生体内体循环和肺循环的列表？？

感情脆弱
性格软弱
生体 虚伪
力量薄弱

1、
1.You should eat lots of fruit.
2.you should go to bed early.
3.you should eat a lot of vagetables.
4.you shouldn`t eat too many meat.
5.you shouldn`t sleep late.
6.you should exercise a lot.
就会第一题…………或许咱们的教材不一样…………我们没有这个

锻炼身体
清晨,爷爷在公园里锻炼身体

What is the most important thing in the world? I think it is health.You can take away our money, house, car, or even our clothes and we can survive. But if our health was taken away, we would surely die. That is why we always try to eat in a healthy way and exercise regularly.
什么是世界上最重要的事情?我想,答案应该是健康.我们可以在没有钱、房子、车子,甚至衣服的情况下,活着.但是如果我们的健康被带走了,我们肯定就活不下去了.这就是为什么我们总是努力以一种健康的方式吃东西和规律地运动.
In order to eat healthily, I usually avoid eating food high in fat, like french fries or cookies. I also eat little meat. I eat a lot of vegetables and fresh fruit which are full of vitamins. Taking exercise every day helps us build a strong body. Regular exercise is an important part of keeping me healthy.
为了能吃得健康,我常常避免吃高脂肪的食物,比如炸薯条或甜点.我也很少吃肉.我会吃很多的蔬菜和富含维他命的新鲜水果.每天做运动有助于我们拥有强健的身体.有规律的运动是我们保持身体健康的一个重要部分.
What＇s more, I think friends are an important part of one's health. Many studies show that people with a wide range of social contacts get sick less than those who don't. I always feel better when I am with friends than when I am alone. When I am with my friends, I always laugh. Laughing is also an important part of health. I like to laugh with my friends.
还有,我认为,朋友也是让我们保持健康的重要部分.许多研究显示,有复杂人际关系的人比较不容易得病.当我与朋友一起时,我总是感觉比单独一个人好.当我与朋友一起时,我总是笑声不断.欢笑也是健康的重要组成部分.我喜欢和朋友一起大笑.
By eating properly and exercising regularly, I can keep my body at a proper weight and keep healthy. By spending time with my friends, I can keep my mind as well as my body happy. These things sound easy to do, but not many people can manage them. I think a strong will is necessary if we want to keep healthy.
通过合理的饮食和规律性的运动,我可以保持身体健康和体重适中.与朋友一起的时光,可以让我的思想和身体一样开心.这些事情听起来很容易去做,但没有很多人能成功做到.我想,我们如果想要健康,那强大的意愿是需要的.

以50Kg为标准的话,就是50立方分米,选B,因为V=M/rou,人的质量是50Kg也人体的密度跟水的密度差不多,ρ人=1.0×10^3kg/m^3 估算一个中学生的

人类病原菌对身体有害,比如：沙门氏菌、痢疾杆菌等.
人类益生菌对身体有好处,比如：酸奶中常用的乳酸链球菌、双歧杆菌、保加利亚乳杆菌、

哺乳,体温恒定

陆生高等动物具有发达的感觉器官和神经系统、防止水分散失的结构
这是对陆地生活的适应
我们生物书上这么写的!