雅思小作文--地图流程图.ppt

P1 This diagram illustrates the recycling process of glass bottles. The whole process is a cycle which can be divided into three main stages. P2 In the first stage, used bottles are collected at a recycling point ready to be transported by a truck. The second stage starts in a cleaning plant, where these recycled bottles are sorted by color into green, brown and clear ones and washed by high-pressurised water. When the cleaning is done, the bottles are conveyed to a glass factory where they are cut into glass pieces which are then poured into a furnace. P3 After being heated in the furnace, the broken glasses are melted into liquid, which flows into a glass mold. Here new glass liquid is added and the molding process takes place. In the final stage, new, empty bottles are filled with liquid, then packed and despatched to the supermarket ready to be picked by consumers. At this point, a cycle has been completed and a new cycle will begin. The diagram below shows the life cycle of the silkworm and the stages in the production of silk cloth. Example 2. P1 The first diagram shows that there are four main stages in the life of the silk worm.First of all, eggs are produced by the moth and it takes ten days for each egg to become a silkworm larva that feeds on mulberry leaves. This stage lasts for up to six weeks until the larva produces a cocoon of silk thread around itself. After a period of about three weeks, the adult moths eventually emerge from these cocoons and the life cycle begins again. P2 The cocoons are the raw material used for the production of silk cloth. Once selected, they are boiled in water and the threads can be separated in the unwinding stage. Each thread is between 300 and 900 metres long, which means they can be twisted together, dyed and then used to produce cloth in the weaving stage. P3 Overall, the diagrams show that the cocoon stage of the silkworm can be used to produce silk cloth through a very simple process. 注意事项 首先说明是做什么工作的过程，目的是什么； 按时