2019年6月英语四级听力50篇:07 Plastic
英语四级听力50篇:07 Plastic
We use plastic wrap to protect our foods. We put our garbage in plastic bags or plastic cans. We sit on plastic chairs, play with plastic toys, drink from plastic cups, and wash our hair with shampoo from plastic bottles!
Plastic does not grow in nature. It is made by mixing certain things together. We call it a produced or manufactured material. Plastic was first made in the 1860s from plants, such as wood and cotton. That plastic was soft and burned easily.
The first modern plastics were made in the 1930s. Most clear plastic starts out as thick, black oil. That plastic coating inside a pan begins as natural gas.
Over the years, hundreds of different plastics have been developed. Some are hard and strong. Some are soft and bendable. Some are clear. Some are many-colored. There is a plastic for almost every need. Scientists continue to experiment with plastics. They hope to find even ways to use them!
编辑推荐:
下载Word文档
温馨提示:因考试政策、内容不断变化与调整,长理培训网站提供的以上信息仅供参考,如有异议,请考生以权威部门公布的内容为准! (责任编辑:长理培训)
点击加载更多评论>>