The lube oil cooler is located after the lube oil filter in order for ()
A. the filter to operate more efficiently
B. the lube oil cooler to be bypassed
C. positive lube oil pump suction to be assured
D. galvanic action in the cooler to be minimized
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数字音视频产品中有很多时钟信号,其频率从几十千赫至几千兆赫;一般为()。
影响粘着系数的因素有:牵引力、轮轨材料、踏面形状、气候等。
A. 正确
B. 错误
泰和马市镇蜀江村,从明代永乐间欧阳氏中进士,至清乾隆年间的300多年里,该村高中进士人数为()。
A. 28人
B. 21人