2. 外语
  3. A. Nuclear reactions as the lasting source of the sun’s energy. B. The most important source of energy. C. Types of electromagne

A. Nuclear reactions as the lasting source of the sun’s energy. B. The most important source of energy. C. Types of electromagne

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问题 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.
*
选项
答案E
解析 对比剩下备选项中的核心词(D：machine；E：new collrse of energy：F：ultraviolet radiation)与该段中的用词，可以直接确认答案为E。
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