老师：同学们大家好，我是来自北京大学附属中学石景山学校的甄树婷老师。今天我们一起来学习北师大版八年级上册第4单元第 12 课 healthy box period one now， lets start our lesson from the title healthy bones we know that were going to talk about bones today， bone hair means。骨头 read after me woon okay lets have a free talk now do you know anything about bombs，look， this is a picture of a bone bones are hard on the outside， but they are soft on the inside outside means。外面，外部，外面的，在或向外面，在外面。 inside means。里面，内部，里面的，在或项里面，在里面。
老师：please write after me outside。 Outside, inside, inside. Let's read the sentence together. Bones are hard on the outside, but they are soft on the inside. Look at this picture. Both are important because they can make blood. Blood carries nutrients through our bodies. We know that. Bones can support our bodies and help us move and bones can make blood. They are so important. But how can we keep our bones healthy? In my opinion, I think we need Calcium because it can make our bones solid. Calcium means guy, solid means jianying raise up to me, Calcium tells you solid, solid. Let's read a sentence together. We need Calcium because it can make our bones solid. Do you know more ways to keep our bones healthy? Hope you can share with me.
老师：These are the new words we are going to learn today. Let's raise them together. Boom, boom. Blood, blood, hold, hold. Outside, outside, inside, inside you should, you should. Waste, waste. Calcium, Calcium, vitamin, vitamin. So much for the new walls.
老师：Look, there are some statements about both, but one of them is not true. Can you find out the force? Now let's take a look at the following sentences and check who knows more about bones. Now let's read them first. Number one, the smallest bone in our body is in our head. Number two, a 20 year old man has more bones than a baby. Number three, our bones stop growing when we are 21 to 25. So which one is force? Yes, number two. Have you got the correct answer? Good job. But do you know why No. 1 and No. 3 are true? No. 2 is force.
老师：Let's read the sentences one by one and I will explain the reasons for you. The first one, the smallest bone in our body is in our head is right because the smallest bone in the body is in your ear. And it's called the stereoboom or steps. The name of the smallest bone? S. Jungu.
老师：Now let's look at number two. A 20 year old man has more bones than a baby. Who has more bones? An adult or a baby? Yes, a baby has more both, so is force. Adults have less bones than babies because some of their bones feels together to form one bone when they grow up.
老师：Let's look at the last sentence. Our bones stop growing when we are 21 to 25 is true because women's bones stop growing around the age of 21, while men stop around 25.
老师：So far, we have Learned some knowledge about bones. T
查看隐藏内容
