国家地理- 认识北极熊 Polar Bears 每年的2月27日是国际北极熊日，于2011年由北极熊国际协会提倡设立，旨在提醒全社会关注北极熊和它们的栖息地北极。这群可爱的“大白”们其实是最怕热的熊，目前的处境并不太好。随着全球气候变暖，北极地区的海冰面积正大幅萎缩，这对北极熊的生存构成了严重威胁。Polar bear's ...
Polar bears, the largest polar bear species and the largest… How Long Can a Polar Bear Hold Its Breath: Arctic… Polar bears are remarkable Arctic predators, uniquely adapted to life… 12Dec Youth Engagement: Education Project on Polar Bears An educational project has been launched, aiming...
As winter slowly gives way to spring on the edge of the Arctic, polar bear mothers break out of their dens, and get ready for a treacherous 40-mile trek to hunt at sea.北极边缘地区的冬天慢慢退去，春天悄然而至，北极熊妈妈逃离出洞穴，准备进行40英里的艰难跋涉去海上捕食。Finding them in this...
Because of their size—they can weigh up to 1600 pounds--the mighty Polar Bear has no natural predators and lives to be 25 to 30 years old.The Polar Bear is uniquely adapted to live on ice. Not only is its body covered by a heavy coat but its paws are fur-lined both for warmth ...
根据文章最后2行These include finding new energy sources that don’t give off greenhouse gases and not making any more incursions into polar bear’s territory.可知使用不发出温室气体的能源对于保护北极熊也有很大的好处。所以D项内容是正确的。 考点:考查环境保护类短文阅读 反馈 收藏 ...
vegetation, according to the University of Michigan'sAnimal Diversity Web (ADW). However, these are alternative food sources when seals aren't plentiful; seals are crucial to sustaining a polar bear population. Polar bears are top of the food chain and have no natural predators other than ...
Diet formulations should address the bear's nutritional needs, feeding ecology, and individual and natural histories to ensure that species-specific feeding patterns and behaviors are stimulated. In the wild, most bear species are opportunistic omnivores consuming a wide variety of food items depending...
Polar Bear Scientific Name: Ursus maritimus Type: Mammals Diet: Carnivore Average Life Span In The Wild: 25 to 30 years Size: Head and body: 7.25 to 8 feet; tail: 3 to 5 inches Weight: 900 to 1,600 pounds Size relative to a 6-ft man: ...
Polar bears have many names such as Sea Bear, Ice Bear, and Lord of the Arctic. The chosen scientific name, Ursus maritimus literally means maritime bear.
9 RegisterLog in Sign up with one click: Facebook Twitter Google Share on Facebook Pole (redirected frompolar) Dictionary Thesaurus Medical Legal Acronyms Idioms Encyclopedia Wikipedia Related to polar:Polar coordinates,Polar bonds Pole A unit of area equivalent to 1/320th of one square mile. ...