2. 职称英语
  3. [audioFiles]2016m4x/audio_ezfj_025_20164[/audioFiles] Na

[audioFiles]2016m4x/audio_ezfj_025_20164[/audioFiles] Na

游客2024-09-20  45
问题  
选项
答案                         Natural and Synthetic Rubber
    People get natural rubber from rubber trees / as a white, milky liquid, which is called latex. / They mix it with acid, and dry it, / and then they send it to countries all over the world. / They started rubber plantations in countries / with hot, wet weather conditions, / but these still could not give enough raw rubber / to meet the needs of growing industry. / It was always possible that wars or shipping trouble could stop supplies. / In the end, they found a way of making artificial, man-made rubber / which is in many ways better than / and in some ways not as good as natural rubber. / It is usually cheaper than natural rubber. / Today, the world needs so much rubber that / we use both natural and artificial rubber in large amounts. /
解析
转载请注明原文地址:http://tihaiku.com/zcyy/3765828.html
相关试题推荐
随机试题
最新回复(0)