营销计划中为避免意外事件而制定的预算,称之为()。
A. 意外预算
B. 营销预算
C. 促销活动预算
D. 沟通预算
医用皱纹纸包装的无菌物品,有效灭菌状态可保持:().
A. 3个月
B. 30天
C. 6个月
D. 一年以上
What is the crank angle between any two crank throws in the firing order of a four-stroke/cycle, in line, eight cylinder diesel engine?()
A. 45
B. 60
C. 90
D. 100