In which season do animals like bears often hibernate? A. Spring B. Summer C. Autumn D. Winter 相关知识点: 试题来源: 解析 D。解析:在冬季,一些动物如熊会冬眠,因为冬季食物短缺,通过冬眠来度过寒冷且食物匮乏的时期。春季动物苏醒,夏季动物活跃地觅食等,秋季动物为冬眠做准备。
答案68.A 细节理解题,根据第一段Alaskan black bears hibernate for up to seven months a year可知阿拉斯加黑熊每年冬眠七个月.故选A.69.D 主旨大意题,通读全文可知本文主要向我们介绍了如今专家正在开发使人类进入类似冬眠的方法,使宇航员可以像熊一样冬眠,故选D.70.C 细节理解题,根据倒...
15.Alaskan black bears hibernate for up to seven months a year.during which time they do not eat or drink.before waking up in virtually the same physical state they fell asleep in.Now experts hope to develop methods of putting humans into a similar sta
A) Bears hibernate during winter, butaren't sleeping the whole time. Hibernation for bears simply means they don't need to eat or drink, and rarely urinate or defecate (or not at all). ... In the colder, northern parts of Alaska, bears hibernate about 7 months of the year. Do polar...
Alaskan black bears hibernate for up to seven months a year, during which time they do not eat or drink, before waking up in virtually the same physical state they fell asleep in. Now experts hope to develop methods of putting humans into a similar state which could help astronauts survive...
Deep inside their dens, or wherever they choose to hibernate, bears sustain physiological extremes that would kill any human. In black bears, Kelly regularly observes November hibernation heart rates of 50 beats per minute. But by January these rates plummet to less than half that. Some have ev...
Entering the world of polar bears, one might encounter complexities and curiosities that defy common bear behaviors. Among these variations, the behavior of pregnant polar bears is particularly intriguing and raises a common question:Do polar bears hibernate?Unlike their brown and black bear relatives...
Why Do Bears Hibernate? by Darice Bailer (Tell Me Why, Tell Me How series) (eBook)Bailer, Darice
Bear hibernation is part of a bear's annual cycle of activity, when its metabolic systems change and activity pauses for a period of time varying with the habitat's climate. Grizzly bears hibernate for 5–7 months each year.
American black bears appear in a variety of colors despite their name. In the eastern part of their range(地理分布区) most of these bears have shiny black fur but in the west they grow brown red or even yellow coats. To the north the black bear is actually gray or white. Even in the...