袋鼠的尾巴又粗又长

袋鼠的尾巴又粗又长 袋鼠的尾巴又粗又长，长满肌肉。它既能在袋鼠休息时支撑袋鼠的身体，又能在袋鼠跳跃起帮助袋鼠跳得更快更远。一旦遇到紧急情况，袋鼠在尾巴的帮助下能跳出10米多远。 鹿的尾巴又小又短，然而它却是重要的报警器。当危险带近鹿群时，首先发现敌害的鹿会竖起尾巴，露出下面的亮点，向同伴发出警报。鹿群一接到警报就会马上逃离。 人们常说兔子的尾巴长不了，其实，兔子的短尾巴可以在紧急情况下帮助兔子逃命。当兔子被猛兽咬住时，兔子立刻使用"脱皮计"，将尾巴的"皮套"脱下，从而赢得逃命的刹那间。 鸭嘴兽的尾巴毛茸茸的，并用又粗又壮，里面积蓄着很多很多的脂肪。当冬季来临时，充满脂肪的粗尾巴能帮助它御寒，并提供必需的营养。 草原上奔跑的骏马，尾巴向后飘逸，神气极了。在奔跑时，马的尾巴起了很好的平衡作用。平时马儿又将尾巴当作"苍蝇拍"，左抛右甩地驱赶对它发起攻击的蚊子、牛虻和马蝇. 家鼠的尾巴是爬行的好帮手，可以帮助它沿着墙壁从这儿爬到那儿。家鼠甚至还能用尾巴勾出瓶子中的糖浆或奶油，然后收回尾巴品尝这些美味佳肴。 最有趣的是猴山上的猴子，尾巴是它的"第五只手"。猴子利用尾巴在树上窜来窜去，有时又用尾巴攫取食物。 小松鼠睡觉时用尾巴当作棉被盖在身上; 啄木鸟用凿子样的嘴巴寻觅树干中的害虫时，用结实的尾巴作为重要的支撑物。 最没有用的当数猪尾巴，又短又小，只能作为小摆设而已。 动物尾巴有什么作用 我的学习生涯 2010-04-15 19:52:13 阅读1396 评论1 字号:大中小 订阅 动物的尾巴形形色色，尽管长短粗细不一样，但几乎所有的动物都 有，而且用途也不一样。动物尾巴的主要作用在于: 平衡作用: international, Unicom international market, adapted future people on city of development needs, based Yu industry support, and traffic advantage, and Yangtze River culture, and ecological civilization, advantage, established city development target: radiation absorb Yangtze River upstream chuan Yunnan Guizhou of regional center, and international ecological landscape culture city. 2.3.2 economic development in Yibin city, goal 2020 GDP reached 300 billion yuan, the per capita GDP reached 58000 2030 regional GDP reached 800 billion yuan, the per capita GDP reached 138000. 2020 industrial structure adjustment in Yibin city as 9:56:35; 2030 industrial structure adjustment for the 6:47:47. Industrial output by 2020 of 510 billion yuan in 2030 and reach 1.2 trillion yuan. 2.4 of the urban population and land size 2.4.1 Yibin city, population size according to the different forecasting methods and the size of population environmental capacity check, the downtown main future population projections for the year are as follows: downtown main future population projections for the year (unit: million) forecast methods, 2020, 2030, balancing method for 130-150 table 2.4-1 170-190 ultra high speed development of relationship between economic and labour law development of 150 210 140 180 General develop 130 1.7 million people, resources and environment capacity check land population carrying capacity--280 water resources and population capacity-does not constitute a binding comprehensive prediction of ecological resources coupled--310 results of 140-180 in 2020, the actual resident population of about 1.4 million people; 2030 the actual resident population of about 1.8 million people. 2.4.2 the use of scale, Yibin city 2030 per capita index of urban construction land in the center of 100 square meters per person. Yibin city construction land standards and scale of table table 2.4-2 year population size (mass) land size (km2) land per capita ((km2/people) 2012 82.5 76.19 92.4 2020 140 140 100 2030 2030 Yibin 180 180 100 figure 2.4-1 figure 2.5 land-use planning layout of urban space in central 猫的尾巴使猫在跑跳时能保持平衡，还能使它在肚皮朝天、四脚朝 上、往下落时翻过身来，四脚先着地，不至于摔伤。 袋鼠无论是跑，还是跳，都靠两条后腿，这样就不容易平衡，是尾 巴帮了它的大忙。 猴子、松鼠的尾巴使它在树枝上跳跃时能够保持平衡，从来不会失 足。 马奔驰时尾巴起到很好的平衡作用。 鸟把尾巴当作飞行器。鸟的尾巴上，长着又长又宽的羽毛，这些羽毛展开时好像扇子，能够灵活转动，便于掌握飞行方向。在飞行时，鸟 尾巴起着舵的作用。 保安作用: 穿山甲的尾巴缠在树上，像保险带一样。鳄鱼的尾巴非常有力，像铁棍子一般结实，可当作武器来防御和进攻，一般的野兽如狮和豹都经不起它的一击。