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NEW TPO 8 Why does the author mention “Geobacter sulfurreducens” in the passage?

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Microbial Fuel Cells
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Microbial fuel cells (MFCs) are an innovative technology that uses bacteria to generate electricity. MFCs harness the natural abilities of microbes to break down waste materials and, in the process, release energy. The concept of using bacteria for power is not new, but recent advances have made MFCs more efficient and practical for broader applications.



Inside MFCs, microbes “eat” things like food waste, and during this digestion, they release tiny particles called electrons.  These electrons move through the system in a controlled way, creating an electric current.  How well the system works depends on the type of bacteria and how the device is set up.  Some types of bacteria are especially good at passing these electrons along, and scientists are always looking for better combinations. One particular type, called Geobacter sulfurreducens , has become famous for its remarkable ability to share energy with the system.

One of the most promising applications of MFCs is in wastewater treatment. Traditional methods of treating wastewater are energy-intensive, but MFCs can treat wastewater while simultaneously generating electricity. This dual function makes them an attractive option for sustainable waste management. MFCs also have potential applications in remote areas where access to conventional power sources is limited.

3.Why does the author mention “Geobacter sulfurreducens” in the passage?

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该题为修辞目的题,题目:作者为什么要在文章中提到“Geobacter sulfurreducens”。 解题思路:需要定位原文中提及了“Geobacter sulfurreducens”的地方,并梳理段落的论述关系,推理出答案。 直接定位原文第二段最后一句话:“One particular type, called Geobacter sulfurreducens, has become famous for its remarkable ability to share energy with the system.(其中一种名为 Geobacter sulfurreducens(硫还原地杆菌) 的细菌,因为它能够非常有效地与系统传递能量而闻名)”可以看出这里作者是在举例,那么前面可能会有相应的观点或现象。再看前一句:“Some types of bacteria are especially good at passing these electrons along...(某些细菌特别擅长传递电子……)”因此作者提到 “Geobacter sulfurreducens”的目的就是:举例说明细菌在MFC中如何表现优秀。 选项分析: A.To give an example of a type of bacteria that works particularly well in MFCs(举例说明某种细菌在MFC中表现特别优秀)符合原文论述逻辑,正确。 B.To explain how MFCs function(解释MFC如何工作)原文中第二段第一句话“Inside MFCs, microbes “eat” things like food waste, and during this digestion, they release tiny particles called electrons”已经在解释MFC如何工作,排除。 C.To illustrate how scientists alter bacteria to improve MFC performance(说明科学家如何改造细菌来提高性能)原文说的是“scientists are always looking for better combinations”,科学家寻找更好的组合,并没有说改造细菌,排除。 D.To compare the use of bacteria with the use of other microbes(比较细菌与其他微生物的使用)全文只讨论了细菌,没有提及其他微生物,排除。

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