古希腊神话中有这么一个传说:在古代,动物都没有尾巴,狮子就给大家各分了一条尾巴。其实,这只是古人的想象。
为什么动物有各式各样的尾巴呢?它们的尾巴都是为了生存有利而生成的。
松鼠的尾巴可以让松鼠增加跳跃距离,而且很保险,只有极少数会有意外。松鼠下跳时会张开降落伞似的尾巴,起到平衡和缓冲作用。松鼠睡觉时,会把尾巴盖到身上,这样就像盖了一床被子,十分暖和。松鼠控制尾巴的摆动,以作交流的语言。
狐狸尾巴十分粗壮,毛发尤为蓬松。在冬季,狐狸把自己蜷缩起来,用像围巾的尾巴将自己裹住,可以保暖。狐狸是肉食动物,尾巴可以在它捕食时起到一定的帮助:在狐狸扑向猎物时,可以用尾巴迷惑敌人;狐狸逃跑时,会用尾巴“扫地”,不知不觉就将攻击家禽时留下的血迹“毁尸灭迹”了。
老虎的尾巴也有妙用:可以保持身体平衡。在与敌人搏斗时,老虎会用链条式的尾巴将敌人抽得晕头转向,再发出致命一击。夏天,老虎尾巴可以像牛尾巴那样赶蚊子,在很热的时候,老虎尾巴沾水就能散热。
也许你很奇怪,人为什么不长尾巴呢?科学家们已经有推测了:随着人类进化的发展,大脑越来越灵活,人的尾巴不但没有像松鼠、狐狸、老虎的尾巴那样有很好的作用,反而妨碍人类运动,所以尾巴就慢慢退化了。
My favorite animals are swans.they are white.they can swim very well.I think they look like a beautiful girl in a white dress.they have a pair of wings and they can also fly well.I believe they are angles from the sky.they bring us love and make us happy.they are always friendly to us.We can't hurt them,because they are our friend.I love them!I like dogs,too.they are not beautiful,but they are the best friends.they keep the thieves away.Dogs have the best listening and eyes.they can hear in the nosiy,see in the dark.If we are in danger,they will help us at once.And they don't mind their lives.So,I love them.
Animals are friends of human beings. Most of them are lovely. I like giraffe the most. They are very tall and have many brown spots.
They have very long necks, so that they can eat the leaves in high trees. Giraffes are gentle and lovely. They are friendly to people.
When I go to the zoo, I always look at them. They move slowly. I can’t keep it as a pet, because it’s so huge. It’s a big pity.
I have a big dog ane I love him very much .he has two round black eyes and his sense of hearing is sensitive .His claws are like four plum blossoms .His tail always shakes and looks very cute .In the daytime ,he likes sleepping under the sunshine .But at night ,he is careful and keeps like the doorkeeper guards .He is smart and always eat a lot .He is meek to me but when he meets strangers ,he will bark to them .When I become tired ,he will come and lick my face with his tongue .when I am not busy ,he will play with me .He can give me so much happiness and now I can not leave him .I love my dog because he is one of my family numbers .
Today was Sunday. My parents were free, too. I got up at 7'oclock, because my families planed to go to the zoo. After the breakfast, I took the camera and went to the station together with my parents. It was already 9'oclock when we arrived at the zoo. There were so many monkeys, tigers, lions, wolves and other animals in the zoo. We took many photos in the zoo with the animals. I will show these photos in my class after they were printed. The time passed so fast, we left the zoo at 1'oclock PM. I was so happy today. Now I feel very tired and I will go to bed early tonight.
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