水里的河狸遇到危险时，会用尾巴拍水，发出“劈啪”的响声，向同伴报警。牛、马、驴、骡的尾巴用用来驱赶讨厌的苍蝇、蚊 虫和牛虻等。 支撑作用: 啄木鸟在竖直的树干上站着啄食害虫时，尾巴支撑在树皮的裂隙中，从而能够站稳，不至于跌落，可以说尾巴是它的“第三条腿”。袋鼠 的尾巴又粗又长，休息时，尾巴支在地上，成了它的凳子。 international, Unicom international market, adapted future people on city of development needs, based Yu industry support, and traffic advantage, and Yangtze River culture, and ecological civilization, advantage, established city development target: radiation absorb Yangtze River upstream chuan Yunnan Guizhou of regional center, and international ecological landscape culture city. 2.3.2 economic development in Yibin city, goal 2020 GDP reached 300 billion yuan, the per capita GDP reached 58000 2030 regional GDP reached 800 billion yuan, the per capita GDP reached 138000. 2020 industrial structure adjustment in Yibin city as 9:56:35; 2030 industrial structure adjustment for the 6:47:47. Industrial output by 2020 of 510 billion yuan in 2030 and reach 1.2 trillion yuan. 2.4 of the urban population and land size 2.4.1 Yibin city, population size according to the different forecasting methods and the size of population environmental capacity check, the downtown main future population projections for the year are as follows: downtown main future population projections for the year (unit: million) forecast methods, 2020, 2030, balancing method for 130-150 table 2.4-1 170-190 ultra high speed development of relationship between economic and labour law development of 150 210 140 180 General develop 130 1.7 million people, resources and environment capacity check land population carrying capacity--280 water resources and population capacity-does not constitute a binding comprehensive prediction of ecological resources coupled--310 results of 140-180 in 2020, the actual resident population of about 1.4 million people; 2030 the actual resident population of about 1.8 million people. 2.4.2 the use of scale, Yibin city 2030 per capita index of urban construction land in the center of 100 square meters per person. Yibin city construction land standards and scale of table table 2.4-2 year population size (mass) land size (km2) land per capita ((km2/people) 2012 82.5 76.19 92.4 2020 140 140 100 2030 2030 Yibin 180 180 100 figure 2.4-1 figure 2.5 land-use planning layout of urban space in central 保温作用: 像松鼠、狐狸等长着毛茸茸粗尾巴的动物，在寒冷的时候，会把身体缩成一团，然后将大尾巴严严实实地围住身体，犹如围了一条大毛围 巾，天气再冷也不会受冻。 定向和推进作用 鱼类等水生动物的尾巴，不仅可以作为舵来定向，而且还可以上下 或左右摆动作为推进器使用。 示警作用: 鹿的尾巴又小又短，然而它却是重要的报警器。当危险带近鹿群时，首先发现敌害的鹿会竖起尾巴，露出下面的亮点，向同伴发出警报。鹿群一接到警报就会马上逃离。美洲的响尾蛇是一种毒性很强的蛇，其尾巴具有特殊的功能。蛇尾有一条条角质的环纹，这些角质环纹膜围成了一个空腔，当其尾巴晃动时，在空腔内就有气流振动，发出声响。这 声响是用来警告敌人和引诱小动物的一种捕食方法。 逃生作用 兔子的短尾巴可以在紧急情况下帮助兔子逃命。当兔子被猛兽咬住时，兔子立刻使用"脱皮计"，将尾巴的"皮套"脱下，从而赢得逃命的刹那间。蜥蜴和壁虎的尾巴，当遇到敌害时，会自动将尾巴折断留给敌人。尾巴里面有很多神经，还能蹦跳一段时间，起着转移敌害视线的作用， 而自己却可以趁机逃之夭夭。 international, Unicom international market, adapted future people on city of development needs, based Yu industry support, and traffic advantage, and Yangtze River culture, and ecological civilization, advantage, established city development target: radiation absorb Yangtze River upstream chuan Yunnan Guizhou of regional center, and international ecological landscape culture city. 2.3.2 economic development in Yibin city, goal 2020 GDP reached 300 billion yuan, the per capita GDP reached 58000 2030 regional GDP reached 800 billion yuan, the per capita GDP reached 138000. 