[七下英语基础训p7作文]Last sunday. I and my father, mother, grandparents, brother went to hutiaoxiaby bus. In the morning we came down the mountain. I saw wooded mountains, wild flow...+阅读
鲸鱼和海豚等海洋哺乳动物的居住生活在海洋中.它们有两种基本睡眠方式：无论是垂直或水平的身体，以安静地留在水侧，同时在同一侧慢慢游动位置在床的，无论是.
休眠，吻海豚的大脑是只有一面停止活动，对眼睛的相对侧开始断裂.对大脑的另一边是清醒的，但较低的警觉性.当你需要大脑的这一边浮出水面新鲜空气信号的气息.大约两个小时后，海豚将交换的大脑左，右两侧承担的任务，大脑清醒一侧开始休息，对方有休息2小时大脑被吵醒.
为了避免在睡眠时溺水，海洋哺乳动物保持自己的呼吸孔的控制是至关重要的.虽然有争论这一点，但大多数研究人员认为海豚鲸鱼，或必须保持清醒和警觉，以确定是否它的呼吸孔露出水面.
海洋哺乳动物，还有其他的方法，可以使他们比其他类型的哺乳动物时屏住呼吸.龙海洋哺乳动物可以吸入更多的空气，因为他们占了肺身体比例比人的肺大.此外，它们可以交换更多的氧气每个吸气和呼气，其红血细胞也必须携带更多的氧气的能力.当潜水，海洋哺乳动物，仅血液流向身体部位需要氧气 - 心脏，大脑和肌肉与游泳有关.最后，海洋哺乳动物一氧化碳（CO）具有更强的能力来承受.事实上，海洋哺乳动物很少“溺水”，因为他们都没有水下呼吸.
鲸鱼都睡了一天.鲸鱼睡觉，总有几个脑袋凑在一起，找到一个安全的地方，头先，尾出，圆，静静地浮在海面上.如果你听到任何噪音，他们立即散去.大多数鲸成群
习惯都不是很显著，除了抹香鲸习惯举办小型的家庭，其成员往往是雌鲸，鲸幼崽的男性和每一个
以下为关联文档：
高中必修一英语作文our math teacher is a chinese person who is about 45 years old, his figure is tall and nice.but he is strict with his students and teaches knowledge carefully i...
高一必修一英语作文Dear Editor, I am a high school student and now I am going to take the College Entrance Examination. I am writing to you about my difficulty in learning English...
高一英语必修一作文高一，英语作文大概也就80--120 吧。别急！ 首先，给你说一下，作为一个中国人要写什么程度的英语作文。 1.作为一门外语，不像我们写母语作文那么长 （一般100左右就差不多）， 也不必那么...
关于鲸的英语作文怎么写Nowadays,the whales is in danger.Because many countries kill them for different use,they are dying out.To protect our earth and ocean,especially the diversity o...
有关鲸鱼的英语作文70字左右Marine environment is one in water, seawater tolerance hydrolyzate and suspended solids, seabed sediment and marine organisms, including complex systems. Ocean...
鲸鱼英语作文65字数展开全部 Blue whale is the world's largest animal,the body was blue-gray.whales,sea travel will not get lost all use of the whale is a very good person,and now...
关于鲸鱼的英语作文50子Whale are huge animals. They live in the sea and eat small fish and other sea life. One intere sting fact is whales can jump high out of water. Some kinds of wh...
介绍鲸鱼的英语作文Blue whale is the world's largest animal, the body was blue-gray. Now catch the largest blue whale to the site in the Atlantic near the Falklands. This 33.5 m l...
写一篇关干介绍鲸鱼的英语作文Whales 鲸鱼 1.Everyone has heard about whales.What a beautiful sight it must be to sea a whale.It is no wonder so many stories have been written about them.In y...
