55. What does Professor David Reay think of the use of microwaves?
- A. It will become less popular in the coming decades.
- B. It makes everyday cooking much more convenient.
- C. It plays a positive role in environmental protection.
- D. It consumes more power than conventional cooking.
答案：C
答案句：Further, the energy used by microwaves is lower than any other form of cooking. Among common kitchen appliances used for cooking, microwaves are the most energy efficient, followed by a stove and finally a standard oven. Thus, rising microwave sales could be seen as a positive thing.
参考译文：此外，微波炉使用的能源低于任何其他烹饪方式。在常见的厨房烹饪电器中，微波炉是最节能的，其次是炉灶，最后是标准烤箱。因此，微波炉销量的上升可以被视为一件积极的事情。
定位线索：题干“What does Professor David Reay think of the use of microwaves”→答案句取自第3段“Thus, rising microwave sales could be seen as a positive thing”；文中“positive thing”对应选项C“plays a positive role in environmental protection”（在环保中起积极作用）。
解析：题干问雷伊教授对微波炉使用的态度，答案句末尾明确说“销量的上升可以被视为一件积极的事情”，且前文强调微波炉最节能，对应C项。A项“将变得不那么流行”与原文相反，B项“更方便”未提及，D项“比传统烹饪耗电更多”与原文“能源低于任何其他烹饪方式”矛盾，属于偷换概念。