调车人员在车上看枕木头（轨长12.5m铺18根枕木）观速时，接近看不清枕木根数时，其速度约为（）。（B、3、X）[05-00-03-01][020103] 5km/h。 13km/h。 15km/h。 18km/h。
For small and medium sized companies, the logistics management is still （）. decentralized 。 centralized 。 integrated 。 concentrated。
There is no difference between the environmental logistics and the（） logistics. white 。 red 。 blue 。 green。
（）is based on logistics network but more computerized and systemized than logistics operation. Virtual logistics 。 Imaginary logistics 。 Thinking logistics 。 Logistics planning。
进站信号机外制动距离内超过6‰下坡道是指制动距离内的（）坡度。（A、3、X）[05-00-01-02][010102] 最大。 换算。 平均。 实际。
（）is the place to store the goods imported without paying duty and under customs’ supervision.
