阅读以下短文，从每小题所给的A、B、C、D四个选项中，选出一个与短文内容相符的最佳选项。
Plastic waste is an increasingly important problem. Up to now, only 9% of the plastics ever produced have been recycled. The rest remain on earth for hundreds of years. They wash out to the ocean to become rubbish, harm wildlife and break down into small plastics that can enter the human brain and other parts of our bodies.
Recently, scientists have developed a new method to break down plastic waste with the help of water in the air. The researchers mixed a special metal and activated carbon(活性碳) with PET, the most common type of polyester(聚酯) plastic. Then they heated the mixture. After a short time, this broke the chemical connections in the polyester. Next, when the team left the material in the air, the mixture turned into TPA, a polyester material, and acetaldehyde, an industrial chemical. Finally, these valuable chemical materials were recycled.
After the first success, researchers tested the method on different plastics and found it worked on polyester plastic only. That meant they didn't need to separate different kinds of plastics. Also, when they added water, it stopped working because the amount(数量) of water in the air was just right.
The team's next plan will be to use the method widely in industry.
“It’s hopeful that our technology can hugely reduce plastic pollution, lower the environmental footprint of plastics and help materials be reused instead of being thrown away,” researchers said. “It’s a leap towards a cleaner, greener future, and it shows how creative chemistry can solve world challenges in a way that joins hands with nature.”
() 1. What harm of plastics is mentioned in Paragraph 1?
A. Polluting the sea.
B. Warming the air.
C. Reducing wetlands.
D. Causing wildfire.
() 2. How did the team do the research?
①Heat the mixture. ②Leave the mixture in the air. ③Recycle the chemical materials. ④Mix a special metal and activated carbon with PET.
A. ④－②－①－③
B. ④－②－③－①
C. ④－①－②－③
D. ④－①－③－②
() 3. What do we know about the method according to the passage?
A. It works widely in industry.
B. It works after adding water.
C. It works on different plastics.
D. It works without plastic separation.
() 4. How do researchers like their technology?
A. It will improve people's creativity.
B. It will help with a green environment.
C. It will prevent people from using plastics.
D. It will stop the present pollution problems.
() 5. Which can be the best title for the passage?
A. Turn to plastics for more metals
B. Put plastics into wider farming use
C. Recycle plastics for a cleaner future
D. Improve plastic production in a better way

1. A 2. C 3. D 4. B 5. C

【分析】
本题为阅读理解题，需根据每个问题定位短文对应段落，提取关键信息作答：
1. 第1题定位第一段，查找塑料危害的相关描述；
2. 第2题定位第二段，梳理研究的操作步骤顺序；
3. 第3题定位第三段，明确该塑料回收方法的特点；
4. 第4题定位最后一段，提取研究人员对技术的评价；
5. 第5题需概括全文主旨，选择最贴合的标题。
【解析】
1. 第1题：定位第一段，文中提到塑料垃圾“wash out to the ocean to become rubbish”，即污染海洋，对应选项A，故选A。
2. 第2题：定位第二段，研究步骤依次为：④混合特殊金属、活性炭与PET→①加热混合物→②将材料置于空气中→③回收化学物质，顺序为④－①－②－③，对应选项C，故选C。
3. 第3题：定位第三段，文中明确“they didn't need to separate different kinds of plastics”，即该方法无需分离不同种类的塑料，对应选项D；A项是未来计划而非现状，B项加水会使方法失效，C项仅对聚酯塑料有效，均错误，故选D。
4. 第4题：定位最后一段，研究人员称该技术“towards a cleaner, greener future”，即有助于绿色环境，对应选项B；A、C、D均与原文不符，故选B。
5. 第5题：全文围绕用新技术回收塑料、减少污染、创造更清洁未来展开，对应选项C；A、B、D均偏离主旨，故选C。
【答案】
1. A 2. C 3. D 4. B 5. C
【知识点】
阅读理解（细节理解、事实排序、主旨大意）
【点评】
本文是关于塑料回收新技术的说明文，考查学生快速定位细节、梳理事件逻辑、概括主旨的阅读能力，题目难度适中，只要仔细阅读短文对应段落即可正确作答。
【难度系数】
0.6