福娃迎迎准备买一只小猫和一只小狗玩具，商店老板没有告诉迎迎玩具的价格，而是给了她下面的信息，请你帮迎迎算一算每只小猫和小

解题思路：由数列{f（n）}的前几项可得，{f（n+1）-f（n）}构成了以4为首项，以4为公差的等差数列，由等差数列
的通项公式得答案．

由题意可知，f（1）=1，f（2）=5，f（3）=13，f（4）=25，…，
∴f（2）-f（1）=4，f（3）-f（2）=8，f（4）-f（3）=12，…，
则{f（n+1）-f（n）}构成了以4为首项，以4为公差的等差数列，
∴f（n+1）-f（n）=4+4（n-1）=4n．
故答案为：4n．

点评：
本题考点： 数列递推式．

考点点评： 本题考查了数列递推式，考查了等差数列的通项公式，解答此题的关键在于明确数列{f（n）}的差构成等差数列，是中档题．

望着眼前五个憨态可掬的福娃，我的心飞向了2008北京奥运。你们这群小精灵孕育于中国五行文化，与奥林匹克五环标志交相辉映，你们是五大洲人与自然融合的产物，你们将给地球村民带来“五福临门”。福娃迎迎是我的最爱，看着你常常会勾起我的万千思绪……深邃的蓝天，飘渺的白云，高昂的雪山，神秘的冰川……青藏高原辽阔而绚丽，它飘忽在人们视野之外，如同一个遥远的梦境，似真，又似幻。迎迎你穿过梦的迷雾，如疾风掠过向着我们跑来——你跑过黄土高原，你为自己有着与黄土一般的肤色而快乐。黄色的高原，亿万年的风沙，纵横交错的沟壑，脚下的这片土地曾经孕育了中华的文明，一条大河从这里流成了我们民族的血脉，流成了九曲十八弯的壮丽风景。百年的秧歌、千载的腰鼓，催着黄皮肤的生灵扬蹄迅跑。你跑向北京，只为了奥运赛场上那一刻的辉煌，我能感觉到你内心的自豪。你是王军霞，1996年亚特兰大奥运会以14分59秒88的成绩夺得女子5000米金牌；你是刘翔，2004年雅典奥运会以12秒91的成绩夺得男子110米栏冠军。五星红旗冉冉升起，我看到了你眼中喜悦的泪水，听见了你心中无言的怒吼。期待着，2008北京奥运赛场上，再一次刮起黄色的旋风，再一次看见你的泪水，再一次听到你的怒吼。你的这一声怒吼，已经埋藏于心中太久太久。你是在为民族的屈辱而吼，可我也听出了你分明又是在为自身的生存而吼，在为索南达杰这些高原的守护神们而吼。凛冽的寒风,漫天的飞沙,厚厚的大衣,脏脏的脸,疲倦的眼神，一次次地令你感动。1994年1月18日，是你心中永远的伤痛。那天，索南达杰为了保护你与你的兄弟姊妹与18名偷猎者展开了枪战,但最终因中弹牺牲了。他至死还紧紧地握着枪,在零下40摄氏度的低温中,被凝固成了一尊冰雪的雕像。你要用吼声唤醒了人们对你们的关注，呼唤人性的回归。迎迎，愿你和你的伙伴，在爱的天空下,在爱的土地上,快乐自由的飞奔吧!奔走在2008的奥运会赛场上,奔向未来……

n×2 ²

f(2)-f(1)=4=1×4, f(3)-f(2)=8=2×4, f(4)-f(3)=3×4,……，猜想 4n.

解题思路：根据已知中图（1）、（2）、（3）、（4）分别包含1个、5个、13个、25个第二十九届北京奥运会吉祥物“福娃迎迎”，我们易分析出第n个图形包含f（n）的值与n的关系，进而得到答案．

设第n个图形包含f（n）个“福娃迎迎”，则f（n）与n的关系为：
当n=1时，f（n）=1=2×1²-2×1+1
当n=2时，f（n）=5=2×2²-2×2+1
当n=3时，f（n）=13=2×3²-2×3+1
当n=4时，f（n）=25=2×4²-2×4+1
…
故f（n）=2n²-2n+1
故答案为：2n²-2n+1

