我国新交通法明确规定不得酒后驾车，酒驾容易引发交通事故的主要原因是（　　）

Skin-diving(潜水) is a new sport today. This sport takes you into a wonderful new world. It is like a visit to the moon. When you are under water, it is easy for you to climb big rocks, because you are no longer heavy.
Here, under water, everything is blue and green. During the day, there is lots of light. When fish swim nearby, you can catch them with your hands.
When you have tank (罐) of air on your back, you can stay in deep of water for a long time. But you must be careful when you dive into deep water.
To catch fish is one of the most interesting parts of this sport. Besides, there are more uses for skin-diving. You can clean ships without taking them out of the water. You can get many things from the deep sea.
Now you see that skin-diving is both useful and interesting.

    One day, Mr. Black went into a restaurant. He put his coat on a chair near the door. There was nothing in the pockets of his coat. After he had his meal, he went to take his coat back. He found there was much money in one of his pockets. “Whose is this?” he thought. He saw a waiter near the door. So Mr. Black said to him, “Somebody put a lot of money in my coat. I have no time to wait for him. I have to go. Take it, please. When he comes back, give it to him.” The waiter took it and went away. At the moment, another man came with a coat just like Mr. Black's. “I'm sorry,” said the man. “I took your coat and you got mine. Please give me my coat and the money. ” Mr. Black answered, “I gave it to the waiter. He'll give it to you. ”

    Mr. Black called the manager（经理）, but the manager said, “We have no waiters here. We only have waitresses（女服务员）. He must be a thief（小偷）.”