crab冒泡.........很高兴图

http://www.google.com/imgres?imgurl=http://i208.photobucket.com/albums/bb177/janicelife888/980201/P1180838-3.jpg&imgrefurl=http://janicelife.pixnet.net/blog/post/24557193&usg=__la4rfE3FwPRKTZXFrhZl2Y7SiXA=&h=323&w=430&sz=51&hl=zh-TW&start=104&zoom=1&tbnid=Creji3UpTGuRfM:&tbnh=141&tbnw=181&prev=/images%3Fq%3D%25E5%2586%2592%25E6%25B3%25A1%26um%3D1%26hl%3Dzh-TW%26sa%3DN%26biw%3D921%26bih%3D462%26tbs%3Disch:1&um=1&itbs=1&iact=rc&dur=514&ei=AoIBTYKIHKeKnAf1obTlDQ&oei=ooEBTaXEN4H48AarmujoAg&esq=18&page=14&ndsp=8&ved=1t:429,r:7,s:104&tx=118&ty=74