Bears hibernate in dens (兽窝) during the winter. They use leaves to make themselves 4.___(comfort) beds. They lose a lot of weight over the winter. 5___(叫醒……是很危险的) a bear when it is hibernating! All these animals wake up in spring when it gets 6.___(warmly). 相关...
The eggs change int new insects in spring and everything begins all over again.66题完成句子;67、68题简略回答问题;69题找出并写下全文的主题句;70题将文中画线句子译成汉语。66. Many birds travel in large groups in autumn because the trip can67. What happens when some animals hibernate?68. ...
Do all bears hibernate? Well, Polar bears don’t need to do so. They are used to living in cold weather. Also, bears in zoos do not hibernate if they are___food in winter. However, this is unhealthy for these animals, because it may cause___to become overweight. Most zoos now all...
Some animals "hibernate" for part or all of the winter. This is a special, very deep sleep. The animal's body temperature drops, and its heartbeat and breathing slow down. It uses very little energy. In the fall, these animals get ready for winter by eating extra food and storing it ...
When and why do some animals like snails go into aestivation ? View Solution When and why do some animals like frogs hibernate ? View Solution Which of the following animals undergo aestivation ? View Solution Why do aquatic animals die in boiled water ?
Bears hibernate in dens(兽窝) during the winter. They use leaves to make themselves 4.__(comfort) beds. They lose a lot of weight over the winter. 5.__(叫醒·...是很危险的)a bear up when it is hibernating! All these animals wake up in spring when it gets 6.__(warmly). 相关...
For people who don’t like winter, animals that hibernate (冬眠) seem to have the right idea. Isn’t it great to bury (埋) your head under the covers (被子) until spring comes? But is hibernation the same as sleeping? Well, despite what you may have heard, animals that hibernate don...
Do alligators hibernate in winter? No, cold-blooded animals do not hibernate. Instead, they can undergo phases of dormancy when the temperatures drop, and it becomes too cold for them to be out in the open. They create a “gator hole” along the waterway that provides protection during extr...
Some animals eat different kinds of foods as the seasons change. Some animals hibernate (冬眠) for part or all of the winter. This is a special, very deep sleep. the animal ' s body temperature drops, and its heartbeat and breathing slow down. it uses very little energy. In autumn, ...
Polar bears do not hibernate. Only pregnant polar bears den. Unlike hibernation, a polar bear's heart rate and temperate do not decrease, this ensures the