2. 外语
  3. ______burning coal, oil and gasoline are responsible for the globing warming? ______energy savings mean substantial economic be

______burning coal, oil and gasoline are responsible for the globing warming? ______energy savings mean substantial economic be

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问题 ______burning coal, oil and gasoline are responsible for the globing warming?
______energy savings mean substantial economic benefits?
选项 A、 
B、 
C、 
D、 
答案B,C
解析 B. 提到校园中的许多旧楼应该更有效地利用能源，这样可以节约钱。C提到在待电状态下，家电也在使用电，这可以从账单上看出来。
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