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教育/科学 >> 科学技术 问题描述: ``````无语解析: 在北极，这世上最荒凉的地方，居住着北极熊。高山环抱的辽阔冰面、冰川和白雪覆盖的海岸，是北极熊活动的地域。海冰在春天融解，在夏天成为浮冰，这里所有动物的活动都要靠冰进行。冰、空气、水构成海豹生活的空间，再下面是白鲸的世界。北极熊的狩猎场极其辽阔，所以它们不停迁移，每年要在移动的冰面上走五千英里。一只母熊生了一个宝宝，这只幼熊还是第一次接触外面的世界。冰面上是摄氏零下六十度，洞穴内是两三摄氏度，幼熊在洞穴里出生，靠喝母乳已生活了三个月，今后两年它要跟着母亲学习北极熊的生存之道。幼熊跟着母亲在冰上狩猎是很危险的，因为公熊只当幼熊是食物。冰块撞击会形成冰脊，母熊来到冰脊附近的脆弱地带，靠嗅觉找到冰缝附近透出的气味，每年这个时候，海豹都会藏身在这冰下。像其他海洋哺乳动物一样，海豹需要定时呼吸，它们会从薄冰下用利爪钻一个只够鼻子呼吸的直径一寸左右的洞，但就是这个洞暴露了它们。母熊沿冰缝追踪，从一个洞口嗅到另一个洞口。四月，海豹会在冰上和陆上生产，然后，把幼豹藏在冰上雪下的隐藏处，还准备有通往大海的逃生通道。但它们的气味会渐渐穿过冰的晶体，渗出去，熊逆风而行，来到海豹的窝，捕杀了一头小海豹，这只够母熊一天的消耗。北极危险重重，天气变幻莫测，即使是春天，突如其来的暴风雪也会覆盖一切。北极熊靠着厚厚的毛皮和脂肪层抵御寒冷，它们的熊毛看似白色，皮肤却是吸热的黑色，熊毛也不是白色，而是半透明的，厚厚的毛皮不只保温，更可将阳光的热力传至皮肤，这就意味着，不管环境多么恶劣，也很少有热力流失。
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选择擅长的领域继续答题？
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教育/科学 >> 科学技术 解析: 如果你看过北极熊的纪录片,你就大概了解了.让我说的话1.北极熊是一种冬眠动物,和北极的时钟很匹配,冬天来时就睡,开春有食物就吃,没有劲敌,它自己就是北极霸主,谁不喜欢这样的生活?2.北极熊爱吃海豹,那可是他的美味,别的地方没有.3.在一片空旷的北极,北极熊的能力才能发挥,它体格大,但在这里却身轻如燕,用它异常灵敏的嗅觉探测到海豹后,就能瞬间扑出去抓住猎物.4.借用别人的观点:从生态平衡的角度来考虑，如果北极熊这种庞然大物也在草原上逛来逛去，不仅会对本来就为数不多的驯鹿和麝牛等的生存造成巨大威胁，而且也会与狼群争食，使狼群陷入饥饿的境地。或许是造物主的深思熟虑和巧妙安排，或许是北极熊不屑于与狼为伍，北极熊生活的中心地区是在冰盖上。
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