百度试题 结果1 题目 (C)4.- How long do the bears hibenate ()?-The bears hibernate for about months A. four B. five C. four or five D. five or six 相关知识点: 试题来源: 解析 答案见上 反馈 收藏
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. But it isn't as clear-cut as curling up and going to sleep ...
Why Do Bears Hibernate? by Darice Bailer (Tell Me Why, Tell Me How series) (eBook)Bailer, Darice
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...
I finished Beggar Bears (乞丐熊) in two nights.It is a really good book.At first,I was surprised because it wasn't funny like your other books,but then I got to thinking (you said readers should think) and decided a book doesn't have to be funny to be good,...
How do animals spend the winter?Some birds fly 2 for the winter. They go to a warmer place for food. This is 3 a migration(移栖).Some animals hibernate(冬眠) all winter. This is a deep 4 . Bears hibernate in dens(兽穴). Frogs hibernate at the bottom of 5 . Th...
Black bears who hibernate during winter don't let sleep stop them from giving birth.Pregnant bears in the wildhave been recorded doing exactly that, with their heart rates increasing throughout the pregnancy and spiking during birth. After the cubs are born, the mama bear's heart returns to ...
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Black bears who hibernate during winter don't let sleep stop them from giving birth.Pregnant bears in the wildhave been recorded doing exactly that, with their heart rates increasing throughout the pregnancy and spiking during birth. After the cubs are born, the mama bear's heart returns to ...