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[audioFiles]2016m4x/audio_ezfj_153_20164[/audioFiles]
[audioFiles]2016m4x/audio_ezfj_153_20164[/audioFiles]
游客
2023-11-02
9
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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 more ways to use them. /
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