【正文】 th it. Yes, you do and be careful. I’m telling you, everything is about to change. Em, I’m in a state of shock so I haven’t had any time to think. With all your money, what about your friends?You mean you right?Sure, why not? Why don’t you give me a new car?And then what? Sure, if I start giving things to my friends, it will never stop. I’ve got the thing. One thing for sure, you’ll have no trouble finding a girlfriend now. Yeah, you’re probably right. I might as well have some fun and enjoy rich life for a while. It would be great to have a nice girlfriend. I’ve never been successful with woman. What are you going to do about your job?I will give notice right away and finish the project I’ve been working on. That’s nice. I should the pany will appreciate it. then what?Then I will take some time for myself and think about I want to do. Any ideas?Nothing definite. But I’ve been considering starting my own business. Or maybe invest in something interesting. Be careful about investing. One of my best friends became an investor after he sought some stock in a pany he was working for. He is really smart but he got fooled into investing a lot of money into a pany that went bankrupt. He ended up losing his entire investment. What happened then?His wife divorced him and took most of his assets with her. So he has to work again. So even smart people can be fooled. Well, I’m in no hurry. So I’ll be careful. I think the first thing I’ll do is to buy a nice house and help my parents. They’ve worked hard all their lives but are still barely able to survive on what they have.That sounds like a good plan. Whatever you do don’t let this go to your head. Try not to lose who you are. Don’t worry, I won’t. I know what you mean. L5 Unit 34 Listening There are several fundamental forces that hold our universe together. One of these, of course is gravity, the force between objects that have mass. Another important force is the electromagnetic force. The electromagnetic force is responsible for the chemical reactions. Without it, there would be no atoms and molecules. Up until a couple of hundred years ago, very little have known about this force. Learning about the electromagnetic force and how to use it was a major step forward. It revolutionized munication, transportation and manufacturing. Imagine what life would be like without electricity. The electromagnetic force has two parts, the electrical force and magnetic force. The electrical force is the force between an electrical charge article such as electron and proton(質(zhì)子). Electric charges attract or repel each other with a force that depends on the distance between them. The magnetic force is the force between magnetic poles such as the north and south pole. In fact, the earth is like a large bar magnet with a north and south pole. Many animals use the earth’s magnetic field to navigate during their migrations. We can also see this magnetic field when we use a pass. Why does the earth have a magnetic field? Many scientists believe that the earth’s magnetic field is due to the earth rotation. Deep inside the earth is solid iron core surrounded by a liquid metal outer core. The moving electric currents inside this liquid metal create a magnetic field. The earth magnetic field is important because it protects us from the solar wind. The solar wind is a current of charge particles ing at us from the sun. when the solar wind nears the earth, the earth’s magnetic field deflects it away. This protects the earth from the radiation(輻射), which can be dangerous to life. It also protects the satellite that we use for munication. Scientists now believe that the earth’s magnetic field is about to reverse. This is called the magnetic field reversal. Every 200,000 to 300,000 years, the earth magnetic field reverses. In other words, the north and the south magnetic pole switch places. This has happened many times in earth’s history, but it has been happening more lately. Recent research provides evidence that there have been 5 magnetic reversals during the past 500,000 years. The most recent event happened approximately 41,000 years ago. Recent studies have found that the earth magnetic field has weakened about 5% per decade. As its current rate, the next reversal could happen within the next century. Some people also worry about the effects of the magnetic field reverse. They think there is a possibility that it could cause many problems. For example, without magnetic field, munications can be disrupted. Birds and other forms of lives could bee confused and get lost. Another effect will the increase in some forms of cancer especially skin cancer. This will be because of the increase in the amount of radiation absorbed by our bodies. The possibility that a field reversal will be an extinction even is very low. There is very little historic evidence to show that previous reversals have caused extinctions. Humans have been on earth for million years, during which there have many reversals. Therefore, scientists believe any changes would be temporary. Another theory is that the earth outer layer could rotate around the outer liquid mental core that make out of the earth. So in the next reversal, continent could ship positions from north to south. Imagine the effect happened, Australia would be in the northern hemisphere. With so many theories, how can we know what to believe? This is important because some of them require us to act well in advance. Otherwise, it will be too late to prevent the catastrophe. This underlines the importance of getting reliable information backed by strong evidence. L5 Unit 34 vocabularyResume, to continue or start again after a pause. After a short interruption, our work resumed and we worked for another hour. Work on the project resumed once we passed the safety inspection(檢驗(yàn)。ve, so he need someone to help him. I think we can take advantage of him because he’s na239。L5