Paragraph 4__________ 查看材料A.Nuclear reactions as th

Paragraph 4__________ 查看材料

A.Nuclear reactions as the lasting source of the sun"s energy

B.The most important source of energy

C.Types of electromagnetic energy

D.The machines used for energy generation

E.Seeking new sources of energy

F.The use of ultraviolet radiation in medicine

请帮忙给出正确答案和分析，谢谢！