2020 industrial structure adjustment in Yibin city as 9:56:35; 2030 industrial structure adjustment for the 6:47:47. Industrial output by 2020 of 510 billion yuan in 2030 and reach 1.2 trillion yuan. 2.4 of the urban population and land size 2.4.1 Yibin city, population size according to the different forecasting methods and the size of population environmental capacity check, the downtown main future population projections for the year are as follows: downtown main future population projections for the year (unit: million) forecast methods, 2020, 2030, balancing method for 130-150 table 2.4-1 170-190 ultra high speed development of relationship between economic and labour law development of 150 210 140 180 General develop 130 1.7 million people, resources and environment capacity check land population carrying capacity--280 water resources and population capacity-does not constitute a binding comprehensive prediction of ecological resources coupled--310 results of 140-180 in 2020, the actual resident population of about 1.4 million people; 2030 the actual resident population of about 1.8 million people. 2.4.2 the use of scale, Yibin city 2030 per capita index of urban construction land in the center of 100 square meters per person. Yibin city construction land standards and scale of table table 2.4-2 year population size (mass) land size (km2) land per capita ((km2/people) 2012 82.5 76.19 92.4 2020 140 140 100 2030 2030 Yibin 180 180 100 figure 2.4-1 figure 2.5 land-use planning layout of urban space in central 捕食作用: 蝙蝠白天栖息在较暗的地方，晚上才出来捕捉昆虫。有些蝙蝠，它们的尾巴可以卷缩起来和它的后脚一起拼成成一个吊篮形。这样别的小昆虫就看不出它是蝙蝠了，它依靠这个“隐身秘法”，可以捉到很多昆虫 吃。 攻击作用: 狮、虎、豹的长尾巴是它们的战斗武器之一，在和其他动物搏斗时，只要一摆尾巴，就可以把对方打倒。蝎子的尾巴更厉害，尾端生有钩状而尖锐的毒刺。猎食时，它用脚抓住小动物，然后用尾刺毒杀。尾刺的毒性很强，对呼吸中枢有麻醉作用，对心脏和血管起收缩作用。不管什 么小动物，如果被它的尾刺刺中，很快就会一命呜呼。 能量贮藏作用: 狐猴把尾巴像仓库。在食物丰富的雨季，狐猴就在尾巴里储存起大量营养;在食源缺乏的旱季，狐猴靠消耗尾巴里储备的营养度日。 总之，动物的尾巴有各种各样的用途，对许多动物来说，尾巴的妙 用，给他们提供了更多的生存机会。 儿歌:尾巴的用处 (一) international, Unicom international market, adapted future people on city of development needs, based Yu industry support, and traffic advantage, and Yangtze River culture, and ecological civilization, advantage, established city development target: radiation absorb Yangtze River upstream chuan Yunnan Guizhou of regional center, and international ecological landscape culture city. 2.3.2 economic development in Yibin city, goal 2020 GDP reached 300 billion yuan, the per capita GDP reached 58000 2030 regional GDP reached 800 billion yuan, the per capita GDP reached 138000. 