JaeKwongaveexamplesinParagraph4_________.
A.toshowchemicalbatteriesarewidelyapplied.
B.tointr oducenuclearbatteriescanbesafelyused.
C.todescribeanuclear-poweredsystem.
D.tointr oducevariousenergysources.
正确答案:B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。



