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【单选题】
()反映的是特定时间段的能源利用状况。
A.
能源消耗
B.
能源指标
C.
能源效率
D.
能源基准
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D.
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A.
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A.
0或1
B.
非负整数
C.
大于零的非整数
D.
以上三种都可能
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