5 These systems use low-carbon energy sources, such as sewage waste heat, to red

問題詳情

5 These systems use low-carbon energy sources, such as sewage waste heat, to reduce the use offossil fuels.
(A) toxic
(B) chronic
(C) renewable
(D) dispensable

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答案：C
難度：計算中-1
書單：沒有書單，新增

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