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 　.　

　　A. to show chemical batteries are widely applied

　　B. to indicate nuclear batteries can be safely used

　　C. to describe a nuclear-powered system

　　D. to introduce various energy sources

　　3. Liquid semiconductor is used to 　.　

　　A. get rid of the radioactive waste

　　B. test the power of nuclear batteries

　　C. decrease the size of nuclear batteries

　　D. reduce the damage to lattice structure

　　4. According to Jae Kwon, his nuclear battery 　.　

　　A. uses a solid semiconductor

　　B. will soon replace the present ones

　　C. could be extremely thin

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