2020 industrial structure adjustment in Yibin city as 9:56:35; 2030 industrial structure adjustment for the 6:47:47. Industrial output by 2020 of 510 billion yuan in 2030 and reach 1.2 trillion yuan. 2.4 of the urban population and land size 2.4.1 Yibin city, population size according to the different forecasting methods and the size of population environmental capacity check, the downtown main future population projections for the year are as follows: downtown main future population projections for the year (unit: million) forecast methods, 2020, 2030, balancing method for 130-150 table 2.4-1 170-190 ultra high speed development of relationship between economic and labour law development of 150 210 140 180 General develop 130 1.7 million people, resources and environment capacity check land population carrying capacity--280 water resources and population capacity-does not constitute a binding comprehensive prediction of ecological resources coupled--310 results of 140-180 in 2020, the actual resident population of about 1.4 million people; 2030 the actual resident population of about 1.8 million people. 2.4.2 the use of scale, Yibin city 2030 per capita index of urban construction land in the center of 100 square meters per person. Yibin city construction land standards and scale of table table 2.4-2 year population size (mass) land size (km2) land per capita ((km2/people) 2012 82.5 76.19 92.4 2020 140 140 100 2030 2030 Yibin 180 180 100 figure 2.4-1 figure 2.5 land-use planning layout of urban space in central 鱼儿的尾巴像船舵，掌握方向好游泳。 燕子的尾巴像剪刀，把握方向保平衡。 啄木鸟的尾巴像铆钉，铆在树上好啄虫。 蝎子的尾巴有毒汁，赶走敌人保自己。 猴子的尾巴像钩子，钩在树上打秋千。 孔雀的尾巴像扇子，五彩缤纷真漂亮。 松鼠的尾巴像把伞，天气炎热好乘凉。 (二) 金鱼尾巴左右摆，游来游去多自在。 牛的尾巴来回摆，苍蝇蚊子不敢来。 小猴尾巴卷树枝，倒着身子往下挂。 燕子尾巴像剪刀，飞行方向把握好。 狐狸尾巴真不小，枕在头下来睡觉。 袋鼠尾巴大又硬，就像一张小板凳。 壁虎被敌人发现了，甩掉尾巴快逃跑 各种动物的尾巴有什么作用 上一篇 / 下一篇 2008-12-11 15:00:29 查看( 147 ) / 评论( 2 ) / 评分( 0 / 0 ) 袋鼠的尾巴又粗又长，长满肌肉。它既能在袋鼠休息时支撑袋鼠的身体，又能在袋鼠跳跃起帮助袋鼠跳得international, Unicom international market, adapted future people on city of development needs, based Yu industry support, and traffic advantage, and Yangtze River culture, and ecological civilization, advantage, established city development target: radiation absorb Yangtze River upstream chuan Yunnan Guizhou of regional center, and international ecological landscape culture city. 2.3.2 economic development in Yibin city, goal 2020 GDP reached 300 billion yuan, the per capita GDP reached 58000 2030 regional GDP reached 800 billion yuan, the per capita GDP reached 138000. 2020 industrial structure adjustment in Yibin city as 9:56:35; 2030 industrial structure adjustment for the 6:47:47. Industrial output by 2020 of 510 billion yuan in 2030 and reach 1.2 trillion yuan. 2.4 of the urban population and land size 2.4.1 Yibin city, population size according to the different forecasting methods and the size of population environmental capacity check, the downtown main future population projections for the year are as follows: downtown main future population projections for the year (unit: million) forecast methods, 2020, 2030, balancing method for 130-150 table 2.4-1 170-190 ultra high speed development of relationship between economic and labour law development of 150 210 140 180 General develop 130 1.7 million people, resources and environment capacity check land population carrying capacity--280 water resources and population capacity-does not constitute a binding comprehensive prediction of ecological resources coupled--310 results of 140-180 in 2020, the actual resident population of about 1.4 million people; 2030 the actual resident population of about 1.8 million people. 