题目

阅读理解 With renewable energy the big problem is storing the electricity for when the sun does not shine and the wind does not blow. A solution, one group of scientists thinks, could have lain beneath our feet all along. Michael Harbottle from Cardiff University are leading the project, which seeks to turn soil into a kind of battery by using the microbes within. For now the voltages （电压） Harbottle's team is working with are too small for the requirements of the electric system. But there are still clear applications if the team can make it work. The planned system involves running a current between buried electrodes （电极） . This stimulates certain bacteria in the soil. Just as sunlight provides the energy for plants to make sugar from carbon dioxide and water, so the electrical energy lets the bacteria convert carbon dioxide into a chemical called acetate. This acetate becomes in effect a chemical store of energy, and, when the energy is needed, a different circuit （电路） is switched on, giving different bacteria the energy to breakdown the acetate. This process frees electrons, which flow through the circuit, providing electricity on demand. "The bugs will eat the food, pass the electrons, and it will power the lightbulb at the same time, " said Harbottle. "It's no real difference from what they're doing when they're consuming food and producing energy to grow. It's just we are making use of that energy to get a little bit for ourselves. " For now, though, there are more fundamental questions. As with all energy storage systems, the viability （可行性） could depend on how much energy is lost in the process. Unlike in other energy storage systems, it also depends on whether anything eats these bacteria and what happens when it rains. "It's not in a box. It's not contained. The things you reusing can be moving around；they can be spreading to all sorts of places. The challenge, " Harbottle admitted, "is that it's an uncontrolled environment. " （1） What's the project mainly about? A . Exploring new energy. B . Finding new storage. C . Removing carbon dioxide. D . Discovering new microbes. （2） What does the underlined word "convert" in paragraph 3 mean? A . Generate. B . Transfer. C . Turn. D . Exchange. （3） What is paragraph 4 mainly about? A . The usage of adding more circuits. B . The process of releasing electricity. C . The food necessary for raising bugs. D . The equipment to store the electrons. （4） What problem might Harbottle try to solve next? A . How to keep the bacteria stay put. B . How to reduce the effects of rains. C . How to make the bacteria live longer. D . How to produce more electrical energy. 答案： B B B A

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