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2020年，我国每万元CDP能耗下降到54吨标准煤，2003～2020年年均节能率为( )。
D.5.1%.

A.2.8%.
B.3.9%.
C.3%.

【参考答案】

C
解析：2020年，我国每万元GDP能耗下降到1.54吨标准煤，2003～2020年年均节能率为3%。
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