英语阅读一 综合作业I Read each of the following paragraphs and decide what the topic is. Then decide on the general statement (the main idea) the author makes about the topic. 10*3（30 分）1. What exactly is a network? In the world of computers, a network simply means two or more computers linked together in some way. This allows people in different places to communicate with each other and to share data and resources. For example, a school or an office might have a big central computer, called a server. It stores various programs and files. If someone on the network, using another computer, wants to use one of the files on the server, his or her computer would retrieve that file from the server.Topic: Main idea:2. Forests are not just important for timber. A forest acts like a giant sponge, absorbing rainfall and preventing it from running away into rivers. It then releases the water slowly by evaporation from its leaves. This helps to stabilize the rainfall of areas downwind from the forest. Forest cover also prevents the soil being eroded (worn away) and silting up rivers and lakes. By holding back the water, the forest prevents disastrous flooding further downstream. Topic: Main idea: 3. Whenever you hear a sound, find out where it comes from and what causes it. We make sounds by making things move to-and-fro. This to-and-fro movement is called vibration. It means moving up and down or forwards and backwards very fast. These vibrations cause the air to vibrate. This makes sound waves. Topic: Main idea: II. Guess the meaning of the words according to the context. (20 分)10*21. Whales are enormous animals. You can not imagine how big some whales are.A. huge B. funny C. strong2....
