A. Polar bears. B. Seals. C. Tigers. D. Monkeys. 相关知识点: 试题来源: 解析 B。原因:文章中提到“The unique ecosystems of the polar regions are also home to a variety of other species, including whales, seals, and various types of birds.”,明确提到海豹在南极地区,而北极熊主要在北极,...
In December 2012, the National Oceanic and Atmospheric Administration declared an“unusual death event”based on a number of ringed seals found on beaches on the Arctic coast of Alaska during the summer. Dead and dying seals were found to have hair loss and skin sores....
Polar bears need the ice. They can't catch seals as well in the water, where there is no ice.In summer, some of the se a ice becomes water.Now, however, the se a ice is becoming water earlier than it used to. There is not as much time for the polar bears to hunt for food....
There are eight species (物种)of bears. They are in different colors and sizes. They live indifferent parts of the world. Read the following to learn about three bear species. Panda Polar Bear Brown Bear FOOD Bamboo Seals and small whales Roots. berries, nuts, and fruit SIZE Up...
(1)C.词义猜测题.根据文章第一段,When ice is on the ocean, the polar bears are on the hunt. They are hunting seals.当海洋上有冰的时候,北极熊就会出来狩猎了,他们会捕猎海豹.可知,划线单词意为:狩猎,故选C.(2)B.细节理解题.根据文章第一段,Polar bears need the ice. They cann't catch seals...
including how more dramatic declines in ice availability will affect predation on Arctic seals. A population might be healthy, but if individuals are suddenly more vulnerable to being eaten, such as by polar bears, numbers will drop nonetheless. When it comes to population growth over time, pup...
aPolar bears are super swimmers . Their hunting ground is the surface of the Arctic ice , where there are lots of seal live there . They always swim between ice floes to catch seals for their food. 北极熊是超级游泳者。 他们的猎场是北极冰的表面,有许多封印活那里。 他们总游泳在冰川之间捉住...
Are seals placental mammals? Are all pouched mammals also marsupials? Are birds ornithischians? Are polar bears placental mammals? Are polar bears mammals or amphibians? Are giraffes placental mammals? Are koalas placental mammals? Are marsupials placental mammals?
In this way it isn’t easy for other small animals to find it. Then it can get those animals for dinner easily. What do bears eat? Most bears eat roots and leaves of plants. Some bears also eat meat when they can get it easily. Polar bears like eating meat from seals (海豹) . ...
apolar bears are super swimmers their hunting ground is the surface of the arctic ice where there are lots of seals live there they always swim between ice floes to catch seals for their food recently the resesrchers fitted the female bear with a radio collar and tracked her as she swam ...