efficiency

1.A benefit that retailers offer in the distribution channel is exchange efficiency.This means that（）.2.Which of the following is not a possible cause of an unfavorable direct labor efficiency variance？下列哪项不是造成不利的直接劳动效率差异的可能原因？3.The responsibilities in handbook ______ that managers have to be concerned with efficiency and effectiveness in the work process4.The results of the Hawthorne test shows that the most important factor affecting production efficiency is at work.5.He concluded that empirical evidence supports the ___of these treatments.A.efficiency6.Metal hydrides, with varying degrees of efficiency,　can be used as a storage medium for hydrogen, often reversibly.7.Freight trains are very efficient, with economy of scale and high energy efficiency.8.The efficiency of the machines has been more than trebled.译文：这些机器的效率已经提高了（）倍多。（请大家填写数字即可。）9.The efficiency of a material in absorbing heat is described by heat capacity