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以下哪种技术不能延长手机电池的使用寿命()
A.功率控制
B.dtx
C.drx
D.时间提前量
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以下哪种()不能提高资源效率 Which of the following() can't improve resource efficiencyA.提高物质循环率 Increasing of material recycling rateB.降低物质排放率 Decreasing of emission rateC.延长产品使用寿命 Extending product life spanD.提高年均增长率 Speeding up annual growth rate
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以下哪种()材料的生态性能更好 Which of the following materials has better ecological properties()A.使用寿命较短 Materials with shorter service life spansB.使用寿命较长 Materials with longer service life spansC.使用寿命不变 Materials with constant service life spansD.与使用寿命无关 Ecological property has nothing to do with its service life
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