北极熊是世界上最大的陆地食肉动物，又名白熊。按动物学分类属哺乳纲，熊科。雄性北极熊身长大约240-260cm，体重一般为400-800公斤。北极熊的视力和听力与人类相当，但它们的嗅觉极为灵敏，是犬类的7倍,时速可达60公里,是世界百米冠军的1.5倍。 The polar bear is the world's largest land predato...
北极熊又称白熊，是在北极里生长的熊，它是陆上最庞大的肉食动物。在它生存的空间里，它是食物链最顶层。它拥有极厚的脂肪及毛发来保暖，其白色的外表在雪白的雪地上是良好的保护色，而且它可以在陆上及海上捕捉食物，因此它能在北极这种极严酷的气候里生存.Polar bears, is also called arctic bear...
写濒临危机动物的英语作文北极熊篇一: When the Arctic Ocean freezes over in the autumn, polar bears set off in search of their favorite meals: fatty ringed seals and bearded seals. By the summer, the sea ice begins to melt and break apart. Deprived of access to the tasty seals, polar bea...
北极熊是一个潜在地被威胁的(没危险的) 种类 居住在极地周围北部。他们是不知道界限的动物。他们填塞横跨冰 从俄国到阿拉斯加, 从加拿大到格陵兰和挪威的Svalbard 群岛。充 分人口调查不存在在哪些根据一个全世界人口估计, 而是生物学家 在加拿大使用或许22,000 头到25,000 头熊一个运作的图与大约百 ...
the fate of the polar bear goes beyond a single oil and gas project. If the species are declared threatened, FWS will have responsibilities under the Endangered Species Act to protect the bears from their main danger—in this case, climate change. That means the government could be...
The polar bear (Ursus maritimus) is a bear native largely within the Arctic circle encompassing the Arctic Ocean, its surrounding seas and surrounding land masses. It is the world's largest carnivore species found on land. It is also the largest bear, together with the omnivore ...
这是谁写的 他怎么没写熊喜欢吃什么呀 他应该把熊写的再详细一点
Polar bears live along shores and on sea ice in the icy cold Arctic. When sea ice forms over...