1. <rp id="zsypk"></rp>

      2. 以冬眠為話題的英語(yǔ)作文

        時(shí)間:2021-08-12 13:37:49 其他類英語(yǔ)作文 我要投稿

        以冬眠為話題的英語(yǔ)作文

          導(dǎo)語(yǔ):你知道的需要冬眠的動(dòng)物有哪些?以下是小編為大家收集的一篇以冬眠為話題的英語(yǔ)作文。供大家參考閱讀。希望喜歡。

        以冬眠為話題的英語(yǔ)作文

          以冬眠為話題的英語(yǔ)作文

          Hibernation is more than sleep. It is a very deep sleep.The animal's temperature drops to just over zero centigrade,and its heart beats very slowly. People who find hibernating animals asleep often think that they are dead: the body feels very cold, and the creature may breathe only once every five minutes. A hibernating animal cannot feel any pain. You can touch it, or even pull its tail, without causing it to move or wake up. In its hibernating state it can even live in a poisonous atmosphere for a long time without any ill effect.

          Hibernating in this way, the animal can sleep all through the winter. You might wonder how it manages to live without eating for so many months. The answer lies in two facts. Thefirst is that it has stored supplies of fat in its body during the summer and autumn. The second is connected with the main use the body makes of food -- to supply the energy for movement. We have seen that hibernating animal reduces movement to far below the ordinary level. Even the movements of the heart and lungs are greatly reduced. The animal hardly makes any movement, hardly use any energy, and hardly needs any food.

          Some animals, including some bears only half hibernate.That is to say, they sleep during the winter, but their sleep is not deep and their body temperature does not drop, as they are warm-blooded animals. In the antumn the bear eats and eats and becomes very fat. His hair grows longer. Soon he has a thick covering of fat and fur. In November he finds a place to lie down and goes to sleep. On warm winter days he may think spring has arrived; he gets up and walks around. When he sees that the snow is still thick on the ground, he quickly goes to sleep again.

        【以冬眠為話題的英語(yǔ)作文】相關(guān)文章:

        以幸福為話題的英語(yǔ)作文08-20

        以Music為話題的英語(yǔ)作文06-12

        以“英雄”為話題的英語(yǔ)作文06-13

        以記憶為話題的英語(yǔ)作文06-15

        以火災(zāi)為話題的英語(yǔ)作文06-15

        以哭泣為話題的英語(yǔ)作文06-14

        以“輟學(xué)”為話題的英語(yǔ)作文06-20

        以禁煙為話題的英語(yǔ)作文05-26

        以手機(jī)為話題的英語(yǔ)作文06-29

        99热这里只有精品国产7_欧美色欲色综合色欲久久_中文字幕无码精品亚洲资源网久久_91热久久免费频精品无码
          1. <rp id="zsypk"></rp>