首页
登录
职称英语
[audioFiles]2015m3s/audio_ezfj_ezflisteningd_20151_057[/audioFiles]
[audioFiles]2015m3s/audio_ezfj_ezflisteningd_20151_057[/audioFiles]
游客
2024-09-27
1
管理
问题
选项
答案
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 modem 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!
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3776343.html
相关试题推荐
[audioFiles]2015m3s/audio_ezfj_ezflisteningd_20151_173[/audioFiles]
[audioFiles]2015m3s/audio_ezfj_ezflisteningd_20151_171[/audioFiles]
[audioFiles]2015m3s/audio_ezfj_ezflisteningd_20151_170[/audioFiles]
[audioFiles]2015m3s/audio_ezfj_ezflisteningd_20151_169[/audioFiles]
[audioFiles]2015m3s/audio_ezfj_ezflisteningd_20151_168[/audioFiles]
[audioFiles]2015m3s/audio_ezfj_ezflisteningd_20151_055[/audioFiles]
[audioFiles]2015m3s/audio_ezfj_ezflisteningd_20151_054[/audioFiles]
[audioFiles]2015m3s/audio_ezfj_ezflisteningd_20151_052[/audioFiles]
[audioFiles]2015m3s/audio_ezfj_ezflisteningd_20151_051[/audioFiles]
[audioFiles]2015m3s/audio_ezfj_ezflisteningd_20151_035[/audioFiles]
随机试题
[originaltext]I’msureyourealizethatyourresearchpapersaredueinsix
皱纹的基本画法有哪些?
在全国有重大影响的侵权行为,则由()负责实施。A.国家新闻出版广电总局 B
在无芽孢厌氧菌感染中,临床标本检出阳性率最高的是A.脆弱类杆菌B.双歧杆菌C.丙
共用题干 SemcoAt21,RicardoSemlerbecameb
共用题干 第二篇DownloadKnowledgeDirectlyto
简述影响企业员工薪酬水平的主要原因。?
中国期货保证金监控中心在复核中发现存在以下( )情况的,应当退回客户交易编码申请
赫赫集团公司的前身是在20世纪80年代引进国外某电冰箱生产技术基础上成立的电冰箱
建立一个期货头寸,待这个期货合约到期前将其平仓,再建立另一个到期日较晚的期货头寸
最新回复
(
0
)