城 八、其他类 异形魔怪(Tremors)1、2、3、4…游走、隐藏与地下的未知怪兽 魔窟(The Cave) 黑暗侵袭(The Descent)…深藏在黑暗洞窟中亿万年不见天日的未知生物 蜈蚣(Centipede!)…深藏在黑暗洞窟中的变异蜈蚣,情节类似《黑暗侵袭》 蝗虫大军：天降灾难(Locusts:The 8th Plague)…利用基因改造的蝗虫从美国一绝密研究机构逃脱 军刀牙(Sabretooth)…科学家克隆的剑齿虎出逃实验室并猎食人类 从地心拦截(DeepStar Six)…美国海军深海实验室受到前所未有的外来不明物体侵入 惊爆无底洞

4369斤,这是以知并测量过的

只要地球上活的,天上飞的,地上跑的,水里游的, 没有没被捕杀过的

1、灵敏
2、比喻 形象生动说明鳞片的锋利和粗硬
3、吃掉比较弱的动物
4、列数字
5、以为它只会伤害人的生命,带有攻击性

是不好的行为.打破了自然生态平衡.

身长=头长+尾长=3+尾长
尾长=（头长+身长）÷2=（3+3+尾长）÷2
也就是：
2×尾长=3+3+尾长
所以
尾长=3+3=6
身长就是：3+6=9

没有准确的答案.也许还有更大的,但迄今最长的有七八米.

提供一篇大白鲨影评，英文，133单词，见附件。***********************本回答只提供了英文影评，没有提供视频下载，不违反知道规范，请管理员放行。

蓝鲸被认为是地球上生存过的体型最大的动物,长可达33米,重达181吨.
大白鲨身长约6.4米,重约3吨.
体长是5倍,体重是60倍.