2.4.2 the use of scale, Yibin city 2030 per capita index of urban construction land in the center of 100 square meters per person. Yibin city construction land standards and scale of table table 2.4-2 year population size (mass) land size (km2) land per capita ((km2/people) 2012 82.5 76.19 92.4 2020 140 140 100 2030 2030 Yibin 180 180 100 figure 2.4-1 figure 2.5 land-use planning layout of urban space in central 更快更远。一旦遇到紧急情况，袋鼠在尾巴的帮助下能跳出10米多远。 鹿的尾巴又小又短，然而它却是重要的报警器。当危险带近鹿群时，首先发现敌害的鹿会竖起尾巴，露出下面的亮点，向同伴发出警报。鹿群一接到警报就会马上逃离。 人们常说兔子的尾巴长不了，其实，兔子的短尾巴可以在紧急情况下帮助兔子逃命。当兔子被猛兽咬住时，兔子立刻使用"脱皮计"，将尾巴的"皮套"脱下，从而赢得逃命的刹那间。 鸭嘴兽的尾巴毛茸茸的，并用又粗又壮，里面积蓄着很多很多的脂肪。当冬季来临时，充满脂肪的粗尾巴能帮助它御寒，并提供必需的营养。 草原上奔跑的骏马，尾巴向后飘逸，神气极了。在奔跑时，马的尾巴起了很好的平衡作用。平时马儿又将尾巴当作"苍蝇拍"，左抛右甩地驱赶对它发起攻击的蚊子、牛虻和马蝇. 家鼠的尾巴是爬行的好帮手，可以帮助它沿着墙壁从这儿爬到那儿。家鼠甚至还能用尾巴勾出瓶子中的糖浆或奶油，然后收回尾巴品尝这些美味佳肴。 最有趣的是猴山上的猴子，尾巴是它的"第五只手"。猴子利用尾巴在树上窜来窜去，有时又用尾巴攫取食物。 小松鼠睡觉时用尾巴当作棉被盖在身上; 啄木鸟用凿子样的嘴巴寻觅树干中的害虫时，用结实的尾巴作为重要的支撑物。 最没有用的当数猪尾巴，又短又小，只能作为小摆设而已。 壁虎的尾巴，又细又长，壁虎可以用它来自卫。别的动物要捉壁虎时，往往以为揪住或按住壁虎的尾巴就可以捉住它，其实壁虎可以将尾巴脱断，马上逃掉，使要捉它的动物空喜一场。壁虎脱断原有尾巴后，不久还可以再长出一条新尾巴来。 燕子、麻雀、乌鸦等多种鸟类的尾巴，能在飞行时平衡身体、调整速度、改变方向、控制升降，所以称它为“万能的舵”。啄木鸟的尾巴，有点特殊。它很坚硬有力，能支撑着啄木鸟停在树干上啄虫取食，还能帮助啄木鸟攀登树干时保持身体平衡。同时，在啄木鸟飞行时它也可以起到一般鸟尾巴的作用。 骡马的尾巴，由很长的粗毛组成，可以左右甩动。它能驱赶落在骡马身上的蚊、虻和苍蝇。 狗的尾巴能表达喜怒哀乐情感:见到主人来了，它能竖起来，不停地摆动，表示高兴;挨了打时，狗的尾巴就夹起来逃跑，表现出惊慌失措的样子。狗见到生人时，将尾巴耷拉下来，表示愤怒和抗议。 international, Unicom international market, adapted future people on city of development needs, based Yu industry support, and traffic advantage, and Yangtze River culture, and ecological civilization, advantage, established city development target: radiation absorb Yangtze River upstream chuan Yunnan Guizhou of regional center, and international ecological landscape culture city. 2.3.2 economic development in Yibin city, goal 2020 GDP reached 300 billion yuan, the per capita GDP reached 58000 2030 regional GDP reached 800 billion yuan, the per capita GDP reached 138000. 2020 industrial structure adjustment in Yibin city as 9:56:35; 2030 industrial structure adjustment for the 6:47:47. Industrial output by 2020 of 510 billion yuan in 2030 and reach 1.2 trillion yuan. 2.4 of the urban population and land size 2.4.1 Yibin city, population size according to the different forecasting methods and the size of population environmental capacity check, the downtown main future population projections for the year are as follows: downtown main future population projections for the year (unit: million) forecast methods, 2020, 2030, balancing method for 130-150 table 2.4-1 170-190 ultra high speed development of relationship between economic and labour law development of 150 210 140 180 General develop 130 1.7 million people, resources and environment capacity check land population carrying capacity--280 water resources and population capacity-does not constitute a binding comprehensive prediction of ecological resources coupled--310 results of 140-180 in 2020, the actual resident population of about 1.4 million people; 2030 the actual resident population of about 1.8 million people. 