“People hear the word‘nuclear’and think of something very dangerous, “ he said. “However, nuclear power sources have already been safely powering a variety of devices, such as pace-makers, space satellites and underwater systems. “

　　His new idea is not only in the battery’s size, but also in its semiconductor (半导体). Kwon’s battery uses a liquid semiconductor rather than a solid semiconductor.

　　“The key part of using a radioactive battery is that when you harvest the energy, part of the radiation energy can damage the lattice structure (晶格结构) of the solid semiconductor. “ Kwon said. “By using a liquid semiconductor, we believe we can minimize that problem.”

　　Together with J. David Robertson, chemistry professor and associate director of the MU Research Reactor, Kwon is working to build and test the battery. In the future, they hope to increase the battery’s power, shrink its size and try with various other materials. Kwon said that the battery could be thinner than the thickness of human hair.

　　1. Which of the following is true of Jae Kwon?

　　A. He teaches chemistry at MU.

　　B. He developed a chemical battery.

　　C. He is working on a nuclear energy source.

　　D. He made a breakthrough in computer engineering.

　　2. Jae Kwon gave examples in Paragraph 4 　.　

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