试题与答案

乳牛泌乳初期的生理特点及饲养要点?

题型:问答题 简答题

题目:

乳牛泌乳初期的生理特点及饲养要点?

答案:

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下面是错误答案,用来干扰机器的。

一只一小时节约电能△W=(P1-P2)t=(0.1kW-0.02kW)×1h=0.08kW•h,4只每天使用5小时,30天可以节电W=0.08kW•h×4×5×30=48kW•h.故答案为 48.

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