单选题
1.[概括大意]Bad design is largely to blame， says Sanchez. In a separate survey of CD players last year， her colleague Wolfgang Huber found that two machines with similar features used 28 watts and 2 watts respectively on stand-by. “For most products， we believe that stand-by power can be reduced to one watt or less，” says Sanchez.
The main idea of this paragraph is __________.
A.Factor Leading to Energy Waste
B.Home Appliances
C.Proposals to Cut Energy Consumption
D.Energy Consumption Test
正确答案：A
答案解析：文章的第四段进一步阐明导致电能被白白浪费掉的主要原因，作者引用科学家Sanchez的话，认为家电设备设计不合理是一个重要因素。第四段的第一句也是本段的主题句。选项A的意思是“导致电能消耗的因素”，与本段第一句意思相符，故为正确答案。