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) What has become a concern about plastic? ( )

A、Using it properly.

B、Producing it cheaply.

C、Developing its properties quickly. ,

D、Evaluating its contributions fairly.

时间：2021-09-01 17:06 关键词：青书学堂平顶山学院英语(专升本) 报刊阅读(专升本)

答案解析

A

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