2.4.2 the use of scale, Yibin city 2030 per capita index of urban construction land in the center of 100 square meters per person. Yibin city construction land standards and scale of table table 2.4-2 year population size (mass) land size (km2) land per capita ((km2/people) 2012 82.5 76.19 92.4 2020 140 140 100 2030 2030 Yibin 180 180 100 figure 2.4-1 figure 2.5 land-use planning layout of urban space in central 松鼠的尾巴蓬蓬松松，又大又长。松鼠从高处向下跳时，可以减慢降落的速度，使松鼠安全着地，起着降落伞的作用。松鼠睡觉时可以把尾巴当被子盖在身上，也可把尾巴偎在身边，起取暖的作用。 生活在中美洲、南美洲的食蚁兽，遇到下雨或烈日时，竖起尾巴来当伞用，晚上睡觉把尾巴铺在地上当毛毯。 老虎的尾巴，像一条钢鞭，能够抽打。老虎与其他动物搏斗时，尾巴就成了有力的战斗武器。把敌方抽打得晕头转向，不能对它反击。 非洲鳄的尾巴，是有力的捕食工具。一般情况下，非洲鳄静静地卧在河边，一动也不动。一旦猎物靠近了它，便一跃而起，甩动尾巴，一下把猎物扫进水里，然后扑上去咬住吃掉。 蜜蜂的尾巴是叮敌人的武器。 袋鼠的尾巴又粗又长，长满肌肉。它既能在袋鼠休息时支撑袋鼠的身体，又能在袋鼠跳跃起帮助袋鼠跳得更快更远。一旦遇到紧急情况，袋鼠在尾巴的帮助下能跳出10米多远。 鹿的尾巴又小又短，然而它却是重要的报警器。当危险带近鹿群时，首先发现敌害的鹿会竖起尾巴，露出下面的亮点，向同伴发出警报。鹿群一接到警报就会马上逃离。 人们常说兔子的尾巴长不了，其实，兔子的短尾巴可以在紧急情况下帮助兔子逃命。当兔子被猛兽咬住时，兔子立刻使用“脱皮计”，将尾巴的“皮套”脱下，从而赢得逃命的刹那间。 鸭嘴兽的尾巴毛茸茸的，并用又粗又壮，里面积蓄着很多很多的脂肪。当冬季来临时，充满脂肪的粗尾巴能帮助它御寒，并提供必需的营养。 草原上奔跑的骏马，尾巴向后飘逸，神气极了。在奔跑时，马的尾巴起了很好的平衡作用。平时马儿又将尾巴当作“苍蝇拍”，左抛右甩地驱赶对它发起攻击的蚊子、牛虻和马绳家鼠的尾巴是爬行的好帮手，可以帮助它沿着墙壁从这儿爬到那儿。家鼠甚至还能用尾巴勾出瓶子中的糖浆或奶油，然后收回尾巴品尝这些美味佳肴。 最有趣的是猴山上的猴子，尾巴是它的“第五只手”。猴子利用尾巴在树上窜来窜去，有时又用尾巴攫取食物。 动物的尾巴有什么特殊作用 (2004-11-29 16:24:22) 对动物来说，尾巴必不可少。一旦它们失去了尾巴，就会给它们带来许多麻烦和灾难。 游泳用的尾巴鱼的各种游泳动作，是依靠鳍的运动。如果断了胸鳍，鱼就前沉;若把背鳍切除，鱼便后沉。假如把尾巴，即尾鳍割去，鱼便失去方向，不能前进。这说明鱼体是靠尾巴推进转向的。 飞行用的尾巴鸟的尾巴在飞行时起着舵的作用。在短短的鸟尾巴上，丛生着又长又宽的international, Unicom international market, adapted future people on city of development needs, based Yu industry support, and traffic advantage, and Yangtze River culture, and ecological civilization, advantage, established city development target: radiation absorb Yangtze River upstream chuan Yunnan Guizhou of regional center, and international ecological landscape culture city. 2.3.2 economic development in Yibin city, goal 2020 GDP reached 300 billion yuan, the per capita GDP reached 58000 2030 regional GDP reached 800 billion yuan, the per capita GDP reached 138000. 2020 industrial structure adjustment in Yibin city as 9:56:35; 2030 industrial structure adjustment for the 6:47:47. Industrial output by 2020 of 510 billion yuan in 2030 and reach 1.2 trillion yuan. 2.4 of the urban population and land size 2.4.1 Yibin city, population size according to the different forecasting methods and the size of population environmental capacity check, the downtown main future population projections for the year are as follows: downtown main future population projections for the year (unit: million) forecast methods, 2020, 2030, balancing method for 130-150 table 2.4-1 170-190 ultra high speed development of relationship between economic and labour law development of 150 210 140 180 General develop 130 1.7 million people, resources and environment capacity check land population carrying capacity--280 water resources and population capacity-does not constitute a binding comprehensive prediction of ecological resources coupled--310 results of 140-180 in 2020, the actual resident population of about 1.4 million people; 2030 the actual resident population of about 1.8 million people. 