【单选题】Many people driving around the suburbs in their giant SUVs while taking on their new cell phones are, in fact, deeply ____.
【单选题】直径相同、材料不同的两根等长实心轴,在相同扭矩作用下,以下说法正确的是( )
【简答题】A.Driving a car. B.Taking a taxi. C.Taking a train. D.Going by subway.
【简答题】A.Driving a car. B.Taking a taxi. C.Going by train. D.Taking the subway.
【单选题】按照营养学会的要求,胆固醇摄入量每天不超过_________,饱和脂肪酸的摄入量占总能量的_________以下。
【判断题】直径相同、材料不同的两根等长的实心轴,在相同的扭矩作用下,它们的最大剪应力相同。()