| Scraps of food could soon be helping
power your home, thanks to an ultra-cheap bacteria-driven battery. Its
developers hope that instead of feeding the dog or making garden compost(混合肥料)
,organic household waste could top up your home’s electricity. Although such "microbial fuel cells" (MFCs)have been developed in the past, they have always proved extremely inefficient and expensive. Now Chris Melhuish and technologists at the University of the West of England(UWE)in Bristol have come up with a simplified MFC that costs as little as ￡10 to make. Right now, their fuel cell runs only on sugar cubes, since these produce almost no waste when broken down, but they aim to move on to carrot power. "It has to be able to use raw materials, rather than giving it a refined fuel," says Melhuish. Inside the Walkman-sized battery, A. Microbial fuel cells. B. Cost-efficient microbial fuel cells. C. The efficiency of microbial fuel ceils. D. Organic battery runs robot. [判断题]Man has three basic needs: food, shelter and clothing.
[简答题]
Fast Food [单项选择]A. Adequate liquidity. B. Insufficient liquidity.
C. Increasing liabilities. D. Converting assets. [简答题]food production
[填空题]Article Three
[单项选择]Passage Three
A. They would get much higher scholarships. B. They would get sponsored much longer. C. They would be more valued by employers. D. They would understand the culture better. 我来回答: 提交
|