2.4.2 the use of scale, Yibin city 2030 per capita index of urban construction land in the center of 100 square meters per person. Yibin city construction land standards and scale of table table 2.4-2 year population size (mass) land size (km2) land per capita ((km2/people) 2012 82.5 76.19 92.4 2020 140 140 100 2030 2030 Yibin 180 180 100 figure 2.4-1 figure 2.5 land-use planning layout of urban space in central 羽毛，展开时好像扇子，能够灵活转向。 平衡用的尾巴在澳洲，袋鼠种类很多，它们都有一条粗壮而有力的尾巴。平时，袋鼠的前肢不落地面，它常用肢和尾巴支撑身体。在跳跃时，尾巴就像“称杆”，以维持身体的平衡。 袭击用的尾巴生活在热带地区的非洲鳄，体长5米，重约1吨，尾巴又长又粗，这是相当危险的“重型武器”。当非洲鳄见到猎物在河边饮水时，只须用尾巴一扫，就把猎物打落水中，然后张开大嘴，饱餐一顿。 警告用的尾巴美洲的响尾蛇是一种毒性很强的蛇，其尾巴具有特殊的功能。蛇尾有一条条角质的环纹，这些角质环纹膜围成了一个空腔，当其尾巴晃动时，在空腔内就有气流振动，发出声响。这声响是用来警告敌人和引诱小动物的一种捕食方法。 捕食用的尾巴蝙蝠白天栖息在较暗的地方，晚上才出来捕捉昆虫。有些蝙蝠，尾巴可以自由卷缩，和后肢之间的皮膜构成一个吊篮形。蝙蝠为什么要装成吊篮形,因为它依靠这个“隐身秘法”，可以捕捉身旁较大的昆虫。 牛的尾巴是驱赶蚊子的，老虎狮子是用来攻击的。兔子的尾巴短不容易被捉，袋鼠的可以增加弹跳力;猎豹的可以保持平衡;松鼠的可以当伞用;蜥蜴的尾巴可以存能量;壁虎的用来自卫;狗的用来表示感情 international, Unicom international market, adapted future people on city of development needs, based Yu industry support, and traffic advantage, and Yangtze River culture, and ecological civilization, advantage, established city development target: radiation absorb Yangtze River upstream chuan Yunnan Guizhou of regional center, and international ecological landscape culture city. 2.3.2 economic development in Yibin city, goal 2020 GDP reached 300 billion yuan, the per capita GDP reached 58000 2030 regional GDP reached 800 billion yuan, the per capita GDP reached 138000. 2020 industrial structure adjustment in Yibin city as 9:56:35; 2030 industrial structure adjustment for the 6:47:47. Industrial output by 2020 of 510 billion yuan in 2030 and reach 1.2 trillion yuan. 2.4 of the urban population and land size 2.4.1 Yibin city, population size according to the different forecasting methods and the size of population environmental capacity check, the downtown main future population projections for the year are as follows: downtown main future population projections for the year (unit: million) forecast methods, 2020, 2030, balancing method for 130-150 table 2.4-1 170-190 ultra high speed development of relationship between economic and labour law development of 150 210 140 180 General develop 130 1.7 million people, resources and environment capacity check land population carrying capacity--280 water resources and population capacity-does not constitute a binding comprehensive prediction of ecological resources coupled--310 results of 140-180 in 2020, the actual resident population of about 1.4 million people; 2030 the actual resident population of about 1.8 million people. 2.4.2 the use of scale, Yibin city 2030 per capita index of urban construction land in the center of 100 square meters per person. Yibin city construction land standards and scale of table table 2.4-2 year population size (mass) land size (km2) land per capita ((km2/people) 2012 82.5 76.19 92.4 2020 140 140 100 2030 2030 Yibin 180 180 100 figure 2.4-1 figure 2.5 land-use planning layout of urban space in central