点评：
本题考点： 归纳推理．

考点点评： 本题考查的知识点是归纳推理，其中根据图（1）、（2）、（3）、（4）推断出f（n）的表达式是解答本题的关键．

A total of five mascots,they were:Fuk her Huanhuan,Fuk her Beibei,Fuk her Yingying,Fuk her Jingjing,Fuk her Nini,and these lovely Fook combined happened to be her "Beijing welcomes you" implication.Their prototype from fish,the panda,the Olympic flame,Tibetan antelopes,Jin Yan.
Its color and inspiration from the Olympic rings,and from China's vast mountains and the land,rivers,lakes,sea animals and people's favorite image.Her blessing to the children around the world convey friendship,peace,entrepreneurial spirit and harmony between man and nature in a beautiful desire.The animals are small five lovely intimate partners,and their integration into the shape of the fish,panda,Tibetan antelope,swallow and the Olympic flame image.
The animals represented the dream and desire of the Chinese people.Their headgear contains a prototype and with the sea,forest,fire,earth and sky with its image design of the traditional Chinese art of the performance,displayed the splendid culture of China.For years,the Chinese have adopted the traditional symbols convey blessings.The Beijing Olympic mascot dolls represent each a best wishes:prosperity,happiness,passion,health and good luck.The dolls were warm with Beijing will be taken to every corner of the globe wishing to invite people of all countries copolymerization Beijing to celebrate the 2008 Olympic Festival.
Beibei is the blessings of prosperity transfer.In traditional Chinese culture and the arts,"fish" and "water" logo is a symbol of prosperity and harvest,people use "鲤鱼跳龙门" moral achievements in their career and the realization of dreams,"Fish" There are more than Jiqing,year after year more than the implication.Beibei use of the head decoration of the Chinese neolithic鱼纹pictorial.Beibei gentle and pure,is the master water sports,and the Olympic rings in the Blue Central embraced.
Jingjing is a憨态可掬pandas,regardless of wherever they are brought people joy.As China's national treasure,the Giant Panda won the peoples of the world love.Jingjing from the broad expanse of forest,as a symbol of harmony between man and nature coexist.His head decoration from宋瓷the lotus petals modeling.Jingjing simple and honest optimistic and full of strength,representatives of the Olympic rings in the black part.
Huanhuan is the blessing of her big brother.He is a fire dolls,symbolizing the Olympic flame.Huanhuan is the embodiment of sports passion,he will spread the world of passion,transmission faster,higher and stronger in the Olympic spirit.Huanhuan Wherever he went,filled with Beijing 2008 on the world warm.Huanhuan in the head decoration from the Dunhuang murals flame patterns.His personality outward flowing,people familiar with the various ball games,the Olympic rings in red on behalf of the link.
Yingying is a smart flexible,gallop Ru-fei Tibetan antelope,he came from the western part of the vast land of China,the good blessings of health of the world.Yingying is the Tibetan Plateau unique animal protection Tibetan antelope,the show is green Olympics.Yingying decorative patterns into the head of the Qinghai-Tibet Plateau and the western region of Xinjiang,and other decorative style.He agile,athletic players,representing the Olympic rings in the yellow part.
Nini came from the sky,flying is a Youth Pre-employment Training Swallow,the traditional form of creativity from Beijing Sand Martin Kite."Yan" also on behalf of Yanjing (Beijing's ancient name).Nini joy of the spring and bring people fly过之处deposition,"I wish you good luck," a blessing.The innocent,cheerful矫捷of Nini in the gymnastics competitions in its debut,she represents the Olympic rings in the green part.

1鱼有鳍可以游泳
藏羚羊有健壮的四肢可以奔跑
燕子有翅可以飞翔
2生物环境是指生物与周围物体相互作用形成的环境
1、陆生环境：温差大,水分少、干燥；水生环境：温差小、水分多、湿润
2、陆生动物：具有较厚的表皮,或在表皮表面具有附属物,来阻止水分过度蒸发,并保证温度的相对稳定.
3、陆生生物种类多了,各个类群动物都有陆生种类.你可以看下书啊.
4、蚯蚓属于环节动物,生存在土壤中是因为其避光、土壤较地表温度、湿度稳定.
5、家兔是哺乳动物,结构特征可以参考哺乳动物的一半特征.
6、熊猫繁殖率低,种群数量少.保护对策是加强保护,禁止猎杀,保护生存环境

Beijing 2008:meet the mascots
A cartoon panda and Tibetan antelope（藏羚羊）are the newest Olympic players.They were among five mascots introduced last Friday for the 2008 Summer Games.
The announcement（宣布） was made at a nationwide gala（庆典）,marking the 1,000-day countdown（倒数计时） to the event.
The Five Friendlies
The five mascots are called the Five Friendlies.They are a panda,fish,Tibetan antelope,swallow（燕子） and the Olympic flame（火焰）.Each mascot the color of one of the Olympic rings,they also represent the sea,forests,fire,earth and air.
The Five Friendlies are called “Beibei,” “Jingjing,” “Huanhuan,” “Yingying” and “Nini,” which together mean “Beijing Huanying Ni” or in English – “Welcome to Beijing”.
The Five Friendlies will join the games slogan（口号） “One World,One Dream” and running man symbol which looks like the Chinese character for “capital.”
The Five Friendlies is the most number of mascots any Olympic Games has had in more than 30 years.The Salt Lake City and Sydney Games both had three.

解题思路：自然界中的动物多种多样，动物根据体内脊柱的有无可分为脊椎动物和无脊椎动物，无脊椎动物包括原生生物、腔肠动物、扁形动物、线形动物、环节动物、软体动物和节肢动物，脊椎动物包括鱼类、两栖类、爬行类、鸟类和哺乳类．

（1）福娃贝贝--鲤鱼属于鱼类，感知水流测定方向的结构是侧线．
（2）福娃妮妮--雨燕为鸟类，体内有气囊可以辅助肺进行双重呼吸．
（3）鸟类和哺乳类都属于恒温动物，五个福娃中，熊猫和羊是哺乳动物，体温恒定，生殖方式为胎生哺乳；雨燕是鸟类，体温恒定，生殖方式为卵生．
（4）可可西里自然保护区主要的保护对象是藏羚羊．
（5）世界自然基金会（WWF）会徽和会旗的标志动物是熊猫．
故答案为：（1）侧线．
（2）双重呼吸； 气囊．
（3）熊猫、羊、雨燕； 雨燕．
（4）藏羚羊．
（5）熊猫．

点评：
本题考点： 动物的分类；鱼适于水中生活的形态结构特点和生理特点．

考点点评： 解答此类题目的关键是熟练掌握各种动物的主要特征．