Jae Kwon gave examples in Paragraph 4_________.
A、to show chemical batteries are widely applied.
B、to introduce nuclear batteries can be safely used.
C、to describe a nuclear-powered system.
D、to introduce various energy sources.
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正确答案
试题解析
细节理解题。根据文章第四段可知Kwon举例的目的是为了说明原子能电池是安全的,所以B项正确。