According to recent researches switching timeA.may save energy.B.makes no difference.C.pr

外语类 专四 已帮助 人

According to recent researches, switching time

A.may save energy.

B.makes no difference.

C.probably wastes energy.

D.improves work proficiency.

请帮忙给出正确答案和分析,谢谢!

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