2. 外语
  3. A. traditional lighting is less durable and dearer B. a laser excited the quantum dots C. America adopted LEDS D. gr

A. traditional lighting is less durable and dearer B. a laser excited the quantum dots C. America adopted LEDS D. gr

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问题     A. traditional lighting is less durable and dearer
    B. a laser excited the quantum dots
    C. America adopted LEDS
    D. graduate students work hard
    E. quantum dot mixtures are magic
    F. it is more efficient
Over one quarter of energy consumption for lighting could be saved by 2025 if ______.
选项
答案C
解析 题干的“over one quarter of energy consumption for lighting could be saved by 2025”可在第五段第二句中找到。题干配上选项C后表达的意思与该句的意思相符，所以C是正确答案。
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